ibsop.c

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// -*-Mode: C++;-*- // technically C99

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#include <stdio.h>

#include "event_info.h"
#include <hpcrun/messages/messages.h>
#include "sample-sources/perf/perf-util.h"
#include "sample-sources/perf/perf_event_open.h"
#include "sample-sources/perf/perf_skid.h"

#include "datacentric.h"

#define IBS_OP_TYPE_FILE "/sys/bus/event_source/devices/ibs_op/type"

#define PERF_IBS_CONFIG   (1ULL<<19)


void
datacentric_hw_handler(perf_mmap_data_t *mmap_data,
                       cct_node_t *datacentric_node,
                       cct_node_t *sample_node)
{}


int 
datacentric_hw_register(sample_source_t *self, event_custom_t *event,
                        struct event_threshold_s *period)
{
  // get the type of ibs op

  FILE *ibs_file = fopen(IBS_OP_TYPE_FILE, "r");
  u32 type = 0;

  if (!ibs_file) {
    EMSG("Cannot open file: %s", IBS_OP_TYPE_FILE);
    return 0;
  }
  fscanf(ibs_file, "%d", &type);
  event_info_t *einfo = (event_info_t *) hpcrun_malloc(sizeof(event_info_t));
  memset(einfo, 0, sizeof(event_info_t));

  einfo->attr.config = PERF_IBS_CONFIG;
  einfo->attr.type   = type;
  einfo->attr.freq   = period->threshold_type == FREQUENCY ? 1 : 0;

  einfo->attr.sample_period  = period->threshold_num;

  u64 sample_type    = PERF_SAMPLE_RAW
                        | PERF_SAMPLE_PERIOD | PERF_SAMPLE_TIME
                        | PERF_SAMPLE_IP     | PERF_SAMPLE_ADDR
                        | PERF_SAMPLE_CPU    | PERF_SAMPLE_TID;

  bool is_period = period->threshold_type == PERIOD;
  perf_util_attr_init(NULL, &einfo->attr, is_period, period->threshold_num, sample_type);
  perf_skid_set_max_precise_ip(&einfo->attr);

  // testing the feasibility;
  int ret = perf_event_open( &einfo->attr,
    THREAD_SELF, CPU_ANY, GROUP_FD, PERF_FLAGS);

  if (ret >= 0) {
    close(ret);
  } else {
    EMSG("Cannot initialize event %x, type: %d", einfo->attr.config, einfo->attr.type);
  }

  einfo->metric_custom = event;

  // ------------------------------------------
  // create metric data centric
  // ------------------------------------------
  int metric = hpcrun_new_metric();
  hpcrun_set_metric_info_and_period(
        metric, "IBS-OP",
        MetricFlags_ValFmt_Int, 1, metric_property_none);

  // ------------------------------------------
  // Register the event to the global list
  // ------------------------------------------
  METHOD_CALL(self, store_event_and_info,
      einfo->attr.config, 1, metric, einfo );

  return 1;
}