diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-bench.txt | 4 | ||||
| -rw-r--r-- | tools/perf/bench/mem-functions.c | 56 |
2 files changed, 30 insertions, 30 deletions
diff --git a/tools/perf/Documentation/perf-bench.txt b/tools/perf/Documentation/perf-bench.txt index 9cb60abe03aa..17135ef92d70 100644 --- a/tools/perf/Documentation/perf-bench.txt +++ b/tools/perf/Documentation/perf-bench.txt @@ -154,7 +154,7 @@ On x86-64, x86-64-unrolled, x86-64-movsq and x86-64-movsb are supported. Repeat memcpy invocation this number of times. -c:: ---cycle:: +--cycles:: Use perf's cpu-cycles event instead of gettimeofday syscall. *memset*:: @@ -178,7 +178,7 @@ On x86-64, x86-64-unrolled, x86-64-stosq and x86-64-stosb are supported. Repeat memset invocation this number of times. -c:: ---cycle:: +--cycles:: Use perf's cpu-cycles event instead of gettimeofday syscall. SUITES FOR 'numa' diff --git a/tools/perf/bench/mem-functions.c b/tools/perf/bench/mem-functions.c index 9c18a4b976b6..6fe8667fbdf2 100644 --- a/tools/perf/bench/mem-functions.c +++ b/tools/perf/bench/mem-functions.c @@ -26,8 +26,8 @@ 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 use_cycles; +static int cycles_fd; static const struct option options[] = { OPT_STRING('l', "length", &length_str, "1MB", @@ -37,8 +37,8 @@ static const struct option options[] = { "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('c', "cycles", &use_cycles, + "Use a cycles event instead of gettimeofday() to measure performance"), OPT_END() }; @@ -78,22 +78,22 @@ static struct perf_event_attr cycle_attr = { .config = PERF_COUNT_HW_CPU_CYCLES }; -static void init_cycle(void) +static void init_cycles(void) { - cycle_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, perf_event_open_cloexec_flag()); + cycles_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, perf_event_open_cloexec_flag()); - if (cycle_fd < 0 && errno == ENOSYS) + if (cycles_fd < 0 && errno == ENOSYS) die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); else - BUG_ON(cycle_fd < 0); + BUG_ON(cycles_fd < 0); } -static u64 get_cycle(void) +static u64 get_cycles(void) { int ret; u64 clk; - ret = read(cycle_fd, &clk, sizeof(u64)); + ret = read(cycles_fd, &clk, sizeof(u64)); BUG_ON(ret != sizeof(u64)); return clk; @@ -117,7 +117,7 @@ static double timeval2double(struct timeval *ts) struct bench_mem_info { const struct routine *routines; - u64 (*do_cycle)(const struct routine *r, size_t len); + u64 (*do_cycles)(const struct routine *r, size_t len); double (*do_gettimeofday)(const struct routine *r, size_t len); const char *const *usage; }; @@ -126,31 +126,31 @@ static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t l { const struct routine *r = &info->routines[r_idx]; double result_bps = 0.0; - u64 result_cycle = 0; + u64 result_cycles = 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 (use_cycle) { - result_cycle = info->do_cycle(r, len); + if (use_cycles) { + result_cycles = info->do_cycles(r, len); } else { result_bps = info->do_gettimeofday(r, len); } switch (bench_format) { case BENCH_FORMAT_DEFAULT: - if (use_cycle) { - printf(" %14lf Cycle/Byte\n", (double)result_cycle/totallen); + if (use_cycles) { + printf(" %14lf cycles/Byte\n", (double)result_cycles/totallen); } else { print_bps(result_bps); } break; case BENCH_FORMAT_SIMPLE: - if (use_cycle) { - printf("%lf\n", (double)result_cycle/totallen); + if (use_cycles) { + printf("%lf\n", (double)result_cycles/totallen); } else { printf("%lf\n", result_bps); } @@ -170,8 +170,8 @@ static int bench_mem_common(int argc, const char **argv, struct bench_mem_info * argc = parse_options(argc, argv, options, info->usage, 0); - if (use_cycle) - init_cycle(); + if (use_cycles) + init_cycles(); len = (size_t)perf_atoll((char *)length_str); totallen = (double)len * iterations; @@ -220,7 +220,7 @@ static void memcpy_alloc_mem(void **dst, void **src, size_t length) memset(*src, 0, length); } -static u64 do_memcpy_cycle(const struct routine *r, size_t len) +static u64 do_memcpy_cycles(const struct routine *r, size_t len) { u64 cycle_start = 0ULL, cycle_end = 0ULL; void *src = NULL, *dst = NULL; @@ -235,10 +235,10 @@ static u64 do_memcpy_cycle(const struct routine *r, size_t len) */ fn(dst, src, len); - cycle_start = get_cycle(); + cycle_start = get_cycles(); for (i = 0; i < iterations; ++i) fn(dst, src, len); - cycle_end = get_cycle(); + cycle_end = get_cycles(); free(src); free(dst); @@ -277,7 +277,7 @@ int bench_mem_memcpy(int argc, const char **argv, const char *prefix __maybe_unu { struct bench_mem_info info = { .routines = memcpy_routines, - .do_cycle = do_memcpy_cycle, + .do_cycles = do_memcpy_cycles, .do_gettimeofday = do_memcpy_gettimeofday, .usage = bench_mem_memcpy_usage, }; @@ -292,7 +292,7 @@ static void memset_alloc_mem(void **dst, size_t length) die("memory allocation failed - maybe length is too large?\n"); } -static u64 do_memset_cycle(const struct routine *r, size_t len) +static u64 do_memset_cycles(const struct routine *r, size_t len) { u64 cycle_start = 0ULL, cycle_end = 0ULL; memset_t fn = r->fn.memset; @@ -307,10 +307,10 @@ static u64 do_memset_cycle(const struct routine *r, size_t len) */ fn(dst, -1, len); - cycle_start = get_cycle(); + cycle_start = get_cycles(); for (i = 0; i < iterations; ++i) fn(dst, i, len); - cycle_end = get_cycle(); + cycle_end = get_cycles(); free(dst); return cycle_end - cycle_start; @@ -365,7 +365,7 @@ int bench_mem_memset(int argc, const char **argv, const char *prefix __maybe_unu { struct bench_mem_info info = { .routines = memset_routines, - .do_cycle = do_memset_cycle, + .do_cycles = do_memset_cycles, .do_gettimeofday = do_memset_gettimeofday, .usage = bench_mem_memset_usage, }; |