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![Hitoshi Mitake](/assets/img/avatar_default.png)
'perf bench mem memcpy' is a benchmark suite for measuring memcpy() performance. Example on a Intel(R) Core(TM)2 Duo CPU E6850 @ 3.00GHz: | % perf bench mem memcpy -l 1GB | # Running mem/memcpy benchmark... | # Copying 1MB Bytes from 0xb7d98008 to 0xb7e99008 ... | | 726.216412 MB/Sec Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1258471212-30281-1-git-send-email-mitake@dcl.info.waseda.ac.jp> [ v2: updated changelog, clarified history of builtin-bench.c ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
196 lines
3.9 KiB
C
196 lines
3.9 KiB
C
/*
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*
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* builtin-bench.c
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*
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* General benchmarking subsystem provided by perf
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*
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* Copyright (C) 2009, Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
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*
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*/
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/*
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*
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* Available subsystem list:
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* sched ... scheduler and IPC mechanism
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* mem ... memory access performance
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*
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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 "builtin.h"
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#include "bench/bench.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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struct bench_suite {
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const char *name;
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const char *summary;
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int (*fn)(int, const char **, const char *);
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};
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static struct bench_suite sched_suites[] = {
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{ "messaging",
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"Benchmark for scheduler and IPC mechanisms",
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bench_sched_messaging },
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{ "pipe",
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"Flood of communication over pipe() between two processes",
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bench_sched_pipe },
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{ NULL,
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NULL,
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NULL }
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};
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static struct bench_suite mem_suites[] = {
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{ "memcpy",
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"Simple memory copy in various ways",
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bench_mem_memcpy },
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{ NULL,
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NULL,
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NULL }
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};
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struct bench_subsys {
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const char *name;
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const char *summary;
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struct bench_suite *suites;
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};
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static struct bench_subsys subsystems[] = {
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{ "sched",
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"scheduler and IPC mechanism",
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sched_suites },
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{ "mem",
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"memory access performance",
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mem_suites },
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{ NULL,
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NULL,
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NULL }
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};
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static void dump_suites(int subsys_index)
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{
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int i;
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printf("List of available suites for %s...\n\n",
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subsystems[subsys_index].name);
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for (i = 0; subsystems[subsys_index].suites[i].name; i++)
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printf("\t%s: %s\n",
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subsystems[subsys_index].suites[i].name,
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subsystems[subsys_index].suites[i].summary);
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printf("\n");
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return;
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}
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static char *bench_format_str;
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int bench_format = BENCH_FORMAT_DEFAULT;
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static const struct option bench_options[] = {
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OPT_STRING('f', "format", &bench_format_str, "default",
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"Specify format style"),
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OPT_END()
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};
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static const char * const bench_usage[] = {
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"perf bench [<common options>] <subsystem> <suite> [<options>]",
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NULL
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};
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static void print_usage(void)
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{
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int i;
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printf("Usage: \n");
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for (i = 0; bench_usage[i]; i++)
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printf("\t%s\n", bench_usage[i]);
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printf("\n");
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printf("List of available subsystems...\n\n");
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for (i = 0; subsystems[i].name; i++)
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printf("\t%s: %s\n",
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subsystems[i].name, subsystems[i].summary);
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printf("\n");
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}
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static int bench_str2int(char *str)
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{
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if (!str)
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return BENCH_FORMAT_DEFAULT;
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if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
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return BENCH_FORMAT_DEFAULT;
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else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
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return BENCH_FORMAT_SIMPLE;
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return BENCH_FORMAT_UNKNOWN;
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}
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int cmd_bench(int argc, const char **argv, const char *prefix __used)
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{
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int i, j, status = 0;
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if (argc < 2) {
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/* No subsystem specified. */
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print_usage();
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goto end;
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}
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argc = parse_options(argc, argv, bench_options, bench_usage,
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PARSE_OPT_STOP_AT_NON_OPTION);
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bench_format = bench_str2int(bench_format_str);
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if (bench_format == BENCH_FORMAT_UNKNOWN) {
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printf("Unknown format descriptor:%s\n", bench_format_str);
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goto end;
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}
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if (argc < 1) {
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print_usage();
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goto end;
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}
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for (i = 0; subsystems[i].name; i++) {
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if (strcmp(subsystems[i].name, argv[0]))
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continue;
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if (argc < 2) {
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/* No suite specified. */
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dump_suites(i);
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goto end;
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}
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for (j = 0; subsystems[i].suites[j].name; j++) {
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if (strcmp(subsystems[i].suites[j].name, argv[1]))
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continue;
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if (bench_format == BENCH_FORMAT_DEFAULT)
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printf("# Running %s/%s benchmark...\n",
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subsystems[i].name,
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subsystems[i].suites[j].name);
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status = subsystems[i].suites[j].fn(argc - 1,
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argv + 1, prefix);
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goto end;
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}
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if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
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dump_suites(i);
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goto end;
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}
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printf("Unknown suite:%s for %s\n", argv[1], argv[0]);
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status = 1;
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goto end;
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}
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printf("Unknown subsystem:%s\n", argv[0]);
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status = 1;
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end:
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return status;
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}
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