builtin-c2c.c

Go to the documentation of this file.

// SPDX-License-Identifier: GPL-2.0
/*
 * This is rewrite of original c2c tool introduced in here:
 *   http://lwn.net/Articles/588866/
 *
 * The original tool was changed to fit in current perf state.
 *
 * Original authors:
 *   Don Zickus <dzickus@redhat.com>
 *   Dick Fowles <fowles@inreach.com>
 *   Joe Mario <jmario@redhat.com>
 */
#include <errno.h>
#include <inttypes.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
#include <asm/bug.h>
#include <sys/param.h>
#include "util.h"
#include "debug.h"
#include "builtin.h"
#include <subcmd/parse-options.h>
#include "mem-events.h"
#include "session.h"
#include "hist.h"
#include "sort.h"
#include "tool.h"
#include "data.h"
#include "event.h"
#include "evlist.h"
#include "evsel.h"
#include "ui/browsers/hists.h"
#include "thread.h"
#include "mem2node.h"

struct c2c_hists {
    struct hists        hists;
    struct perf_hpp_list    list;
    struct c2c_stats    stats;
};

struct compute_stats {
    struct stats         lcl_hitm;
    struct stats         rmt_hitm;
    struct stats         load;
};

struct c2c_hist_entry {
    struct c2c_hists    *hists;
    struct c2c_stats     stats;
    unsigned long       *cpuset;
    unsigned long       *nodeset;
    struct c2c_stats    *node_stats;
    unsigned int         cacheline_idx;

    struct compute_stats     cstats;

    /*
     * must be at the end,
     * because of its callchain dynamic entry
     */
    struct hist_entry   he;

    unsigned long        paddr;
    unsigned long        paddr_cnt;
    bool             paddr_zero;
    char            *nodestr;
};

static char const *coalesce_default = "pid,iaddr";

struct perf_c2c {
    struct perf_tool    tool;
    struct c2c_hists    hists;
    struct mem2node     mem2node;

    unsigned long       **nodes;
    int          nodes_cnt;
    int          cpus_cnt;
    int         *cpu2node;
    int          node_info;

    bool             show_src;
    bool             show_all;
    bool             use_stdio;
    bool             stats_only;
    bool             symbol_full;

    /* HITM shared clines stats */
    struct c2c_stats    hitm_stats;
    int         shared_clines;

    int          display;

    const char      *coalesce;
    char            *cl_sort;
    char            *cl_resort;
    char            *cl_output;
};

enum {
    DISPLAY_LCL,
    DISPLAY_RMT,
    DISPLAY_TOT,
    DISPLAY_MAX,
};

static const char *display_str[DISPLAY_MAX] = {
    [DISPLAY_LCL] = "Local",
    [DISPLAY_RMT] = "Remote",
    [DISPLAY_TOT] = "Total",
};

static const struct option c2c_options[] = {
    OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
    OPT_END()
};

static struct perf_c2c c2c;

static void *c2c_he_zalloc(size_t size)
{
    struct c2c_hist_entry *c2c_he;

    c2c_he = zalloc(size + sizeof(*c2c_he));
    if (!c2c_he)
        return NULL;

    c2c_he->cpuset = bitmap_alloc(c2c.cpus_cnt);
    if (!c2c_he->cpuset)
        return NULL;

    c2c_he->nodeset = bitmap_alloc(c2c.nodes_cnt);
    if (!c2c_he->nodeset)
        return NULL;

    c2c_he->node_stats = zalloc(c2c.nodes_cnt * sizeof(*c2c_he->node_stats));
    if (!c2c_he->node_stats)
        return NULL;

    init_stats(&c2c_he->cstats.lcl_hitm);
    init_stats(&c2c_he->cstats.rmt_hitm);
    init_stats(&c2c_he->cstats.load);

    return &c2c_he->he;
}

static void c2c_he_free(void *he)
{
    struct c2c_hist_entry *c2c_he;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    if (c2c_he->hists) {
        hists__delete_entries(&c2c_he->hists->hists);
        free(c2c_he->hists);
    }

    free(c2c_he->cpuset);
    free(c2c_he->nodeset);
    free(c2c_he->nodestr);
    free(c2c_he->node_stats);
    free(c2c_he);
}

static struct hist_entry_ops c2c_entry_ops = {
    .new    = c2c_he_zalloc,
    .free   = c2c_he_free,
};

static int c2c_hists__init(struct c2c_hists *hists,
               const char *sort,
               int nr_header_lines);

static struct c2c_hists*
he__get_c2c_hists(struct hist_entry *he,
          const char *sort,
          int nr_header_lines)
{
    struct c2c_hist_entry *c2c_he;
    struct c2c_hists *hists;
    int ret;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    if (c2c_he->hists)
        return c2c_he->hists;

    hists = c2c_he->hists = zalloc(sizeof(*hists));
    if (!hists)
        return NULL;

    ret = c2c_hists__init(hists, sort, nr_header_lines);
    if (ret) {
        free(hists);
        return NULL;
    }

    return hists;
}

static void c2c_he__set_cpu(struct c2c_hist_entry *c2c_he,
                struct perf_sample *sample)
{
    if (WARN_ONCE(sample->cpu == (unsigned int) -1,
              "WARNING: no sample cpu value"))
        return;

    set_bit(sample->cpu, c2c_he->cpuset);
}

static void c2c_he__set_node(struct c2c_hist_entry *c2c_he,
                 struct perf_sample *sample)
{
    int node;

    if (!sample->phys_addr) {
        c2c_he->paddr_zero = true;
        return;
    }

    node = mem2node__node(&c2c.mem2node, sample->phys_addr);
    if (WARN_ONCE(node < 0, "WARNING: failed to find node\n"))
        return;

    set_bit(node, c2c_he->nodeset);

    if (c2c_he->paddr != sample->phys_addr) {
        c2c_he->paddr_cnt++;
        c2c_he->paddr = sample->phys_addr;
    }
}

static void compute_stats(struct c2c_hist_entry *c2c_he,
              struct c2c_stats *stats,
              u64 weight)
{
    struct compute_stats *cstats = &c2c_he->cstats;

    if (stats->rmt_hitm)
        update_stats(&cstats->rmt_hitm, weight);
    else if (stats->lcl_hitm)
        update_stats(&cstats->lcl_hitm, weight);
    else if (stats->load)
        update_stats(&cstats->load, weight);
}

static int process_sample_event(struct perf_tool *tool __maybe_unused,
                union perf_event *event,
                struct perf_sample *sample,
                struct perf_evsel *evsel,
                struct machine *machine)
{
    struct c2c_hists *c2c_hists = &c2c.hists;
    struct c2c_hist_entry *c2c_he;
    struct c2c_stats stats = { .nr_entries = 0, };
    struct hist_entry *he;
    struct addr_location al;
    struct mem_info *mi, *mi_dup;
    int ret;

    if (machine__resolve(machine, &al, sample) < 0) {
        pr_debug("problem processing %d event, skipping it.\n",
             event->header.type);
        return -1;
    }

    ret = sample__resolve_callchain(sample, &callchain_cursor, NULL,
                    evsel, &al, sysctl_perf_event_max_stack);
    if (ret)
        goto out;

    mi = sample__resolve_mem(sample, &al);
    if (mi == NULL)
        return -ENOMEM;

    /*
     * The mi object is released in hists__add_entry_ops,
     * if it gets sorted out into existing data, so we need
     * to take the copy now.
     */
    mi_dup = mem_info__get(mi);

    c2c_decode_stats(&stats, mi);

    he = hists__add_entry_ops(&c2c_hists->hists, &c2c_entry_ops,
                  &al, NULL, NULL, mi,
                  sample, true);
    if (he == NULL)
        goto free_mi;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    c2c_add_stats(&c2c_he->stats, &stats);
    c2c_add_stats(&c2c_hists->stats, &stats);

    c2c_he__set_cpu(c2c_he, sample);
    c2c_he__set_node(c2c_he, sample);

    hists__inc_nr_samples(&c2c_hists->hists, he->filtered);
    ret = hist_entry__append_callchain(he, sample);

    if (!ret) {
        /*
         * There's already been warning about missing
         * sample's cpu value. Let's account all to
         * node 0 in this case, without any further
         * warning.
         *
         * Doing node stats only for single callchain data.
         */
        int cpu = sample->cpu == (unsigned int) -1 ? 0 : sample->cpu;
        int node = c2c.cpu2node[cpu];

        mi = mi_dup;

        c2c_hists = he__get_c2c_hists(he, c2c.cl_sort, 2);
        if (!c2c_hists)
            goto free_mi;

        he = hists__add_entry_ops(&c2c_hists->hists, &c2c_entry_ops,
                      &al, NULL, NULL, mi,
                      sample, true);
        if (he == NULL)
            goto free_mi;

        c2c_he = container_of(he, struct c2c_hist_entry, he);
        c2c_add_stats(&c2c_he->stats, &stats);
        c2c_add_stats(&c2c_hists->stats, &stats);
        c2c_add_stats(&c2c_he->node_stats[node], &stats);

        compute_stats(c2c_he, &stats, sample->weight);

        c2c_he__set_cpu(c2c_he, sample);
        c2c_he__set_node(c2c_he, sample);

        hists__inc_nr_samples(&c2c_hists->hists, he->filtered);
        ret = hist_entry__append_callchain(he, sample);
    }

out:
    addr_location__put(&al);
    return ret;

free_mi:
    mem_info__put(mi_dup);
    mem_info__put(mi);
    ret = -ENOMEM;
    goto out;
}

static struct perf_c2c c2c = {
    .tool = {
        .sample     = process_sample_event,
        .mmap       = perf_event__process_mmap,
        .mmap2      = perf_event__process_mmap2,
        .comm       = perf_event__process_comm,
        .exit       = perf_event__process_exit,
        .fork       = perf_event__process_fork,
        .lost       = perf_event__process_lost,
        .ordered_events = true,
        .ordering_requires_timestamps = true,
    },
};

static const char * const c2c_usage[] = {
    "perf c2c {record|report}",
    NULL
};

static const char * const __usage_report[] = {
    "perf c2c report",
    NULL
};

static const char * const *report_c2c_usage = __usage_report;

#define C2C_HEADER_MAX 2

struct c2c_header {
    struct {
        const char *text;
        int     span;
    } line[C2C_HEADER_MAX];
};

struct c2c_dimension {
    struct c2c_header    header;
    const char      *name;
    int          width;
    struct sort_entry   *se;

    int64_t (*cmp)(struct perf_hpp_fmt *fmt,
               struct hist_entry *, struct hist_entry *);
    int   (*entry)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he);
    int   (*color)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he);
};

struct c2c_fmt {
    struct perf_hpp_fmt  fmt;
    struct c2c_dimension    *dim;
};

