From a69b4f741340a52d0976636a45c9976a883f03a0 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 19 Oct 2015 10:04:25 +0200 Subject: [PATCH] perf bench mem: Fix 'length' vs. 'size' naming confusion So 'perf bench mem memcpy/memset' consistently uses 'len' and 'length' for buffer sizes - while it's really a memory buffer size. (strings have length.) Rename all affected variables. Signed-off-by: Ingo Molnar Cc: David Ahern Cc: Hitoshi Mitake Cc: Jiri Olsa Cc: Linus Torvalds Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1445241870-24854-10-git-send-email-mingo@kernel.org [ Update perf-bench man page ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-bench.txt | 8 +-- tools/perf/bench/mem-functions.c | 92 ++++++++++++------------- 2 files changed, 50 insertions(+), 50 deletions(-) diff --git a/tools/perf/Documentation/perf-bench.txt b/tools/perf/Documentation/perf-bench.txt index 17135ef92d70..bbd27d89b50a 100644 --- a/tools/perf/Documentation/perf-bench.txt +++ b/tools/perf/Documentation/perf-bench.txt @@ -139,8 +139,8 @@ Suite for evaluating performance of simple memory copy in various ways. Options of *memcpy* ^^^^^^^^^^^^^^^^^^^ -l:: ---length:: -Specify length of memory to copy (default: 1MB). +--size:: +Specify size of memory to copy (default: 1MB). Available units are B, KB, MB, GB and TB (case insensitive). -r:: @@ -163,8 +163,8 @@ Suite for evaluating performance of simple memory set in various ways. Options of *memset* ^^^^^^^^^^^^^^^^^^^ -l:: ---length:: -Specify length of memory to set (default: 1MB). +--size:: +Specify size of memory to set (default: 1MB). Available units are B, KB, MB, GB and TB (case insensitive). -r:: diff --git a/tools/perf/bench/mem-functions.c b/tools/perf/bench/mem-functions.c index a76e57f3ab66..1605249d2912 100644 --- a/tools/perf/bench/mem-functions.c +++ b/tools/perf/bench/mem-functions.c @@ -23,15 +23,15 @@ #define K 1024 -static const char *length_str = "1MB"; +static const char *size_str = "1MB"; static const char *routine_str = "all"; static int iterations = 1; static bool use_cycles; static int cycles_fd; static const struct option options[] = { - OPT_STRING('l', "length", &length_str, "1MB", - "Specify length of memory to copy. " + OPT_STRING('l', "size", &size_str, "1MB", + "Specify the size of the memory buffers. " "Available units: B, KB, MB, GB and TB (upper and lower)"), OPT_STRING('r', "routine", &routine_str, "all", "Specify the routine to run, \"all\" runs all available routines"), @@ -117,12 +117,12 @@ static double timeval2double(struct timeval *ts) struct bench_mem_info { const struct routine *routines; - u64 (*do_cycles)(const struct routine *r, size_t len); - double (*do_gettimeofday)(const struct routine *r, size_t len); + u64 (*do_cycles)(const struct routine *r, size_t size); + double (*do_gettimeofday)(const struct routine *r, size_t size); const char *const *usage; }; -static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t len, double totallen) +static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t size, double size_total) { const struct routine *r = &info->routines[r_idx]; double result_bps = 0.0; @@ -131,18 +131,18 @@ static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t l printf("Routine %s (%s)\n", r->name, r->desc); if (bench_format == BENCH_FORMAT_DEFAULT) - printf("# Copying %s Bytes ...\n\n", length_str); + printf("# Copying %s Bytes ...\n\n", size_str); if (use_cycles) { - result_cycles = info->do_cycles(r, len); + result_cycles = info->do_cycles(r, size); } else { - result_bps = info->do_gettimeofday(r, len); + result_bps = info->do_gettimeofday(r, size); } switch (bench_format) { case BENCH_FORMAT_DEFAULT: if (use_cycles) { - printf(" %14lf cycles/Byte\n", (double)result_cycles/totallen); + printf(" %14lf cycles/Byte\n", (double)result_cycles/size_total); } else { print_bps(result_bps); } @@ -150,7 +150,7 @@ static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t l case BENCH_FORMAT_SIMPLE: if (use_cycles) { - printf("%lf\n", (double)result_cycles/totallen); + printf("%lf\n", (double)result_cycles/size_total); } else { printf("%lf\n", result_bps); } @@ -165,25 +165,25 @@ static void __bench_mem_routine(struct bench_mem_info *info, int r_idx, size_t l static int bench_mem_common(int argc, const char **argv, struct bench_mem_info *info) { int i; - size_t len; - double totallen; + size_t size; + double size_total; argc = parse_options(argc, argv, options, info->usage, 0); if (use_cycles) init_cycles(); - len = (size_t)perf_atoll((char *)length_str); - totallen = (double)len * iterations; + size = (size_t)perf_atoll((char *)size_str); + size_total = (double)size * iterations; - if ((s64)len <= 