Root/tools/perf/builtin-bench.c

1/*
2 *
3 * builtin-bench.c
4 *
5 * General benchmarking subsystem provided by perf
6 *
7 * Copyright (C) 2009, Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
8 *
9 */
10
11/*
12 *
13 * Available subsystem list:
14 * sched ... scheduler and IPC mechanism
15 * mem ... memory access performance
16 *
17 */
18
19#include "perf.h"
20#include "util/util.h"
21#include "util/parse-options.h"
22#include "builtin.h"
23#include "bench/bench.h"
24
25#include <stdio.h>
26#include <stdlib.h>
27#include <string.h>
28
29struct bench_suite {
30    const char *name;
31    const char *summary;
32    int (*fn)(int, const char **, const char *);
33};
34                        \
35/* sentinel: easy for help */
36#define suite_all { "all", "test all suite (pseudo suite)", NULL }
37
38static struct bench_suite sched_suites[] = {
39    { "messaging",
40      "Benchmark for scheduler and IPC mechanisms",
41      bench_sched_messaging },
42    { "pipe",
43      "Flood of communication over pipe() between two processes",
44      bench_sched_pipe },
45    suite_all,
46    { NULL,
47      NULL,
48      NULL }
49};
50
51static struct bench_suite mem_suites[] = {
52    { "memcpy",
53      "Simple memory copy in various ways",
54      bench_mem_memcpy },
55    suite_all,
56    { NULL,
57      NULL,
58      NULL }
59};
60
61struct bench_subsys {
62    const char *name;
63    const char *summary;
64    struct bench_suite *suites;
65};
66
67static struct bench_subsys subsystems[] = {
68    { "sched",
69      "scheduler and IPC mechanism",
70      sched_suites },
71    { "mem",
72      "memory access performance",
73      mem_suites },
74    { "all", /* sentinel: easy for help */
75      "test all subsystem (pseudo subsystem)",
76      NULL },
77    { NULL,
78      NULL,
79      NULL }
80};
81
82static void dump_suites(int subsys_index)
83{
84    int i;
85
86    printf("# List of available suites for %s...\n\n",
87           subsystems[subsys_index].name);
88
89    for (i = 0; subsystems[subsys_index].suites[i].name; i++)
90        printf("%14s: %s\n",
91               subsystems[subsys_index].suites[i].name,
92               subsystems[subsys_index].suites[i].summary);
93
94    printf("\n");
95    return;
96}
97
98static const char *bench_format_str;
99int bench_format = BENCH_FORMAT_DEFAULT;
100
101static const struct option bench_options[] = {
102    OPT_STRING('f', "format", &bench_format_str, "default",
103            "Specify format style"),
104    OPT_END()
105};
106
107static const char * const bench_usage[] = {
108    "perf bench [<common options>] <subsystem> <suite> [<options>]",
109    NULL
110};
111
112static void print_usage(void)
113{
114    int i;
115
116    printf("Usage: \n");
117    for (i = 0; bench_usage[i]; i++)
118        printf("\t%s\n", bench_usage[i]);
119    printf("\n");
120
121    printf("# List of available subsystems...\n\n");
122
123    for (i = 0; subsystems[i].name; i++)
124        printf("%14s: %s\n",
125               subsystems[i].name, subsystems[i].summary);
126    printf("\n");
127}
128
129static int bench_str2int(const char *str)
130{
131    if (!str)
132        return BENCH_FORMAT_DEFAULT;
133
134    if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
135        return BENCH_FORMAT_DEFAULT;
136    else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
137        return BENCH_FORMAT_SIMPLE;
138
139    return BENCH_FORMAT_UNKNOWN;
140}
141
142static void all_suite(struct bench_subsys *subsys) /* FROM HERE */
143{
144    int i;
145    const char *argv[2];
146    struct bench_suite *suites = subsys->suites;
147
148    argv[1] = NULL;
149    /*
150     * TODO:
151     * preparing preset parameters for
152     * embedded, ordinary PC, HPC, etc...
153     * will be helpful
154     */
155    for (i = 0; suites[i].fn; i++) {
156        printf("# Running %s/%s benchmark...\n",
157               subsys->name,
158               suites[i].name);
159
160        argv[1] = suites[i].name;
161        suites[i].fn(1, argv, NULL);
162        printf("\n");
163    }
164}
165
166static void all_subsystem(void)
167{
168    int i;
169    for (i = 0; subsystems[i].suites; i++)
170        all_suite(&subsystems[i]);
171}
172
173int cmd_bench(int argc, const char **argv, const char *prefix __used)
174{
175    int i, j, status = 0;
176
177    if (argc < 2) {
178        /* No subsystem specified. */
179        print_usage();
180        goto end;
181    }
182
183    argc = parse_options(argc, argv, bench_options, bench_usage,
184                 PARSE_OPT_STOP_AT_NON_OPTION);
185
186    bench_format = bench_str2int(bench_format_str);
187    if (bench_format == BENCH_FORMAT_UNKNOWN) {
188        printf("Unknown format descriptor:%s\n", bench_format_str);
189        goto end;
190    }
191
192    if (argc < 1) {
193        print_usage();
194        goto end;
195    }
196
197    if (!strcmp(argv[0], "all")) {
198        all_subsystem();
199        goto end;
200    }
201
202    for (i = 0; subsystems[i].name; i++) {
203        if (strcmp(subsystems[i].name, argv[0]))
204            continue;
205
206        if (argc < 2) {
207            /* No suite specified. */
208            dump_suites(i);
209            goto end;
210        }
211
212        if (!strcmp(argv[1], "all")) {
213            all_suite(&subsystems[i]);
214            goto end;
215        }
216
217        for (j = 0; subsystems[i].suites[j].name; j++) {
218            if (strcmp(subsystems[i].suites[j].name, argv[1]))
219                continue;
220
221            if (bench_format == BENCH_FORMAT_DEFAULT)
222                printf("# Running %s/%s benchmark...\n",
223                       subsystems[i].name,
224                       subsystems[i].suites[j].name);
225            status = subsystems[i].suites[j].fn(argc - 1,
226                                argv + 1, prefix);
227            goto end;
228        }
229
230        if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
231            dump_suites(i);
232            goto end;
233        }
234
235        printf("Unknown suite:%s for %s\n", argv[1], argv[0]);
236        status = 1;
237        goto end;
238    }
239
240    printf("Unknown subsystem:%s\n", argv[0]);
241    status = 1;
242
243end:
244    return status;
245}
246

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