#define SYMBOL_WIDTH 30

static struct c2c_dimension dim_symbol;
static struct c2c_dimension dim_srcline;

static int symbol_width(struct hists *hists, struct sort_entry *se)
{
    int width = hists__col_len(hists, se->se_width_idx);

    if (!c2c.symbol_full)
        width = MIN(width, SYMBOL_WIDTH);

    return width;
}

static int c2c_width(struct perf_hpp_fmt *fmt,
             struct perf_hpp *hpp __maybe_unused,
             struct hists *hists)
{
    struct c2c_fmt *c2c_fmt;
    struct c2c_dimension *dim;

    c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
    dim = c2c_fmt->dim;

    if (dim == &dim_symbol || dim == &dim_srcline)
        return symbol_width(hists, dim->se);

    return dim->se ? hists__col_len(hists, dim->se->se_width_idx) :
             c2c_fmt->dim->width;
}

static int c2c_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
              struct hists *hists, int line, int *span)
{
    struct perf_hpp_list *hpp_list = hists->hpp_list;
    struct c2c_fmt *c2c_fmt;
    struct c2c_dimension *dim;
    const char *text = NULL;
    int width = c2c_width(fmt, hpp, hists);

    c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
    dim = c2c_fmt->dim;

    if (dim->se) {
        text = dim->header.line[line].text;
        /* Use the last line from sort_entry if not defined. */
        if (!text && (line == hpp_list->nr_header_lines - 1))
            text = dim->se->se_header;
    } else {
        text = dim->header.line[line].text;

        if (*span) {
            (*span)--;
            return 0;
        } else {
            *span = dim->header.line[line].span;
        }
    }

    if (text == NULL)
        text = "";

    return scnprintf(hpp->buf, hpp->size, "%*s", width, text);
}

#define HEX_STR(__s, __v)               \
({                          \
    scnprintf(__s, sizeof(__s), "0x%" PRIx64, __v); \
    __s;                        \
})

static int64_t
dcacheline_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
           struct hist_entry *left, struct hist_entry *right)
{
    return sort__dcacheline_cmp(left, right);
}

static int dcacheline_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
                struct hist_entry *he)
{
    uint64_t addr = 0;
    int width = c2c_width(fmt, hpp, he->hists);
    char buf[20];

    if (he->mem_info)
        addr = cl_address(he->mem_info->daddr.addr);

    return scnprintf(hpp->buf, hpp->size, "%*s", width, HEX_STR(buf, addr));
}

static int
dcacheline_node_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
              struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    if (WARN_ON_ONCE(!c2c_he->nodestr))
        return 0;

    return scnprintf(hpp->buf, hpp->size, "%*s", width, c2c_he->nodestr);
}

static int
dcacheline_node_count(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
              struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    return scnprintf(hpp->buf, hpp->size, "%*lu", width, c2c_he->paddr_cnt);
}

static int offset_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
            struct hist_entry *he)
{
    uint64_t addr = 0;
    int width = c2c_width(fmt, hpp, he->hists);
    char buf[20];

    if (he->mem_info)
        addr = cl_offset(he->mem_info->daddr.al_addr);

    return scnprintf(hpp->buf, hpp->size, "%*s", width, HEX_STR(buf, addr));
}

static int64_t
offset_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
       struct hist_entry *left, struct hist_entry *right)
{
    uint64_t l = 0, r = 0;

    if (left->mem_info)
        l = cl_offset(left->mem_info->daddr.addr);
    if (right->mem_info)
        r = cl_offset(right->mem_info->daddr.addr);

    return (int64_t)(r - l);
}

static int
iaddr_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
        struct hist_entry *he)
{
    uint64_t addr = 0;
    int width = c2c_width(fmt, hpp, he->hists);
    char buf[20];

    if (he->mem_info)
        addr = he->mem_info->iaddr.addr;

    return scnprintf(hpp->buf, hpp->size, "%*s", width, HEX_STR(buf, addr));
}

static int64_t
iaddr_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
      struct hist_entry *left, struct hist_entry *right)
{
    return sort__iaddr_cmp(left, right);
}

static int
tot_hitm_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
           struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);
    unsigned int tot_hitm;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    tot_hitm = c2c_he->stats.lcl_hitm + c2c_he->stats.rmt_hitm;

    return scnprintf(hpp->buf, hpp->size, "%*u", width, tot_hitm);
}

static int64_t
tot_hitm_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
         struct hist_entry *left, struct hist_entry *right)
{
    struct c2c_hist_entry *c2c_left;
    struct c2c_hist_entry *c2c_right;
    unsigned int tot_hitm_left;
    unsigned int tot_hitm_right;

    c2c_left  = container_of(left, struct c2c_hist_entry, he);
    c2c_right = container_of(right, struct c2c_hist_entry, he);

    tot_hitm_left  = c2c_left->stats.lcl_hitm + c2c_left->stats.rmt_hitm;
    tot_hitm_right = c2c_right->stats.lcl_hitm + c2c_right->stats.rmt_hitm;

    return tot_hitm_left - tot_hitm_right;
}

#define STAT_FN_ENTRY(__f)                  \
static int                          \
__f ## _entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,   \
          struct hist_entry *he)                \
{                               \
    struct c2c_hist_entry *c2c_he;              \
    int width = c2c_width(fmt, hpp, he->hists);     \
                                \
    c2c_he = container_of(he, struct c2c_hist_entry, he);   \
    return scnprintf(hpp->buf, hpp->size, "%*u", width, \
             c2c_he->stats.__f);            \
}

#define STAT_FN_CMP(__f)                        \
static int64_t                              \
__f ## _cmp(struct perf_hpp_fmt *fmt __maybe_unused,            \
        struct hist_entry *left, struct hist_entry *right)      \
{                                   \
    struct c2c_hist_entry *c2c_left, *c2c_right;            \
                                    \
    c2c_left  = container_of(left, struct c2c_hist_entry, he);  \
    c2c_right = container_of(right, struct c2c_hist_entry, he); \
    return c2c_left->stats.__f - c2c_right->stats.__f;      \
}

#define STAT_FN(__f)        \
    STAT_FN_ENTRY(__f)  \
    STAT_FN_CMP(__f)

STAT_FN(rmt_hitm)
STAT_FN(lcl_hitm)
STAT_FN(store)
STAT_FN(st_l1hit)
STAT_FN(st_l1miss)
STAT_FN(ld_fbhit)
STAT_FN(ld_l1hit)
STAT_FN(ld_l2hit)
STAT_FN(ld_llchit)
STAT_FN(rmt_hit)

static uint64_t llc_miss(struct c2c_stats *stats)
{
    uint64_t llcmiss;

    llcmiss = stats->lcl_dram +
          stats->rmt_dram +
          stats->rmt_hitm +
          stats->rmt_hit;

    return llcmiss;
}

static int
ld_llcmiss_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
         struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);

    c2c_he = container_of(he, struct c2c_hist_entry, he);

    return scnprintf(hpp->buf, hpp->size, "%*lu", width,
             llc_miss(&c2c_he->stats));
}

static int64_t
ld_llcmiss_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
           struct hist_entry *left, struct hist_entry *right)
{
    struct c2c_hist_entry *c2c_left;
    struct c2c_hist_entry *c2c_right;

    c2c_left  = container_of(left, struct c2c_hist_entry, he);
    c2c_right = container_of(right, struct c2c_hist_entry, he);

    return llc_miss(&c2c_left->stats) - llc_miss(&c2c_right->stats);
}

static uint64_t total_records(struct c2c_stats *stats)
{
    uint64_t lclmiss, ldcnt, total;

    lclmiss  = stats->lcl_dram +
           stats->rmt_dram +
           stats->rmt_hitm +
           stats->rmt_hit;

    ldcnt    = lclmiss +
           stats->ld_fbhit +
           stats->ld_l1hit +
           stats->ld_l2hit +
           stats->ld_llchit +
           stats->lcl_hitm;

    total    = ldcnt +
           stats->st_l1hit +
           stats->st_l1miss;

    return total;
}

static int
tot_recs_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
        struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);
    uint64_t tot_recs;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    tot_recs = total_records(&c2c_he->stats);

    return scnprintf(hpp->buf, hpp->size, "%*" PRIu64, width, tot_recs);
}

static int64_t
tot_recs_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
         struct hist_entry *left, struct hist_entry *right)
{
    struct c2c_hist_entry *c2c_left;
    struct c2c_hist_entry *c2c_right;
    uint64_t tot_recs_left;
    uint64_t tot_recs_right;

    c2c_left  = container_of(left, struct c2c_hist_entry, he);
    c2c_right = container_of(right, struct c2c_hist_entry, he);

    tot_recs_left  = total_records(&c2c_left->stats);
    tot_recs_right = total_records(&c2c_right->stats);

    return tot_recs_left - tot_recs_right;
}

static uint64_t total_loads(struct c2c_stats *stats)
{
    uint64_t lclmiss, ldcnt;

    lclmiss  = stats->lcl_dram +
           stats->rmt_dram +
           stats->rmt_hitm +
           stats->rmt_hit;

    ldcnt    = lclmiss +
           stats->ld_fbhit +
           stats->ld_l1hit +
           stats->ld_l2hit +
           stats->ld_llchit +
           stats->lcl_hitm;

    return ldcnt;
}

static int
tot_loads_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
        struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);
    uint64_t tot_recs;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    tot_recs = total_loads(&c2c_he->stats);

    return scnprintf(hpp->buf, hpp->size, "%*" PRIu64, width, tot_recs);
}

static int64_t
tot_loads_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
          struct hist_entry *left, struct hist_entry *right)
{
    struct c2c_hist_entry *c2c_left;
    struct c2c_hist_entry *c2c_right;
    uint64_t tot_recs_left;
    uint64_t tot_recs_right;

    c2c_left  = container_of(left, struct c2c_hist_entry, he);
    c2c_right = container_of(right, struct c2c_hist_entry, he);

    tot_recs_left  = total_loads(&c2c_left->stats);
    tot_recs_right = total_loads(&c2c_right->stats);

    return tot_recs_left - tot_recs_right;
}

typedef double (get_percent_cb)(struct c2c_hist_entry *);

static int
percent_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
          struct hist_entry *he, get_percent_cb get_percent)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);
    double per;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    per = get_percent(c2c_he);

