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  */
  18 #include "perf.h"
  19 #include "util/util.h"
  20 #include <subcmd/parse-options.h>
  21 #include "builtin.h"
  22 #include "bench/bench.h"
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <sys/prctl.h>
  28
  29 typedef int (*bench_fn_t)(int argc, const char **argv);
  30
  31 struct bench {
  32         const char      *name;
  33         const char      *summary;
  34         bench_fn_t      fn;
  35 };
  36
  37 #ifdef HAVE_LIBNUMA_SUPPORT
  38 static struct bench numa_benchmarks[] = {
  39         { "mem",        "Benchmark for NUMA workloads",                 bench_numa              },
  40         { "all",        "Run all NUMA benchmarks",                      NULL                    },
  41         { NULL,         NULL,                                           NULL                    }
  42 };
  43 #endif
  44
  45 static struct bench sched_benchmarks[] = {
  46         { "messaging",  "Benchmark for scheduling and IPC",             bench_sched_messaging   },
  47         { "pipe",       "Benchmark for pipe() between two processes",   bench_sched_pipe        },
  48         { "all",        "Run all scheduler benchmarks",         NULL                    },
  49         { NULL,         NULL,                                           NULL                    }
  50 };
  51
  52 static struct bench mem_benchmarks[] = {
  53         { "memcpy",     "Benchmark for memcpy() functions",             bench_mem_memcpy        },
  54         { "memset",     "Benchmark for memset() functions",             bench_mem_memset        },
  55         { "all",        "Run all memory access benchmarks",             NULL                    },
  56         { NULL,         NULL,                                           NULL                    }
  57 };
  58
  59 static struct bench futex_benchmarks[] = {
  60         { "hash",       "Benchmark for futex hash table",               bench_futex_hash        },
  61         { "wake",       "Benchmark for futex wake calls",               bench_futex_wake        },
  62         { "wake-parallel", "Benchmark for parallel futex wake calls",   bench_futex_wake_parallel },
  63         { "requeue",    "Benchmark for futex requeue calls",            bench_futex_requeue     },
  64         /* pi-futexes */
  65         { "lock-pi",    "Benchmark for futex lock_pi calls",            bench_futex_lock_pi     },
  66         { "all",        "Run all futex benchmarks",                     NULL                    },
  67         { NULL,         NULL,                                           NULL                    }
  68 };
  69
  70 struct collection {
  71         const char      *name;
  72         const char      *summary;
  73         struct bench    *benchmarks;
  74 };
  75
  76 static struct collection collections[] = {
  77         { "sched",      "Scheduler and IPC benchmarks",                 sched_benchmarks        },
  78         { "mem",        "Memory access benchmarks",                     mem_benchmarks          },
  79 #ifdef HAVE_LIBNUMA_SUPPORT
  80         { "numa",       "NUMA scheduling and MM benchmarks",            numa_benchmarks         },
  81 #endif
  82         {"futex",       "Futex stressing benchmarks",                   futex_benchmarks        },
  83         { "all",        "All benchmarks",                               NULL                    },
  84         { NULL,         NULL,                                           NULL                    }
  85 };
  86
  87 /* Iterate over all benchmark collections: */
  88 #define for_each_collection(coll) \
  89         for (coll = collections; coll->name; coll++)
  90
  91 /* Iterate over all benchmarks within a collection: */
  92 #define for_each_bench(coll, bench) \
  93         for (bench = coll->benchmarks; bench && bench->name; bench++)
  94
  95 static void dump_benchmarks(struct collection *coll)
  96 {
  97         struct bench *bench;
  98
  99         printf("\n        # List of available benchmarks for collection '%s':\n\n", coll->name);
 100
 101         for_each_bench(coll, bench)
 102                 printf("%14s: %s\n", bench->name, bench->summary);
 103
 104         printf("\n");
 105 }
 106
 107 static const char *bench_format_str;
 108
 109 /* Output/formatting style, exported to benchmark modules: */
 110 int bench_format = BENCH_FORMAT_DEFAULT;
 111 unsigned int bench_repeat = 10; /* default number of times to repeat the run */
 112
 113 static const struct option bench_options[] = {
 114         OPT_STRING('f', "format", &bench_format_str, "default|simple", "Specify the output formatting style"),
 115         OPT_UINTEGER('r', "repeat",  &bench_repeat,   "Specify amount of times to repeat the run"),
 116         OPT_END()
 117 };
 118
 119 static const char * const bench_usage[] = {
 120         "perf bench [<common options>] <collection> <benchmark> [<options>]",
 121         NULL
 122 };
 123
 124 static void print_usage(void)
 125 {
 126         struct collection *coll;
 127         int i;
 128
 129         printf("Usage: \n");
 130         for (i = 0; bench_usage[i]; i++)
