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e815e32760
So bench/mem-functions.c has a 'routine' name for the routines parameter string, but a 'length_str' name for the length parameter string. We also have another entity named 'routine': 'struct routine'. This is inconsistent and confusing: rename 'routine' to 'routine_str'. Also fix typos in the --routine help text. Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1445241870-24854-9-git-send-email-mingo@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
375 lines
8.5 KiB
C
375 lines
8.5 KiB
C
/*
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* mem-memcpy.c
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*
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* Simple memcpy() and memset() benchmarks
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*
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* Written by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
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*/
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#include "../perf.h"
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#include "../util/util.h"
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#include "../util/parse-options.h"
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#include "../util/header.h"
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#include "../util/cloexec.h"
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#include "bench.h"
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#include "mem-memcpy-arch.h"
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#include "mem-memset-arch.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <errno.h>
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#define K 1024
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static const char *length_str = "1MB";
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static const char *routine_str = "all";
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static int iterations = 1;
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static bool use_cycles;
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static int cycles_fd;
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static const struct option options[] = {
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OPT_STRING('l', "length", &length_str, "1MB",
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"Specify length of memory to copy. "
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"Available units: B, KB, MB, GB and TB (upper and lower)"),
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OPT_STRING('r', "routine", &routine_str, "all",
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"Specify the routine to run, \"all\" runs all available routines"),
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OPT_INTEGER('i', "iterations", &iterations,
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"repeat memcpy() invocation this number of times"),
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OPT_BOOLEAN('c', "cycles", &use_cycles,
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"Use a cycles event instead of gettimeofday() to measure performance"),
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OPT_END()
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};
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typedef void *(*memcpy_t)(void *, const void *, size_t);
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typedef void *(*memset_t)(void *, int, size_t);
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struct routine {
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const char *name;
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const char *desc;
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union {
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memcpy_t memcpy;
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memset_t memset;
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} fn;
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};
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struct routine memcpy_routines[] = {
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{ .name = "default",
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.desc = "Default memcpy() provided by glibc",
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.fn.memcpy = memcpy },
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#ifdef HAVE_ARCH_X86_64_SUPPORT
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# define MEMCPY_FN(_fn, _name, _desc) {.name = _name, .desc = _desc, .fn.memcpy = _fn},
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# include "mem-memcpy-x86-64-asm-def.h"
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# undef MEMCPY_FN
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#endif
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{ NULL, }
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};
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static const char * const bench_mem_memcpy_usage[] = {
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"perf bench mem memcpy <options>",
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NULL
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};
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static struct perf_event_attr cycle_attr = {
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.type = PERF_TYPE_HARDWARE,
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.config = PERF_COUNT_HW_CPU_CYCLES
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};
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static void init_cycles(void)
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{
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cycles_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, perf_event_open_cloexec_flag());
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if (cycles_fd < 0 && errno == ENOSYS)
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die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
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else
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BUG_ON(cycles_fd < 0);
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}
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static u64 get_cycles(void)
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{
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int ret;
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u64 clk;
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ret = read(cycles_fd, &clk, sizeof(u64));
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BUG_ON(ret != sizeof(u64));
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return clk;
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}
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static double timeval2double(struct timeval *ts)
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{
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return (double)ts->tv_sec + (double)ts->tv_usec / (double)1000000;
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}
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#define print_bps(x) do { \
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if (x < K) \
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printf(" %14lf B/Sec\n", x); \
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else if (x < K * K) \
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printf(" %14lfd KB/Sec\n", x / K); \
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else if (x < K * K * K) \
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printf(" %14lf MB/Sec\n", x / K / K); \
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else \
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printf(" %14lf GB/Sec\n", x / K / K / K); \
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} while (0)
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struct bench_mem_info {
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const struct routine *routines;
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u64 (*do_cycles)(const struct routine *r, size_t len);
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double (*do_gettimeofday)(const struct routine *r, size_t len);
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const char *const *usage;
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};
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static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t len, double totallen)
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{
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const struct routine *r = &info->routines[r_idx];
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double result_bps = 0.0;
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u64 result_cycles = 0;
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printf("Routine %s (%s)\n", r->name, r->desc);
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if (bench_format == BENCH_FORMAT_DEFAULT)
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printf("# Copying %s Bytes ...\n\n", length_str);
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if (use_cycles) {
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result_cycles = info->do_cycles(r, len);
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} else {
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result_bps = info->do_gettimeofday(r, len);
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}
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switch (bench_format) {
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case BENCH_FORMAT_DEFAULT:
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if (use_cycles) {
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printf(" %14lf cycles/Byte\n", (double)result_cycles/totallen);
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} else {
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print_bps(result_bps);
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}
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break;
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case BENCH_FORMAT_SIMPLE:
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if (use_cycles) {
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printf("%lf\n", (double)result_cycles/totallen);
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} else {
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printf("%lf\n", result_bps);
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}
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break;
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default:
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BUG_ON(1);
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break;
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}
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}
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static int bench_mem_common(int argc, const char **argv, struct bench_mem_info *info)
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{
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int i;
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size_t len;
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double totallen;
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argc = parse_options(argc, argv, options, info->usage, 0);
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if (use_cycles)
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init_cycles();
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len = (size_t)perf_atoll((char *)length_str);
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totallen = (double)len * iterations;
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if ((s64)len <= 0) {
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fprintf(stderr, "Invalid length:%s\n", length_str);
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return 1;
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}
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if (!strncmp(routine_str, "all", 3)) {