#ifdef HAVE_SLANG_SUPPORT
    if (use_browser)
        return __hpp__slsmg_color_printf(hpp, "%*.2f%%", width - 1, per);
#endif
    return hpp_color_scnprintf(hpp, "%*.2f%%", width - 1, per);
}

static double percent_hitm(struct c2c_hist_entry *c2c_he)
{
    struct c2c_hists *hists;
    struct c2c_stats *stats;
    struct c2c_stats *total;
    int tot = 0, st = 0;
    double p;

    hists = container_of(c2c_he->he.hists, struct c2c_hists, hists);
    stats = &c2c_he->stats;
    total = &hists->stats;

    switch (c2c.display) {
    case DISPLAY_RMT:
        st  = stats->rmt_hitm;
        tot = total->rmt_hitm;
        break;
    case DISPLAY_LCL:
        st  = stats->lcl_hitm;
        tot = total->lcl_hitm;
        break;
    case DISPLAY_TOT:
        st  = stats->tot_hitm;
        tot = total->tot_hitm;
    default:
        break;
    }

    p = tot ? (double) st / tot : 0;

    return 100 * p;
}

#define PERC_STR(__s, __v)              \
({                          \
    scnprintf(__s, sizeof(__s), "%.2F%%", __v); \
    __s;                        \
})

static int
percent_hitm_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
           struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);
    char buf[10];
    double per;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    per = percent_hitm(c2c_he);
    return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
}

static int
percent_hitm_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
           struct hist_entry *he)
{
    return percent_color(fmt, hpp, he, percent_hitm);
}

static int64_t
percent_hitm_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
         struct hist_entry *left, struct hist_entry *right)
{
    struct c2c_hist_entry *c2c_left;
    struct c2c_hist_entry *c2c_right;
    double per_left;
    double per_right;

    c2c_left  = container_of(left, struct c2c_hist_entry, he);
    c2c_right = container_of(right, struct c2c_hist_entry, he);

    per_left  = percent_hitm(c2c_left);
    per_right = percent_hitm(c2c_right);

    return per_left - per_right;
}

static struct c2c_stats *he_stats(struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    return &c2c_he->stats;
}

static struct c2c_stats *total_stats(struct hist_entry *he)
{
    struct c2c_hists *hists;

    hists = container_of(he->hists, struct c2c_hists, hists);
    return &hists->stats;
}

static double percent(int st, int tot)
{
    return tot ? 100. * (double) st / (double) tot : 0;
}

#define PERCENT(__h, __f) percent(he_stats(__h)->__f, total_stats(__h)->__f)

#define PERCENT_FN(__f)                             \
static double percent_ ## __f(struct c2c_hist_entry *c2c_he)            \
{                                       \
    struct c2c_hists *hists;                        \
                                        \
    hists = container_of(c2c_he->he.hists, struct c2c_hists, hists);    \
    return percent(c2c_he->stats.__f, hists->stats.__f);            \
}

PERCENT_FN(rmt_hitm)
PERCENT_FN(lcl_hitm)
PERCENT_FN(st_l1hit)
PERCENT_FN(st_l1miss)

static int
percent_rmt_hitm_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he)
{
    int width = c2c_width(fmt, hpp, he->hists);
    double per = PERCENT(he, rmt_hitm);
    char buf[10];

    return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
}

static int
percent_rmt_hitm_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he)
{
    return percent_color(fmt, hpp, he, percent_rmt_hitm);
}

static int64_t
percent_rmt_hitm_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
             struct hist_entry *left, struct hist_entry *right)
{
    double per_left;
    double per_right;

    per_left  = PERCENT(left, lcl_hitm);
    per_right = PERCENT(right, lcl_hitm);

    return per_left - per_right;
}

static int
percent_lcl_hitm_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he)
{
    int width = c2c_width(fmt, hpp, he->hists);
    double per = PERCENT(he, lcl_hitm);
    char buf[10];

    return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
}

static int
percent_lcl_hitm_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he)
{
    return percent_color(fmt, hpp, he, percent_lcl_hitm);
}

static int64_t
percent_lcl_hitm_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
             struct hist_entry *left, struct hist_entry *right)
{
    double per_left;
    double per_right;

    per_left  = PERCENT(left, lcl_hitm);
    per_right = PERCENT(right, lcl_hitm);

    return per_left - per_right;
}

static int
percent_stores_l1hit_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he)
{
    int width = c2c_width(fmt, hpp, he->hists);
    double per = PERCENT(he, st_l1hit);
    char buf[10];

    return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
}

static int
percent_stores_l1hit_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he)
{
    return percent_color(fmt, hpp, he, percent_st_l1hit);
}

static int64_t
percent_stores_l1hit_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
            struct hist_entry *left, struct hist_entry *right)
{
    double per_left;
    double per_right;

    per_left  = PERCENT(left, st_l1hit);
    per_right = PERCENT(right, st_l1hit);

    return per_left - per_right;
}

static int
percent_stores_l1miss_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
               struct hist_entry *he)
{
    int width = c2c_width(fmt, hpp, he->hists);
    double per = PERCENT(he, st_l1miss);
    char buf[10];

    return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
}

static int
percent_stores_l1miss_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
                struct hist_entry *he)
{
    return percent_color(fmt, hpp, he, percent_st_l1miss);
}

static int64_t
percent_stores_l1miss_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
              struct hist_entry *left, struct hist_entry *right)
{
    double per_left;
    double per_right;

    per_left  = PERCENT(left, st_l1miss);
    per_right = PERCENT(right, st_l1miss);

    return per_left - per_right;
}

STAT_FN(lcl_dram)
STAT_FN(rmt_dram)

static int
pid_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
      struct hist_entry *he)
{
    int width = c2c_width(fmt, hpp, he->hists);

    return scnprintf(hpp->buf, hpp->size, "%*d", width, he->thread->pid_);
}

static int64_t
pid_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
    struct hist_entry *left, struct hist_entry *right)
{
    return left->thread->pid_ - right->thread->pid_;
}

static int64_t
empty_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
      struct hist_entry *left __maybe_unused,
      struct hist_entry *right __maybe_unused)
{
    return 0;
}

static int
node_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
       struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    bool first = true;
    int node;
    int ret = 0;

    c2c_he = container_of(he, struct c2c_hist_entry, he);

    for (node = 0; node < c2c.nodes_cnt; node++) {
        DECLARE_BITMAP(set, c2c.cpus_cnt);

        bitmap_zero(set, c2c.cpus_cnt);
        bitmap_and(set, c2c_he->cpuset, c2c.nodes[node], c2c.cpus_cnt);

        if (!bitmap_weight(set, c2c.cpus_cnt)) {
            if (c2c.node_info == 1) {
                ret = scnprintf(hpp->buf, hpp->size, "%21s", " ");
                advance_hpp(hpp, ret);
            }
            continue;
        }

        if (!first) {
            ret = scnprintf(hpp->buf, hpp->size, " ");
            advance_hpp(hpp, ret);
        }

        switch (c2c.node_info) {
        case 0:
            ret = scnprintf(hpp->buf, hpp->size, "%2d", node);
            advance_hpp(hpp, ret);
            break;
        case 1:
        {
            int num = bitmap_weight(c2c_he->cpuset, c2c.cpus_cnt);
            struct c2c_stats *stats = &c2c_he->node_stats[node];

            ret = scnprintf(hpp->buf, hpp->size, "%2d{%2d ", node, num);
            advance_hpp(hpp, ret);

        #define DISPLAY_HITM(__h)                       \
            if (c2c_he->stats.__h> 0) {                 \
                ret = scnprintf(hpp->buf, hpp->size, "%5.1f%% ",    \
                        percent(stats->__h, c2c_he->stats.__h));\
            } else {                            \
                ret = scnprintf(hpp->buf, hpp->size, "%6s ", "n/a");    \
            }

            switch (c2c.display) {
            case DISPLAY_RMT:
                DISPLAY_HITM(rmt_hitm);
                break;
            case DISPLAY_LCL:
                DISPLAY_HITM(lcl_hitm);
                break;
            case DISPLAY_TOT:
                DISPLAY_HITM(tot_hitm);
            default:
                break;
            }

        #undef DISPLAY_HITM

            advance_hpp(hpp, ret);

            if (c2c_he->stats.store > 0) {
                ret = scnprintf(hpp->buf, hpp->size, "%5.1f%%}",
                        percent(stats->store, c2c_he->stats.store));
            } else {
                ret = scnprintf(hpp->buf, hpp->size, "%6s}", "n/a");
            }

            advance_hpp(hpp, ret);
            break;
        }
        case 2:
            ret = scnprintf(hpp->buf, hpp->size, "%2d{", node);
            advance_hpp(hpp, ret);

            ret = bitmap_scnprintf(set, c2c.cpus_cnt, hpp->buf, hpp->size);
            advance_hpp(hpp, ret);

            ret = scnprintf(hpp->buf, hpp->size, "}");
            advance_hpp(hpp, ret);
            break;
        default:
            break;
        }

        first = false;
    }

    return 0;
}

static int
mean_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
       struct hist_entry *he, double mean)
{
    int width = c2c_width(fmt, hpp, he->hists);
    char buf[10];

    scnprintf(buf, 10, "%6.0f", mean);
    return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
}

#define MEAN_ENTRY(__func, __val)                       \
static int                                  \
__func(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, struct hist_entry *he)   \
{                                       \
    struct c2c_hist_entry *c2c_he;                      \
    c2c_he = container_of(he, struct c2c_hist_entry, he);           \
    return mean_entry(fmt, hpp, he, avg_stats(&c2c_he->cstats.__val));  \
}

MEAN_ENTRY(mean_rmt_entry,  rmt_hitm);
MEAN_ENTRY(mean_lcl_entry,  lcl_hitm);
MEAN_ENTRY(mean_load_entry, load);

static int
cpucnt_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
         struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);
    char buf[10];

    c2c_he = container_of(he, struct c2c_hist_entry, he);

    scnprintf(buf, 10, "%d", bitmap_weight(c2c_he->cpuset, c2c.cpus_cnt));
    return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
}

static int
cl_idx_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
         struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    int width = c2c_width(fmt, hpp, he->hists);
    char buf[10];

    c2c_he = container_of(he, struct c2c_hist_entry, he);

    scnprintf(buf, 10, "%u", c2c_he->cacheline_idx);
    return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
}

static int
cl_idx_empty_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
           struct hist_entry *he)
{
    int width = c2c_width(fmt, hpp, he->hists);

    return scnprintf(hpp->buf, hpp->size, "%*s", width, "");
}

#define HEADER_LOW(__h)         \
    {               \
        .line[1] = {        \
            .text = __h,    \
        },          \
    }

#define HEADER_BOTH(__h0, __h1)     \
    {               \
        .line[0] = {        \
            .text = __h0,   \
        },          \
        .line[1] = {        \
            .text = __h1,   \
        },          \
    }

#define HEADER_SPAN(__h0, __h1, __s)    \
    {               \
        .line[0] = {        \
            .text = __h0,   \
            .span = __s,    \
        },          \
        .line[1] = {        \
            .text = __h1,   \
        },          \
    }

