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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#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
34static bool use_pipes = false;
35static unsigned int loops = 100;
36static bool thread_mode = false;
37static unsigned int num_groups = 10;
38
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_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
260 OPT_UINTEGER('l', "loop", &loops, "Specify number of loops"),
261 OPT_END()
262};
263
264static const char * const bench_sched_message_usage[] = {
265 "perf bench sched messaging <options>",
266 NULL
267};
268
269int bench_sched_messaging(int argc, const char **argv,
270 const char *prefix __used)
271{
272 unsigned int i, total_children;
273 struct timeval start, stop, diff;
274 unsigned int num_fds = 20;
275 int readyfds[2], wakefds[2];
276 char dummy;
277 pthread_t *pth_tab;
278
279 argc = parse_options(argc, argv, options,
280 bench_sched_message_usage, 0);
281
282 pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
283 if (!pth_tab)
284 barf("main:malloc()");
285
286 fdpair(readyfds);
287 fdpair(wakefds);
288
289 total_children = 0;
290 for (i = 0; i < num_groups; i++)
291 total_children += group(pth_tab+total_children, num_fds,
292 readyfds[1], wakefds[0]);
293
294 /* Wait for everyone to be ready */
295 for (i = 0; i < total_children; i++)
296 if (read(readyfds[0], &dummy, 1) != 1)
297 barf("Reading for readyfds");
298
299 gettimeofday(&start, NULL);
300
301 /* Kick them off */
302 if (write(wakefds[1], &dummy, 1) != 1)
303 barf("Writing to start them");
304
305 /* Reap them all */
306 for (i = 0; i < total_children; i++)
307 reap_worker(pth_tab[i]);
308
309 gettimeofday(&stop, NULL);
310
311 timersub(&stop, &start, &diff);
312
313 switch (bench_format) {
314 case BENCH_FORMAT_DEFAULT:
315 printf("# %d sender and receiver %s per group\n",
316 num_fds, thread_mode ? "threads" : "processes");
317 printf("# %d groups == %d %s run\n\n",
318 num_groups, num_groups * 2 * num_fds,
319 thread_mode ? "threads" : "processes");
320 printf(" %14s: %lu.%03lu [sec]\n", "Total time",
321 diff.tv_sec,
322 (unsigned long) (diff.tv_usec/1000));
323 break;
324 case BENCH_FORMAT_SIMPLE:
325 printf("%lu.%03lu\n", diff.tv_sec,
326 (unsigned long) (diff.tv_usec/1000));
327 break;
328 default:
329 /* reaching here is something disaster */
330 fprintf(stderr, "Unknown format:%d\n", bench_format);
331 exit(1);
332 break;
333 }
334
335 return 0;
336}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 *
4 * sched-messaging.c
5 *
6 * messaging: Benchmark for scheduler and IPC mechanisms
7 *
8 * Based on hackbench by Rusty Russell <rusty@rustcorp.com.au>
9 * Ported to perf by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
10 *
11 */
12
13#include <subcmd/parse-options.h>
14#include "bench.h"
15
16/* Test groups of 20 processes spraying to 20 receivers */
17#include <pthread.h>
18#include <stdio.h>
19#include <stdlib.h>
20#include <string.h>
21#include <errno.h>
22#include <unistd.h>
23#include <sys/types.h>
24#include <sys/socket.h>
25#include <sys/wait.h>
26#include <sys/time.h>
27#include <poll.h>
28#include <limits.h>
29#include <err.h>
30#include <linux/time64.h>
31
32#define DATASIZE 100
33
34static bool use_pipes = false;
35static unsigned int nr_loops = 100;
36static bool thread_mode = false;
37static unsigned int num_groups = 10;
38
39struct sender_context {
