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  *  syscall ... System call performance
  15  *  mem   ... memory access performance
  16  *  numa  ... NUMA scheduling and MM performance
  17  *  futex ... Futex performance
  18  *  epoll ... Event poll performance
  19  */
  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 #include <linux/zalloc.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 syscall_benchmarks[] = {
  54         { "basic",      "Benchmark for basic getppid(2) calls",         bench_syscall_basic     },
  55         { "all",        "Run all syscall benchmarks",                   NULL                    },
  56         { NULL,         NULL,                                           NULL                    },
  57 };
  58
  59 static struct bench mem_benchmarks[] = {
  60         { "memcpy",     "Benchmark for memcpy() functions",             bench_mem_memcpy        },
  61         { "memset",     "Benchmark for memset() functions",             bench_mem_memset        },
  62         { "find_bit",   "Benchmark for find_bit() functions",           bench_mem_find_bit      },
  63         { "all",        "Run all memory access benchmarks",             NULL                    },
  64         { NULL,         NULL,                                           NULL                    }
  65 };
  66
  67 static struct bench futex_benchmarks[] = {
  68         { "hash",       "Benchmark for futex hash table",               bench_futex_hash        },
  69         { "wake",       "Benchmark for futex wake calls",               bench_futex_wake        },
  70         { "wake-parallel", "Benchmark for parallel futex wake calls",   bench_futex_wake_parallel },
  71         { "requeue",    "Benchmark for futex requeue calls",            bench_futex_requeue     },
  72         /* pi-futexes */
  73         { "lock-pi",    "Benchmark for futex lock_pi calls",            bench_futex_lock_pi     },
  74         { "all",        "Run all futex benchmarks",                     NULL                    },
  75         { NULL,         NULL,                                           NULL                    }
  76 };
  77
  78 #ifdef HAVE_EVENTFD_SUPPORT
  79 static struct bench epoll_benchmarks[] = {
  80         { "wait",       "Benchmark epoll concurrent epoll_waits",       bench_epoll_wait        },
  81         { "ctl",        "Benchmark epoll concurrent epoll_ctls",        bench_epoll_ctl         },
  82         { "all",        "Run all futex benchmarks",                     NULL                    },
  83         { NULL,         NULL,                                           NULL                    }
  84 };
  85 #endif // HAVE_EVENTFD_SUPPORT
  86
  87 static struct bench internals_benchmarks[] = {
  88         { "synthesize", "Benchmark perf event synthesis",       bench_synthesize        },
  89         { "kallsyms-parse", "Benchmark kallsyms parsing",       bench_kallsyms_parse    },
  90         { "inject-build-id", "Benchmark build-id injection",    bench_inject_build_id   },
  91         { "evlist-open-close", "Benchmark evlist open and close",       bench_evlist_open_close },
  92         { NULL,         NULL,                                   NULL                    }
  93 };
  94
  95 struct collection {
  96         const char      *name;
  97         const char      *summary;
  98         struct bench    *benchmarks;
  99 };
 100
 101 static struct collection collections[] = {
 102         { "sched",      "Scheduler and IPC benchmarks",                 sched_benchmarks        },
 103         { "syscall",    "System call benchmarks",                       syscall_benchmarks      },
 104         { "mem",        "Memory access benchmarks",                     mem_benchmarks          },
 105 #ifdef HAVE_LIBNUMA_SUPPORT
 106         { "numa",       "NUMA scheduling and MM benchmarks",            numa_benchmarks         },
 107 #endif
 108         {"futex",       "Futex stressing benchmarks",                   futex_benchmarks        },
 109 #ifdef HAVE_EVENTFD_SUPPORT
 110         {"epoll",       "Epoll stressing benchmarks",                   epoll_benchmarks        },
 111 #endif
 112         { "internals",  "Perf-internals benchmarks",                    internals_benchmarks    },
 113         { "all",        "All benchmarks",                               NULL                    },
 114         { NULL,         NULL,                                           NULL                    }
 115 };
 116
 117 /* Iterate over all benchmark collections: */
 118 #define for_each_collection(coll) \
 119         for (coll = collections; coll->name; coll++)
 120
 121 /* Iterate over all benchmarks within a collection: */
 122 #define for_each_bench(coll, bench) \
 123         for (bench = coll->benchmarks; bench && bench->name; bench++)
 124
 125 static void dump_benchmarks(struct collection *coll)
 126 {
 127         struct bench *bench;
 128
 129         printf("\n        # List of available benchmarks for collection '%s':\n\n", coll->name);
 130
 131         for_each_bench(coll, bench)
 132                 printf("%14s: %s\n", bench->name, bench->summary);
 133
 134         printf("\n");
 135 }
 136
 137 static const char *bench_format_str;
 138
 139 /* Output/formatting style, exported to benchmark modules: */
 140 int bench_format = BENCH_FORMAT_DEFAULT;
 141 unsigned int bench_repeat = 10; /* default number of times to repeat the run */
 142
 143 static const struct option bench_options[] = {
 144         OPT_STRING('f', "format", &bench_format_str, "default|simple", "Specify the output formatting style"),
