mem-functions.c File Reference

#include "debug.h"
#include "../perf.h"
#include "../util/util.h"
#include <subcmd/parse-options.h>
#include "../util/header.h"
#include "../util/cloexec.h"
#include "../util/string2.h"
#include "bench.h"
#include "mem-memcpy-arch.h"
#include "mem-memset-arch.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <errno.h>
#include <linux/time64.h>

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Classes
struct	function
struct	bench_mem_info

Macros
#define	K   1024
#define	print_bps(x)

Typedefs
typedef void *(*	memcpy_t) (void *, const void *, size_t)
typedef void *(*	memset_t) (void *, int, size_t)

Functions
static int	init_cycles (void)
static u64	get_cycles (void)
static double	timeval2double (struct timeval *ts)
static void	__bench_mem_function (struct bench_mem_info *info, int r_idx, size_t size, double size_total)
static int	bench_mem_common (int argc, const char **argv, struct bench_mem_info *info)
static u64	do_memcpy_cycles (const struct function *r, size_t size, void *src, void *dst)
static double	do_memcpy_gettimeofday (const struct function *r, size_t size, void *src, void *dst)
int	bench_mem_memcpy (int argc, const char **argv)
static u64	do_memset_cycles (const struct function *r, size_t size, void *src __maybe_unused, void *dst)
static double	do_memset_gettimeofday (const struct function *r, size_t size, void *src __maybe_unused, void *dst)
int	bench_mem_memset (int argc, const char **argv)

Variables
static const char *	size_str = "1MB"
static const char *	function_str = "all"
static int	nr_loops = 1
static bool	use_cycles
static int	cycles_fd
static const struct option	options []
static struct perf_event_attr	cycle_attr
struct function	memcpy_functions []
static const char *const	bench_mem_memcpy_usage []
static const char *const	bench_mem_memset_usage []
static const struct function	memset_functions []

Macro Definition Documentation

K

#define K   1024

Definition at line 28 of file mem-functions.c.

print_bps

#define print_bps

(

x

)

Value:

do {                        \
        if (x < K)                      \
            printf(" %14lf bytes/sec\n", x);        \
        else if (x < K * K)                 \
            printf(" %14lfd KB/sec\n", x / K);      \
        else if (x < K * K * K)                 \
            printf(" %14lf MB/sec\n", x / K / K);       \
        else                            \
            printf(" %14lf GB/sec\n", x / K / K / K);   \
    } while (0)

Definition at line 98 of file mem-functions.c.

Typedef Documentation

memcpy_t

typedef void*(* memcpy_t) (void *, const void *, size_t)

Definition at line 53 of file mem-functions.c.

memset_t

typedef void*(* memset_t) (void *, int, size_t)

Definition at line 54 of file mem-functions.c.

Function Documentation

__bench_mem_function()

static void __bench_mem_function ( struct bench_mem_info *  info, int  r_idx, size_t  size, double  size_total  )

static

Definition at line 117 of file mem-functions.c.

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bench_mem_common()

static int bench_mem_common ( int  argc, const char **  argv, struct bench_mem_info *  info  )

static

Definition at line 175 of file mem-functions.c.

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bench_mem_memcpy()

int bench_mem_memcpy	(	int	argc,
		const char **	argv
	)

Definition at line 289 of file mem-functions.c.

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bench_mem_memset()

int bench_mem_memset	(	int	argc,
		const char **	argv
	)

Definition at line 363 of file mem-functions.c.

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do_memcpy_cycles()

static u64 do_memcpy_cycles ( const struct function *  r, size_t  size, void *  src, void *  dst  )

static

Definition at line 225 of file mem-functions.c.

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do_memcpy_gettimeofday()

static double do_memcpy_gettimeofday ( const struct function *  r, size_t  size, void *  src, void *  dst  )

static

Definition at line 248 of file mem-functions.c.

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do_memset_cycles()

static u64 do_memset_cycles ( const struct function *  r, size_t  size, void *src  __maybe_unused, void *  dst  )

static

Definition at line 302 of file mem-functions.c.

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do_memset_gettimeofday()

static double do_memset_gettimeofday ( const struct function *  r, size_t  size, void *src  __maybe_unused, void *  dst  )

static

Definition at line 322 of file mem-functions.c.

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get_cycles()

static u64 get_cycles ( void  )

static

Definition at line 82 of file mem-functions.c.

init_cycles()

static int init_cycles ( void  )

static

Definition at line 70 of file mem-functions.c.

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timeval2double()

static double timeval2double ( struct timeval *  ts )

static

Definition at line 93 of file mem-functions.c.

Variable Documentation

bench_mem_memcpy_usage

const char* const bench_mem_memcpy_usage[]

static

Initial value:

= {
    "perf bench mem memcpy <options>",
    NULL
}

Definition at line 284 of file mem-functions.c.

bench_mem_memset_usage

const char* const bench_mem_memset_usage[]

static

Initial value:

= {
    "perf bench mem memset <options>",
    NULL
}

Definition at line 344 of file mem-functions.c.

cycle_attr

struct perf_event_attr cycle_attr

static

Initial value:

= {
    .type       = PERF_TYPE_HARDWARE,
    .config     = PERF_COUNT_HW_CPU_CYCLES
}

Definition at line 65 of file mem-functions.c.

cycles_fd

int cycles_fd

static

Definition at line 34 of file mem-functions.c.

function_str

const char* function_str = "all"

static

Definition at line 31 of file mem-functions.c.

memcpy_functions

struct function memcpy_functions[]

Initial value:

= {
    { .name     = "default",
      .desc     = "Default memcpy() provided by glibc",
      .fn.memcpy    = memcpy },







    { .name = NULL, }
}

Definition at line 270 of file mem-functions.c.

memset_functions

const struct function memset_functions[]

static

Initial value:

= {
    { .name     = "default",
      .desc     = "Default memset() provided by glibc",
      .fn.memset    = memset },







    { .name = NULL, }
}

Definition at line 349 of file mem-functions.c.

nr_loops

int nr_loops = 1

static

Definition at line 32 of file mem-functions.c.

options

const struct option options[]

static

Initial value:

= {
    OPT_STRING('s', "size", &size_str, "1MB",
            "Specify the size of the memory buffers. "
            "Available units: B, KB, MB, GB and TB (case insensitive)"),

    OPT_STRING('f', "function", &function_str, "all",
            "Specify the function to run, \"all\" runs all available functions, \"help\" lists them"),

    OPT_INTEGER('l', "nr_loops", &nr_loops,
            "Specify the number of loops to run. (default: 1)"),

    OPT_BOOLEAN('c', "cycles", &use_cycles,
            "Use a cycles event instead of gettimeofday() to measure performance"),


}

Definition at line 36 of file mem-functions.c.

size_str

const char* size_str = "1MB"

static

Definition at line 30 of file mem-functions.c.

use_cycles

bool use_cycles

static

Definition at line 33 of file mem-functions.c.