#define HEADER_SPAN_LOW(__h)        \
    {               \
        .line[1] = {        \
            .text = __h,    \
        },          \
    }

static struct c2c_dimension dim_dcacheline = {
    .header     = HEADER_SPAN("--- Cacheline ----", "Address", 2),
    .name       = "dcacheline",
    .cmp        = dcacheline_cmp,
    .entry      = dcacheline_entry,
    .width      = 18,
};

static struct c2c_dimension dim_dcacheline_node = {
    .header     = HEADER_LOW("Node"),
    .name       = "dcacheline_node",
    .cmp        = empty_cmp,
    .entry      = dcacheline_node_entry,
    .width      = 4,
};

static struct c2c_dimension dim_dcacheline_count = {
    .header     = HEADER_LOW("PA cnt"),
    .name       = "dcacheline_count",
    .cmp        = empty_cmp,
    .entry      = dcacheline_node_count,
    .width      = 6,
};

static struct c2c_header header_offset_tui = HEADER_SPAN("-----", "Off", 2);

static struct c2c_dimension dim_offset = {
    .header     = HEADER_SPAN("--- Data address -", "Offset", 2),
    .name       = "offset",
    .cmp        = offset_cmp,
    .entry      = offset_entry,
    .width      = 18,
};

static struct c2c_dimension dim_offset_node = {
    .header     = HEADER_LOW("Node"),
    .name       = "offset_node",
    .cmp        = empty_cmp,
    .entry      = dcacheline_node_entry,
    .width      = 4,
};

static struct c2c_dimension dim_iaddr = {
    .header     = HEADER_LOW("Code address"),
    .name       = "iaddr",
    .cmp        = iaddr_cmp,
    .entry      = iaddr_entry,
    .width      = 18,
};

static struct c2c_dimension dim_tot_hitm = {
    .header     = HEADER_SPAN("----- LLC Load Hitm -----", "Total", 2),
    .name       = "tot_hitm",
    .cmp        = tot_hitm_cmp,
    .entry      = tot_hitm_entry,
    .width      = 7,
};

static struct c2c_dimension dim_lcl_hitm = {
    .header     = HEADER_SPAN_LOW("Lcl"),
    .name       = "lcl_hitm",
    .cmp        = lcl_hitm_cmp,
    .entry      = lcl_hitm_entry,
    .width      = 7,
};

static struct c2c_dimension dim_rmt_hitm = {
    .header     = HEADER_SPAN_LOW("Rmt"),
    .name       = "rmt_hitm",
    .cmp        = rmt_hitm_cmp,
    .entry      = rmt_hitm_entry,
    .width      = 7,
};

static struct c2c_dimension dim_cl_rmt_hitm = {
    .header     = HEADER_SPAN("----- HITM -----", "Rmt", 1),
    .name       = "cl_rmt_hitm",
    .cmp        = rmt_hitm_cmp,
    .entry      = rmt_hitm_entry,
    .width      = 7,
};

static struct c2c_dimension dim_cl_lcl_hitm = {
    .header     = HEADER_SPAN_LOW("Lcl"),
    .name       = "cl_lcl_hitm",
    .cmp        = lcl_hitm_cmp,
    .entry      = lcl_hitm_entry,
    .width      = 7,
};

static struct c2c_dimension dim_stores = {
    .header     = HEADER_SPAN("---- Store Reference ----", "Total", 2),
    .name       = "stores",
    .cmp        = store_cmp,
    .entry      = store_entry,
    .width      = 7,
};

static struct c2c_dimension dim_stores_l1hit = {
    .header     = HEADER_SPAN_LOW("L1Hit"),
    .name       = "stores_l1hit",
    .cmp        = st_l1hit_cmp,
    .entry      = st_l1hit_entry,
    .width      = 7,
};

static struct c2c_dimension dim_stores_l1miss = {
    .header     = HEADER_SPAN_LOW("L1Miss"),
    .name       = "stores_l1miss",
    .cmp        = st_l1miss_cmp,
    .entry      = st_l1miss_entry,
    .width      = 7,
};

static struct c2c_dimension dim_cl_stores_l1hit = {
    .header     = HEADER_SPAN("-- Store Refs --", "L1 Hit", 1),
    .name       = "cl_stores_l1hit",
    .cmp        = st_l1hit_cmp,
    .entry      = st_l1hit_entry,
    .width      = 7,
};

static struct c2c_dimension dim_cl_stores_l1miss = {
    .header     = HEADER_SPAN_LOW("L1 Miss"),
    .name       = "cl_stores_l1miss",
    .cmp        = st_l1miss_cmp,
    .entry      = st_l1miss_entry,
    .width      = 7,
};

static struct c2c_dimension dim_ld_fbhit = {
    .header     = HEADER_SPAN("----- Core Load Hit -----", "FB", 2),
    .name       = "ld_fbhit",
    .cmp        = ld_fbhit_cmp,
    .entry      = ld_fbhit_entry,
    .width      = 7,
};

static struct c2c_dimension dim_ld_l1hit = {
    .header     = HEADER_SPAN_LOW("L1"),
    .name       = "ld_l1hit",
    .cmp        = ld_l1hit_cmp,
    .entry      = ld_l1hit_entry,
    .width      = 7,
};

static struct c2c_dimension dim_ld_l2hit = {
    .header     = HEADER_SPAN_LOW("L2"),
    .name       = "ld_l2hit",
    .cmp        = ld_l2hit_cmp,
    .entry      = ld_l2hit_entry,
    .width      = 7,
};

static struct c2c_dimension dim_ld_llchit = {
    .header     = HEADER_SPAN("-- LLC Load Hit --", "Llc", 1),
    .name       = "ld_lclhit",
    .cmp        = ld_llchit_cmp,
    .entry      = ld_llchit_entry,
    .width      = 8,
};

static struct c2c_dimension dim_ld_rmthit = {
    .header     = HEADER_SPAN_LOW("Rmt"),
    .name       = "ld_rmthit",
    .cmp        = rmt_hit_cmp,
    .entry      = rmt_hit_entry,
    .width      = 8,
};

static struct c2c_dimension dim_ld_llcmiss = {
    .header     = HEADER_BOTH("LLC", "Ld Miss"),
    .name       = "ld_llcmiss",
    .cmp        = ld_llcmiss_cmp,
    .entry      = ld_llcmiss_entry,
    .width      = 7,
};

static struct c2c_dimension dim_tot_recs = {
    .header     = HEADER_BOTH("Total", "records"),
    .name       = "tot_recs",
    .cmp        = tot_recs_cmp,
    .entry      = tot_recs_entry,
    .width      = 7,
};

static struct c2c_dimension dim_tot_loads = {
    .header     = HEADER_BOTH("Total", "Loads"),
    .name       = "tot_loads",
    .cmp        = tot_loads_cmp,
    .entry      = tot_loads_entry,
    .width      = 7,
};

static struct c2c_header percent_hitm_header[] = {
    [DISPLAY_LCL] = HEADER_BOTH("Lcl", "Hitm"),
    [DISPLAY_RMT] = HEADER_BOTH("Rmt", "Hitm"),
    [DISPLAY_TOT] = HEADER_BOTH("Tot", "Hitm"),
};

static struct c2c_dimension dim_percent_hitm = {
    .name       = "percent_hitm",
    .cmp        = percent_hitm_cmp,
    .entry      = percent_hitm_entry,
    .color      = percent_hitm_color,
    .width      = 7,
};

static struct c2c_dimension dim_percent_rmt_hitm = {
    .header     = HEADER_SPAN("----- HITM -----", "Rmt", 1),
    .name       = "percent_rmt_hitm",
    .cmp        = percent_rmt_hitm_cmp,
    .entry      = percent_rmt_hitm_entry,
    .color      = percent_rmt_hitm_color,
    .width      = 7,
};

static struct c2c_dimension dim_percent_lcl_hitm = {
    .header     = HEADER_SPAN_LOW("Lcl"),
    .name       = "percent_lcl_hitm",
    .cmp        = percent_lcl_hitm_cmp,
    .entry      = percent_lcl_hitm_entry,
    .color      = percent_lcl_hitm_color,
    .width      = 7,
};

static struct c2c_dimension dim_percent_stores_l1hit = {
    .header     = HEADER_SPAN("-- Store Refs --", "L1 Hit", 1),
    .name       = "percent_stores_l1hit",
    .cmp        = percent_stores_l1hit_cmp,
    .entry      = percent_stores_l1hit_entry,
    .color      = percent_stores_l1hit_color,
    .width      = 7,
};

static struct c2c_dimension dim_percent_stores_l1miss = {
    .header     = HEADER_SPAN_LOW("L1 Miss"),
    .name       = "percent_stores_l1miss",
    .cmp        = percent_stores_l1miss_cmp,
    .entry      = percent_stores_l1miss_entry,
    .color      = percent_stores_l1miss_color,
    .width      = 7,
};

static struct c2c_dimension dim_dram_lcl = {
    .header     = HEADER_SPAN("--- Load Dram ----", "Lcl", 1),
    .name       = "dram_lcl",
    .cmp        = lcl_dram_cmp,
    .entry      = lcl_dram_entry,
    .width      = 8,
};

static struct c2c_dimension dim_dram_rmt = {
    .header     = HEADER_SPAN_LOW("Rmt"),
    .name       = "dram_rmt",
    .cmp        = rmt_dram_cmp,
    .entry      = rmt_dram_entry,
    .width      = 8,
};

static struct c2c_dimension dim_pid = {
    .header     = HEADER_LOW("Pid"),
    .name       = "pid",
    .cmp        = pid_cmp,
    .entry      = pid_entry,
    .width      = 7,
};

static struct c2c_dimension dim_tid = {
    .header     = HEADER_LOW("Tid"),
    .name       = "tid",
    .se     = &sort_thread,
};

static struct c2c_dimension dim_symbol = {
    .name       = "symbol",
    .se     = &sort_sym,
};

static struct c2c_dimension dim_dso = {
    .header     = HEADER_BOTH("Shared", "Object"),
    .name       = "dso",
    .se     = &sort_dso,
};

static struct c2c_header header_node[3] = {
    HEADER_LOW("Node"),
    HEADER_LOW("Node{cpus %hitms %stores}"),
    HEADER_LOW("Node{cpu list}"),
};

static struct c2c_dimension dim_node = {
    .name       = "node",
    .cmp        = empty_cmp,
    .entry      = node_entry,
    .width      = 4,
};

static struct c2c_dimension dim_mean_rmt = {
    .header     = HEADER_SPAN("---------- cycles ----------", "rmt hitm", 2),
    .name       = "mean_rmt",
    .cmp        = empty_cmp,
    .entry      = mean_rmt_entry,
    .width      = 8,
};

static struct c2c_dimension dim_mean_lcl = {
    .header     = HEADER_SPAN_LOW("lcl hitm"),
    .name       = "mean_lcl",
    .cmp        = empty_cmp,
    .entry      = mean_lcl_entry,
    .width      = 8,
};

