diff options
Diffstat (limited to 'ANDROID_3.4.5/tools/perf/bench/mem-memcpy.c')
-rw-r--r-- | ANDROID_3.4.5/tools/perf/bench/mem-memcpy.c | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/ANDROID_3.4.5/tools/perf/bench/mem-memcpy.c b/ANDROID_3.4.5/tools/perf/bench/mem-memcpy.c deleted file mode 100644 index 71557225..00000000 --- a/ANDROID_3.4.5/tools/perf/bench/mem-memcpy.c +++ /dev/null @@ -1,303 +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 "bench.h" -#include "mem-memcpy-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_clock; -static int clock_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 unit: B, MB, GB (upper and lower)"), - OPT_STRING('r', "routine", &routine, "default", - "Specify routine to copy"), - OPT_INTEGER('i', "iterations", &iterations, - "repeat memcpy() invocation this number of times"), - OPT_BOOLEAN('c', "clock", &use_clock, - "Use CPU clock 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); - -struct routine { - const char *name; - const char *desc; - memcpy_t fn; -}; - -struct routine routines[] = { - { "default", - "Default memcpy() provided by glibc", - memcpy }, -#ifdef ARCH_X86_64 - -#define MEMCPY_FN(fn, name, desc) { name, desc, 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 clock_attr = { - .type = PERF_TYPE_HARDWARE, - .config = PERF_COUNT_HW_CPU_CYCLES -}; - -static void init_clock(void) -{ - clock_fd = sys_perf_event_open(&clock_attr, getpid(), -1, -1, 0); - - if (clock_fd < 0 && errno == ENOSYS) - die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); - else - BUG_ON(clock_fd < 0); -} - -static u64 get_clock(void) -{ - int ret; - u64 clk; - - ret = read(clock_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; -} - -static void 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"); -} - -static u64 do_memcpy_clock(memcpy_t fn, size_t len, bool prefault) -{ - u64 clock_start = 0ULL, clock_end = 0ULL; - void *src = NULL, *dst = NULL; - int i; - - alloc_mem(&src, &dst, len); - - if (prefault) - fn(dst, src, len); - - clock_start = get_clock(); - for (i = 0; i < iterations; ++i) - fn(dst, src, len); - clock_end = get_clock(); - - free(src); - free(dst); - return clock_end - clock_start; -} - -static double do_memcpy_gettimeofday(memcpy_t fn, size_t len, bool prefault) -{ - struct timeval tv_start, tv_end, tv_diff; - void *src = NULL, *dst = NULL; - int i; - - alloc_mem(&src, &dst, 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 / timeval2double(&tv_diff)); -} - -#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) - -int bench_mem_memcpy(int argc, const char **argv, - const char *prefix __used) -{ - int i; - size_t len; - double result_bps[2]; - u64 result_clock[2]; - - argc = parse_options(argc, argv, options, - bench_mem_memcpy_usage, 0); - - if (use_clock) - init_clock(); - - len = (size_t)perf_atoll((char *)length_str); - - result_clock[0] = result_clock[1] = 0ULL; - result_bps[0] = result_bps[1] = 0.0; - - 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; - - for (i = 0; routines[i].name; i++) { - if (!strcmp(routines[i].name, routine)) - break; - } - if (!routines[i].name) { - printf("Unknown routine:%s\n", routine); - printf("Available routines...\n"); - for (i = 0; routines[i].name; i++) { - printf("\t%s ... %s\n", - routines[i].name, routines[i].desc); - } - return 1; - } - - 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_clock) { - result_clock[0] = - do_memcpy_clock(routines[i].fn, len, false); - result_clock[1] = - do_memcpy_clock(routines[i].fn, len, true); - } else { - result_bps[0] = - do_memcpy_gettimeofday(routines[i].fn, - len, false); - result_bps[1] = - do_memcpy_gettimeofday(routines[i].fn, - len, true); - } - } else { - if (use_clock) { - result_clock[pf] = - do_memcpy_clock(routines[i].fn, - len, only_prefault); - } else { - result_bps[pf] = - do_memcpy_gettimeofday(routines[i].fn, - len, only_prefault); - } - } - - switch (bench_format) { - case BENCH_FORMAT_DEFAULT: - if (!only_prefault && !no_prefault) { - if (use_clock) { - printf(" %14lf Clock/Byte\n", - (double)result_clock[0] - / (double)len); - printf(" %14lf Clock/Byte (with prefault)\n", - (double)result_clock[1] - / (double)len); - } else { - print_bps(result_bps[0]); - printf("\n"); - print_bps(result_bps[1]); - printf(" (with prefault)\n"); - } - } else { - if (use_clock) { - printf(" %14lf Clock/Byte", - (double)result_clock[pf] - / (double)len); - } 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_clock) { - printf("%lf %lf\n", - (double)result_clock[0] / (double)len, - (double)result_clock[1] / (double)len); - } else { - printf("%lf %lf\n", - result_bps[0], result_bps[1]); - } - } else { - if (use_clock) { - printf("%lf\n", (double)result_clock[pf] - / (double)len); - } else - printf("%lf\n", result_bps[pf]); - } - break; - default: - /* reaching this means there's some disaster: */ - die("unknown format: %d\n", bench_format); - break; - } - - return 0; -} |