0) { - fprintf(stderr, "Invalid length:%s\n", length_str); + if ((s64)size <= 0) { + fprintf(stderr, "Invalid size:%s\n", size_str); return 1; } if (!strncmp(routine_str, "all", 3)) { for (i = 0; info->routines[i].name; i++) - __bench_mem_routine(info, i, len, totallen); + __bench_mem_routine(info, i, size, size_total); return 0; } @@ -201,43 +201,43 @@ static int bench_mem_common(int argc, const char **argv, struct bench_mem_info * return 1; } - __bench_mem_routine(info, i, len, totallen); + __bench_mem_routine(info, i, size, size_total); return 0; } -static void memcpy_alloc_mem(void **dst, void **src, size_t length) +static void memcpy_alloc_mem(void **dst, void **src, size_t size) { - *dst = zalloc(length); + *dst = zalloc(size); if (!*dst) - die("memory allocation failed - maybe length is too large?\n"); + die("memory allocation failed - maybe size is too large?\n"); - *src = zalloc(length); + *src = zalloc(size); if (!*src) - die("memory allocation failed - maybe length is too large?\n"); + die("memory allocation failed - maybe size is too large?\n"); /* Make sure to always prefault zero pages even if MMAP_THRESH is crossed: */ - memset(*src, 0, length); + memset(*src, 0, size); } -static u64 do_memcpy_cycles(const struct routine *r, size_t len) +static u64 do_memcpy_cycles(const struct routine *r, size_t size) { 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); + memcpy_alloc_mem(&dst, &src, size); /* * We prefault the freshly allocated memory range here, * to not measure page fault overhead: */ - fn(dst, src, len); + fn(dst, src, size); cycle_start = get_cycles(); for (i = 0; i < iterations; ++i) - fn(dst, src, len); + fn(dst, src, size); cycle_end = get_cycles(); free(src); @@ -245,24 +245,24 @@ static u64 do_memcpy_cycles(const struct routine *r, size_t len) return cycle_end - cycle_start; } -static double do_memcpy_gettimeofday(const struct routine *r, size_t len) +static double do_memcpy_gettimeofday(const struct routine *r, size_t size) { 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); + memcpy_alloc_mem(&dst, &src, size); /* * We prefault the freshly allocated memory range here, * to not measure page fault overhead: */ - fn(dst, src, len); + fn(dst, src, size); BUG_ON(gettimeofday(&tv_start, NULL)); for (i = 0; i < iterations; ++i) - fn(dst, src, len); + fn(dst, src, size); BUG_ON(gettimeofday(&tv_end, NULL)); timersub(&tv_end, &tv_start, &tv_diff); @@ -270,7 +270,7 @@ static double do_memcpy_gettimeofday(const struct routine *r, size_t len) free(src); free(dst); - return (double)(((double)len * iterations) / timeval2double(&tv_diff)); + return (double)(((double)size * iterations) / timeval2double(&tv_diff)); } int bench_mem_memcpy(int argc, const char **argv, const char *prefix __maybe_unused) @@ -285,61 +285,61 @@ int bench_mem_memcpy(int argc, const char **argv, const char *prefix __maybe_unu return bench_mem_common(argc, argv, &info); } -static void memset_alloc_mem(void **dst, size_t length) +static void memset_alloc_mem(void **dst, size_t size) { - *dst = zalloc(length); + *dst = zalloc(size); if (!*dst) - die("memory allocation failed - maybe length is too large?\n"); + die("memory allocation failed - maybe size is too large?\n"); } -static u64 do_memset_cycles(const struct routine *r, size_t len) +static u64 do_memset_cycles(const struct routine *r, size_t size) { u64 cycle_start = 0ULL, cycle_end = 0ULL; memset_t fn = r->fn.memset; void *dst = NULL; int i; - memset_alloc_mem(&dst, len); + memset_alloc_mem(&dst, size); /* * We prefault the freshly allocated memory range here, * to not measure page fault overhead: */ - fn(dst, -1, len); + fn(dst, -1, size); cycle_start = get_cycles(); for (i = 0; i < iterations; ++i) - fn(dst, i, len); + fn(dst, i, size); cycle_end = get_cycles(); free(dst); return cycle_end - cycle_start; } -static double do_memset_gettimeofday(const struct routine *r, size_t len) +static double do_memset_gettimeofday(const struct routine *r, size_t size) { struct timeval tv_start, tv_end, tv_diff; memset_t fn = r->fn.memset; void *dst = NULL; int i; - memset_alloc_mem(&dst, len); + memset_alloc_mem(&dst, size); /* * We prefault the freshly allocated memory range here, * to not measure page fault overhead: */ - fn(dst, -1, len); + fn(dst, -1, size); BUG_ON(gettimeofday(&tv_start, NULL)); for (i = 0; i < iterations; ++i) - fn(dst, i, len); + fn(dst, i, size); BUG_ON(gettimeofday(&tv_end, NULL)); timersub(&tv_end, &tv_start, &tv_diff); free(dst); - return (double)(((double)len * iterations) / timeval2double(&tv_diff)); + return (double)(((double)size * iterations) / timeval2double(&tv_diff)); } static const char * const bench_mem_memset_usage[] = { -- 2.20.1