static struct c2c_dimension dim_mean_load = {
    .header     = HEADER_SPAN_LOW("load"),
    .name       = "mean_load",
    .cmp        = empty_cmp,
    .entry      = mean_load_entry,
    .width      = 8,
};

static struct c2c_dimension dim_cpucnt = {
    .header     = HEADER_BOTH("cpu", "cnt"),
    .name       = "cpucnt",
    .cmp        = empty_cmp,
    .entry      = cpucnt_entry,
    .width      = 8,
};

static struct c2c_dimension dim_srcline = {
    .name       = "cl_srcline",
    .se     = &sort_srcline,
};

static struct c2c_dimension dim_dcacheline_idx = {
    .header     = HEADER_LOW("Index"),
    .name       = "cl_idx",
    .cmp        = empty_cmp,
    .entry      = cl_idx_entry,
    .width      = 5,
};

static struct c2c_dimension dim_dcacheline_num = {
    .header     = HEADER_LOW("Num"),
    .name       = "cl_num",
    .cmp        = empty_cmp,
    .entry      = cl_idx_entry,
    .width      = 5,
};

static struct c2c_dimension dim_dcacheline_num_empty = {
    .header     = HEADER_LOW("Num"),
    .name       = "cl_num_empty",
    .cmp        = empty_cmp,
    .entry      = cl_idx_empty_entry,
    .width      = 5,
};

static struct c2c_dimension *dimensions[] = {
    &dim_dcacheline,
    &dim_dcacheline_node,
    &dim_dcacheline_count,
    &dim_offset,
    &dim_offset_node,
    &dim_iaddr,
    &dim_tot_hitm,
    &dim_lcl_hitm,
    &dim_rmt_hitm,
    &dim_cl_lcl_hitm,
    &dim_cl_rmt_hitm,
    &dim_stores,
    &dim_stores_l1hit,
    &dim_stores_l1miss,
    &dim_cl_stores_l1hit,
    &dim_cl_stores_l1miss,
    &dim_ld_fbhit,
    &dim_ld_l1hit,
    &dim_ld_l2hit,
    &dim_ld_llchit,
    &dim_ld_rmthit,
    &dim_ld_llcmiss,
    &dim_tot_recs,
    &dim_tot_loads,
    &dim_percent_hitm,
    &dim_percent_rmt_hitm,
    &dim_percent_lcl_hitm,
    &dim_percent_stores_l1hit,
    &dim_percent_stores_l1miss,
    &dim_dram_lcl,
    &dim_dram_rmt,
    &dim_pid,
    &dim_tid,
    &dim_symbol,
    &dim_dso,
    &dim_node,
    &dim_mean_rmt,
    &dim_mean_lcl,
    &dim_mean_load,
    &dim_cpucnt,
    &dim_srcline,
    &dim_dcacheline_idx,
    &dim_dcacheline_num,
    &dim_dcacheline_num_empty,
    NULL,
};

static void fmt_free(struct perf_hpp_fmt *fmt)
{
    struct c2c_fmt *c2c_fmt;

    c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
    free(c2c_fmt);
}

static bool fmt_equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
{
    struct c2c_fmt *c2c_a = container_of(a, struct c2c_fmt, fmt);
    struct c2c_fmt *c2c_b = container_of(b, struct c2c_fmt, fmt);

    return c2c_a->dim == c2c_b->dim;
}

static struct c2c_dimension *get_dimension(const char *name)
{
    unsigned int i;

    for (i = 0; dimensions[i]; i++) {
        struct c2c_dimension *dim = dimensions[i];

        if (!strcmp(dim->name, name))
            return dim;
    };

    return NULL;
}

static int c2c_se_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
            struct hist_entry *he)
{
    struct c2c_fmt *c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
    struct c2c_dimension *dim = c2c_fmt->dim;
    size_t len = fmt->user_len;

    if (!len) {
        len = hists__col_len(he->hists, dim->se->se_width_idx);

        if (dim == &dim_symbol || dim == &dim_srcline)
            len = symbol_width(he->hists, dim->se);
    }

    return dim->se->se_snprintf(he, hpp->buf, hpp->size, len);
}

static int64_t c2c_se_cmp(struct perf_hpp_fmt *fmt,
              struct hist_entry *a, struct hist_entry *b)
{
    struct c2c_fmt *c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
    struct c2c_dimension *dim = c2c_fmt->dim;

    return dim->se->se_cmp(a, b);
}

static int64_t c2c_se_collapse(struct perf_hpp_fmt *fmt,
                   struct hist_entry *a, struct hist_entry *b)
{
    struct c2c_fmt *c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
    struct c2c_dimension *dim = c2c_fmt->dim;
    int64_t (*collapse_fn)(struct hist_entry *, struct hist_entry *);

    collapse_fn = dim->se->se_collapse ?: dim->se->se_cmp;
    return collapse_fn(a, b);
}

static struct c2c_fmt *get_format(const char *name)
{
    struct c2c_dimension *dim = get_dimension(name);
    struct c2c_fmt *c2c_fmt;
    struct perf_hpp_fmt *fmt;

    if (!dim)
        return NULL;

    c2c_fmt = zalloc(sizeof(*c2c_fmt));
    if (!c2c_fmt)
        return NULL;

    c2c_fmt->dim = dim;

    fmt = &c2c_fmt->fmt;
    INIT_LIST_HEAD(&fmt->list);
    INIT_LIST_HEAD(&fmt->sort_list);

    fmt->cmp    = dim->se ? c2c_se_cmp   : dim->cmp;
    fmt->sort   = dim->se ? c2c_se_cmp   : dim->cmp;
    fmt->color  = dim->se ? NULL     : dim->color;
    fmt->entry  = dim->se ? c2c_se_entry : dim->entry;
    fmt->header = c2c_header;
    fmt->width  = c2c_width;
    fmt->collapse   = dim->se ? c2c_se_collapse : dim->cmp;
    fmt->equal  = fmt_equal;
    fmt->free   = fmt_free;

    return c2c_fmt;
}

static int c2c_hists__init_output(struct perf_hpp_list *hpp_list, char *name)
{
    struct c2c_fmt *c2c_fmt = get_format(name);

    if (!c2c_fmt) {
        reset_dimensions();
        return output_field_add(hpp_list, name);
    }

    perf_hpp_list__column_register(hpp_list, &c2c_fmt->fmt);
    return 0;
}

static int c2c_hists__init_sort(struct perf_hpp_list *hpp_list, char *name)
{
    struct c2c_fmt *c2c_fmt = get_format(name);
    struct c2c_dimension *dim;

    if (!c2c_fmt) {
        reset_dimensions();
        return sort_dimension__add(hpp_list, name, NULL, 0);
    }

    dim = c2c_fmt->dim;
    if (dim == &dim_dso)
        hpp_list->dso = 1;

    perf_hpp_list__register_sort_field(hpp_list, &c2c_fmt->fmt);
    return 0;
}

#define PARSE_LIST(_list, _fn)                          \
    do {                                    \
        char *tmp, *tok;                        \
        ret = 0;                            \
                                        \
        if (!_list)                         \
            break;                          \
                                        \
        for (tok = strtok_r((char *)_list, ", ", &tmp);         \
                tok; tok = strtok_r(NULL, ", ", &tmp)) {    \
            ret = _fn(hpp_list, tok);               \
            if (ret == -EINVAL) {                   \
                pr_err("Invalid --fields key: `%s'", tok);  \
                break;                      \
            } else if (ret == -ESRCH) {             \
                pr_err("Unknown --fields key: `%s'", tok);  \
                break;                      \
            }                           \
        }                               \
    } while (0)

static int hpp_list__parse(struct perf_hpp_list *hpp_list,
               const char *output_,
               const char *sort_)
{
    char *output = output_ ? strdup(output_) : NULL;
    char *sort   = sort_   ? strdup(sort_) : NULL;
    int ret;

    PARSE_LIST(output, c2c_hists__init_output);
    PARSE_LIST(sort,   c2c_hists__init_sort);

    /* copy sort keys to output fields */
    perf_hpp__setup_output_field(hpp_list);

    /*
     * We dont need other sorting keys other than those
     * we already specified. It also really slows down
     * the processing a lot with big number of output
     * fields, so switching this off for c2c.
     */

#if 0
    /* and then copy output fields to sort keys */
    perf_hpp__append_sort_keys(&hists->list);
#endif

    free(output);
    free(sort);
    return ret;
}

static int c2c_hists__init(struct c2c_hists *hists,
               const char *sort,
               int nr_header_lines)
{
    __hists__init(&hists->hists, &hists->list);

    /*
     * Initialize only with sort fields, we need to resort
     * later anyway, and that's where we add output fields
     * as well.
     */
    perf_hpp_list__init(&hists->list);

    /* Overload number of header lines.*/
    hists->list.nr_header_lines = nr_header_lines;

    return hpp_list__parse(&hists->list, NULL, sort);
}

static int c2c_hists__reinit(struct c2c_hists *c2c_hists,
                 const char *output,
                 const char *sort)
{
    perf_hpp__reset_output_field(&c2c_hists->list);
    return hpp_list__parse(&c2c_hists->list, output, sort);
}

#define DISPLAY_LINE_LIMIT  0.0005

static bool he__display(struct hist_entry *he, struct c2c_stats *stats)
{
    struct c2c_hist_entry *c2c_he;
    double ld_dist;

    if (c2c.show_all)
        return true;

    c2c_he = container_of(he, struct c2c_hist_entry, he);

#define FILTER_HITM(__h)                        \
    if (stats->__h) {                       \
        ld_dist = ((double)c2c_he->stats.__h / stats->__h); \
        if (ld_dist < DISPLAY_LINE_LIMIT)           \
            he->filtered = HIST_FILTER__C2C;        \
    } else {                            \
        he->filtered = HIST_FILTER__C2C;            \
    }

    switch (c2c.display) {
    case DISPLAY_LCL:
        FILTER_HITM(lcl_hitm);
        break;
    case DISPLAY_RMT:
        FILTER_HITM(rmt_hitm);
        break;
    case DISPLAY_TOT:
        FILTER_HITM(tot_hitm);
    default:
        break;
    };

