summaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-bench.c
blob: cad31b1d343896326509bcc4ea36d4a3261d562d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
// SPDX-License-Identifier: GPL-2.0
/*
 * builtin-bench.c
 *
 * General benchmarking collections provided by perf
 *
 * Copyright (C) 2009, Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
 */

/*
 * Available benchmark collection list:
 *
 *  sched ... scheduler and IPC performance
 *  mem   ... memory access performance
 *  numa  ... NUMA scheduling and MM performance
 *  futex ... Futex performance
 *  epoll ... Event poll performance
 */
#include <subcmd/parse-options.h>
#include "builtin.h"
#include "bench/bench.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <linux/zalloc.h>

typedef int (*bench_fn_t)(int argc, const char **argv);

struct bench {
	const char	*name;
	const char	*summary;
	bench_fn_t	fn;
};

#ifdef HAVE_LIBNUMA_SUPPORT
static struct bench numa_benchmarks[] = {
	{ "mem",	"Benchmark for NUMA workloads",			bench_numa		},
	{ "all",	"Run all NUMA benchmarks",			NULL			},
	{ NULL,		NULL,						NULL			}
};
#endif

static struct bench sched_benchmarks[] = {
	{ "messaging",	"Benchmark for scheduling and IPC",		bench_sched_messaging	},
	{ "pipe",	"Benchmark for pipe() between two processes",	bench_sched_pipe	},
	{ "all",	"Run all scheduler benchmarks",		NULL			},
	{ NULL,		NULL,						NULL			}
};

static struct bench mem_benchmarks[] = {
	{ "memcpy",	"Benchmark for memcpy() functions",		bench_mem_memcpy	},
	{ "memset",	"Benchmark for memset() functions",		bench_mem_memset	},
	{ "all",	"Run all memory access benchmarks",		NULL			},
	{ NULL,		NULL,						NULL			}
};

static struct bench futex_benchmarks[] = {
	{ "hash",	"Benchmark for futex hash table",               bench_futex_hash	},
	{ "wake",	"Benchmark for futex wake calls",               bench_futex_wake	},
	{ "wake-parallel", "Benchmark for parallel futex wake calls",   bench_futex_wake_parallel },
	{ "requeue",	"Benchmark for futex requeue calls",            bench_futex_requeue	},
	/* pi-futexes */
	{ "lock-pi",	"Benchmark for futex lock_pi calls",            bench_futex_lock_pi	},
	{ "all",	"Run all futex benchmarks",			NULL			},
	{ NULL,		NULL,						NULL			}
};

#ifdef HAVE_EVENTFD_SUPPORT
static struct bench epoll_benchmarks[] = {
	{ "wait",	"Benchmark epoll concurrent epoll_waits",       bench_epoll_wait	},
	{ "ctl",	"Benchmark epoll concurrent epoll_ctls",        bench_epoll_ctl		},
	{ "all",	"Run all futex benchmarks",			NULL			},
	{ NULL,		NULL,						NULL			}
};
#endif // HAVE_EVENTFD_SUPPORT

static struct bench internals_benchmarks[] = {
	{ "synthesize", "Benchmark perf event synthesis",	bench_synthesize	},
	{ "kallsyms-parse", "Benchmark kallsyms parsing",	bench_kallsyms_parse	},
	{ NULL,		NULL,					NULL			}
};

struct collection {
	const char	*name;
	const char	*summary;
	struct bench	*benchmarks;
};

static struct collection collections[] = {
	{ "sched",	"Scheduler and IPC benchmarks",			sched_benchmarks	},
	{ "mem",	"Memory access benchmarks",			mem_benchmarks		},
#ifdef HAVE_LIBNUMA_SUPPORT
	{ "numa",	"NUMA scheduling and MM benchmarks",		numa_benchmarks		},
#endif
	{"futex",       "Futex stressing benchmarks",                   futex_benchmarks        },
#ifdef HAVE_EVENTFD_SUPPORT
	{"epoll",       "Epoll stressing benchmarks",                   epoll_benchmarks        },
#endif
	{ "internals",	"Perf-internals benchmarks",			internals_benchmarks	},
	{ "all",	"All benchmarks",				NULL			},
	{ NULL,		NULL,						NULL			}
};

/* Iterate over all benchmark collections: */
#define for_each_collection(coll) \
	for (coll = collections; coll->name; coll++)

/* Iterate over all benchmarks within a collection: */
#define for_each_bench(coll, bench) \
	for (bench = coll->benchmarks; bench && bench->name; bench++)

static void dump_benchmarks(struct collection *coll)
{
	struct bench *bench;

	printf("\n        # List of available benchmarks for collection '%s':\n\n", coll->name);

	for_each_bench(coll, bench)
		printf("%14s: %s\n", bench->name, bench->summary);

	printf("\n");
}

static const char *bench_format_str;

