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1 #include <AvailabilityMacros.h>
2 #include <mach/thread_policy.h>
3
4 #include <pthread.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 #include <err.h>
9 #include <unistd.h>
10
11 #include <pthread.h>
12 #include <mach/mach.h>
13 #include <mach/mach_error.h>
14 #include <mach/notify.h>
15 #include <servers/bootstrap.h>
16 #include <sys/event.h>
17 #include <sys/select.h>
18 #include <sys/types.h>
19 #include <sys/time.h>
20 #include <sys/signal.h>
21
22 #define MAX(A, B) ((A) < (B) ? (B) : (A))
23
24
25 typedef struct {
26 mach_msg_header_t header;
27 mach_msg_trailer_t trailer; // subtract this when sending
28 } ipc_trivial_message;
29
30 typedef struct {
31 mach_msg_header_t header;
32 u_int32_t numbers[0];
33 mach_msg_trailer_t trailer; // subtract this when sending
34 } ipc_inline_message;
35
36 typedef struct {
37 mach_msg_header_t header;
38 mach_msg_body_t body;
39 mach_msg_ool_descriptor_t descriptor;
40 mach_msg_trailer_t trailer; // subtract this when sending
41 } ipc_complex_message;
42
43 enum {
44 msg_type_trivial = 0,
45 msg_type_inline = 1,
46 msg_type_complex = 2
47 };
48
49 struct port_args {
50 int server_num;
51 int req_size;
52 mach_msg_header_t *req_msg;
53 int reply_size;
54 mach_msg_header_t *reply_msg;
55 mach_port_t port;
56 mach_port_t pset;
57 };
58
59 typedef union {
60 pid_t pid;
61 pthread_t tid;
62 } thread_id_t;
63
64 /* Global options */
65 static boolean_t verbose = FALSE;
66 static boolean_t affinity = FALSE;
67 static boolean_t timeshare = FALSE;
68 static boolean_t threaded = FALSE;
69 static boolean_t oneway = FALSE;
70 static boolean_t do_select = FALSE;
71 int msg_type;
72 int num_ints;
73 int num_msgs;
74 int num_clients;
75 int num_servers;
76 int client_delay;
77 int client_spin;
78 int client_pages;
79 char **server_port_name;
80
81 void signal_handler(int sig) {
82 }
83
84 void usage(const char *progname) {
85 fprintf(stderr, "usage: %s [options]\n", progname);
86 fprintf(stderr, "where options are:\n");
87 fprintf(stderr, " -affinity\t\tthreads use affinity\n");
88 fprintf(stderr, " -timeshare\t\tthreads use timeshare\n");
89 fprintf(stderr, " -threaded\t\tuse (p)threads\n");
90 fprintf(stderr, " -verbose\t\tbe verbose\n");
91 fprintf(stderr, " -oneway\t\tdo not request return reply\n");
92 fprintf(stderr, " -count num\t\tnumber of messages to send\n");
93 fprintf(stderr, " -type trivial|inline|complex\ttype of messages to send\n");
94 fprintf(stderr, " -numints num\tnumber of 32-bit ints to send in messages\n");
95 fprintf(stderr, " -servers num\tnumber of servers threads to run\n");
96 fprintf(stderr, " -clients num\tnumber of clients per server\n");
97 fprintf(stderr, " -delay num\t\tmicroseconds to sleep clients between messages\n");
98 fprintf(stderr, " -work num\t\tmicroseconds of client work\n");
99 fprintf(stderr, " -pages num\t\tpages of memory touched by client work\n");
100 fprintf(stderr, " -select \t\tselect prior to calling kevent().\n");
101 fprintf(stderr, "default values are:\n");
102 fprintf(stderr, " . no affinity\n");
103 fprintf(stderr, " . not timeshare\n");
104 fprintf(stderr, " . not verbose\n");
105 fprintf(stderr, " . not oneway\n");
106 fprintf(stderr, " . client sends 100000 messages\n");
107 fprintf(stderr, " . inline message type\n");