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for (i = 0; info->routines[i].name; i++)
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__bench_mem_routine(info, i, len, totallen);
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return 0;
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}
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for (i = 0; info->routines[i].name; i++) {
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if (!strcmp(info->routines[i].name, routine_str))
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break;
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}
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if (!info->routines[i].name) {
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printf("Unknown routine: %s\n", routine_str);
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printf("Available routines...\n");
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for (i = 0; info->routines[i].name; i++) {
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printf("\t%s ... %s\n",
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info->routines[i].name, info->routines[i].desc);
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}
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return 1;
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}
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__bench_mem_routine(info, i, len, totallen);
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return 0;
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}
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static void memcpy_alloc_mem(void **dst, void **src, size_t length)
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{
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*dst = zalloc(length);
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if (!*dst)
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die("memory allocation failed - maybe length is too large?\n");
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*src = zalloc(length);
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if (!*src)
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die("memory allocation failed - maybe length is too large?\n");
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/* Make sure to always prefault zero pages even if MMAP_THRESH is crossed: */
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memset(*src, 0, length);
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}
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static u64 do_memcpy_cycles(const struct routine *r, size_t len)
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{
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u64 cycle_start = 0ULL, cycle_end = 0ULL;
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void *src = NULL, *dst = NULL;
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memcpy_t fn = r->fn.memcpy;
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int i;
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memcpy_alloc_mem(&dst, &src, len);
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/*
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* We prefault the freshly allocated memory range here,
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* to not measure page fault overhead:
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*/
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fn(dst, src, len);
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cycle_start = get_cycles();
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for (i = 0; i < iterations; ++i)
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fn(dst, src, len);
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cycle_end = get_cycles();
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free(src);
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free(dst);
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return cycle_end - cycle_start;
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}
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static double do_memcpy_gettimeofday(const struct routine *r, size_t len)
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{
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struct timeval tv_start, tv_end, tv_diff;
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memcpy_t fn = r->fn.memcpy;
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void *src = NULL, *dst = NULL;
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int i;
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memcpy_alloc_mem(&dst, &src, len);
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/*
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* We prefault the freshly allocated memory range here,
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* to not measure page fault overhead:
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*/
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fn(dst, src, len);
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BUG_ON(gettimeofday(&tv_start, NULL));
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for (i = 0; i < iterations; ++i)
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fn(dst, src, len);
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BUG_ON(gettimeofday(&tv_end, NULL));
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timersub(&tv_end, &tv_start, &tv_diff);
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free(src);
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free(dst);
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return (double)(((double)len * iterations) / timeval2double(&tv_diff));
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}
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int bench_mem_memcpy(int argc, const char **argv, const char *prefix __maybe_unused)
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{
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struct bench_mem_info info = {
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.routines = memcpy_routines,
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.do_cycles = do_memcpy_cycles,
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.do_gettimeofday = do_memcpy_gettimeofday,
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.usage = bench_mem_memcpy_usage,
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};
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return bench_mem_common(argc, argv, &info);
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}
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static void memset_alloc_mem(void **dst, size_t length)
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{
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*dst = zalloc(length);
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if (!*dst)
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die("memory allocation failed - maybe length is too large?\n");
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}
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static u64 do_memset_cycles(const struct routine *r, size_t len)
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{
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u64 cycle_start = 0ULL, cycle_end = 0ULL;
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memset_t fn = r->fn.memset;
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void *dst = NULL;
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int i;
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memset_alloc_mem(&dst, len);
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/*
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* We prefault the freshly allocated memory range here,
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* to not measure page fault overhead:
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*/
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fn(dst, -1, len);
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cycle_start = get_cycles();
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for (i = 0; i < iterations; ++i)
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fn(dst, i, len);
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cycle_end = get_cycles();
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free(dst);
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return cycle_end - cycle_start;
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}
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static double do_memset_gettimeofday(const struct routine *r, size_t len)
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{
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struct timeval tv_start, tv_end, tv_diff;
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memset_t fn = r->fn.memset;
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void *dst = NULL;
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int i;
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memset_alloc_mem(&dst, len);
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/*
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* We prefault the freshly allocated memory range here,
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* to not measure page fault overhead:
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*/
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fn(dst, -1, len);
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BUG_ON(gettimeofday(&tv_start, NULL));
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for (i = 0; i < iterations; ++i)
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fn(dst, i, len);
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BUG_ON(gettimeofday(&tv_end, NULL));
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timersub(&tv_end, &tv_start, &tv_diff);
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free(dst);
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return (double)(((double)len * iterations) / timeval2double(&tv_diff));
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}
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static const char * const bench_mem_memset_usage[] = {
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"perf bench mem memset <options>",
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NULL
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};
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static const struct routine memset_routines[] = {
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{ .name = "default",
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.desc = "Default memset() provided by glibc",
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.fn.memset = memset },
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#ifdef HAVE_ARCH_X86_64_SUPPORT
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# define MEMSET_FN(_fn, _name, _desc) { .name = _name, .desc = _desc, .fn.memset = _fn },
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# include "mem-memset-x86-64-asm-def.h"
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# undef MEMSET_FN
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#endif
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{ NULL, }
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};
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int bench_mem_memset(int argc, const char **argv, const char *prefix __maybe_unused)
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{
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struct bench_mem_info info = {
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.routines = memset_routines,
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.do_cycles = do_memset_cycles,
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.do_gettimeofday = do_memset_gettimeofday,
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.usage = bench_mem_memset_usage,
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};
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return bench_mem_common(argc, argv, &info);
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}
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