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12#include "../perf.h"
13#include "../util/util.h"
14#include <subcmd/parse-options.h>
15#include "../builtin.h"
16#include "bench.h"
17
18
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 <poll.h>
30#include <limits.h>
31#include <err.h>
32#include <linux/time64.h>
33
34#define DATASIZE 100
35
36static bool use_pipes = false;
37static unsigned int nr_loops = 100;
38static bool thread_mode = false;
39static unsigned int num_groups = 10;
40
41struct sender_context {
42 unsigned int num_fds;
43 int ready_out;
44 int wakefd;
45 int out_fds[0];
46};
47
48struct receiver_context {
49 unsigned int num_packets;
50 int in_fds[2];
51 int ready_out;
52 int wakefd;
53};
54
55static void fdpair(int fds[2])
56{
57 if (use_pipes) {
58 if (pipe(fds) == 0)
59 return;
60 } else {
61 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
62 return;
63 }
64
65 err(EXIT_FAILURE, use_pipes ? "pipe()" : "socketpair()");
66}
67
68
69static void ready(int ready_out, int wakefd)
70{
71 char dummy;
72 struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
73
74
75 if (write(ready_out, &dummy, 1) != 1)
76 err(EXIT_FAILURE, "CLIENT: ready write");
77
78
79 if (poll(&pollfd, 1, -1) != 1)
80 err(EXIT_FAILURE, "poll");
81}
82
83
84static void *sender(struct sender_context *ctx)
85{
86 char data[DATASIZE];
87 unsigned int i, j;
88
89 ready(ctx->ready_out, ctx->wakefd);
90
91
92 for (i = 0; i < nr_loops; i++) {
93 for (j = 0; j < ctx->num_fds; j++) {
94 int ret, done = 0;
95
96again:
97 ret = write(ctx->out_fds[j], data + done,
98 sizeof(data)-done);
99 if (ret < 0)
100 err(EXIT_FAILURE, "SENDER: write");
101 done += ret;
102 if (done < DATASIZE)
103 goto again;
104 }
105 }
106
107 return NULL;
108}
109
110
111
112static void *receiver(struct receiver_context* ctx)
113{
114 unsigned int i;
115
116 if (!thread_mode)
117 close(ctx->in_fds[1]);
118
119
120 ready(ctx->ready_out, ctx->wakefd);
121
122
123 for (i = 0; i < ctx->num_packets; i++) {
124 char data[DATASIZE];
125 int ret, done = 0;
126
127again:
128 ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
129 if (ret < 0)
130 err(EXIT_FAILURE, "SERVER: read");
131 done += ret;
132 if (done < DATASIZE)
133 goto again;
134 }
135
136 return NULL;
137}
138
139static pthread_t create_worker(void *ctx, void *(*func)(void *))
140{
141 pthread_attr_t attr;
142 pthread_t childid;
143 int ret;
144
145 if (!thread_mode) {
146
147
148 switch (fork()) {
149 case -1:
150 err(EXIT_FAILURE, "fork()");
151 break;
152 case 0:
153 (*func) (ctx);
154 exit(0);
155 break;
156 default:
157 break;
158 }
159
160 return (pthread_t)0;
161 }
162
163 if (pthread_attr_init(&attr) != 0)
164 err(EXIT_FAILURE, "pthread_attr_init:");
165
166#ifndef __ia64__
167 if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
168 err(EXIT_FAILURE, "pthread_attr_setstacksize");
169#endif
170
171 ret = pthread_create(&childid, &attr, func, ctx);
172 if (ret != 0)
173 err(EXIT_FAILURE, "pthread_create failed");
174
175 return childid;
176}
177
178static void reap_worker(pthread_t id)
179{
180 int proc_status;
181 void *thread_status;
182
183 if (!thread_mode) {
184
185 wait(&proc_status);
186 if (!WIFEXITED(proc_status))
187 exit(1);
188 } else {
189 pthread_join(id, &thread_status);
190 }
191}
192
193
194static unsigned int group(pthread_t *pth,
195 unsigned int num_fds,
196 int ready_out,
197 int wakefd)
198{
199 unsigned int i;
200 struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
201 + num_fds * sizeof(int));
202
203 if (!snd_ctx)
204 err(EXIT_FAILURE, "malloc()");
205
206 for (i = 0; i < num_fds; i++) {
207 int fds[2];
208 struct receiver_context *ctx = malloc(sizeof(*ctx));
209
210 if (!ctx)
211 err(EXIT_FAILURE, "malloc()");
212
213
214
215 fdpair(fds);
216
217 ctx->num_packets = num_fds * nr_loops;
218 ctx->in_fds[0] = fds[0];
219 ctx->in_fds[1] = fds[1];
220 ctx->ready_out = ready_out;
221 ctx->wakefd = wakefd;
222
223 pth[i] = create_worker(ctx, (void *)receiver);
224
225 snd_ctx->out_fds[i] = fds[1];
226 if (!thread_mode)
227 close(fds[0]);
228 }
229
230
231 for (i = 0; i < num_fds; i++) {
232 snd_ctx->ready_out = ready_out;
233 snd_ctx->wakefd = wakefd;
234 snd_ctx->num_fds = num_fds;
235
236 pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
237 }
238
239
240 if (!thread_mode)
241 for (i = 0; i < num_fds; i++)
242 close(snd_ctx->out_fds[i]);
243
244
245 return num_fds * 2;
246}
247
248static const struct option options[] = {
249 OPT_BOOLEAN('p', "pipe", &use_pipes,
250 "Use pipe() instead of socketpair()"),
251 OPT_BOOLEAN('t', "thread", &thread_mode,
252 "Be multi thread instead of multi process"),
253 OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
254 OPT_UINTEGER('l', "nr_loops", &nr_loops, "Specify the number of loops to run (default: 100)"),
255 OPT_END()
256};
257
258static const char * const bench_sched_message_usage[] = {
259 "perf bench sched messaging <options>",
260 NULL
261};
262
263int bench_sched_messaging(int argc, const char **argv,
264 const char *prefix __maybe_unused)
265{
266 unsigned int i, total_children;
267 struct timeval start, stop, diff;
268 unsigned int num_fds = 20;
269 int readyfds[2], wakefds[2];
270 char dummy;
271 pthread_t *pth_tab;
272
273 argc = parse_options(argc, argv, options,
274 bench_sched_message_usage, 0);
275
276 pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
277 if (!pth_tab)
278 err(EXIT_FAILURE, "main:malloc()");
279
280 fdpair(readyfds);
281 fdpair(wakefds);
282
283 total_children = 0;
284 for (i = 0; i < num_groups; i++)
285 total_children += group(pth_tab+total_children, num_fds,
286 readyfds[1], wakefds[0]);
287
288
289 for (i = 0; i < total_children; i++)
290 if (read(readyfds[0], &dummy, 1) != 1)
291 err(EXIT_FAILURE, "Reading for readyfds");
292
293 gettimeofday(&start, NULL);
294
295
296 if (write(wakefds[1], &dummy, 1) != 1)
297 err(EXIT_FAILURE, "Writing to start them");
298
299
300 for (i = 0; i < total_children; i++)
301 reap_worker(pth_tab[i]);
302
303 gettimeofday(&stop, NULL);
304
305 timersub(&stop, &start, &diff);
306
307 switch (bench_format) {
308 case BENCH_FORMAT_DEFAULT:
309 printf("# %d sender and receiver %s per group\n",
310 num_fds, thread_mode ? "threads" : "processes");
311 printf("# %d groups == %d %s run\n\n",
312 num_groups, num_groups * 2 * num_fds,
313 thread_mode ? "threads" : "processes");
314 printf(" %14s: %lu.%03lu [sec]\n", "Total time",
315 diff.tv_sec,
316 (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
317 break;
318 case BENCH_FORMAT_SIMPLE:
319 printf("%lu.%03lu\n", diff.tv_sec,
320 (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
321 break;
322 default:
323
324 fprintf(stderr, "Unknown format:%d\n", bench_format);
325 exit(1);
326 break;
327 }
328
329 free(pth_tab);
330
331 return 0;
332}
333
