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13#include "../perf.h"
14#include "../util/util.h"
15#include <subcmd/parse-options.h>
16#include "../builtin.h"
17#include "bench.h"
18
19
20#include <pthread.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <errno.h>
25#include <unistd.h>
26#include <sys/types.h>
27#include <sys/socket.h>
28#include <sys/wait.h>
29#include <sys/time.h>
30#include <poll.h>
31#include <limits.h>
32#include <err.h>
33#include <linux/time64.h>
34
35#define DATASIZE 100
36
37static bool use_pipes = false;
38static unsigned int nr_loops = 100;
39static bool thread_mode = false;
40static unsigned int num_groups = 10;
41
42struct sender_context {
43 unsigned int num_fds;
44 int ready_out;
45 int wakefd;
46 int out_fds[0];
47};
48
49struct receiver_context {
50 unsigned int num_packets;
51 int in_fds[2];
52 int ready_out;
53 int wakefd;
54};
55
56static void fdpair(int fds[2])
57{
58 if (use_pipes) {
59 if (pipe(fds) == 0)
60 return;
61 } else {
62 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
63 return;
64 }
65
66 err(EXIT_FAILURE, use_pipes ? "pipe()" : "socketpair()");
67}
68
69
70static void ready(int ready_out, int wakefd)
71{
72 char dummy;
73 struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
74
75
76 if (write(ready_out, &dummy, 1) != 1)
77 err(EXIT_FAILURE, "CLIENT: ready write");
78
79
80 if (poll(&pollfd, 1, -1) != 1)
81 err(EXIT_FAILURE, "poll");
82}
83
84
85static void *sender(struct sender_context *ctx)
86{
87 char data[DATASIZE];
88 unsigned int i, j;
89
90 ready(ctx->ready_out, ctx->wakefd);
91
92
93 for (i = 0; i < nr_loops; i++) {
94 for (j = 0; j < ctx->num_fds; j++) {
95 int ret, done = 0;
96
97again:
98 ret = write(ctx->out_fds[j], data + done,
99 sizeof(data)-done);
100 if (ret < 0)
101 err(EXIT_FAILURE, "SENDER: write");
102 done += ret;
103 if (done < DATASIZE)
104 goto again;
105 }
106 }
107
108 return NULL;
109}
110
111
112
113static void *receiver(struct receiver_context* ctx)
114{
115 unsigned int i;
116
117 if (!thread_mode)
118 close(ctx->in_fds[1]);
119
120
121 ready(ctx->ready_out, ctx->wakefd);
122
123
124 for (i = 0; i < ctx->num_packets; i++) {
125 char data[DATASIZE];
126 int ret, done = 0;
127
128again:
129 ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
130 if (ret < 0)
131 err(EXIT_FAILURE, "SERVER: read");
132 done += ret;
133 if (done < DATASIZE)
134 goto again;
135 }
136
137 return NULL;
138}
139
140static pthread_t create_worker(void *ctx, void *(*func)(void *))
141{
142 pthread_attr_t attr;
143 pthread_t childid;
144 int ret;
145
146 if (!thread_mode) {
147
148
149 switch (fork()) {
150 case -1:
151 err(EXIT_FAILURE, "fork()");
152 break;
153 case 0:
154 (*func) (ctx);
155 exit(0);
156 break;
157 default:
158 break;
159 }
160
161 return (pthread_t)0;
162 }
163
164 if (pthread_attr_init(&attr) != 0)
165 err(EXIT_FAILURE, "pthread_attr_init:");
166
167#ifndef __ia64__
168 if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
169 err(EXIT_FAILURE, "pthread_attr_setstacksize");
170#endif
171
172 ret = pthread_create(&childid, &attr, func, ctx);
173 if (ret != 0)
174 err(EXIT_FAILURE, "pthread_create failed");
175
176 return childid;
177}
178
179static void reap_worker(pthread_t id)
180{
181 int proc_status;
182 void *thread_status;
183
184 if (!thread_mode) {
185
186 wait(&proc_status);
187 if (!WIFEXITED(proc_status))
188 exit(1);
189 } else {
190 pthread_join(id, &thread_status);
191 }
192}
193
194
195static unsigned int group(pthread_t *pth,
196 unsigned int num_fds,
197 int ready_out,
198 int wakefd)
199{
200 unsigned int i;
201 struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
202 + num_fds * sizeof(int));
203
204 if (!snd_ctx)
205 err(EXIT_FAILURE, "malloc()");
206
207 for (i = 0; i < num_fds; i++) {
208 int fds[2];
209 struct receiver_context *ctx = malloc(sizeof(*ctx));
210
211 if (!ctx)
212 err(EXIT_FAILURE, "malloc()");
213
214
215
216 fdpair(fds);
217
218 ctx->num_packets = num_fds * nr_loops;
219 ctx->in_fds[0] = fds[0];
220 ctx->in_fds[1] = fds[1];
221 ctx->ready_out = ready_out;
222 ctx->wakefd = wakefd;
223
224 pth[i] = create_worker(ctx, (void *)receiver);
225
226 snd_ctx->out_fds[i] = fds[1];
227 if (!thread_mode)
228 close(fds[0]);
229 }
230
231
232 for (i = 0; i < num_fds; i++) {
233 snd_ctx->ready_out = ready_out;
234 snd_ctx->wakefd = wakefd;
235 snd_ctx->num_fds = num_fds;
236
237 pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
238 }
239
240
241 if (!thread_mode)
242 for (i = 0; i < num_fds; i++)
243 close(snd_ctx->out_fds[i]);
244
245
246 return num_fds * 2;
247}
248
249static const struct option options[] = {
250 OPT_BOOLEAN('p', "pipe", &use_pipes,
251 "Use pipe() instead of socketpair()"),
252 OPT_BOOLEAN('t', "thread", &thread_mode,
253 "Be multi thread instead of multi process"),
254 OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
255 OPT_UINTEGER('l', "nr_loops", &nr_loops, "Specify the number of loops to run (default: 100)"),
256 OPT_END()
257};
258
259static const char * const bench_sched_message_usage[] = {
260 "perf bench sched messaging <options>",
261 NULL
262};
263
264int bench_sched_messaging(int argc, const char **argv)
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
