tools/perf/builtin-bench.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * builtin-bench.c
   4  *
   5  * General benchmarking collections provided by perf
   6  *
   7  * Copyright (C) 2009, Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
   8  */
   9
  10 /*
  11  * Available benchmark collection list:
  12  *
  13  *  sched ... scheduler and IPC performance
  14  *  mem   ... memory access performance
  15  *  numa  ... NUMA scheduling and MM performance
  16  *  futex ... Futex performance
  17  *  epoll ... Event poll performance
  18  */
  19 #include "perf.h"
  20 #include "util/util.h"
  21 #include <subcmd/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 #include <sys/prctl.h>
  29
  30 typedef int (*bench_fn_t)(int argc, const char **argv);
  31
  32 struct bench {
  33         const char      *name;
  34         const char      *summary;
  35         bench_fn_t      fn;
  36 };
  37
  38 #ifdef HAVE_LIBNUMA_SUPPORT
  39 static struct bench numa_benchmarks[] = {
  40         { "mem",        "Benchmark for NUMA workloads",                 bench_numa              },
  41         { "all",        "Run all NUMA benchmarks",                      NULL                    },
  42         { NULL,         NULL,                                           NULL                    }
  43 };
  44 #endif
  45
  46 static struct bench sched_benchmarks[] = {
  47         { "messaging",  "Benchmark for scheduling and IPC",             bench_sched_messaging   },
  48         { "pipe",       "Benchmark for pipe() between two processes",   bench_sched_pipe        },
  49         { "all",        "Run all scheduler benchmarks",         NULL                    },
  50         { NULL,         NULL,                                           NULL                    }
  51 };
  52
  53 static struct bench mem_benchmarks[] = {
  54         { "memcpy",     "Benchmark for memcpy() functions",             bench_mem_memcpy        },
  55         { "memset",     "Benchmark for memset() functions",             bench_mem_memset        },
  56         { "all",        "Run all memory access benchmarks",             NULL                    },
  57         { NULL,         NULL,                                           NULL                    }
  58 };
  59
  60 static struct bench futex_benchmarks[] = {
  61         { "hash",       "Benchmark for futex hash table",               bench_futex_hash        },
  62         { "wake",       "Benchmark for futex wake calls",               bench_futex_wake        },
  63         { "wake-parallel", "Benchmark for parallel futex wake calls",   bench_futex_wake_parallel },
  64         { "requeue",    "Benchmark for futex requeue calls",            bench_futex_requeue     },
  65         /* pi-futexes */
  66         { "lock-pi",    "Benchmark for futex lock_pi calls",            bench_futex_lock_pi     },
  67         { "all",        "Run all futex benchmarks",                     NULL                    },
  68         { NULL,         NULL,                                           NULL                    }
  69 };
  70
  71 #ifdef HAVE_EVENTFD
  72 static struct bench epoll_benchmarks[] = {
  73         { "wait",       "Benchmark epoll concurrent epoll_waits",       bench_epoll_wait        },
  74         { "ctl",        "Benchmark epoll concurrent epoll_ctls",        bench_epoll_ctl         },
  75         { "all",        "Run all futex benchmarks",                     NULL                    },
  76         { NULL,         NULL,                                           NULL                    }
  77 };
  78 #endif // HAVE_EVENTFD
  79
  80 struct collection {
  81         const char      *name;
  82         const char      *summary;
  83         struct bench    *benchmarks;
  84 };
  85
  86 static struct collection collections[] = {
  87         { "sched",      "Scheduler and IPC benchmarks",                 sched_benchmarks        },
  88         { "mem",        "Memory access benchmarks",                     mem_benchmarks          },
  89 #ifdef HAVE_LIBNUMA_SUPPORT
  90         { "numa",       "NUMA scheduling and MM benchmarks",            numa_benchmarks         },
  91 #endif
  92         {"futex",       "Futex stressing benchmarks",                   futex_benchmarks        },
  93 #ifdef HAVE_EVENTFD
  94         {"epoll",       "Epoll stressing benchmarks",                   epoll_benchmarks        },
  95 #endif
  96         { "all",        "All benchmarks",                               NULL                    },
  97         { NULL,         NULL,                                           NULL                    }
  98 };
  99
 100 /* Iterate over all benchmark collections: */
 101 #define for_each_collection(coll) \
 102         for (coll = collections; coll->name; coll++)
 103
 104 /* Iterate over all benchmarks within a collection: */
 105 #define for_each_bench(coll, bench) \
 106         for (bench = coll->benchmarks; bench && bench->name; bench++)
 107
 108 static void dump_benchmarks(struct collection *coll)
 109 {
 110         struct bench *bench;
 111
 112         printf("\n        # List of available benchmarks for collection '%s':\n\n", coll->name);
 113
 114         for_each_bench(coll, bench)
 115                 printf("%14s: %s\n", bench->name, bench->summary);
 116
 117         printf("\n");
 118 }
 119
 120 static const char *bench_format_str;
 121
 122 /* Output/formatting style, exported to benchmark modules: */
 123 int bench_format = BENCH_FORMAT_DEFAULT;
 124 unsigned int bench_repeat = 10; /* default number of times to repeat the run */
 125
 126 static const struct option bench_options[] = {
 127         OPT_STRING('f', "format", &bench_format_str, "default|simple", "Specify the output formatting style"),
