+++ /dev/null
-/*
- * mem-memcpy.c
- *
- * Simple memcpy() and memset() benchmarks
- *
- * Written by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
- */
-
-#include "../perf.h"
-#include "../util/util.h"
-#include "../util/parse-options.h"
-#include "../util/header.h"
-#include "../util/cloexec.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>
-
-#define K 1024
-
-static const char *length_str = "1MB";
-static const char *routine = "all";
-static int iterations = 1;
-static bool use_cycle;
-static int cycle_fd;
-static bool only_prefault;
-static bool no_prefault;
-
-static const struct option options[] = {
- OPT_STRING('l', "length", &length_str, "1MB",
- "Specify length of memory to copy. "
- "Available units: B, KB, MB, GB and TB (upper and lower)"),
- OPT_STRING('r', "routine", &routine, "all",
- "Specify routine to copy, \"all\" runs all available routines"),
- OPT_INTEGER('i', "iterations", &iterations,
- "repeat memcpy() invocation this number of times"),
- OPT_BOOLEAN('c', "cycle", &use_cycle,
- "Use cycles event instead of gettimeofday() for measuring"),
- OPT_BOOLEAN('o', "only-prefault", &only_prefault,
- "Show only the result with page faults before memcpy()"),
- OPT_BOOLEAN('n', "no-prefault", &no_prefault,
- "Show only the result without page faults before memcpy()"),
- OPT_END()
-};
-
-typedef void *(*memcpy_t)(void *, const void *, size_t);
-typedef void *(*memset_t)(void *, int, size_t);
-
-struct routine {
- const char *name;
- const char *desc;
- union {
- memcpy_t memcpy;
- memset_t memset;
- } fn;
-};
-
-struct routine memcpy_routines[] = {
- { .name = "default",
- .desc = "Default memcpy() provided by glibc",
- .fn.memcpy = memcpy },
-
-#ifdef HAVE_ARCH_X86_64_SUPPORT
-# define MEMCPY_FN(_fn, _name, _desc) {.name = _name, .desc = _desc, .fn.memcpy = _fn},
-# include "mem-memcpy-x86-64-asm-def.h"
-# undef MEMCPY_FN
-#endif
-
- { NULL, }
-};
-
-static const char * const bench_mem_memcpy_usage[] = {
- "perf bench mem memcpy <options>",
- NULL
-};
-
-static struct perf_event_attr cycle_attr = {
- .type = PERF_TYPE_HARDWARE,
- .config = PERF_COUNT_HW_CPU_CYCLES
-};
-
-static void init_cycle(void)
-{
- cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, perf_event_open_cloexec_flag());
-
- if (cycle_fd < 0 && errno == ENOSYS)
- die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
- else
- BUG_ON(cycle_fd < 0);
-}
-
-static u64 get_cycle(void)
-{
- int ret;
- u64 clk;
-
- ret = read(cycle_fd, &clk, sizeof(u64));
- BUG_ON(ret != sizeof(u64));
-
- return clk;
-}
-
-static double timeval2double(struct timeval *ts)
-{
- return (double)ts->tv_sec + (double)ts->tv_usec / (double)1000000;
-}
-
-#define print_bps(x) do { \
- if (x < K) \
- printf(" %14lf B/Sec", x); \
- else if (x < K * K) \
- printf(" %14lfd KB/Sec", x / K); \
- else if (x < K * K * K) \
- printf(" %14lf MB/Sec", x / K / K); \
- else \
- printf(" %14lf GB/Sec", x / K / K / K); \
- } while (0)
-
-struct bench_mem_info {
- const struct routine *routines;
- u64 (*do_cycle)(const struct routine *r, size_t len, bool prefault);
- double (*do_gettimeofday)(const struct routine *r, size_t len, bool prefault);
- const char *const *usage;
-};
-
-static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t len, double totallen)
-{
- const struct routine *r = &info->routines[r_idx];
- double result_bps[2];
- u64 result_cycle[2];
- int prefault = no_prefault ? 0 : 1;
-
