tools/perf/builtin-bench.c

   1 /*
   2  *
   3  * builtin-bench.c
   4  *
   5  * General benchmarking subsystem provided by perf
   6  *
   7  * Copyright (C) 2009, Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
   8  *
   9  */
  10
  11 /*
  12  *
  13  * Available subsystem list:
  14  *  sched ... scheduler and IPC mechanism
  15  *  mem   ... memory access performance
  16  *
  17  */
  18
  19 #include "perf.h"
  20 #include "util/util.h"
  21 #include "util/parse-options.h"
  22 #include "builtin.h"
  23 #include "bench/bench.h"
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 struct bench_suite {
  30         const char *name;
  31         const char *summary;
  32         int (*fn)(int, const char **, const char *);
  33 };
  34
  35 static struct bench_suite sched_suites[] = {
  36         { "messaging",
  37           "Benchmark for scheduler and IPC mechanisms",
  38           bench_sched_messaging },
  39         { "pipe",
  40           "Flood of communication over pipe() between two processes",
  41           bench_sched_pipe      },
  42         { NULL,
  43           NULL,
  44           NULL                  }
  45 };
  46
  47 static struct bench_suite mem_suites[] = {
  48         { "memcpy",
  49           "Simple memory copy in various ways",
  50           bench_mem_memcpy },
  51         { NULL,
  52           NULL,
  53           NULL             }
  54 };
  55
  56 struct bench_subsys {
  57         const char *name;
  58         const char *summary;
  59         struct bench_suite *suites;
  60 };
  61
  62 static struct bench_subsys subsystems[] = {
  63         { "sched",
  64           "scheduler and IPC mechanism",
  65           sched_suites },
  66         { "mem",
  67           "memory access performance",
  68           mem_suites },
  69         { NULL,
  70           NULL,
  71           NULL       }
  72 };
  73
  74 static void dump_suites(int subsys_index)
  75 {
  76         int i;
  77
  78         printf("List of available suites for %s...\n\n",
  79                subsystems[subsys_index].name);
  80
  81         for (i = 0; subsystems[subsys_index].suites[i].name; i++)
  82                 printf("\t%s: %s\n",
  83                        subsystems[subsys_index].suites[i].name,
  84                        subsystems[subsys_index].suites[i].summary);
  85
  86         printf("\n");
  87         return;
  88 }
  89
  90 static char *bench_format_str;
  91 int bench_format = BENCH_FORMAT_DEFAULT;
  92
  93 static const struct option bench_options[] = {
  94         OPT_STRING('f', "format", &bench_format_str, "default",
  95                     "Specify format style"),
  96         OPT_END()
  97 };
  98
  99 static const char * const bench_usage[] = {
 100         "perf bench [<common options>] <subsystem> <suite> [<options>]",
 101         NULL
 102 };
 103
 104 static void print_usage(void)
 105 {
 106         int i;
 107
 108         printf("Usage: \n");
 109         for (i = 0; bench_usage[i]; i++)
 110                 printf("\t%s\n", bench_usage[i]);
 111         printf("\n");
 112
 113         printf("List of available subsystems...\n\n");
 114
 115         for (i = 0; subsystems[i].name; i++)
 116                 printf("\t%s: %s\n",
 117                        subsystems[i].name, subsystems[i].summary);
 118         printf("\n");
 119 }
 120
 121 static int bench_str2int(char *str)
 122 {
 123         if (!str)
 124                 return BENCH_FORMAT_DEFAULT;
 125
 126         if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
 127                 return BENCH_FORMAT_DEFAULT;
 128         else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
 129                 return BENCH_FORMAT_SIMPLE;
 130
 131         return BENCH_FORMAT_UNKNOWN;
 132 }
 133
 134 int cmd_bench(int argc, const char **argv, const char *prefix __used)
 135 {
 136         int i, j, status = 0;
 137
 138         if (argc < 2) {
 139                 /* No subsystem specified. */
 140                 print_usage();
 141                 goto end;
 142         }
 143
 144         argc = parse_options(argc, argv, bench_options, bench_usage,
 145                              PARSE_OPT_STOP_AT_NON_OPTION);
 146
 147         bench_format = bench_str2int(bench_format_str);
 148         if (bench_format == BENCH_FORMAT_UNKNOWN) {
 149                 printf("Unknown format descriptor:%s\n", bench_format_str);
 150                 goto end;
 151         }
 152
 153         if (argc < 1) {
 154                 print_usage();
 155                 goto end;
 156         }
 157
 158         for (i = 0; subsystems[i].name; i++) {
 159                 if (strcmp(subsystems[i].name, argv[0]))
 160                         continue;
 161
 162                 if (argc < 2) {
 163                         /* No suite specified. */
 164                         dump_suites(i);
 165                         goto end;
 166                 }
 167
 168                 for (j = 0; subsystems[i].suites[j].name; j++) {
 169                         if (strcmp(subsystems[i].suites[j].name, argv[1]))
 170                                 continue;
 171
 172                         if (bench_format == BENCH_FORMAT_DEFAULT)
 173                                 printf("# Running %s/%s benchmark...\n",
 174                                        subsystems[i].name,
 175                                        subsystems[i].suites[j].name);
 176                         status = subsystems[i].suites[j].fn(argc - 1,
 177                                                             argv + 1, prefix);
 178                         goto end;
 179                 }
 180
 181                 if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
 182                         dump_suites(i);
 183                         goto end;
 184                 }
 185
 186                 printf("Unknown suite:%s for %s\n", argv[1], argv[0]);
 187                 status = 1;
 188                 goto end;
 189         }
 190
 191         printf("Unknown subsystem:%s\n", argv[0]);
 192         status = 1;
 193
 194 end:
 195         return status;
 196 }