 128         OPT_UINTEGER('r', "repeat",  &bench_repeat,   "Specify amount of times to repeat the run"),
 129         OPT_END()
 130 };
 131
 132 static const char * const bench_usage[] = {
 133         "perf bench [<common options>] <collection> <benchmark> [<options>]",
 134         NULL
 135 };
 136
 137 static void print_usage(void)
 138 {
 139         struct collection *coll;
 140         int i;
 141
 142         printf("Usage: \n");
 143         for (i = 0; bench_usage[i]; i++)
 144                 printf("\t%s\n", bench_usage[i]);
 145         printf("\n");
 146
 147         printf("        # List of all available benchmark collections:\n\n");
 148
 149         for_each_collection(coll)
 150                 printf("%14s: %s\n", coll->name, coll->summary);
 151         printf("\n");
 152 }
 153
 154 static int bench_str2int(const char *str)
 155 {
 156         if (!str)
 157                 return BENCH_FORMAT_DEFAULT;
 158
 159         if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
 160                 return BENCH_FORMAT_DEFAULT;
 161         else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
 162                 return BENCH_FORMAT_SIMPLE;
 163
 164         return BENCH_FORMAT_UNKNOWN;
 165 }
 166
 167 /*
 168  * Run a specific benchmark but first rename the running task's ->comm[]
 169  * to something meaningful:
 170  */
 171 static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t fn,
 172                      int argc, const char **argv)
 173 {
 174         int size;
 175         char *name;
 176         int ret;
 177
 178         size = strlen(coll_name) + 1 + strlen(bench_name) + 1;
 179
 180         name = zalloc(size);
 181         BUG_ON(!name);
 182
 183         scnprintf(name, size, "%s-%s", coll_name, bench_name);
 184
 185         prctl(PR_SET_NAME, name);
 186         argv[0] = name;
 187
 188         ret = fn(argc, argv);
 189
 190         free(name);
 191
 192         return ret;
 193 }
 194
 195 static void run_collection(struct collection *coll)
 196 {
 197         struct bench *bench;
 198         const char *argv[2];
 199
 200         argv[1] = NULL;
 201         /*
 202          * TODO:
 203          *
 204          * Preparing preset parameters for
 205          * embedded, ordinary PC, HPC, etc...
 206          * would be helpful.
 207          */
 208         for_each_bench(coll, bench) {
 209                 if (!bench->fn)
 210                         break;
 211                 printf("# Running %s/%s benchmark...\n", coll->name, bench->name);
 212                 fflush(stdout);
 213
 214                 argv[1] = bench->name;
 215                 run_bench(coll->name, bench->name, bench->fn, 1, argv);
 216                 printf("\n");
 217         }
 218 }
 219
 220 static void run_all_collections(void)
 221 {
 222         struct collection *coll;
 223
 224         for_each_collection(coll)
 225                 run_collection(coll);
 226 }
 227
 228 int cmd_bench(int argc, const char **argv)
 229 {
 230         struct collection *coll;
 231         int ret = 0;
 232
 233         if (argc < 2) {
 234                 /* No collection specified. */
 235                 print_usage();
 236                 goto end;
 237         }
 238
 239         argc = parse_options(argc, argv, bench_options, bench_usage,
 240                              PARSE_OPT_STOP_AT_NON_OPTION);
 241
 242         bench_format = bench_str2int(bench_format_str);
 243         if (bench_format == BENCH_FORMAT_UNKNOWN) {
 244                 printf("Unknown format descriptor: '%s'\n", bench_format_str);
 245                 goto end;
 246         }
 247
 248         if (bench_repeat == 0) {
 249                 printf("Invalid repeat option: Must specify a positive value\n");
 250                 goto end;
 251         }
 252
 253         if (argc < 1) {
 254                 print_usage();
 255                 goto end;
 256         }
 257
 258         if (!strcmp(argv[0], "all")) {
 259                 run_all_collections();
 260                 goto end;
 261         }
 262
 263         for_each_collection(coll) {
 264                 struct bench *bench;
 265
 266                 if (strcmp(coll->name, argv[0]))
 267                         continue;
 268
 269                 if (argc < 2) {
 270                         /* No bench specified. */
 271                         dump_benchmarks(coll);
 272                         goto end;
 273                 }
 274
 275                 if (!strcmp(argv[1], "all")) {
 276                         run_collection(coll);
 277                         goto end;
 278                 }
 279
 280                 for_each_bench(coll, bench) {
 281                         if (strcmp(bench->name, argv[1]))
 282                                 continue;
 283
 284                         if (bench_format == BENCH_FORMAT_DEFAULT)
 285                                 printf("# Running '%s/%s' benchmark:\n", coll->name, bench->name);
 286                         fflush(stdout);
 287                         ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1);
 288                         goto end;
 289                 }
 290
 291                 if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
 292                         dump_benchmarks(coll);
 293                         goto end;
 294                 }
 295
 296                 printf("Unknown benchmark: '%s' for collection '%s'\n", argv[1], argv[0]);
 297                 ret = 1;
 298                 goto end;
 299         }
 300
 301         printf("Unknown collection: '%s'\n", argv[0]);
 302         ret = 1;
 303
 304 end:
 305         return ret;
 306 }