#undef FILTER_HITM

    return he->filtered == 0;
}

static inline int valid_hitm_or_store(struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    bool has_hitm;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    has_hitm = c2c.display == DISPLAY_TOT ? c2c_he->stats.tot_hitm :
           c2c.display == DISPLAY_LCL ? c2c_he->stats.lcl_hitm :
                        c2c_he->stats.rmt_hitm;
    return has_hitm || c2c_he->stats.store;
}

static void set_node_width(struct c2c_hist_entry *c2c_he, int len)
{
    struct c2c_dimension *dim;

    dim = &c2c.hists == c2c_he->hists ?
          &dim_dcacheline_node : &dim_offset_node;

    if (len > dim->width)
        dim->width = len;
}

static int set_nodestr(struct c2c_hist_entry *c2c_he)
{
    char buf[30];
    int len;

    if (c2c_he->nodestr)
        return 0;

    if (bitmap_weight(c2c_he->nodeset, c2c.nodes_cnt)) {
        len = bitmap_scnprintf(c2c_he->nodeset, c2c.nodes_cnt,
                      buf, sizeof(buf));
    } else {
        len = scnprintf(buf, sizeof(buf), "N/A");
    }

    set_node_width(c2c_he, len);
    c2c_he->nodestr = strdup(buf);
    return c2c_he->nodestr ? 0 : -ENOMEM;
}

static void calc_width(struct c2c_hist_entry *c2c_he)
{
    struct c2c_hists *c2c_hists;

    c2c_hists = container_of(c2c_he->he.hists, struct c2c_hists, hists);
    hists__calc_col_len(&c2c_hists->hists, &c2c_he->he);
    set_nodestr(c2c_he);
}

static int filter_cb(struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;

    c2c_he = container_of(he, struct c2c_hist_entry, he);

    if (c2c.show_src && !he->srcline)
        he->srcline = hist_entry__srcline(he);

    calc_width(c2c_he);

    if (!valid_hitm_or_store(he))
        he->filtered = HIST_FILTER__C2C;

    return 0;
}

static int resort_cl_cb(struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    struct c2c_hists *c2c_hists;
    bool display = he__display(he, &c2c.hitm_stats);

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    c2c_hists = c2c_he->hists;

    if (display && c2c_hists) {
        static unsigned int idx;

        c2c_he->cacheline_idx = idx++;
        calc_width(c2c_he);

        c2c_hists__reinit(c2c_hists, c2c.cl_output, c2c.cl_resort);

        hists__collapse_resort(&c2c_hists->hists, NULL);
        hists__output_resort_cb(&c2c_hists->hists, NULL, filter_cb);
    }

    return 0;
}

static void setup_nodes_header(void)
{
    dim_node.header = header_node[c2c.node_info];
}

static int setup_nodes(struct perf_session *session)
{
    struct numa_node *n;
    unsigned long **nodes;
    int node, cpu;
    int *cpu2node;

    if (c2c.node_info > 2)
        c2c.node_info = 2;

    c2c.nodes_cnt = session->header.env.nr_numa_nodes;
    c2c.cpus_cnt  = session->header.env.nr_cpus_online;

    n = session->header.env.numa_nodes;
    if (!n)
        return -EINVAL;

    nodes = zalloc(sizeof(unsigned long *) * c2c.nodes_cnt);
    if (!nodes)
        return -ENOMEM;

    c2c.nodes = nodes;

    cpu2node = zalloc(sizeof(int) * c2c.cpus_cnt);
    if (!cpu2node)
        return -ENOMEM;

    for (cpu = 0; cpu < c2c.cpus_cnt; cpu++)
        cpu2node[cpu] = -1;

    c2c.cpu2node = cpu2node;

    for (node = 0; node < c2c.nodes_cnt; node++) {
        struct cpu_map *map = n[node].map;
        unsigned long *set;

        set = bitmap_alloc(c2c.cpus_cnt);
        if (!set)
            return -ENOMEM;

        for (cpu = 0; cpu < map->nr; cpu++) {
            set_bit(map->map[cpu], set);

            if (WARN_ONCE(cpu2node[map->map[cpu]] != -1, "node/cpu topology bug"))
                return -EINVAL;

            cpu2node[map->map[cpu]] = node;
        }

        nodes[node] = set;
    }

    setup_nodes_header();
    return 0;
}

#define HAS_HITMS(__h) ((__h)->stats.lcl_hitm || (__h)->stats.rmt_hitm)

static int resort_hitm_cb(struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    c2c_he = container_of(he, struct c2c_hist_entry, he);

    if (HAS_HITMS(c2c_he)) {
        c2c.shared_clines++;
        c2c_add_stats(&c2c.hitm_stats, &c2c_he->stats);
    }

    return 0;
}

static int hists__iterate_cb(struct hists *hists, hists__resort_cb_t cb)
{
    struct rb_node *next = rb_first(&hists->entries);
    int ret = 0;

    while (next) {
        struct hist_entry *he;

        he = rb_entry(next, struct hist_entry, rb_node);
        ret = cb(he);
        if (ret)
            break;
        next = rb_next(&he->rb_node);
    }

    return ret;
}

static void print_c2c__display_stats(FILE *out)
{
    int llc_misses;
    struct c2c_stats *stats = &c2c.hists.stats;

    llc_misses = stats->lcl_dram +
             stats->rmt_dram +
             stats->rmt_hit +
             stats->rmt_hitm;

    fprintf(out, "=================================================\n");
    fprintf(out, "            Trace Event Information              \n");
    fprintf(out, "=================================================\n");
    fprintf(out, "  Total records                     : %10d\n", stats->nr_entries);
    fprintf(out, "  Locked Load/Store Operations      : %10d\n", stats->locks);
    fprintf(out, "  Load Operations                   : %10d\n", stats->load);
    fprintf(out, "  Loads - uncacheable               : %10d\n", stats->ld_uncache);
    fprintf(out, "  Loads - IO                        : %10d\n", stats->ld_io);
    fprintf(out, "  Loads - Miss                      : %10d\n", stats->ld_miss);
    fprintf(out, "  Loads - no mapping                : %10d\n", stats->ld_noadrs);
    fprintf(out, "  Load Fill Buffer Hit              : %10d\n", stats->ld_fbhit);
    fprintf(out, "  Load L1D hit                      : %10d\n", stats->ld_l1hit);
    fprintf(out, "  Load L2D hit                      : %10d\n", stats->ld_l2hit);
    fprintf(out, "  Load LLC hit                      : %10d\n", stats->ld_llchit + stats->lcl_hitm);
    fprintf(out, "  Load Local HITM                   : %10d\n", stats->lcl_hitm);
    fprintf(out, "  Load Remote HITM                  : %10d\n", stats->rmt_hitm);
    fprintf(out, "  Load Remote HIT                   : %10d\n", stats->rmt_hit);
    fprintf(out, "  Load Local DRAM                   : %10d\n", stats->lcl_dram);
    fprintf(out, "  Load Remote DRAM                  : %10d\n", stats->rmt_dram);
    fprintf(out, "  Load MESI State Exclusive         : %10d\n", stats->ld_excl);
    fprintf(out, "  Load MESI State Shared            : %10d\n", stats->ld_shared);
    fprintf(out, "  Load LLC Misses                   : %10d\n", llc_misses);
    fprintf(out, "  LLC Misses to Local DRAM          : %10.1f%%\n", ((double)stats->lcl_dram/(double)llc_misses) * 100.);
    fprintf(out, "  LLC Misses to Remote DRAM         : %10.1f%%\n", ((double)stats->rmt_dram/(double)llc_misses) * 100.);
    fprintf(out, "  LLC Misses to Remote cache (HIT)  : %10.1f%%\n", ((double)stats->rmt_hit /(double)llc_misses) * 100.);
    fprintf(out, "  LLC Misses to Remote cache (HITM) : %10.1f%%\n", ((double)stats->rmt_hitm/(double)llc_misses) * 100.);
    fprintf(out, "  Store Operations                  : %10d\n", stats->store);
    fprintf(out, "  Store - uncacheable               : %10d\n", stats->st_uncache);
    fprintf(out, "  Store - no mapping                : %10d\n", stats->st_noadrs);
    fprintf(out, "  Store L1D Hit                     : %10d\n", stats->st_l1hit);
    fprintf(out, "  Store L1D Miss                    : %10d\n", stats->st_l1miss);
    fprintf(out, "  No Page Map Rejects               : %10d\n", stats->nomap);
    fprintf(out, "  Unable to parse data source       : %10d\n", stats->noparse);
}

static void print_shared_cacheline_info(FILE *out)
{
    struct c2c_stats *stats = &c2c.hitm_stats;
    int hitm_cnt = stats->lcl_hitm + stats->rmt_hitm;

    fprintf(out, "=================================================\n");
    fprintf(out, "    Global Shared Cache Line Event Information   \n");
    fprintf(out, "=================================================\n");
    fprintf(out, "  Total Shared Cache Lines          : %10d\n", c2c.shared_clines);
    fprintf(out, "  Load HITs on shared lines         : %10d\n", stats->load);
    fprintf(out, "  Fill Buffer Hits on shared lines  : %10d\n", stats->ld_fbhit);
    fprintf(out, "  L1D hits on shared lines          : %10d\n", stats->ld_l1hit);
    fprintf(out, "  L2D hits on shared lines          : %10d\n", stats->ld_l2hit);
    fprintf(out, "  LLC hits on shared lines          : %10d\n", stats->ld_llchit + stats->lcl_hitm);
    fprintf(out, "  Locked Access on shared lines     : %10d\n", stats->locks);
    fprintf(out, "  Store HITs on shared lines        : %10d\n", stats->store);
    fprintf(out, "  Store L1D hits on shared lines    : %10d\n", stats->st_l1hit);
    fprintf(out, "  Total Merged records              : %10d\n", hitm_cnt + stats->store);
}

static void print_cacheline(struct c2c_hists *c2c_hists,
                struct hist_entry *he_cl,
                struct perf_hpp_list *hpp_list,
                FILE *out)
{
    char bf[1000];
    struct perf_hpp hpp = {
        .buf            = bf,
        .size           = 1000,
    };
    static bool once;

    if (!once) {
        hists__fprintf_headers(&c2c_hists->hists, out);
        once = true;
    } else {
        fprintf(out, "\n");
    }

    fprintf(out, "  -------------------------------------------------------------\n");
    __hist_entry__snprintf(he_cl, &hpp, hpp_list);
    fprintf(out, "%s\n", bf);
    fprintf(out, "  -------------------------------------------------------------\n");

    hists__fprintf(&c2c_hists->hists, false, 0, 0, 0, out, true);
}

static void print_pareto(FILE *out)
{
    struct perf_hpp_list hpp_list;
    struct rb_node *nd;
    int ret;

    perf_hpp_list__init(&hpp_list);
    ret = hpp_list__parse(&hpp_list,
                "cl_num,"
                "cl_rmt_hitm,"
                "cl_lcl_hitm,"
                "cl_stores_l1hit,"
                "cl_stores_l1miss,"
                "dcacheline",
                NULL);

    if (WARN_ONCE(ret, "failed to setup sort entries\n"))
        return;

    nd = rb_first(&c2c.hists.hists.entries);

    for (; nd; nd = rb_next(nd)) {
        struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
        struct c2c_hist_entry *c2c_he;

        if (he->filtered)
            continue;

        c2c_he = container_of(he, struct c2c_hist_entry, he);
        print_cacheline(c2c_he->hists, he, &hpp_list, out);
    }
}