108 fprintf(stderr, " . 64 32-bit integers in inline/complex messages\n");
109 fprintf(stderr, " . (num_available_processors+1)%%2 servers\n");
110 fprintf(stderr, " . 4 clients per server\n");
111 fprintf(stderr, " . no delay\n");
112 exit(1);
113 }
114
115 void parse_args(int argc, char *argv[]) {
116 host_basic_info_data_t info;
117 mach_msg_type_number_t count;
118 kern_return_t result;
119
120 /* Initialize defaults */
121 msg_type = msg_type_trivial;
122 num_ints = 64;
123 num_msgs = 100000;
124 client_delay = 0;
125 num_clients = 4;
126
127 count = HOST_BASIC_INFO_COUNT;
128 result = host_info(mach_host_self(), HOST_BASIC_INFO,
129 (host_info_t)&info, &count);
130 if (result == KERN_SUCCESS && info.avail_cpus > 1)
131 num_servers = info.avail_cpus / 2;
132 else
133 num_servers = 1;
134
135 const char *progname = argv[0];
136 argc--; argv++;
137 while (0 < argc) {
138 if (0 == strcmp("-verbose", argv[0])) {
139 verbose = TRUE;
140 argc--; argv++;
141 } else if (0 == strcmp("-affinity", argv[0])) {
142 affinity = TRUE;
143 argc--; argv++;
144 } else if (0 == strcmp("-timeshare", argv[0])) {
145 timeshare = TRUE;
146 argc--; argv++;
147 } else if (0 == strcmp("-threaded", argv[0])) {
148 threaded = TRUE;
149 argc--; argv++;
150 } else if (0 == strcmp("-oneway", argv[0])) {
151 oneway = TRUE;
152 argc--; argv++;
153 } else if (0 == strcmp("-type", argv[0])) {
154 if (argc < 2)
155 usage(progname);
156 if (0 == strcmp("trivial", argv[1])) {
157 msg_type = msg_type_trivial;
158 } else if (0 == strcmp("inline", argv[1])) {
159 msg_type = msg_type_inline;
160 } else if (0 == strcmp("complex", argv[1])) {
161 msg_type = msg_type_complex;
162 } else
163 usage(progname);
164 argc -= 2; argv += 2;
165 } else if (0 == strcmp("-numints", argv[0])) {
166 if (argc < 2)
167 usage(progname);
168 num_ints = strtoul(argv[1], NULL, 0);
169 argc -= 2; argv += 2;
170 } else if (0 == strcmp("-count", argv[0])) {
171 if (argc < 2)
172 usage(progname);
173 num_msgs = strtoul(argv[1], NULL, 0);
174 argc -= 2; argv += 2;
175 } else if (0 == strcmp("-clients", argv[0])) {
176 if (argc < 2)
177 usage(progname);
178 num_clients = strtoul(argv[1], NULL, 0);
179 argc -= 2; argv += 2;
180 } else if (0 == strcmp("-servers", argv[0])) {
181 if (argc < 2)
182 usage(progname);
183 num_servers = strtoul(argv[1], NULL, 0);
184 argc -= 2; argv += 2;
185 } else if (0 == strcmp("-delay", argv[0])) {
186 if (argc < 2)
187 usage(progname);
188 client_delay = strtoul(argv[1], NULL, 0);
189 argc -= 2; argv += 2;
190 } else if (0 == strcmp("-spin", argv[0])) {
191 if (argc < 2)
192 usage(progname);
193 client_spin = strtoul(argv[1], NULL, 0);
194 argc -= 2; argv += 2;
195 } else if (0 == strcmp("-pages", argv[0])) {
196 if (argc < 2)
197 usage(progname);
198 client_pages = strtoul(argv[1], NULL, 0);
199 argc -= 2; argv += 2;
200 } else if (0 == strcmp("-select", argv[0])) {
201 do_select = TRUE;
202 argc--; argv++;
203 } else
204 usage(progname);
205 }
206 }
207
208 void setup_server_ports(struct port_args *ports)
209 {
210 kern_return_t ret = 0;
211 mach_port_t bsport;
212
213 ports->req_size = MAX(sizeof(ipc_inline_message) +
214 sizeof(u_int32_t) * num_ints,
215 sizeof(ipc_complex_message));
216 ports->reply_size = sizeof(ipc_trivial_message) -
217 sizeof(mach_msg_trailer_t);
218 ports->req_msg = malloc(ports->req_size);
219 ports->reply_msg = malloc(ports->reply_size);
