1 /*
2 *
3 * sched-messaging.c
4 *
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 /* ANDROID_CHANGE_BEGIN */
20 #ifdef __BIONIC__
21 #include <asm/page.h>
22 #endif
23 /* ANDROID_CHANGE_END */
24 #include <pthread.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <errno.h>
29 #include <unistd.h>
30 #include <sys/types.h>
31 #include <sys/socket.h>
32 #include <sys/wait.h>
33 #include <sys/time.h>
34 #include <sys/poll.h>
35 #include <limits.h>
36
37 #define DATASIZE 100
38
39 static bool use_pipes = false;
40 static unsigned int loops = 100;
41 static bool thread_mode = false;
42 static unsigned int num_groups = 10;
43
44 struct sender_context {
45 unsigned int num_fds;
46 int ready_out;
47 int wakefd;
48 int out_fds[0];
49 };
50
51 struct receiver_context {
52 unsigned int num_packets;
53 int in_fds[2];
54 int ready_out;
55 int wakefd;
56 };
57
barf(const char * msg)58 static void barf(const char *msg)
59 {
60 fprintf(stderr, "%s (error: %s)\n", msg, strerror(errno));
61 exit(1);
62 }
63
fdpair(int fds[2])64 static void fdpair(int fds[2])
65 {
66 if (use_pipes) {
67 if (pipe(fds) == 0)
68 return;
69 } else {
70 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
71 return;
72 }
73
74 barf(use_pipes ? "pipe()" : "socketpair()");
75 }
76
77 /* Block until we're ready to go */
ready(int ready_out,int wakefd)78 static void ready(int ready_out, int wakefd)
79 {
80 char dummy;
81 struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
82
83 /* Tell them we're ready. */
84 if (write(ready_out, &dummy, 1) != 1)
85 barf("CLIENT: ready write");
86
87 /* Wait for "GO" signal */
88 if (poll(&pollfd, 1, -1) != 1)
89 barf("poll");
90 }
91
92 /* Sender sprays loops messages down each file descriptor */
sender(struct sender_context * ctx)93 static void *sender(struct sender_context *ctx)
94 {
95 char data[DATASIZE];
96 unsigned int i, j;
97
98 ready(ctx->ready_out, ctx->wakefd);
99
100 /* Now pump to every receiver. */
101 for (i = 0; i < loops; i++) {
102 for (j = 0; j < ctx->num_fds; j++) {
103 int ret, done = 0;
104
105 again:
106 ret = write(ctx->out_fds[j], data + done,
107 sizeof(data)-done);
108 if (ret < 0)
109 barf("SENDER: write");
110 done += ret;
111 if (done < DATASIZE)
112 goto again;
113 }
114 }
115
116 return NULL;
117 }
118
119
120 /* One receiver per fd */
receiver(struct receiver_context * ctx)121 static void *receiver(struct receiver_context* ctx)
122 {
123 unsigned int i;
124
125 if (!thread_mode)
126 close(ctx->in_fds[1]);
127
128 /* Wait for start... */
129 ready(ctx->ready_out, ctx->wakefd);
130
131 /* Receive them all */
132 for (i = 0; i < ctx->num_packets; i++) {
133 char data[DATASIZE];
134 int ret, done = 0;
135
136 again:
137 ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
138 if (ret < 0)
139 barf("SERVER: read");
140 done += ret;
141 if (done < DATASIZE)
142 goto again;
143 }
144
145 return NULL;
146 }
147
create_worker(void * ctx,void * (* func)(void *))148 static pthread_t create_worker(void *ctx, void *(*func)(void *))
149 {
150 pthread_attr_t attr;
151 pthread_t childid;
152 int err;
153
154 if (!thread_mode) {
155 /* process mode */
156 /* Fork the receiver. */
157 switch (fork()) {
158 case -1:
159 barf("fork()");
160 break;
161 case 0:
162 (*func) (ctx);
163 exit(0);
164 break;
165 default:
166 break;
167 }
168
169 return (pthread_t)0;
170 }
171
172 if (pthread_attr_init(&attr) != 0)
173 barf("pthread_attr_init:");
174
175 #ifndef __ia64__
176 if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
177 barf("pthread_attr_setstacksize");
178 #endif
179
180 err = pthread_create(&childid, &attr, func, ctx);
181 if (err != 0) {
182 fprintf(stderr, "pthread_create failed: %s (%d)\n",
183 strerror(err), err);
184 exit(-1);
185 }
186 return childid;
187 }
188
reap_worker(pthread_t id)189 static void reap_worker(pthread_t id)
190 {
191 int proc_status;
192 void *thread_status;
193
194 if (!thread_mode) {
195 /* process mode */
196 wait(&proc_status);
