diff options
Diffstat (limited to 'kernel/tools/perf/bench/mem-memcpy.c')
| -rw-r--r-- | kernel/tools/perf/bench/mem-memcpy.c | 434 |
1 files changed, 0 insertions, 434 deletions
diff --git a/kernel/tools/perf/bench/mem-memcpy.c b/kernel/tools/perf/bench/mem-memcpy.c deleted file mode 100644 index d3dfb7936..000000000 --- a/kernel/tools/perf/bench/mem-memcpy.c +++ /dev/null @@ -1,434 +0,0 @@ -/* - * mem-memcpy.c - * - * memcpy: Simple memory copy in various ways - * - * 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 = "default"; -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, "default", - "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, - NULL, - {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 pf (no_prefault ? 0 : 1) - -#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]; - - 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 && !no_prefault) { - /* show both of 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[pf] = info->do_cycle(r, len, only_prefault); - else - result_bps[pf] = info->do_gettimeofday(r, len, only_prefault); - } - - switch (bench_format) { - case BENCH_FORMAT_DEFAULT: - if (!only_prefault && !no_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[pf] - / totallen); - } else - print_bps(result_bps[pf]); - - printf("%s\n", only_prefault ? " (with prefault)" : ""); - } - break; - case BENCH_FORMAT_SIMPLE: - if (!only_prefault && !no_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[pf] - / totallen); - } else - printf("%lf\n", result_bps[pf]); - } - 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, - const char *prefix __maybe_unused, - 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 to 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 replace the 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, prefix, &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 - - { .name = NULL, - .desc = NULL, - .fn.memset = 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, prefix, &info); -} |