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Hitoshi Mitakee27454c2009-11-05 09:31:32 +09001/*
2 *
Hitoshi Mitake20442792009-12-13 17:01:59 +09003 * sched-messaging.c
Hitoshi Mitakee27454c2009-11-05 09:31:32 +09004 *
5 * messaging: Benchmark for scheduler and IPC mechanisms
6 *
7 * Based on hackbench by Rusty Russell <rusty@rustcorp.com.au>
8 * Ported to perf by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
9 *
10 */
11
12#include "../perf.h"
13#include "../util/util.h"
14#include "../util/parse-options.h"
15#include "../builtin.h"
16#include "bench.h"
17
18/* Test groups of 20 processes spraying to 20 receivers */
19#include <pthread.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <errno.h>
24#include <unistd.h>
25#include <sys/types.h>
26#include <sys/socket.h>
27#include <sys/wait.h>
28#include <sys/time.h>
29#include <sys/poll.h>
30#include <limits.h>
31
32#define DATASIZE 100
33
Ian Munsiec0555642010-04-13 18:37:33 +100034static bool use_pipes = false;
Hitoshi Mitakee27454c2009-11-05 09:31:32 +090035static unsigned int loops = 100;
Ian Munsiec0555642010-04-13 18:37:33 +100036static bool thread_mode = false;
Hitoshi Mitakee27454c2009-11-05 09:31:32 +090037static unsigned int num_groups = 10;
Hitoshi Mitakee27454c2009-11-05 09:31:32 +090038
39struct sender_context {
40 unsigned int num_fds;
41 int ready_out;
42 int wakefd;
43 int out_fds[0];
44};
45
46struct receiver_context {
47 unsigned int num_packets;
48 int in_fds[2];
49 int ready_out;
50 int wakefd;
51};
52
53static void barf(const char *msg)
54{
55 fprintf(stderr, "%s (error: %s)\n", msg, strerror(errno));
56 exit(1);
57}
58
59static void fdpair(int fds[2])
60{
61 if (use_pipes) {
62 if (pipe(fds) == 0)
63 return;
64 } else {
65 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
66 return;
67 }
68
69 barf(use_pipes ? "pipe()" : "socketpair()");
70}
71
72/* Block until we're ready to go */
73static void ready(int ready_out, int wakefd)
74{
75 char dummy;
76 struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
77
78 /* Tell them we're ready. */
79 if (write(ready_out, &dummy, 1) != 1)
80 barf("CLIENT: ready write");
81
82 /* Wait for "GO" signal */
83 if (poll(&pollfd, 1, -1) != 1)
84 barf("poll");
85}
86
87/* Sender sprays loops messages down each file descriptor */
88static void *sender(struct sender_context *ctx)
89{
90 char data[DATASIZE];
91 unsigned int i, j;
92
93 ready(ctx->ready_out, ctx->wakefd);
94
95 /* Now pump to every receiver. */
96 for (i = 0; i < loops; i++) {
97 for (j = 0; j < ctx->num_fds; j++) {
98 int ret, done = 0;
99
100again:
101 ret = write(ctx->out_fds[j], data + done,
102 sizeof(data)-done);
103 if (ret < 0)
104 barf("SENDER: write");
105 done += ret;
106 if (done < DATASIZE)
107 goto again;
108 }
109 }
110
111 return NULL;
112}
113
114
115/* One receiver per fd */
116static void *receiver(struct receiver_context* ctx)
117{
118 unsigned int i;
119
120 if (!thread_mode)
121 close(ctx->in_fds[1]);
122
123 /* Wait for start... */
124 ready(ctx->ready_out, ctx->wakefd);
125
126 /* Receive them all */
127 for (i = 0; i < ctx->num_packets; i++) {
128 char data[DATASIZE];
129 int ret, done = 0;
130
131again:
132 ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
133 if (ret < 0)
134 barf("SERVER: read");
135 done += ret;
136 if (done < DATASIZE)
137 goto again;
138 }
139
140 return NULL;
141}
142
143static pthread_t create_worker(void *ctx, void *(*func)(void *))
144{
145 pthread_attr_t attr;
146 pthread_t childid;
147 int err;
148
149 if (!thread_mode) {
150 /* process mode */
151 /* Fork the receiver. */
152 switch (fork()) {
153 case -1:
154 barf("fork()");
155 break;
156 case 0:
157 (*func) (ctx);
158 exit(0);
159 break;
160 default:
161 break;
162 }
163
164 return (pthread_t)0;
165 }
166
167 if (pthread_attr_init(&attr) != 0)
168 barf("pthread_attr_init:");
169
170#ifndef __ia64__
171 if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
172 barf("pthread_attr_setstacksize");
173#endif
174
175 err = pthread_create(&childid, &attr, func, ctx);
176 if (err != 0) {
177 fprintf(stderr, "pthread_create failed: %s (%d)\n",
178 strerror(err), err);
179 exit(-1);
180 }
181 return childid;
182}
183
184static void reap_worker(pthread_t id)
185{
186 int proc_status;
187 void *thread_status;
188
189 if (!thread_mode) {
190 /* process mode */
191 wait(&proc_status);