- result_cycle[0] = result_cycle[1] = 0ULL;
- result_bps[0] = result_bps[1] = 0.0;
-
- printf("Routine %s (%s)\n", r->name, r->desc);
-
- if (bench_format == BENCH_FORMAT_DEFAULT)
- printf("# Copying %s Bytes ...\n\n", length_str);
-
- if (!only_prefault && prefault) {
- /* Show both results: */
- if (use_cycle) {
- result_cycle[0] = info->do_cycle(r, len, false);
- result_cycle[1] = info->do_cycle(r, len, true);
- } else {
- result_bps[0] = info->do_gettimeofday(r, len, false);
- result_bps[1] = info->do_gettimeofday(r, len, true);
- }
- } else {
- if (use_cycle)
- result_cycle[prefault] = info->do_cycle(r, len, only_prefault);
- else
- result_bps[prefault] = info->do_gettimeofday(r, len, only_prefault);
- }
-
- switch (bench_format) {
- case BENCH_FORMAT_DEFAULT:
- if (!only_prefault && prefault) {
- if (use_cycle) {
- printf(" %14lf Cycle/Byte\n",
- (double)result_cycle[0]
- / totallen);
- printf(" %14lf Cycle/Byte (with prefault)\n",
- (double)result_cycle[1]
- / totallen);
- } else {
- print_bps(result_bps[0]);
- printf("\n");
- print_bps(result_bps[1]);
- printf(" (with prefault)\n");
- }
- } else {
- if (use_cycle) {
- printf(" %14lf Cycle/Byte",
- (double)result_cycle[prefault]
- / totallen);
- } else
- print_bps(result_bps[prefault]);
-
- printf("%s\n", only_prefault ? " (with prefault)" : "");
- }
- break;
- case BENCH_FORMAT_SIMPLE:
- if (!only_prefault && prefault) {
- if (use_cycle) {
- printf("%lf %lf\n",
- (double)result_cycle[0] / totallen,
- (double)result_cycle[1] / totallen);
- } else {
- printf("%lf %lf\n",
- result_bps[0], result_bps[1]);
- }
- } else {
- if (use_cycle) {
- printf("%lf\n", (double)result_cycle[prefault]
- / totallen);
- } else
- printf("%lf\n", result_bps[prefault]);
- }
- break;
- default:
- /* Reaching this means there's some disaster: */
- die("unknown format: %d\n", bench_format);
- break;
- }
-}
-
-static int bench_mem_common(int argc, const char **argv, struct bench_mem_info *info)
-{
- int i;
- size_t len;
- double totallen;
-
- argc = parse_options(argc, argv, options, info->usage, 0);
-
- if (no_prefault && only_prefault) {
- fprintf(stderr, "Invalid options: -o and -n are mutually exclusive\n");
- return 1;
- }
-
- if (use_cycle)
- init_cycle();
-
- len = (size_t)perf_atoll((char *)length_str);
- totallen = (double)len * iterations;
-
- if ((s64)len <= 0) {
- fprintf(stderr, "Invalid length:%s\n", length_str);
- return 1;
- }
-
- /* Same as without specifying either of prefault and no-prefault: */
- if (only_prefault && no_prefault)
- only_prefault = no_prefault = false;
-
- if (!strncmp(routine, "all", 3)) {
- for (i = 0; info->routines[i].name; i++)
- __bench_mem_routine(info, i, len, totallen);
- return 0;
- }
-
- for (i = 0; info->routines[i].name; i++) {
- if (!strcmp(info->routines[i].name, routine))
- break;
- }
- if (!info->routines[i].name) {
- printf("Unknown routine:%s\n", routine);
- printf("Available routines...\n");
- for (i = 0; info->routines[i].name; i++) {
- printf("\t%s ... %s\n",
- info->routines[i].name, info->routines[i].desc);
- }
- return 1;
- }
-
- __bench_mem_routine(info, i, len, totallen);
-
- return 0;
-}
-
-static void memcpy_alloc_mem(void **dst, void **src, size_t length)
-{
- *dst = zalloc(length);
- if (!*dst)
- die("memory allocation failed - maybe length is too large?\n");
-
- *src = zalloc(length);
- if (!*src)
- die("memory allocation failed - maybe length is too large?\n");
-