40 unsigned int num_fds;
41 int ready_out;
42 int wakefd;
43 int out_fds[];
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 fdpair(int fds[2])
54{
55 if (use_pipes) {
56 if (pipe(fds) == 0)
57 return;
58 } else {
59 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
60 return;
61 }
62
63 err(EXIT_FAILURE, use_pipes ? "pipe()" : "socketpair()");
64}
65
66/* Block until we're ready to go */
67static void ready(int ready_out, int wakefd)
68{
69 struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
70
71 /* Tell them we're ready. */
72 if (write(ready_out, "R", 1) != 1)
73 err(EXIT_FAILURE, "CLIENT: ready write");
74
75 /* Wait for "GO" signal */
76 if (poll(&pollfd, 1, -1) != 1)
77 err(EXIT_FAILURE, "poll");
78}
79
80/* Sender sprays nr_loops messages down each file descriptor */
81static void *sender(struct sender_context *ctx)
82{
83 char data[DATASIZE];
84 unsigned int i, j;
85
86 ready(ctx->ready_out, ctx->wakefd);
87 memset(data, 'S', sizeof(data));
88
89 /* Now pump to every receiver. */
90 for (i = 0; i < nr_loops; i++) {
91 for (j = 0; j < ctx->num_fds; j++) {
92 int ret, done = 0;
93
94again:
95 ret = write(ctx->out_fds[j], data + done,
96 sizeof(data)-done);
97 if (ret < 0)
98 err(EXIT_FAILURE, "SENDER: write");
99 done += ret;
100 if (done < DATASIZE)
101 goto again;
102 }
103 }
104
105 return NULL;
106}
107
108
109/* One receiver per fd */
110static void *receiver(struct receiver_context* ctx)
111{
112 unsigned int i;
113
114 if (!thread_mode)
115 close(ctx->in_fds[1]);
116
117 /* Wait for start... */
118 ready(ctx->ready_out, ctx->wakefd);
119
120 /* Receive them all */
121 for (i = 0; i < ctx->num_packets; i++) {
122 char data[DATASIZE];
123 int ret, done = 0;
124
125again:
126 ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
127 if (ret < 0)
128 err(EXIT_FAILURE, "SERVER: read");
129 done += ret;
130 if (done < DATASIZE)
131 goto again;
132 }
133
134 return NULL;
135}
136
137static pthread_t create_worker(void *ctx, void *(*func)(void *))
138{
139 pthread_attr_t attr;
140 pthread_t childid;
141 int ret;
142
143 if (!thread_mode) {
144 /* process mode */
145 /* Fork the receiver. */
146 switch (fork()) {
147 case -1:
148 err(EXIT_FAILURE, "fork()");
149 break;
150 case 0:
151 (*func) (ctx);
152 exit(0);
153 break;
154 default:
155 break;
156 }
157
158 return (pthread_t)0;
159 }
160
161 if (pthread_attr_init(&attr) != 0)
162 err(EXIT_FAILURE, "pthread_attr_init:");
163
164#ifndef __ia64__
165 if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
166 err(EXIT_FAILURE, "pthread_attr_setstacksize");
167#endif
168
169 ret = pthread_create(&childid, &attr, func, ctx);
170 if (ret != 0)
171 err(EXIT_FAILURE, "pthread_create failed");
172
173 return childid;
174}
175
176static void reap_worker(pthread_t id)
177{
178 int proc_status;
179 void *thread_status;
180
181 if (!thread_mode) {
182 /* process mode */
183 wait(&proc_status);
184 if (!WIFEXITED(proc_status))
185 exit(1);
186 } else {
187 pthread_join(id, &thread_status);
188 }
189}
190
191/* One group of senders and receivers */
192static unsigned int group(pthread_t *pth,
193 unsigned int num_fds,
194 int ready_out,
195 int wakefd)
196{
197 unsigned int i;
198 struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
199 + num_fds * sizeof(int));
200
201 if (!snd_ctx)
202 err(EXIT_FAILURE, "malloc()");
203
204 for (i = 0; i < num_fds; i++) {
205 int fds[2];