 145         OPT_UINTEGER('r', "repeat",  &bench_repeat,   "Specify amount of times to repeat the run"),
 146         OPT_END()
 147 };
 148
 149 static const char * const bench_usage[] = {
 150         "perf bench [<common options>] <collection> <benchmark> [<options>]",
 151         NULL
 152 };
 153
 154 static void print_usage(void)
 155 {
 156         struct collection *coll;
 157         int i;
 158
 159         printf("Usage: \n");
 160         for (i = 0; bench_usage[i]; i++)
 161                 printf("\t%s\n", bench_usage[i]);
 162         printf("\n");
 163
 164         printf("        # List of all available benchmark collections:\n\n");
 165
 166         for_each_collection(coll)
 167                 printf("%14s: %s\n", coll->name, coll->summary);
 168         printf("\n");
 169 }
 170
 171 static int bench_str2int(const char *str)
 172 {
 173         if (!str)
 174                 return BENCH_FORMAT_DEFAULT;
 175
 176         if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
 177                 return BENCH_FORMAT_DEFAULT;
 178         else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
 179                 return BENCH_FORMAT_SIMPLE;
 180
 181         return BENCH_FORMAT_UNKNOWN;
 182 }
 183
 184 /*
 185  * Run a specific benchmark but first rename the running task's ->comm[]
 186  * to something meaningful:
 187  */
 188 static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t fn,
 189                      int argc, const char **argv)
 190 {
 191         int size;
 192         char *name;
 193         int ret;
 194
 195         size = strlen(coll_name) + 1 + strlen(bench_name) + 1;
 196
 197         name = zalloc(size);
 198         BUG_ON(!name);
 199
 200         scnprintf(name, size, "%s-%s", coll_name, bench_name);
 201
 202         prctl(PR_SET_NAME, name);
 203         argv[0] = name;
 204
 205         ret = fn(argc, argv);
 206
 207         free(name);
 208
 209         return ret;
 210 }
 211
 212 static void run_collection(struct collection *coll)
 213 {
 214         struct bench *bench;
 215         const char *argv[2];
 216
 217         argv[1] = NULL;
 218         /*
 219          * TODO:
 220          *
 221          * Preparing preset parameters for
 222          * embedded, ordinary PC, HPC, etc...
 223          * would be helpful.
 224          */
 225         for_each_bench(coll, bench) {
 226                 if (!bench->fn)
 227                         break;
 228                 printf("# Running %s/%s benchmark...\n", coll->name, bench->name);
 229                 fflush(stdout);
 230
 231                 argv[1] = bench->name;
 232                 run_bench(coll->name, bench->name, bench->fn, 1, argv);
 233                 printf("\n");
 234         }
 235 }
 236
 237 static void run_all_collections(void)
 238 {
 239         struct collection *coll;
 240
 241         for_each_collection(coll)
 242                 run_collection(coll);
 243 }
 244
 245 int cmd_bench(int argc, const char **argv)
 246 {
 247         struct collection *coll;
 248         int ret = 0;
 249
 250         if (argc < 2) {
 251                 /* No collection specified. */
 252                 print_usage();
 253                 goto end;
 254         }
 255
 256         argc = parse_options(argc, argv, bench_options, bench_usage,
 257                              PARSE_OPT_STOP_AT_NON_OPTION);
 258
 259         bench_format = bench_str2int(bench_format_str);
 260         if (bench_format == BENCH_FORMAT_UNKNOWN) {
 261                 printf("Unknown format descriptor: '%s'\n", bench_format_str);
 262                 goto end;
 263         }
 264
 265         if (bench_repeat == 0) {
 266                 printf("Invalid repeat option: Must specify a positive value\n");
 267                 goto end;
 268         }
 269
 270         if (argc < 1) {
 271                 print_usage();
 272                 goto end;
 273         }
 274
 275         if (!strcmp(argv[0], "all")) {
 276                 run_all_collections();
 277                 goto end;
 278         }
 279
 280         for_each_collection(coll) {
 281                 struct bench *bench;
 282
 283                 if (strcmp(coll->name, argv[0]))
 284                         continue;
 285
 286                 if (argc < 2) {
 287                         /* No bench specified. */
 288                         dump_benchmarks(coll);
 289                         goto end;
 290                 }
 291
 292                 if (!strcmp(argv[1], "all")) {
 293                         run_collection(coll);
 294                         goto end;
 295                 }
 296
 297                 for_each_bench(coll, bench) {
 298                         if (strcmp(bench->name, argv[1]))
 299                                 continue;
 300
 301                         if (bench_format == BENCH_FORMAT_DEFAULT)
 302                                 printf("# Running '%s/%s' benchmark:\n", coll->name, bench->name);
 303                         fflush(stdout);
 304                         ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1);
 305                         goto end;
 306                 }
 307
 308                 if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
 309                         dump_benchmarks(coll);
 310                         goto end;
 311                 }
 312
 313                 printf("Unknown benchmark: '%s' for collection '%s'\n", argv[1], argv[0]);
 314                 ret = 1;
 315                 goto end;
 316         }
 317
 318         printf("Unknown collection: '%s'\n", argv[0]);
 319         ret = 1;
 320
 321 end:
 322         return ret;
 323 }