tools/perf/builtin-bench.c

   1 /*
   2  * builtin-bench.c
   3  *
   4  * General benchmarking collections provided by perf
   5  *
   6  * Copyright (C) 2009, Hitoshi Mitake <[email protected]>
   7  */
   8
   9 /*
  10  * Available benchmark collection list:
  11  *
  12  *  sched ... scheduler and IPC performance
  13  *  mem   ... memory access performance
  14  *  numa  ... NUMA scheduling and MM performance
  15  *  futex ... Futex performance
  16  */
  17 #include "perf.h"
  18 #include "util/util.h"
  19 #include <subcmd/parse-options.h>
  20 #include "builtin.h"
  21 #include "bench/bench.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/prctl.h>
  27
  28 typedef int (*bench_fn_t)(int argc, const char **argv);
  29
  30 struct bench {
  31         const char      *name;
  32         const char      *summary;
  33         bench_fn_t      fn;
  34 };
  35
  36 #ifdef HAVE_LIBNUMA_SUPPORT
  37 static struct bench numa_benchmarks[] = {
  38         { "mem",        "Benchmark for NUMA workloads",                 bench_numa              },
  39         { "all",        "Run all NUMA benchmarks",                      NULL                    },
  40         { NULL,         NULL,                                           NULL                    }
  41 };
  42 #endif
  43
  44 static struct bench sched_benchmarks[] = {
  45         { "messaging",  "Benchmark for scheduling and IPC",             bench_sched_messaging   },
  46         { "pipe",       "Benchmark for pipe() between two processes",   bench_sched_pipe        },
  47         { "all",        "Run all scheduler benchmarks",         NULL                    },
  48         { NULL,         NULL,                                           NULL                    }
  49 };
  50
  51 static struct bench mem_benchmarks[] = {
  52         { "memcpy",     "Benchmark for memcpy() functions",             bench_mem_memcpy        },
  53         { "memset",     "Benchmark for memset() functions",             bench_mem_memset        },
  54         { "all",        "Run all memory access benchmarks",             NULL                    },
  55         { NULL,         NULL,                                           NULL                    }
  56 };
  57
  58 static struct bench futex_benchmarks[] = {
  59         { "hash",       "Benchmark for futex hash table",               bench_futex_hash        },
  60         { "wake",       "Benchmark for futex wake calls",               bench_futex_wake        },
  61         { "wake-parallel", "Benchmark for parallel futex wake calls",   bench_futex_wake_parallel },
  62         { "requeue",    "Benchmark for futex requeue calls",            bench_futex_requeue     },
  63         /* pi-futexes */
  64         { "lock-pi",    "Benchmark for futex lock_pi calls",            bench_futex_lock_pi     },
  65         { "all",        "Run all futex benchmarks",                     NULL                    },
  66         { NULL,         NULL,                                           NULL                    }
  67 };
  68
  69 struct collection {
  70         const char      *name;
  71         const char      *summary;
  72         struct bench    *benchmarks;
  73 };
  74
  75 static struct collection collections[] = {
  76         { "sched",      "Scheduler and IPC benchmarks",                 sched_benchmarks        },
  77         { "mem",        "Memory access benchmarks",                     mem_benchmarks          },
  78 #ifdef HAVE_LIBNUMA_SUPPORT
  79         { "numa",       "NUMA scheduling and MM benchmarks",            numa_benchmarks         },
  80 #endif
  81         {"futex",       "Futex stressing benchmarks",                   futex_benchmarks        },
  82         { "all",        "All benchmarks",                               NULL                    },
  83         { NULL,         NULL,                                           NULL                    }
  84 };
  85
  86 /* Iterate over all benchmark collections: */
  87 #define for_each_collection(coll) \
  88         for (coll = collections; coll->name; coll++)
  89
  90 /* Iterate over all benchmarks within a collection: */
  91 #define for_each_bench(coll, bench) \
  92         for (bench = coll->benchmarks; bench && bench->name; bench++)
  93
  94 static void dump_benchmarks(struct collection *coll)
  95 {
  96         struct bench *bench;
  97
  98         printf("\n        # List of available benchmarks for collection '%s':\n\n", coll->name);
  99
 100         for_each_bench(coll, bench)
 101                 printf("%14s: %s\n", bench->name, bench->summary);
 102
 103         printf("\n");
 104 }
 105
 106 static const char *bench_format_str;
 107
 108 /* Output/formatting style, exported to benchmark modules: */
 109 int bench_format = BENCH_FORMAT_DEFAULT;
 110 unsigned int bench_repeat = 10; /* default number of times to repeat the run */
 111
 112 static const struct option bench_options[] = {
 113         OPT_STRING('f', "format", &bench_format_str, "default|simple", "Specify the output formatting style"),
 114         OPT_UINTEGER('r', "repeat",  &bench_repeat,   "Specify amount of times to repeat the run"),
 115         OPT_END()
 116 };
 117
 118 static const char * const bench_usage[] = {
 119         "perf bench [<common options>] <collection> <benchmark> [<options>]",
 120         NULL
 121 };
 122