 131                 printf("\t%s\n", bench_usage[i]);
 132         printf("\n");
 133
 134         printf("        # List of all available benchmark collections:\n\n");
 135
 136         for_each_collection(coll)
 137                 printf("%14s: %s\n", coll->name, coll->summary);
 138         printf("\n");
 139 }
 140
 141 static int bench_str2int(const char *str)
 142 {
 143         if (!str)
 144                 return BENCH_FORMAT_DEFAULT;
 145
 146         if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
 147                 return BENCH_FORMAT_DEFAULT;
 148         else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
 149                 return BENCH_FORMAT_SIMPLE;
 150
 151         return BENCH_FORMAT_UNKNOWN;
 152 }
 153
 154 /*
 155  * Run a specific benchmark but first rename the running task's ->comm[]
 156  * to something meaningful:
 157  */
 158 static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t fn,
 159                      int argc, const char **argv)
 160 {
 161         int size;
 162         char *name;
 163         int ret;
 164
 165         size = strlen(coll_name) + 1 + strlen(bench_name) + 1;
 166
 167         name = zalloc(size);
 168         BUG_ON(!name);
 169
 170         scnprintf(name, size, "%s-%s", coll_name, bench_name);
 171
 172         prctl(PR_SET_NAME, name);
 173         argv[0] = name;
 174
 175         ret = fn(argc, argv);
 176
 177         free(name);
 178
 179         return ret;
 180 }
 181
 182 static void run_collection(struct collection *coll)
 183 {
 184         struct bench *bench;
 185         const char *argv[2];
 186
 187         argv[1] = NULL;
 188         /*
 189          * TODO:
 190          *
 191          * Preparing preset parameters for
 192          * embedded, ordinary PC, HPC, etc...
 193          * would be helpful.
 194          */
 195         for_each_bench(coll, bench) {
 196                 if (!bench->fn)
 197                         break;
 198                 printf("# Running %s/%s benchmark...\n", coll->name, bench->name);
 199                 fflush(stdout);
 200
 201                 argv[1] = bench->name;
 202                 run_bench(coll->name, bench->name, bench->fn, 1, argv);
 203                 printf("\n");
 204         }
 205 }
 206
 207 static void run_all_collections(void)
 208 {
 209         struct collection *coll;
 210
 211         for_each_collection(coll)
 212                 run_collection(coll);
 213 }
 214
 215 int cmd_bench(int argc, const char **argv)
 216 {
 217         struct collection *coll;
 218         int ret = 0;
 219
 220         if (argc < 2) {
 221                 /* No collection specified. */
 222                 print_usage();
 223                 goto end;
 224         }
 225
 226         argc = parse_options(argc, argv, bench_options, bench_usage,
 227                              PARSE_OPT_STOP_AT_NON_OPTION);
 228
 229         bench_format = bench_str2int(bench_format_str);
 230         if (bench_format == BENCH_FORMAT_UNKNOWN) {
 231                 printf("Unknown format descriptor: '%s'\n", bench_format_str);
 232                 goto end;
 233         }
 234
 235         if (bench_repeat == 0) {
 236                 printf("Invalid repeat option: Must specify a positive value\n");
 237                 goto end;
 238         }
 239
 240         if (argc < 1) {
 241                 print_usage();
 242                 goto end;
 243         }
 244
 245         if (!strcmp(argv[0], "all")) {
 246                 run_all_collections();
 247                 goto end;
 248         }
 249
 250         for_each_collection(coll) {
 251                 struct bench *bench;
 252
 253                 if (strcmp(coll->name, argv[0]))
 254                         continue;
 255
 256                 if (argc < 2) {
 257                         /* No bench specified. */
 258                         dump_benchmarks(coll);
 259                         goto end;
 260                 }
 261
 262                 if (!strcmp(argv[1], "all")) {
 263                         run_collection(coll);
 264                         goto end;
 265                 }
 266
 267                 for_each_bench(coll, bench) {
 268                         if (strcmp(bench->name, argv[1]))
 269                                 continue;
 270
 271                         if (bench_format == BENCH_FORMAT_DEFAULT)
 272                                 printf("# Running '%s/%s' benchmark:\n", coll->name, bench->name);
 273                         fflush(stdout);
 274                         ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1);
 275                         goto end;
 276                 }
 277
 278                 if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
 279                         dump_benchmarks(coll);
 280                         goto end;
 281                 }
 282
 283                 printf("Unknown benchmark: '%s' for collection '%s'\n", argv[1], argv[0]);
 284                 ret = 1;
 285                 goto end;
 286         }
 287
 288         printf("Unknown collection: '%s'\n", argv[0]);
 289         ret = 1;
 290
 291 end:
 292         return ret;
 293 }