220
221 ret = mach_port_allocate(mach_task_self(),
222 MACH_PORT_RIGHT_RECEIVE,
223 &(ports->port));
224 if (KERN_SUCCESS != ret) {
225 mach_error("mach_port_allocate(): ", ret);
226 exit(1);
227 }
228
229 ret = mach_port_allocate(mach_task_self(),
230 MACH_PORT_RIGHT_PORT_SET,
231 &(ports->pset));
232 if (KERN_SUCCESS != ret) {
233 mach_error("mach_port_allocate(): ", ret);
234 exit(1);
235 }
236
237 ret = mach_port_insert_member(mach_task_self(),
238 ports->port,
239 ports->pset);
240 if (KERN_SUCCESS != ret) {
241 mach_error("mach_port_insert_member(): ", ret);
242 exit(1);
243 }
244
245 ret = mach_port_insert_right(mach_task_self(),
246 ports->port,
247 ports->port,
248 MACH_MSG_TYPE_MAKE_SEND);
249 if (KERN_SUCCESS != ret) {
250 mach_error("mach_port_insert_right(): ", ret);
251 exit(1);
252 }
253
254 ret = task_get_bootstrap_port(mach_task_self(), &bsport);
255 if (KERN_SUCCESS != ret) {
256 mach_error("task_get_bootstrap_port(): ", ret);
257 exit(1);
258 }
259
260 if (verbose) {
261 printf("server waiting for IPC messages from client on port '%s'.\n",
262 server_port_name[ports->server_num]);
263 }
264 ret = bootstrap_register(bsport,
265 server_port_name[ports->server_num],
266 ports->port);
267 if (KERN_SUCCESS != ret) {
268 mach_error("bootstrap_register(): ", ret);
269 exit(1);
270 }
271 }
272
273 void setup_client_ports(struct port_args *ports)
274 {
275 kern_return_t ret = 0;
276 switch(msg_type) {
277 case msg_type_trivial:
278 ports->req_size = sizeof(ipc_trivial_message);
279 break;
280 case msg_type_inline:
281 ports->req_size = sizeof(ipc_inline_message) +
282 sizeof(u_int32_t) * num_ints;
283 break;
284 case msg_type_complex:
285 ports->req_size = sizeof(ipc_complex_message);
286 break;
287 }
288 ports->req_size -= sizeof(mach_msg_trailer_t);
289 ports->reply_size = sizeof(ipc_trivial_message);
290 ports->req_msg = malloc(ports->req_size);
291 ports->reply_msg = malloc(ports->reply_size);
292
293 ret = mach_port_allocate(mach_task_self(),
294 MACH_PORT_RIGHT_RECEIVE,
295 &(ports->port));
296 if (KERN_SUCCESS != ret) {
297 mach_error("mach_port_allocate(): ", ret);
298 exit(1);
299 }
300 if (verbose) {
301 printf("Client sending %d %s IPC messages to port '%s' in %s mode.\n",
302 num_msgs, (msg_type == msg_type_inline) ?
303 "inline" : ((msg_type == msg_type_complex) ?
304 "complex" : "trivial"),
305 server_port_name[ports->server_num],
306 (oneway ? "oneway" : "rpc"));
307 }
308
309 }
310
311
312 static void
313 thread_setup(int tag) {
314 kern_return_t ret;
315 thread_extended_policy_data_t epolicy;
316 thread_affinity_policy_data_t policy;
317
318 if (!timeshare) {
319 epolicy.timeshare = FALSE;
320 ret = thread_policy_set(
321 mach_thread_self(), THREAD_EXTENDED_POLICY,
322 (thread_policy_t) &epolicy,
323 THREAD_EXTENDED_POLICY_COUNT);
324 if (ret != KERN_SUCCESS)
325 printf("thread_policy_set(THREAD_EXTENDED_POLICY) returned %d\n", ret);
326 }
327
328 if (affinity) {
329 policy.affinity_tag = tag;
330 ret = thread_policy_set(
331 mach_thread_self(), THREAD_AFFINITY_POLICY,
332 (thread_policy_t) &policy,
333 THREAD_AFFINITY_POLICY_COUNT);
334 if (ret != KERN_SUCCESS)
335 printf("thread_policy_set(THREAD_AFFINITY_POLICY) returned %d\n", ret);
336 }
337 }
338
339 void *
340 server(void *serverarg)
341 {
342 int kq;
343 struct kevent64_s kev[1];
344 int err;
345 int count;
346 struct port_args args;
347 int idx;
348 kern_return_t ret;
349 int totalmsg = num_msgs * num_clients;
350 fd_set readfds;
351
352 args.server_num = (int) (long) serverarg;
353 setup_server_ports(&args);
354
355 thread_setup(args.server_num + 1);
356
357 kq = kqueue();
358 if (kq == -1) {
359 perror("kqueue");
360 exit(1);
361 }
362 EV_SET64(&kev[0], args.pset, EVFILT_MACHPORT, (EV_ADD | EV_CLEAR | EV_DISPATCH),
363 #if DIRECT_MSG_RCV
364 MACH_RCV_MSG|MACH_RCV_LARGE, 0, 0, (mach_vm_address_t)args.req_msg, args.req_size);
365 #else
366 0, 0, 0, 0, 0);
367 #endif
368 err = kevent64(kq, kev, 1, NULL, 0, 0, NULL);
369 if (err == -1) {
370 perror("kevent");
371 exit(1);
372 }
373
374 for (idx = 0; idx < totalmsg; idx++) {
375
376 if (verbose)
377 printf("server awaiting message %d\n", idx);
378 retry:
379 if (do_select) {
380 FD_ZERO(&readfds);
381 FD_SET(kq, &readfds);
382
383 if (verbose)
384 printf("Calling select() prior to kevent64().\n");
385
386 count = select(kq + 1, &readfds, NULL, NULL, NULL);
387 if (count == -1) {
388 perror("select");
389 exit(1);
390 }
391 }
392
393 EV_SET64(&kev[0], args.pset, EVFILT_MACHPORT, EV_ENABLE,
394 #if DIRECT_MSG_RCV
395 MACH_RCV_MSG|MACH_RCV_LARGE, 0, 0, (mach_vm_address_t)args.req_msg, args.req_size);
396 #else
397 0, 0, 0, 0, 0);
398 #endif
399 err = kevent64(kq, kev, 1, kev, 1, 0, NULL);
400 if (err == -1) {
401 perror("kevent64");
402 exit(1);
403 }
404 if (err == 0) {
405 // printf("kevent64: returned zero\n");
406 goto retry;
407 }
408
409 #if DIRECT_MSG_RCV
410 ret = kev[0].fflags;
411 if (MACH_MSG_SUCCESS != ret) {
412 if (verbose)
413 printf("kevent64() mach_msg_return=%d", ret);
414 mach_error("kevent64 (msg receive): ", ret);
415 exit(1);
416 }
417 #else
418 if (kev[0].data != args.port)
419 printf("kevent64(MACH_PORT_NULL) port name (%lld) != expected (0x%x)\n", kev[0].data, args.port);
420
421 args.req_msg->msgh_bits = 0;
422 args.req_msg->msgh_size = args.req_size;
423 args.req_msg->msgh_local_port = args.port;
424 ret = mach_msg(args.req_msg,
425 MACH_RCV_MSG|MACH_RCV_INTERRUPT|MACH_RCV_LARGE,
426 0,
427 args.req_size,
428 args.pset,
429 MACH_MSG_TIMEOUT_NONE,
430 MACH_PORT_NULL);
431 if (MACH_RCV_INTERRUPTED == ret)
432 break;
433 if (MACH_MSG_SUCCESS != ret) {
434 if (verbose)
435 printf("mach_msg() ret=%d", ret);
436 mach_error("mach_msg (receive): ", ret);
437 exit(1);
438 }
439 #endif
440 if (verbose)
441 printf("server received message %d\n", idx);
442 if (args.req_msg->msgh_bits & MACH_MSGH_BITS_COMPLEX) {
443 ret = vm_deallocate(mach_task_self(),
444 (vm_address_t)((ipc_complex_message *)args.req_msg)->descriptor.address,
445 ((ipc_complex_message *)args.req_msg)->descriptor.size);
446 }
447
448 if (1 == args.req_msg->msgh_id) {
449 if (verbose)
450 printf("server sending reply %d\n", idx);
451 args.reply_msg->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND,
452 MACH_MSG_TYPE_MAKE_SEND);
453 args.reply_msg->msgh_size = args.reply_size;
454 args.reply_msg->msgh_remote_port = args.req_msg->msgh_remote_port;
455 args.reply_msg->msgh_local_port = args.req_msg->msgh_local_port;
456 args.reply_msg->msgh_id = 2;
457 ret = mach_msg(args.reply_msg,
458 MACH_SEND_MSG,
459 args.reply_size,
460 0,
461 MACH_PORT_NULL,
462 MACH_MSG_TIMEOUT_NONE,
463 MACH_PORT_NULL);
464 if (MACH_MSG_SUCCESS != ret) {
465 mach_error("mach_msg (send): ", ret);
466 exit(1);
467 }
468 }
469 }
470 return NULL;
471 }
472
473 static inline void
474 client_spin_loop(unsigned count, void (fn)(void))
475 {
476 while (count--)
477 fn();
478 }
479
480 static long dummy_memory;
481 static long *client_memory = &dummy_memory;
482 static void
483 client_work_atom(void)
484 {
485 static int i;
486
487 if (++i > client_pages * PAGE_SIZE / sizeof(long))
488 i = 0;
489 client_memory[i] = 0;
490 }
491
492 static int calibration_count = 10000;
493 static int calibration_usec;
494 static void *
495 calibrate_client_work(void)
496 {
497 long dummy;
498 struct timeval nowtv;
499 struct timeval warmuptv = { 0, 100 * 1000 }; /* 100ms */
500 struct timeval starttv;
501 struct timeval endtv;
502
503 if (client_spin) {
504 /* Warm-up the stepper first... */
505 gettimeofday(&nowtv, NULL);
506 timeradd(&nowtv, &warmuptv, &endtv);
507 do {
508 client_spin_loop(calibration_count, client_work_atom);
509 gettimeofday(&nowtv, NULL);
510 } while (timercmp(&nowtv, &endtv, < ));
511
512 /* Now do the calibration */
513 while (TRUE) {
514 gettimeofday(&starttv, NULL);
515 client_spin_loop(calibration_count, client_work_atom);
516 gettimeofday(&endtv, NULL);
517 if (endtv.tv_sec - starttv.tv_sec > 1) {
518 calibration_count /= 10;
519 continue;
520 }
521 calibration_usec = endtv.tv_usec - starttv.tv_usec;
522 if (endtv.tv_usec < starttv.tv_usec) {
523 calibration_usec += 1000000;
524 }
525 if (calibration_usec < 1000) {
526 calibration_count *= 10;
527 continue;
528 }
529 calibration_count /= calibration_usec;
530 break;
531 }
532 if (verbose)
533 printf("calibration_count=%d calibration_usec=%d\n",
534 calibration_count, calibration_usec);
535 }
536 return NULL;
537 }
538
539 static void *
540 client_work(void)
541 {
542
543 if (client_spin) {
544 client_spin_loop(calibration_count*client_spin,
545 client_work_atom);
546 }
547
548 if (client_delay) {
549 usleep(client_delay);
550 }
551 return NULL;
552 }
553
554 void *client(void *threadarg)
555 {
556 struct port_args args;
557 int idx;
558 mach_msg_header_t *req, *reply;
559 mach_port_t bsport, servport;
560 kern_return_t ret;
561 int server_num = (int) threadarg;
562 void *ints = malloc(sizeof(u_int32_t) * num_ints);
563
564 if (verbose)
565 printf("client(%d) started, server port name %s\n",
566 server_num, server_port_name[server_num]);
567
568 args.server_num = server_num;
569 thread_setup(server_num + 1);
570
571 /* find server port */
572 ret = task_get_bootstrap_port(mach_task_self(), &bsport);
573 if (KERN_SUCCESS != ret) {
574 mach_error("task_get_bootstrap_port(): ", ret);
575 exit(1);
576 }
577 ret = bootstrap_look_up(bsport,
578 server_port_name[server_num],
579 &servport);
580 if (KERN_SUCCESS != ret) {
581 mach_error("bootstrap_look_up(): ", ret);
582 exit(1);
583 }
584
585 setup_client_ports(&args);
586
587 /* Allocate and touch memory */
588 if (client_pages) {
589 unsigned i;
590 client_memory = (long *) malloc(client_pages * PAGE_SIZE);
591 for (i = 0; i < client_pages; i++)
592 client_memory[i * PAGE_SIZE / sizeof(long)] = 0;
593 }
594
595 /* start message loop */
596 for (idx = 0; idx < num_msgs; idx++) {
597 req = args.req_msg;
598 reply = args.reply_msg;
599
600 req->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND,
601 MACH_MSG_TYPE_MAKE_SEND);
602 req->msgh_size = args.req_size;