static void print_c2c_info(FILE *out, struct perf_session *session)
{
    struct perf_evlist *evlist = session->evlist;
    struct perf_evsel *evsel;
    bool first = true;

    fprintf(out, "=================================================\n");
    fprintf(out, "                 c2c details                     \n");
    fprintf(out, "=================================================\n");

    evlist__for_each_entry(evlist, evsel) {
        fprintf(out, "%-36s: %s\n", first ? "  Events" : "",
            perf_evsel__name(evsel));
        first = false;
    }
    fprintf(out, "  Cachelines sort on                : %s HITMs\n",
        display_str[c2c.display]);
    fprintf(out, "  Cacheline data grouping           : %s\n", c2c.cl_sort);
}

static void perf_c2c__hists_fprintf(FILE *out, struct perf_session *session)
{
    setup_pager();

    print_c2c__display_stats(out);
    fprintf(out, "\n");
    print_shared_cacheline_info(out);
    fprintf(out, "\n");
    print_c2c_info(out, session);

    if (c2c.stats_only)
        return;

    fprintf(out, "\n");
    fprintf(out, "=================================================\n");
    fprintf(out, "           Shared Data Cache Line Table          \n");
    fprintf(out, "=================================================\n");
    fprintf(out, "#\n");

    hists__fprintf(&c2c.hists.hists, true, 0, 0, 0, stdout, false);

    fprintf(out, "\n");
    fprintf(out, "=================================================\n");
    fprintf(out, "      Shared Cache Line Distribution Pareto      \n");
    fprintf(out, "=================================================\n");
    fprintf(out, "#\n");

    print_pareto(out);
}

#ifdef HAVE_SLANG_SUPPORT
static void c2c_browser__update_nr_entries(struct hist_browser *hb)
{
    u64 nr_entries = 0;
    struct rb_node *nd = rb_first(&hb->hists->entries);

    while (nd) {
        struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);

        if (!he->filtered)
            nr_entries++;

        nd = rb_next(nd);
    }

    hb->nr_non_filtered_entries = nr_entries;
}

struct c2c_cacheline_browser {
    struct hist_browser  hb;
    struct hist_entry   *he;
};

static int
perf_c2c_cacheline_browser__title(struct hist_browser *browser,
                  char *bf, size_t size)
{
    struct c2c_cacheline_browser *cl_browser;
    struct hist_entry *he;
    uint64_t addr = 0;

    cl_browser = container_of(browser, struct c2c_cacheline_browser, hb);
    he = cl_browser->he;

    if (he->mem_info)
        addr = cl_address(he->mem_info->daddr.addr);

    scnprintf(bf, size, "Cacheline 0x%lx", addr);
    return 0;
}

static struct c2c_cacheline_browser*
c2c_cacheline_browser__new(struct hists *hists, struct hist_entry *he)
{
    struct c2c_cacheline_browser *browser;

    browser = zalloc(sizeof(*browser));
    if (browser) {
        hist_browser__init(&browser->hb, hists);
        browser->hb.c2c_filter  = true;
        browser->hb.title   = perf_c2c_cacheline_browser__title;
        browser->he     = he;
    }

    return browser;
}

static int perf_c2c__browse_cacheline(struct hist_entry *he)
{
    struct c2c_hist_entry *c2c_he;
    struct c2c_hists *c2c_hists;
    struct c2c_cacheline_browser *cl_browser;
    struct hist_browser *browser;
    int key = -1;
    const char help[] =
    " ENTER         Toggle callchains (if present) \n"
    " n             Toggle Node details info \n"
    " s             Toggle full length of symbol and source line columns \n"
    " q             Return back to cacheline list \n";

    /* Display compact version first. */
    c2c.symbol_full = false;

    c2c_he = container_of(he, struct c2c_hist_entry, he);
    c2c_hists = c2c_he->hists;

    cl_browser = c2c_cacheline_browser__new(&c2c_hists->hists, he);
    if (cl_browser == NULL)
        return -1;

    browser = &cl_browser->hb;

    /* reset abort key so that it can get Ctrl-C as a key */
    SLang_reset_tty();
    SLang_init_tty(0, 0, 0);

    c2c_browser__update_nr_entries(browser);

    while (1) {
        key = hist_browser__run(browser, "? - help", true);

        switch (key) {
        case 's':
            c2c.symbol_full = !c2c.symbol_full;
            break;
        case 'n':
            c2c.node_info = (c2c.node_info + 1) % 3;
            setup_nodes_header();
            break;
        case 'q':
            goto out;
        case '?':
            ui_browser__help_window(&browser->b, help);
            break;
        default:
            break;
        }
    }

out:
    free(cl_browser);
    return 0;
}

static int perf_c2c_browser__title(struct hist_browser *browser,
                   char *bf, size_t size)
{
    scnprintf(bf, size,
          "Shared Data Cache Line Table     "
          "(%lu entries, sorted on %s HITMs)",
          browser->nr_non_filtered_entries,
          display_str[c2c.display]);
    return 0;
}

static struct hist_browser*
perf_c2c_browser__new(struct hists *hists)
{
    struct hist_browser *browser = hist_browser__new(hists);

    if (browser) {
        browser->title = perf_c2c_browser__title;
        browser->c2c_filter = true;
    }

    return browser;
}

static int perf_c2c__hists_browse(struct hists *hists)
{
    struct hist_browser *browser;
    int key = -1;
    const char help[] =
    " d             Display cacheline details \n"
    " ENTER         Toggle callchains (if present) \n"
    " q             Quit \n";

    browser = perf_c2c_browser__new(hists);
    if (browser == NULL)
        return -1;

    /* reset abort key so that it can get Ctrl-C as a key */
    SLang_reset_tty();
    SLang_init_tty(0, 0, 0);

    c2c_browser__update_nr_entries(browser);

    while (1) {
        key = hist_browser__run(browser, "? - help", true);

        switch (key) {
        case 'q':
            goto out;
        case 'd':
            perf_c2c__browse_cacheline(browser->he_selection);
            break;
        case '?':
            ui_browser__help_window(&browser->b, help);
            break;
        default:
            break;
        }
    }

out:
    hist_browser__delete(browser);
    return 0;
}

static void perf_c2c_display(struct perf_session *session)
{
    if (use_browser == 0)
        perf_c2c__hists_fprintf(stdout, session);
    else
        perf_c2c__hists_browse(&c2c.hists.hists);
}
#else
static void perf_c2c_display(struct perf_session *session)
{
    use_browser = 0;
    perf_c2c__hists_fprintf(stdout, session);
}
#endif /* HAVE_SLANG_SUPPORT */

static char *fill_line(const char *orig, int len)
{
    int i, j, olen = strlen(orig);
    char *buf;

    buf = zalloc(len + 1);
    if (!buf)
        return NULL;

    j = len / 2 - olen / 2;

    for (i = 0; i < j - 1; i++)
        buf[i] = '-';

    buf[i++] = ' ';

    strcpy(buf + i, orig);

    i += olen;

    buf[i++] = ' ';

    for (; i < len; i++)
        buf[i] = '-';

    return buf;
}

static int ui_quirks(void)
{
    const char *nodestr = "Data address";
    char *buf;

    if (!c2c.use_stdio) {
        dim_offset.width  = 5;
        dim_offset.header = header_offset_tui;
        nodestr = "CL";
    }

    dim_percent_hitm.header = percent_hitm_header[c2c.display];

    /* Fix the zero line for dcacheline column. */
    buf = fill_line("Cacheline", dim_dcacheline.width +
                     dim_dcacheline_node.width +
                     dim_dcacheline_count.width + 4);
    if (!buf)
        return -ENOMEM;

    dim_dcacheline.header.line[0].text = buf;

    /* Fix the zero line for offset column. */
    buf = fill_line(nodestr, dim_offset.width +
                     dim_offset_node.width +
                 dim_dcacheline_count.width + 4);
    if (!buf)
        return -ENOMEM;

    dim_offset.header.line[0].text = buf;

    return 0;
}

#define CALLCHAIN_DEFAULT_OPT  "graph,0.5,caller,function,percent"

const char callchain_help[] = "Display call graph (stack chain/backtrace):\n\n"
                CALLCHAIN_REPORT_HELP
                "\n\t\t\t\tDefault: " CALLCHAIN_DEFAULT_OPT;

static int
parse_callchain_opt(const struct option *opt, const char *arg, int unset)
{
    struct callchain_param *callchain = opt->value;

    callchain->enabled = !unset;
    /*
     * --no-call-graph
     */
    if (unset) {
        symbol_conf.use_callchain = false;
        callchain->mode = CHAIN_NONE;
        return 0;
    }

    return parse_callchain_report_opt(arg);
}

static int setup_callchain(struct perf_evlist *evlist)
{
    u64 sample_type = perf_evlist__combined_sample_type(evlist);
    enum perf_call_graph_mode mode = CALLCHAIN_NONE;

    if ((sample_type & PERF_SAMPLE_REGS_USER) &&
        (sample_type & PERF_SAMPLE_STACK_USER)) {
        mode = CALLCHAIN_DWARF;
        dwarf_callchain_users = true;
    } else if (sample_type & PERF_SAMPLE_BRANCH_STACK)
        mode = CALLCHAIN_LBR;
    else if (sample_type & PERF_SAMPLE_CALLCHAIN)
        mode = CALLCHAIN_FP;

    if (!callchain_param.enabled &&
        callchain_param.mode != CHAIN_NONE &&
        mode != CALLCHAIN_NONE) {
        symbol_conf.use_callchain = true;
        if (callchain_register_param(&callchain_param) < 0) {
            ui__error("Can't register callchain params.\n");
            return -EINVAL;
        }
    }

    callchain_param.record_mode = mode;
    callchain_param.min_percent = 0;
    return 0;
}

static int setup_display(const char *str)
{
    const char *display = str ?: "tot";

    if (!strcmp(display, "tot"))
        c2c.display = DISPLAY_TOT;
    else if (!strcmp(display, "rmt"))
        c2c.display = DISPLAY_RMT;
    else if (!strcmp(display, "lcl"))
        c2c.display = DISPLAY_LCL;
    else {
        pr_err("failed: unknown display type: %s\n", str);
        return -1;
    }

    return 0;
}

#define for_each_token(__tok, __buf, __sep, __tmp)      \
    for (__tok = strtok_r(__buf, __sep, &__tmp); __tok; \
         __tok = strtok_r(NULL,  __sep, &__tmp))

static int build_cl_output(char *cl_sort, bool no_source)
{
    char *tok, *tmp, *buf = strdup(cl_sort);
    bool add_pid   = false;
    bool add_tid   = false;
    bool add_iaddr = false;
    bool add_sym   = false;
    bool add_dso   = false;
    bool add_src   = false;

    if (!buf)
        return -ENOMEM;