192 if (!WIFEXITED(proc_status))
193 exit(1);
194 } else {
195 pthread_join(id, &thread_status);
196 }
197}
198
199/* One group of senders and receivers */
200static unsigned int group(pthread_t *pth,
201 unsigned int num_fds,
202 int ready_out,
203 int wakefd)
204{
205 unsigned int i;
206 struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
207 + num_fds * sizeof(int));
208
209 if (!snd_ctx)
210 barf("malloc()");
211
212 for (i = 0; i < num_fds; i++) {
213 int fds[2];
214 struct receiver_context *ctx = malloc(sizeof(*ctx));
215
216 if (!ctx)
217 barf("malloc()");
218
219
220 /* Create the pipe between client and server */
221 fdpair(fds);
222
223 ctx->num_packets = num_fds * loops;
224 ctx->in_fds[0] = fds[0];
225 ctx->in_fds[1] = fds[1];
226 ctx->ready_out = ready_out;
227 ctx->wakefd = wakefd;
228
229 pth[i] = create_worker(ctx, (void *)receiver);
230
231 snd_ctx->out_fds[i] = fds[1];
232 if (!thread_mode)
233 close(fds[0]);
234 }
235
236 /* Now we have all the fds, fork the senders */
237 for (i = 0; i < num_fds; i++) {
238 snd_ctx->ready_out = ready_out;
239 snd_ctx->wakefd = wakefd;
240 snd_ctx->num_fds = num_fds;
241
242 pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
243 }
244
245 /* Close the fds we have left */
246 if (!thread_mode)
247 for (i = 0; i < num_fds; i++)
248 close(snd_ctx->out_fds[i]);
249
250 /* Return number of children to reap */
251 return num_fds * 2;
252}
253
254static const struct option options[] = {
255 OPT_BOOLEAN('p', "pipe", &use_pipes,
256 "Use pipe() instead of socketpair()"),
257 OPT_BOOLEAN('t', "thread", &thread_mode,
258 "Be multi thread instead of multi process"),
259 OPT_INTEGER('g', "group", &num_groups,
260 "Specify number of groups"),
261 OPT_INTEGER('l', "loop", &loops,
262 "Specify number of loops"),
Hitoshi Mitakee27454c2009-11-05 09:31:32 +0900263 OPT_END()
264};
265
266static const char * const bench_sched_message_usage[] = {
267 "perf bench sched messaging <options>",
268 NULL
269};
270
271int bench_sched_messaging(int argc, const char **argv,
272 const char *prefix __used)
273{
274 unsigned int i, total_children;
275 struct timeval start, stop, diff;
276 unsigned int num_fds = 20;
277 int readyfds[2], wakefds[2];
278 char dummy;
279 pthread_t *pth_tab;
280
281 argc = parse_options(argc, argv, options,
282 bench_sched_message_usage, 0);
283
284 pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
285 if (!pth_tab)
286 barf("main:malloc()");
287
288 fdpair(readyfds);
289 fdpair(wakefds);
290
291 total_children = 0;
292 for (i = 0; i < num_groups; i++)
293 total_children += group(pth_tab+total_children, num_fds,
294 readyfds[1], wakefds[0]);
295
296 /* Wait for everyone to be ready */
297 for (i = 0; i < total_children; i++)
298 if (read(readyfds[0], &dummy, 1) != 1)
299 barf("Reading for readyfds");
300
301 gettimeofday(&start, NULL);
302
303 /* Kick them off */
304 if (write(wakefds[1], &dummy, 1) != 1)
305 barf("Writing to start them");
306
307 /* Reap them all */
308 for (i = 0; i < total_children; i++)
309 reap_worker(pth_tab[i]);
310
311 gettimeofday(&stop, NULL);
312
313 timersub(&stop, &start, &diff);
314
Hitoshi Mitakecced06c2009-11-10 08:20:01 +0900315 switch (bench_format) {
316 case BENCH_FORMAT_DEFAULT:
Hitoshi Mitakec5659b72009-11-11 00:04:02 +0900317 printf("# %d sender and receiver %s per group\n",
Hitoshi Mitakee27454c2009-11-05 09:31:32 +0900318 num_fds, thread_mode ? "threads" : "processes");
Hitoshi Mitakec5659b72009-11-11 00:04:02 +0900319 printf("# %d groups == %d %s run\n\n",
Hitoshi Mitakee27454c2009-11-05 09:31:32 +0900320 num_groups, num_groups * 2 * num_fds,
321 thread_mode ? "threads" : "processes");
Hitoshi Mitakec5659b72009-11-11 00:04:02 +0900322 printf(" %14s: %lu.%03lu [sec]\n", "Total time",
David Miller2cd90462009-12-13 23:56:22 -0800323 diff.tv_sec,
324 (unsigned long) (diff.tv_usec/1000));
Hitoshi Mitakecced06c2009-11-10 08:20:01 +0900325 break;
326 case BENCH_FORMAT_SIMPLE:
David Miller2cd90462009-12-13 23:56:22 -0800327 printf("%lu.%03lu\n", diff.tv_sec,
328 (unsigned long) (diff.tv_usec/1000));
Hitoshi Mitakecced06c2009-11-10 08:20:01 +0900329 break;
330 default:
331 /* reaching here is something disaster */
332 fprintf(stderr, "Unknown format:%d\n", bench_format);
333 exit(1);
334 break;
Hitoshi Mitakee27454c2009-11-05 09:31:32 +0900335 }
336
337 return 0;
338}