- /* Make sure to always prefault zero pages even if MMAP_THRESH is crossed: */
- memset(*src, 0, length);
-}
-
-static u64 do_memcpy_cycle(const struct routine *r, size_t len, bool prefault)
-{
- u64 cycle_start = 0ULL, cycle_end = 0ULL;
- void *src = NULL, *dst = NULL;
- memcpy_t fn = r->fn.memcpy;
- int i;
-
- memcpy_alloc_mem(&dst, &src, len);
-
- if (prefault)
- fn(dst, src, len);
-
- cycle_start = get_cycle();
- for (i = 0; i < iterations; ++i)
- fn(dst, src, len);
- cycle_end = get_cycle();
-
- free(src);
- free(dst);
- return cycle_end - cycle_start;
-}
-
-static double do_memcpy_gettimeofday(const struct routine *r, size_t len, bool prefault)
-{
- struct timeval tv_start, tv_end, tv_diff;
- memcpy_t fn = r->fn.memcpy;
- void *src = NULL, *dst = NULL;
- int i;
-
- memcpy_alloc_mem(&dst, &src, len);
-
- if (prefault)
- fn(dst, src, len);
-
- BUG_ON(gettimeofday(&tv_start, NULL));
- for (i = 0; i < iterations; ++i)
- fn(dst, src, len);
- BUG_ON(gettimeofday(&tv_end, NULL));
-
- timersub(&tv_end, &tv_start, &tv_diff);
-
- free(src);
- free(dst);
- return (double)(((double)len * iterations) / timeval2double(&tv_diff));
-}
-
-int bench_mem_memcpy(int argc, const char **argv, const char *prefix __maybe_unused)
-{
- struct bench_mem_info info = {
- .routines = memcpy_routines,
- .do_cycle = do_memcpy_cycle,
- .do_gettimeofday = do_memcpy_gettimeofday,
- .usage = bench_mem_memcpy_usage,
- };
-
- return bench_mem_common(argc, argv, &info);
-}
-
-static void memset_alloc_mem(void **dst, size_t length)
-{
- *dst = zalloc(length);
- if (!*dst)
- die("memory allocation failed - maybe length is too large?\n");
-}
-
-static u64 do_memset_cycle(const struct routine *r, size_t len, bool prefault)
-{
- u64 cycle_start = 0ULL, cycle_end = 0ULL;
- memset_t fn = r->fn.memset;
- void *dst = NULL;
- int i;
-
- memset_alloc_mem(&dst, len);
-
- if (prefault)
- fn(dst, -1, len);
-
- cycle_start = get_cycle();
- for (i = 0; i < iterations; ++i)
- fn(dst, i, len);
- cycle_end = get_cycle();
-
- free(dst);
- return cycle_end - cycle_start;
-}
-
-static double do_memset_gettimeofday(const struct routine *r, size_t len,
- bool prefault)
-{
- struct timeval tv_start, tv_end, tv_diff;
- memset_t fn = r->fn.memset;
- void *dst = NULL;
- int i;
-
- memset_alloc_mem(&dst, len);
-
- if (prefault)
- fn(dst, -1, len);
-
- BUG_ON(gettimeofday(&tv_start, NULL));
- for (i = 0; i < iterations; ++i)
- fn(dst, i, len);
- BUG_ON(gettimeofday(&tv_end, NULL));
-
- timersub(&tv_end, &tv_start, &tv_diff);
-
- free(dst);
- return (double)(((double)len * iterations) / timeval2double(&tv_diff));
-}
-
-static const char * const bench_mem_memset_usage[] = {
- "perf bench mem memset <options>",
- NULL
-};
-
-static const struct routine memset_routines[] = {
- { .name = "default",
- .desc = "Default memset() provided by glibc",
- .fn.memset = memset },
-
-#ifdef HAVE_ARCH_X86_64_SUPPORT
-# define MEMSET_FN(_fn, _name, _desc) { .name = _name, .desc = _desc, .fn.memset = _fn },
-# include "mem-memset-x86-64-asm-def.h"
-# undef MEMSET_FN
-#endif
-
- { NULL, }
-};
-
-int bench_mem_memset(int argc, const char **argv, const char *prefix __maybe_unused)
-{
- struct bench_mem_info info = {
- .routines = memset_routines,
- .do_cycle = do_memset_cycle,
- .do_gettimeofday = do_memset_gettimeofday,
- .usage = bench_mem_memset_usage,
- };
-
- return bench_mem_common(argc, argv, &info);
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff