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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 __maybe_unused)
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/list.h>
31#include <linux/time64.h>
32
33#define DATASIZE 100
34
35static bool use_pipes = false;
36static unsigned int nr_loops = 100;
37static bool thread_mode = false;
38static unsigned int num_groups = 10;
39static unsigned int total_children = 0;
40static struct list_head sender_contexts = LIST_HEAD_INIT(sender_contexts);
41static struct list_head receiver_contexts = LIST_HEAD_INIT(receiver_contexts);
42
43struct sender_context {
44 struct list_head list;
45 unsigned int num_fds;
46 int ready_out;
47 int wakefd;
48 int out_fds[];
49};
50
51struct receiver_context {
52 struct list_head list;
53 unsigned int num_packets;
54 int in_fds[2];
55 int ready_out;
56 int wakefd;
57};
58
59union messaging_worker {
60 pthread_t thread;
61 pid_t pid;
62};
63
64static union messaging_worker *worker_tab;
65
66static void fdpair(int fds[2])
67{
68 if (use_pipes) {
69 if (pipe(fds) == 0)
70 return;
71 } else {
72 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
73 return;
74 }
75
76 err(EXIT_FAILURE, use_pipes ? "pipe()" : "socketpair()");
77}
78
79/* Block until we're ready to go */
80static void ready(int ready_out, int wakefd)
81{
82 struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
83
84 /* Tell them we're ready. */
85 if (write(ready_out, "R", 1) != 1)
86 err(EXIT_FAILURE, "CLIENT: ready write");
87
88 /* Wait for "GO" signal */
89 if (poll(&pollfd, 1, -1) != 1)
90 err(EXIT_FAILURE, "poll");
91}
92
93/* Sender sprays nr_loops messages down each file descriptor */
94static void *sender(struct sender_context *ctx)
95{
96 char data[DATASIZE];
97 unsigned int i, j;
98
99 ready(ctx->ready_out, ctx->wakefd);
100 memset(data, 'S', sizeof(data));
101
102 /* Now pump to every receiver. */
103 for (i = 0; i < nr_loops; i++) {
104 for (j = 0; j < ctx->num_fds; j++) {
105 int ret, done = 0;
106
107again:
108 ret = write(ctx->out_fds[j], data + done,
109 sizeof(data) - done);
110 if (ret < 0)
111 err(EXIT_FAILURE, "SENDER: write");
112 done += ret;
113 if (done < DATASIZE)
114 goto again;
115 }
116 }
117
118 return NULL;
119}
120
121
122/* One receiver per fd */
123static void *receiver(struct receiver_context* ctx)
124{
125 unsigned int i;
126
127 if (!thread_mode)
128 close(ctx->in_fds[1]);
129
130 /* Wait for start... */
131 ready(ctx->ready_out, ctx->wakefd);
132
133 /* Receive them all */
134 for (i = 0; i < ctx->num_packets; i++) {
135 char data[DATASIZE];
136 int ret, done = 0;
137
138again:
139 ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
140 if (ret < 0)
141 err(EXIT_FAILURE, "SERVER: read");
142 done += ret;
143 if (done < DATASIZE)
144 goto again;
145 }
146
147 return NULL;
148}
149
150static void create_thread_worker(union messaging_worker *worker,
151 void *ctx, void *(*func)(void *))
152{
153 pthread_attr_t attr;
154 int ret;
155
156 if (pthread_attr_init(&attr) != 0)
157 err(EXIT_FAILURE, "pthread_attr_init:");
158
159#ifndef __ia64__
160 if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
161 err(EXIT_FAILURE, "pthread_attr_setstacksize");
162#endif
163
164 ret = pthread_create(&worker->thread, &attr, func, ctx);
165 if (ret != 0)
166 err(EXIT_FAILURE, "pthread_create failed");
167
168 pthread_attr_destroy(&attr);
169}
170
171static void create_process_worker(union messaging_worker *worker,
172 void *ctx, void *(*func)(void *))
173{
174 /* Fork the receiver. */
175 worker->pid = fork();
176
177 if (worker->pid == -1) {
178 err(EXIT_FAILURE, "fork()");
179 } else if (worker->pid == 0) {
180 (*func) (ctx);
181 exit(0);
182 }
183}
184
185static void create_worker(union messaging_worker *worker,
186 void *ctx, void *(*func)(void *))
187{
188 if (!thread_mode)
189 return create_process_worker(worker, ctx, func);
190 else
191 return create_thread_worker(worker, ctx, func);
192}
193
194static void reap_worker(union messaging_worker *worker)
195{
196 int proc_status;
197 void *thread_status;
198
199 if (!thread_mode) {
200 /* process mode */
201 wait(&proc_status);
202 if (!WIFEXITED(proc_status))
203 exit(1);
204 } else {
205 pthread_join(worker->thread, &thread_status);
206 }
207}
208
209/* One group of senders and receivers */
210static unsigned int group(union messaging_worker *worker,
211 unsigned int num_fds,
212 int ready_out,
213 int wakefd)
214{
215 unsigned int i;
216 struct sender_context *snd_ctx = malloc(sizeof(struct sender_context) +
217 num_fds * sizeof(int));
218
219 if (!snd_ctx)
220 err(EXIT_FAILURE, "malloc()");
221
222 list_add(&snd_ctx->list, &sender_contexts);
223 for (i = 0; i < num_fds; i++) {
224 int fds[2];
225 struct receiver_context *ctx = malloc(sizeof(*ctx));
226
227 if (!ctx)
228 err(EXIT_FAILURE, "malloc()");
229
230 list_add(&ctx->list, &receiver_contexts);
231
232 /* Create the pipe between client and server */
233 fdpair(fds);
234
235 ctx->num_packets = num_fds * nr_loops;
236 ctx->in_fds[0] = fds[0];
237 ctx->in_fds[1] = fds[1];
238 ctx->ready_out = ready_out;
239 ctx->wakefd = wakefd;
240
241 create_worker(worker + i, ctx, (void *)receiver);
242
243 snd_ctx->out_fds[i] = fds[1];
244 if (!thread_mode)
245 close(fds[0]);
246 }
247
248 /* Now we have all the fds, fork the senders */
249 for (i = 0; i < num_fds; i++) {
250 snd_ctx->ready_out = ready_out;
251 snd_ctx->wakefd = wakefd;
252 snd_ctx->num_fds = num_fds;
253
254 create_worker(worker + num_fds + i, snd_ctx, (void *)sender);
255 }
256
257 /* Close the fds we have left */
258 if (!thread_mode)
259 for (i = 0; i < num_fds; i++)
260 close(snd_ctx->out_fds[i]);
261
262 /* Return number of children to reap */
263 return num_fds * 2;
264}
265
266static void sig_handler(int sig __maybe_unused)
267{
268 unsigned int i;
269
270 /*
271 * When exit abnormally, kill all forked child processes.
272 */
273 for (i = 0; i < total_children; i++)
274 kill(worker_tab[i].pid, SIGKILL);
275}
276
277static const struct option options[] = {
278 OPT_BOOLEAN('p', "pipe", &use_pipes,
279 "Use pipe() instead of socketpair()"),
280 OPT_BOOLEAN('t', "thread", &thread_mode,
281 "Be multi thread instead of multi process"),
282 OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
283 OPT_UINTEGER('l', "nr_loops", &nr_loops, "Specify the number of loops to run (default: 100)"),
284 OPT_END()
285};
286
287static const char * const bench_sched_message_usage[] = {
288 "perf bench sched messaging <options>",
289 NULL
290};
291
292int bench_sched_messaging(int argc, const char **argv)
293{
294 unsigned int i;
295 struct timeval start, stop, diff;
296 unsigned int num_fds = 20;
297 int readyfds[2], wakefds[2];
298 char dummy;
299 struct sender_context *pos, *n;
300
301 argc = parse_options(argc, argv, options,
302 bench_sched_message_usage, 0);
303
304 worker_tab = malloc(num_fds * 2 * num_groups * sizeof(union messaging_worker));
305 if (!worker_tab)
306 err(EXIT_FAILURE, "main:malloc()");
307
308 fdpair(readyfds);
309 fdpair(wakefds);
310
311 if (!thread_mode) {
312 signal(SIGINT, sig_handler);
313 signal(SIGTERM, sig_handler);
314 }
315
316 for (i = 0; i < num_groups; i++)
317 total_children += group(worker_tab + total_children, num_fds,
318 readyfds[1], wakefds[0]);
319
320 /* Wait for everyone to be ready */
321 for (i = 0; i < total_children; i++)
322 if (read(readyfds[0], &dummy, 1) != 1)
323 err(EXIT_FAILURE, "Reading for readyfds");
324
325 gettimeofday(&start, NULL);
326
327 /* Kick them off */
328 if (write(wakefds[1], &dummy, 1) != 1)
329 err(EXIT_FAILURE, "Writing to start them");
330
331 /* Reap them all */
332 for (i = 0; i < total_children; i++)
333 reap_worker(worker_tab + i);
334
335 gettimeofday(&stop, NULL);
336
337 timersub(&stop, &start, &diff);
338
339 switch (bench_format) {
340 case BENCH_FORMAT_DEFAULT:
341 printf("# %d sender and receiver %s per group\n",
342 num_fds, thread_mode ? "threads" : "processes");
343 printf("# %d groups == %d %s run\n\n",
344 num_groups, num_groups * 2 * num_fds,
345 thread_mode ? "threads" : "processes");
346 printf(" %14s: %lu.%03lu [sec]\n", "Total time",
347 (unsigned long) diff.tv_sec,
348 (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
349 break;
350 case BENCH_FORMAT_SIMPLE:
351 printf("%lu.%03lu\n", (unsigned long) diff.tv_sec,
352 (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
353 break;
354 default:
355 /* reaching here is something disaster */
356 fprintf(stderr, "Unknown format:%d\n", bench_format);
357 exit(1);
358 break;
359 }
360
361 free(worker_tab);
362 list_for_each_entry_safe(pos, n, &sender_contexts, list) {
363 list_del_init(&pos->list);
364 free(pos);
365 }
366 list_for_each_entry_safe(pos, n, &receiver_contexts, list) {
367 list_del_init(&pos->list);
368 free(pos);
369 }
370 return 0;
371}