 123 static void print_usage(void)
 124 {
 125         struct collection *coll;
 126         int i;
 127
 128         printf("Usage: \n");
 129         for (i = 0; bench_usage[i]; i++)
 130                 printf("\t%s\n", bench_usage[i]);
 131         printf("\n");
 132
 133         printf("        # List of all available benchmark collections:\n\n");
 134
 135         for_each_collection(coll)
 136                 printf("%14s: %s\n", coll->name, coll->summary);
 137         printf("\n");
 138 }
 139
 140 static int bench_str2int(const char *str)
 141 {
 142         if (!str)
 143                 return BENCH_FORMAT_DEFAULT;
 144
 145         if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
 146                 return BENCH_FORMAT_DEFAULT;
 147         else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
 148                 return BENCH_FORMAT_SIMPLE;
 149
 150         return BENCH_FORMAT_UNKNOWN;
 151 }
 152
 153 /*
 154  * Run a specific benchmark but first rename the running task's ->comm[]
 155  * to something meaningful:
 156  */
 157 static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t fn,
 158                      int argc, const char **argv)
 159 {
 160         int size;
 161         char *name;
 162         int ret;
 163
 164         size = strlen(coll_name) + 1 + strlen(bench_name) + 1;
 165
 166         name = zalloc(size);
 167         BUG_ON(!name);
 168
 169         scnprintf(name, size, "%s-%s", coll_name, bench_name);
 170
 171         prctl(PR_SET_NAME, name);
 172         argv[0] = name;
 173
 174         ret = fn(argc, argv);
 175
 176         free(name);
 177
 178         return ret;
 179 }
 180
 181 static void run_collection(struct collection *coll)
 182 {
 183         struct bench *bench;
 184         const char *argv[2];
 185
 186         argv[1] = NULL;
 187         /*
 188          * TODO:
 189          *
 190          * Preparing preset parameters for
 191          * embedded, ordinary PC, HPC, etc...
 192          * would be helpful.
 193          */
 194         for_each_bench(coll, bench) {
 195                 if (!bench->fn)
 196                         break;
 197                 printf("# Running %s/%s benchmark...\n", coll->name, bench->name);
 198                 fflush(stdout);
 199
 200                 argv[1] = bench->name;
 201                 run_bench(coll->name, bench->name, bench->fn, 1, argv);
 202                 printf("\n");
 203         }
 204 }
 205
 206 static void run_all_collections(void)
 207 {
 208         struct collection *coll;
 209
 210         for_each_collection(coll)
 211                 run_collection(coll);
 212 }
 213
 214 int cmd_bench(int argc, const char **argv)
 215 {
 216         struct collection *coll;
 217         int ret = 0;
 218
 219         if (argc < 2) {
 220                 /* No collection specified. */
 221                 print_usage();
 222                 goto end;
 223         }
 224
 225         argc = parse_options(argc, argv, bench_options, bench_usage,
 226                              PARSE_OPT_STOP_AT_NON_OPTION);
 227
 228         bench_format = bench_str2int(bench_format_str);
 229         if (bench_format == BENCH_FORMAT_UNKNOWN) {
 230                 printf("Unknown format descriptor: '%s'\n", bench_format_str);
 231                 goto end;
 232         }
 233
 234         if (bench_repeat == 0) {
 235                 printf("Invalid repeat option: Must specify a positive value\n");
 236                 goto end;
 237         }
 238
 239         if (argc < 1) {
 240                 print_usage();
 241                 goto end;
 242         }
 243
 244         if (!strcmp(argv[0], "all")) {
 245                 run_all_collections();
 246                 goto end;
 247         }
 248
 249         for_each_collection(coll) {
 250                 struct bench *bench;
 251
 252                 if (strcmp(coll->name, argv[0]))
 253                         continue;
 254
 255                 if (argc < 2) {
 256                         /* No bench specified. */
 257                         dump_benchmarks(coll);
 258                         goto end;
 259                 }
 260
 261                 if (!strcmp(argv[1], "all")) {
 262                         run_collection(coll);
 263                         goto end;
 264                 }
 265
 266                 for_each_bench(coll, bench) {
 267                         if (strcmp(bench->name, argv[1]))
 268                                 continue;
 269
 270                         if (bench_format == BENCH_FORMAT_DEFAULT)
 271                                 printf("# Running '%s/%s' benchmark:\n", coll->name, bench->name);
 272                         fflush(stdout);
 273                         ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1);
 274                         goto end;
 275                 }
 276
 277                 if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
 278                         dump_benchmarks(coll);
 279                         goto end;
 280                 }
 281
 282                 printf("Unknown benchmark: '%s' for collection '%s'\n", argv[1], argv[0]);
 283                 ret = 1;
 284                 goto end;
 285         }
 286
 287         printf("Unknown collection: '%s'\n", argv[0]);
 288         ret = 1;
 289
 290 end:
 291         return ret;
 292 }