    for_each_token(tok, buf, ",", tmp) {
        if (!strcmp(tok, "tid")) {
            add_tid = true;
        } else if (!strcmp(tok, "pid")) {
            add_pid = true;
        } else if (!strcmp(tok, "iaddr")) {
            add_iaddr = true;
            add_sym   = true;
            add_dso   = true;
            add_src   = no_source ? false : true;
        } else if (!strcmp(tok, "dso")) {
            add_dso = true;
        } else if (strcmp(tok, "offset")) {
            pr_err("unrecognized sort token: %s\n", tok);
            return -EINVAL;
        }
    }

    if (asprintf(&c2c.cl_output,
        "%s%s%s%s%s%s%s%s%s%s",
        c2c.use_stdio ? "cl_num_empty," : "",
        "percent_rmt_hitm,"
        "percent_lcl_hitm,"
        "percent_stores_l1hit,"
        "percent_stores_l1miss,"
        "offset,offset_node,dcacheline_count,",
        add_pid   ? "pid," : "",
        add_tid   ? "tid," : "",
        add_iaddr ? "iaddr," : "",
        "mean_rmt,"
        "mean_lcl,"
        "mean_load,"
        "tot_recs,"
        "cpucnt,",
        add_sym ? "symbol," : "",
        add_dso ? "dso," : "",
        add_src ? "cl_srcline," : "",
        "node") < 0)
        return -ENOMEM;

    c2c.show_src = add_src;

    free(buf);
    return 0;
}

static int setup_coalesce(const char *coalesce, bool no_source)
{
    const char *c = coalesce ?: coalesce_default;

    if (asprintf(&c2c.cl_sort, "offset,%s", c) < 0)
        return -ENOMEM;

    if (build_cl_output(c2c.cl_sort, no_source))
        return -1;

    if (asprintf(&c2c.cl_resort, "offset,%s",
             c2c.display == DISPLAY_TOT ?
             "tot_hitm" :
             c2c.display == DISPLAY_RMT ?
             "rmt_hitm,lcl_hitm" :
             "lcl_hitm,rmt_hitm") < 0)
        return -ENOMEM;

    pr_debug("coalesce sort   fields: %s\n", c2c.cl_sort);
    pr_debug("coalesce resort fields: %s\n", c2c.cl_resort);
    pr_debug("coalesce output fields: %s\n", c2c.cl_output);
    return 0;
}

static int perf_c2c__report(int argc, const char **argv)
{
    struct perf_session *session;
    struct ui_progress prog;
    struct perf_data data = {
        .mode = PERF_DATA_MODE_READ,
    };
    char callchain_default_opt[] = CALLCHAIN_DEFAULT_OPT;
    const char *display = NULL;
    const char *coalesce = NULL;
    bool no_source = false;
    const struct option options[] = {
    OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
           "file", "vmlinux pathname"),
    OPT_STRING('i', "input", &input_name, "file",
           "the input file to process"),
    OPT_INCR('N', "node-info", &c2c.node_info,
         "show extra node info in report (repeat for more info)"),
#ifdef HAVE_SLANG_SUPPORT
    OPT_BOOLEAN(0, "stdio", &c2c.use_stdio, "Use the stdio interface"),
#endif
    OPT_BOOLEAN(0, "stats", &c2c.stats_only,
            "Display only statistic tables (implies --stdio)"),
    OPT_BOOLEAN(0, "full-symbols", &c2c.symbol_full,
            "Display full length of symbols"),
    OPT_BOOLEAN(0, "no-source", &no_source,
            "Do not display Source Line column"),
    OPT_BOOLEAN(0, "show-all", &c2c.show_all,
            "Show all captured HITM lines."),
    OPT_CALLBACK_DEFAULT('g', "call-graph", &callchain_param,
                 "print_type,threshold[,print_limit],order,sort_key[,branch],value",
                 callchain_help, &parse_callchain_opt,
                 callchain_default_opt),
    OPT_STRING('d', "display", &display, "Switch HITM output type", "lcl,rmt"),
    OPT_STRING('c', "coalesce", &coalesce, "coalesce fields",
           "coalesce fields: pid,tid,iaddr,dso"),
    OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
    OPT_PARENT(c2c_options),
    OPT_END()
    };
    int err = 0;

    argc = parse_options(argc, argv, options, report_c2c_usage,
                 PARSE_OPT_STOP_AT_NON_OPTION);
    if (argc)
        usage_with_options(report_c2c_usage, options);

    if (c2c.stats_only)
        c2c.use_stdio = true;

    if (!input_name || !strlen(input_name))
        input_name = "perf.data";

    data.file.path = input_name;
    data.force     = symbol_conf.force;

    err = setup_display(display);
    if (err)
        goto out;

    err = setup_coalesce(coalesce, no_source);
    if (err) {
        pr_debug("Failed to initialize hists\n");
        goto out;
    }

    err = c2c_hists__init(&c2c.hists, "dcacheline", 2);
    if (err) {
        pr_debug("Failed to initialize hists\n");
        goto out;
    }

    session = perf_session__new(&data, 0, &c2c.tool);
    if (session == NULL) {
        pr_debug("No memory for session\n");
        goto out;
    }

    err = setup_nodes(session);
    if (err) {
        pr_err("Failed setup nodes\n");
        goto out;
    }

    err = mem2node__init(&c2c.mem2node, &session->header.env);
    if (err)
        goto out_session;

    err = setup_callchain(session->evlist);
    if (err)
        goto out_mem2node;

    if (symbol__init(&session->header.env) < 0)
        goto out_mem2node;

    /* No pipe support at the moment. */
    if (perf_data__is_pipe(session->data)) {
        pr_debug("No pipe support at the moment.\n");
        goto out_mem2node;
    }

    if (c2c.use_stdio)
        use_browser = 0;
    else
        use_browser = 1;

    setup_browser(false);

    err = perf_session__process_events(session);
    if (err) {
        pr_err("failed to process sample\n");
        goto out_mem2node;
    }

    c2c_hists__reinit(&c2c.hists,
            "cl_idx,"
            "dcacheline,"
            "dcacheline_node,"
            "dcacheline_count,"
            "tot_recs,"
            "percent_hitm,"
            "tot_hitm,lcl_hitm,rmt_hitm,"
            "stores,stores_l1hit,stores_l1miss,"
            "dram_lcl,dram_rmt,"
            "ld_llcmiss,"
            "tot_loads,"
            "ld_fbhit,ld_l1hit,ld_l2hit,"
            "ld_lclhit,ld_rmthit",
            c2c.display == DISPLAY_TOT ? "tot_hitm" :
            c2c.display == DISPLAY_LCL ? "lcl_hitm" : "rmt_hitm"
            );

    ui_progress__init(&prog, c2c.hists.hists.nr_entries, "Sorting...");

    hists__collapse_resort(&c2c.hists.hists, NULL);
    hists__output_resort_cb(&c2c.hists.hists, &prog, resort_hitm_cb);
    hists__iterate_cb(&c2c.hists.hists, resort_cl_cb);

    ui_progress__finish();

    if (ui_quirks()) {
        pr_err("failed to setup UI\n");
        goto out_mem2node;
    }

    perf_c2c_display(session);

out_mem2node:
    mem2node__exit(&c2c.mem2node);
out_session:
    perf_session__delete(session);
out:
    return err;
}

static int parse_record_events(const struct option *opt,
                   const char *str, int unset __maybe_unused)
{
    bool *event_set = (bool *) opt->value;

    *event_set = true;
    return perf_mem_events__parse(str);
}


static const char * const __usage_record[] = {
    "perf c2c record [<options>] [<command>]",
    "perf c2c record [<options>] -- <command> [<options>]",
    NULL
};

static const char * const *record_mem_usage = __usage_record;

static int perf_c2c__record(int argc, const char **argv)
{
    int rec_argc, i = 0, j;
    const char **rec_argv;
    int ret;
    bool all_user = false, all_kernel = false;
    bool event_set = false;
    struct option options[] = {
    OPT_CALLBACK('e', "event", &event_set, "event",
             "event selector. Use 'perf mem record -e list' to list available events",
             parse_record_events),
    OPT_BOOLEAN('u', "all-user", &all_user, "collect only user level data"),
    OPT_BOOLEAN('k', "all-kernel", &all_kernel, "collect only kernel level data"),
    OPT_UINTEGER('l', "ldlat", &perf_mem_events__loads_ldlat, "setup mem-loads latency"),
    OPT_PARENT(c2c_options),
    OPT_END()
    };

    if (perf_mem_events__init()) {
        pr_err("failed: memory events not supported\n");
        return -1;
    }

    argc = parse_options(argc, argv, options, record_mem_usage,
                 PARSE_OPT_KEEP_UNKNOWN);

    rec_argc = argc + 11; /* max number of arguments */
    rec_argv = calloc(rec_argc + 1, sizeof(char *));
    if (!rec_argv)
        return -1;

    rec_argv[i++] = "record";

    if (!event_set) {
        perf_mem_events[PERF_MEM_EVENTS__LOAD].record  = true;
        perf_mem_events[PERF_MEM_EVENTS__STORE].record = true;
    }

    if (perf_mem_events[PERF_MEM_EVENTS__LOAD].record)
        rec_argv[i++] = "-W";

    rec_argv[i++] = "-d";
    rec_argv[i++] = "--phys-data";
    rec_argv[i++] = "--sample-cpu";

    for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
        if (!perf_mem_events[j].record)
            continue;

        if (!perf_mem_events[j].supported) {
            pr_err("failed: event '%s' not supported\n",
                   perf_mem_events[j].name);
            free(rec_argv);
            return -1;
        }

        rec_argv[i++] = "-e";
        rec_argv[i++] = perf_mem_events__name(j);
    };

    if (all_user)
        rec_argv[i++] = "--all-user";

    if (all_kernel)
        rec_argv[i++] = "--all-kernel";

    for (j = 0; j < argc; j++, i++)
        rec_argv[i] = argv[j];

    if (verbose > 0) {
        pr_debug("calling: ");

        j = 0;

        while (rec_argv[j]) {
            pr_debug("%s ", rec_argv[j]);
            j++;
        }
        pr_debug("\n");
    }

    ret = cmd_record(i, rec_argv);
    free(rec_argv);
    return ret;
}

int cmd_c2c(int argc, const char **argv)
{
    argc = parse_options(argc, argv, c2c_options, c2c_usage,
                 PARSE_OPT_STOP_AT_NON_OPTION);

    if (!argc)
        usage_with_options(c2c_usage, c2c_options);

    if (!strncmp(argv[0], "rec", 3)) {
        return perf_c2c__record(argc, argv);
    } else if (!strncmp(argv[0], "rep", 3)) {
        return perf_c2c__report(argc, argv);
    } else {
        usage_with_options(c2c_usage, c2c_options);
    }

    return 0;
}