/* Output/formatting style, exported to benchmark modules: */
int bench_format = BENCH_FORMAT_DEFAULT;
unsigned int bench_repeat = 10; /* default number of times to repeat the run */

static const struct option bench_options[] = {
	OPT_STRING('f', "format", &bench_format_str, "default|simple", "Specify the output formatting style"),
	OPT_UINTEGER('r', "repeat",  &bench_repeat,   "Specify amount of times to repeat the run"),
	OPT_END()
};

static const char * const bench_usage[] = {
	"perf bench [<common options>] <collection> <benchmark> [<options>]",
	NULL
};

static void print_usage(void)
{
	struct collection *coll;
	int i;

	printf("Usage: \n");
	for (i = 0; bench_usage[i]; i++)
		printf("\t%s\n", bench_usage[i]);
	printf("\n");

	printf("        # List of all available benchmark collections:\n\n");

	for_each_collection(coll)
		printf("%14s: %s\n", coll->name, coll->summary);
	printf("\n");
}

static int bench_str2int(const char *str)
{
	if (!str)
		return BENCH_FORMAT_DEFAULT;

	if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
		return BENCH_FORMAT_DEFAULT;
	else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
		return BENCH_FORMAT_SIMPLE;

	return BENCH_FORMAT_UNKNOWN;
}

/*
 * Run a specific benchmark but first rename the running task's ->comm[]
 * to something meaningful:
 */
static int run_bench(const char *coll_name, const char *bench_name, bench_fn_t fn,
		     int argc, const char **argv)
{
	int size;
	char *name;
	int ret;

	size = strlen(coll_name) + 1 + strlen(bench_name) + 1;

	name = zalloc(size);
	BUG_ON(!name);

	scnprintf(name, size, "%s-%s", coll_name, bench_name);

	prctl(PR_SET_NAME, name);
	argv[0] = name;

	ret = fn(argc, argv);

	free(name);

	return ret;
}

static void run_collection(struct collection *coll)
{
	struct bench *bench;
	const char *argv[2];

	argv[1] = NULL;
	/*
	 * TODO:
	 *
	 * Preparing preset parameters for
	 * embedded, ordinary PC, HPC, etc...
	 * would be helpful.
	 */
	for_each_bench(coll, bench) {
		if (!bench->fn)
			break;
		printf("# Running %s/%s benchmark...\n", coll->name, bench->name);
		fflush(stdout);

		argv[1] = bench->name;
		run_bench(coll->name, bench->name, bench->fn, 1, argv);
		printf("\n");
	}
}

static void run_all_collections(void)
{
	struct collection *coll;

	for_each_collection(coll)
		run_collection(coll);
}

int cmd_bench(int argc, const char **argv)
{
	struct collection *coll;
	int ret = 0;

	if (argc < 2) {
		/* No collection specified. */
		print_usage();
		goto end;
	}

	argc = parse_options(argc, argv, bench_options, bench_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);

	bench_format = bench_str2int(bench_format_str);
	if (bench_format == BENCH_FORMAT_UNKNOWN) {
		printf("Unknown format descriptor: '%s'\n", bench_format_str);
		goto end;
	}

	if (bench_repeat == 0) {
		printf("Invalid repeat option: Must specify a positive value\n");
		goto end;
	}

	if (argc < 1) {
		print_usage();
		goto end;
	}

	if (!strcmp(argv[0], "all")) {
		run_all_collections();
		goto end;
	}

	for_each_collection(coll) {
		struct bench *bench;

		if (strcmp(coll->name, argv[0]))
			continue;

		if (argc < 2) {
			/* No bench specified. */
			dump_benchmarks(coll);
			goto end;
		}

		if (!strcmp(argv[1], "all")) {
			run_collection(coll);
			goto end;
		}

		for_each_bench(coll, bench) {
			if (strcmp(bench->name, argv[1]))
				continue;

			if (bench_format == BENCH_FORMAT_DEFAULT)
				printf("# Running '%s/%s' benchmark:\n", coll->name, bench->name);
			fflush(stdout);
			ret = run_bench(coll->name, bench->name, bench->fn, argc-1, argv+1);
			goto end;
		}

		if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
			dump_benchmarks(coll);
			goto end;
		}

		printf("Unknown benchmark: '%s' for collection '%s'\n", argv[1], argv[0]);
		ret = 1;
		goto end;
	}

	printf("Unknown collection: '%s'\n", argv[0]);
	ret = 1;

end:
	return ret;
}