197 if (!WIFEXITED(proc_status))
198 exit(1);
199 } else {
200 pthread_join(id, &thread_status);
201 }
202 }
203
204 /* One group of senders and receivers */
group(pthread_t * pth,unsigned int num_fds,int ready_out,int wakefd)205 static unsigned int group(pthread_t *pth,
206 unsigned int num_fds,
207 int ready_out,
208 int wakefd)
209 {
210 unsigned int i;
211 struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
212 + num_fds * sizeof(int));
213
214 if (!snd_ctx)
215 barf("malloc()");
216
217 for (i = 0; i < num_fds; i++) {
218 int fds[2];
219 struct receiver_context *ctx = malloc(sizeof(*ctx));
220
221 if (!ctx)
222 barf("malloc()");
223
224
225 /* Create the pipe between client and server */
226 fdpair(fds);
227
228 ctx->num_packets = num_fds * loops;
229 ctx->in_fds[0] = fds[0];
230 ctx->in_fds[1] = fds[1];
231 ctx->ready_out = ready_out;
232 ctx->wakefd = wakefd;
233
234 pth[i] = create_worker(ctx, (void *)receiver);
235
236 snd_ctx->out_fds[i] = fds[1];
237 if (!thread_mode)
238 close(fds[0]);
239 }
240
241 /* Now we have all the fds, fork the senders */
242 for (i = 0; i < num_fds; i++) {
243 snd_ctx->ready_out = ready_out;
244 snd_ctx->wakefd = wakefd;
245 snd_ctx->num_fds = num_fds;
246
247 pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
248 }
249
250 /* Close the fds we have left */
251 if (!thread_mode)
252 for (i = 0; i < num_fds; i++)
253 close(snd_ctx->out_fds[i]);
254
255 /* Return number of children to reap */
256 return num_fds * 2;
257 }
258
259 static const struct option options[] = {
260 OPT_BOOLEAN('p', "pipe", &use_pipes,
261 "Use pipe() instead of socketpair()"),
262 OPT_BOOLEAN('t', "thread", &thread_mode,
263 "Be multi thread instead of multi process"),
264 OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
265 OPT_UINTEGER('l', "loop", &loops, "Specify number of loops"),
266 OPT_END()
267 };
268
269 static const char * const bench_sched_message_usage[] = {
270 "perf bench sched messaging <options>",
271 NULL
272 };
273
bench_sched_messaging(int argc,const char ** argv,const char * prefix __used)274 int bench_sched_messaging(int argc, const char **argv,
275 const char *prefix __used)
276 {
277 unsigned int i, total_children;
278 struct timeval start, stop, diff;
279 unsigned int num_fds = 20;
280 int readyfds[2], wakefds[2];
281 char dummy;
282 pthread_t *pth_tab;
283
284 argc = parse_options(argc, argv, options,
285 bench_sched_message_usage, 0);
286
287 pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
288 if (!pth_tab)
289 barf("main:malloc()");
290
291 fdpair(readyfds);
292 fdpair(wakefds);
293
294 total_children = 0;
295 for (i = 0; i < num_groups; i++)
296 total_children += group(pth_tab+total_children, num_fds,
297 readyfds[1], wakefds[0]);
298
299 /* Wait for everyone to be ready */
300 for (i = 0; i < total_children; i++)
301 if (read(readyfds[0], &dummy, 1) != 1)
302 barf("Reading for readyfds");
303
304 gettimeofday(&start, NULL);
305
306 /* Kick them off */
307 if (write(wakefds[1], &dummy, 1) != 1)
308 barf("Writing to start them");
309
310 /* Reap them all */
311 for (i = 0; i < total_children; i++)
312 reap_worker(pth_tab[i]);
313
314 gettimeofday(&stop, NULL);
315
316 timersub(&stop, &start, &diff);
317
318 switch (bench_format) {
319 case BENCH_FORMAT_DEFAULT:
320 printf("# %d sender and receiver %s per group\n",
321 num_fds, thread_mode ? "threads" : "processes");
322 printf("# %d groups == %d %s run\n\n",
323 num_groups, num_groups * 2 * num_fds,
324 thread_mode ? "threads" : "processes");
325 printf(" %14s: %lu.%03lu [sec]\n", "Total time",
326 diff.tv_sec,
327 (unsigned long) (diff.tv_usec/1000));
328 break;
329 case BENCH_FORMAT_SIMPLE:
330 printf("%lu.%03lu\n", diff.tv_sec,
331 (unsigned long) (diff.tv_usec/1000));
332 break;
333 default:
334 /* reaching here is something disaster */
335 fprintf(stderr, "Unknown format:%d\n", bench_format);
336 exit(1);
337 break;
338 }
339
340 return 0;
341 }
342