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