206 struct receiver_context *ctx = malloc(sizeof(*ctx));
207
208 if (!ctx)
209 err(EXIT_FAILURE, "malloc()");
210
211
212 /* Create the pipe between client and server */
213 fdpair(fds);
214
215 ctx->num_packets = num_fds * nr_loops;
216 ctx->in_fds[0] = fds[0];
217 ctx->in_fds[1] = fds[1];
218 ctx->ready_out = ready_out;
219 ctx->wakefd = wakefd;
220
221 pth[i] = create_worker(ctx, (void *)receiver);
222
223 snd_ctx->out_fds[i] = fds[1];
224 if (!thread_mode)
225 close(fds[0]);
226 }
227
228 /* Now we have all the fds, fork the senders */
229 for (i = 0; i < num_fds; i++) {
230 snd_ctx->ready_out = ready_out;
231 snd_ctx->wakefd = wakefd;
232 snd_ctx->num_fds = num_fds;
233
234 pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
235 }
236
237 /* Close the fds we have left */
238 if (!thread_mode)
239 for (i = 0; i < num_fds; i++)
240 close(snd_ctx->out_fds[i]);
241
242 /* Return number of children to reap */
243 return num_fds * 2;
244}
245
246static const struct option options[] = {
247 OPT_BOOLEAN('p', "pipe", &use_pipes,
248 "Use pipe() instead of socketpair()"),
249 OPT_BOOLEAN('t', "thread", &thread_mode,
250 "Be multi thread instead of multi process"),
251 OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
252 OPT_UINTEGER('l', "nr_loops", &nr_loops, "Specify the number of loops to run (default: 100)"),
253 OPT_END()
254};
255
256static const char * const bench_sched_message_usage[] = {
257 "perf bench sched messaging <options>",
258 NULL
259};
260
261int bench_sched_messaging(int argc, const char **argv)
262{
263 unsigned int i, total_children;
264 struct timeval start, stop, diff;
265 unsigned int num_fds = 20;
266 int readyfds[2], wakefds[2];
267 char dummy;
268 pthread_t *pth_tab;
269
270 argc = parse_options(argc, argv, options,
271 bench_sched_message_usage, 0);
272
273 pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
274 if (!pth_tab)
275 err(EXIT_FAILURE, "main:malloc()");
276
277 fdpair(readyfds);
278 fdpair(wakefds);
279
280 total_children = 0;
281 for (i = 0; i < num_groups; i++)
282 total_children += group(pth_tab+total_children, num_fds,
283 readyfds[1], wakefds[0]);
284
285 /* Wait for everyone to be ready */
286 for (i = 0; i < total_children; i++)
287 if (read(readyfds[0], &dummy, 1) != 1)
288 err(EXIT_FAILURE, "Reading for readyfds");
289
290 gettimeofday(&start, NULL);
291
292 /* Kick them off */
293 if (write(wakefds[1], &dummy, 1) != 1)
294 err(EXIT_FAILURE, "Writing to start them");
295
296 /* Reap them all */
297 for (i = 0; i < total_children; i++)
298 reap_worker(pth_tab[i]);
299
300 gettimeofday(&stop, NULL);
301
302 timersub(&stop, &start, &diff);
303
304 switch (bench_format) {
305 case BENCH_FORMAT_DEFAULT:
306 printf("# %d sender and receiver %s per group\n",
307 num_fds, thread_mode ? "threads" : "processes");
308 printf("# %d groups == %d %s run\n\n",
309 num_groups, num_groups * 2 * num_fds,
310 thread_mode ? "threads" : "processes");
311 printf(" %14s: %lu.%03lu [sec]\n", "Total time",
312 (unsigned long) diff.tv_sec,
313 (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
314 break;
315 case BENCH_FORMAT_SIMPLE:
316 printf("%lu.%03lu\n", (unsigned long) diff.tv_sec,
317 (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
318 break;
319 default:
320 /* reaching here is something disaster */
321 fprintf(stderr, "Unknown format:%d\n", bench_format);
322 exit(1);
323 break;
324 }
325
326 free(pth_tab);
327
328 return 0;
329}