release/src-rt-6.x.4708/linux/linux-2.6.36/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 /* sentinel: easy for help */
  36 #define suite_all { "all", "test all suite (pseudo suite)", NULL }
  37
  38 static struct bench_suite sched_suites[] = {
  39         { "messaging",
  40           "Benchmark for scheduler and IPC mechanisms",
  41           bench_sched_messaging },
  42         { "pipe",
  43           "Flood of communication over pipe() between two processes",
  44           bench_sched_pipe      },
  45         suite_all,
  46         { NULL,
  47           NULL,
  48           NULL                  }
  49 };
  50
  51 static struct bench_suite mem_suites[] = {
  52         { "memcpy",
  53           "Simple memory copy in various ways",
  54           bench_mem_memcpy },
  55         suite_all,
  56         { NULL,
  57           NULL,
  58           NULL             }
  59 };
  60
  61 struct bench_subsys {
  62         const char *name;
  63         const char *summary;
  64         struct bench_suite *suites;
  65 };
  66
  67 static struct bench_subsys subsystems[] = {
  68         { "sched",
  69           "scheduler and IPC mechanism",
  70           sched_suites },
  71         { "mem",
  72           "memory access performance",
  73           mem_suites },
  74         { "all",                /* sentinel: easy for help */
  75           "test all subsystem (pseudo subsystem)",
  76           NULL },
  77         { NULL,
  78           NULL,
  79           NULL       }
  80 };
  81
  82 static void dump_suites(int subsys_index)
  83 {
  84         int i;
  85
  86         printf("# List of available suites for %s...\n\n",
  87                subsystems[subsys_index].name);
  88
  89         for (i = 0; subsystems[subsys_index].suites[i].name; i++)
  90                 printf("%14s: %s\n",
  91                        subsystems[subsys_index].suites[i].name,
  92                        subsystems[subsys_index].suites[i].summary);
  93
  94         printf("\n");
  95         return;
  96 }
  97
  98 static const char *bench_format_str;
  99 int bench_format = BENCH_FORMAT_DEFAULT;
 100
 101 static const struct option bench_options[] = {
 102         OPT_STRING('f', "format", &bench_format_str, "default",
 103                     "Specify format style"),
 104         OPT_END()
 105 };
 106
 107 static const char * const bench_usage[] = {
 108         "perf bench [<common options>] <subsystem> <suite> [<options>]",
 109         NULL
 110 };
 111
 112 static void print_usage(void)
 113 {
 114         int i;
 115
 116         printf("Usage: \n");
 117         for (i = 0; bench_usage[i]; i++)
 118                 printf("\t%s\n", bench_usage[i]);
 119         printf("\n");
 120
 121         printf("# List of available subsystems...\n\n");
 122
 123         for (i = 0; subsystems[i].name; i++)
 124                 printf("%14s: %s\n",
 125                        subsystems[i].name, subsystems[i].summary);
 126         printf("\n");
 127 }
 128
 129 static int bench_str2int(const char *str)
 130 {
 131         if (!str)
 132                 return BENCH_FORMAT_DEFAULT;
 133
 134         if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
 135                 return BENCH_FORMAT_DEFAULT;
 136         else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
 137                 return BENCH_FORMAT_SIMPLE;
 138
 139         return BENCH_FORMAT_UNKNOWN;
 140 }
 141
 142 static void all_suite(struct bench_subsys *subsys)        /* FROM HERE */
 143 {
 144         int i;
 145         const char *argv[2];
 146         struct bench_suite *suites = subsys->suites;
 147
 148         argv[1] = NULL;
 149         /*
 150          * TODO:
 151          * preparing preset parameters for
 152          * embedded, ordinary PC, HPC, etc...
 153          * will be helpful
 154          */
 155         for (i = 0; suites[i].fn; i++) {
 156                 printf("# Running %s/%s benchmark...\n",
 157                        subsys->name,
 158                        suites[i].name);
 159
 160                 argv[1] = suites[i].name;
 161                 suites[i].fn(1, argv, NULL);
 162                 printf("\n");
 163         }
 164 }
 165
 166 static void all_subsystem(void)
 167 {
 168         int i;
 169         for (i = 0; subsystems[i].suites; i++)
 170                 all_suite(&subsystems[i]);
 171 }
 172
 173 int cmd_bench(int argc, const char **argv, const char *prefix __used)
 174 {
 175         int i, j, status = 0;
 176
 177         if (argc < 2) {
 178                 /* No subsystem specified. */
 179                 print_usage();
 180                 goto end;
 181         }
 182
 183         argc = parse_options(argc, argv, bench_options, bench_usage,
 184                              PARSE_OPT_STOP_AT_NON_OPTION);
 185
 186         bench_format = bench_str2int(bench_format_str);
 187         if (bench_format == BENCH_FORMAT_UNKNOWN) {
 188                 printf("Unknown format descriptor:%s\n", bench_format_str);
 189                 goto end;
 190         }
 191
 192         if (argc < 1) {
 193                 print_usage();
 194                 goto end;
 195         }
 196
 197         if (!strcmp(argv[0], "all")) {
 198                 all_subsystem();
 199                 goto end;
 200         }
 201
 202         for (i = 0; subsystems[i].name; i++) {
 203                 if (strcmp(subsystems[i].name, argv[0]))
 204                         continue;
 205
 206                 if (argc < 2) {
 207                         /* No suite specified. */
 208                         dump_suites(i);
 209                         goto end;
 210                 }
 211
 212                 if (!strcmp(argv[1], "all")) {
 213                         all_suite(&subsystems[i]);
 214                         goto end;
 215                 }
 216
 217                 for (j = 0; subsystems[i].suites[j].name; j++) {
 218                         if (strcmp(subsystems[i].suites[j].name, argv[1]))
 219                                 continue;
 220
 221                         if (bench_format == BENCH_FORMAT_DEFAULT)
 222                                 printf("# Running %s/%s benchmark...\n",
 223                                        subsystems[i].name,
 224                                        subsystems[i].suites[j].name);
 225                         status = subsystems[i].suites[j].fn(argc - 1,
 226                                                             argv + 1, prefix);
 227                         goto end;
 228                 }
 229
 230                 if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
 231                         dump_suites(i);
 232                         goto end;
 233                 }
 234
 235                 printf("Unknown suite:%s for %s\n", argv[1], argv[0]);
 236                 status = 1;
 237                 goto end;
 238         }
 239
 240         printf("Unknown subsystem:%s\n", argv[0]);
 241         status = 1;
 242
 243 end:
 244         return status;
 245 }