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