603 req->msgh_remote_port = servport;
604 req->msgh_local_port = args.port;
605 req->msgh_id = oneway ? 0 : 1;
606 if (msg_type == msg_type_complex) {
607 (req)->msgh_bits |= MACH_MSGH_BITS_COMPLEX;
608 ((ipc_complex_message *)req)->body.msgh_descriptor_count = 1;
609 ((ipc_complex_message *)req)->descriptor.address = ints;
610 ((ipc_complex_message *)req)->descriptor.size =
611 num_ints * sizeof(u_int32_t);
612 ((ipc_complex_message *)req)->descriptor.deallocate = FALSE;
613 ((ipc_complex_message *)req)->descriptor.copy = MACH_MSG_VIRTUAL_COPY;
614 ((ipc_complex_message *)req)->descriptor.type = MACH_MSG_OOL_DESCRIPTOR;
615 }
616 if (verbose)
617 printf("client sending message %d\n", idx);
618 ret = mach_msg(req,
619 MACH_SEND_MSG,
620 args.req_size,
621 0,
622 MACH_PORT_NULL,
623 MACH_MSG_TIMEOUT_NONE,
624 MACH_PORT_NULL);
625 if (MACH_MSG_SUCCESS != ret) {
626 mach_error("mach_msg (send): ", ret);
627 fprintf(stderr, "bailing after %u iterations\n", idx);
628 exit(1);
629 break;
630 }
631 if (!oneway) {
632 if (verbose)
633 printf("client awaiting reply %d\n", idx);
634 reply->msgh_bits = 0;
635 reply->msgh_size = args.reply_size;
636 reply->msgh_local_port = args.port;
637 ret = mach_msg(args.reply_msg,
638 MACH_RCV_MSG|MACH_RCV_INTERRUPT,
639 0,
640 args.reply_size,
641 args.port,
642 MACH_MSG_TIMEOUT_NONE,
643 MACH_PORT_NULL);
644 if (MACH_MSG_SUCCESS != ret) {
645 mach_error("mach_msg (receive): ", ret);
646 fprintf(stderr, "bailing after %u iterations\n",
647 idx);
648 exit(1);
649 }
650 if (verbose)
651 printf("client received reply %d\n", idx);
652 }
653
654 client_work();
655 }
656
657 free(ints);
658 return NULL;
659 }
660
661 static void
662 thread_spawn(thread_id_t *thread, void *(fn)(void *), void *arg) {
663 if (threaded) {
664 kern_return_t ret;
665 ret = pthread_create(
666 &thread->tid,
667 NULL,
668 fn,
669 arg);
670 if (ret != 0)
671 err(1, "pthread_create()");
672 if (verbose)
673 printf("created pthread %p\n", thread->tid);
674 } else {
675 thread->pid = fork();
676 if (thread->pid == 0) {
677 if (verbose)
678 printf("calling %p(%p)\n", fn, arg);
679 fn(arg);
680 exit(0);
681 }
682 if (verbose)
683 printf("forked pid %d\n", thread->pid);
684 }
685 }
686
687 static void
688 thread_join(thread_id_t *thread) {
689 if (threaded) {
690 kern_return_t ret;
691 if (verbose)
692 printf("joining thread %p\n", thread->tid);
693 ret = pthread_join(thread->tid, NULL);
694 if (ret != KERN_SUCCESS)
695 err(1, "pthread_join(%p)", thread->tid);
696 } else {
697 int stat;
698 if (verbose)
699 printf("waiting for pid %d\n", thread->pid);
700 waitpid(thread->pid, &stat, 0);
701 }
702 }
703
704 static void
705 wait_for_servers(void)
706 {
707 int i;
708 int retry_count = 10;
709 mach_port_t bsport, servport;
710 kern_return_t ret;
711
712 /* find server port */
713 ret = task_get_bootstrap_port(mach_task_self(), &bsport);
714 if (KERN_SUCCESS != ret) {
715 mach_error("task_get_bootstrap_port(): ", ret);
716 exit(1);
717 }
718
719 while (retry_count-- > 0) {
720 for (i = 0; i < num_servers; i++) {
721 ret = bootstrap_look_up(bsport,
722 server_port_name[i],
723 &servport);
724 if (ret != KERN_SUCCESS) {
725 break;
726 }
727 }
728 if (ret == KERN_SUCCESS)
729 return;
730 usleep(100 * 1000); /* 100ms */
731 }
732 fprintf(stderr, "Server(s) failed to register\n");
733 exit(1);
734 }
735
736 int main(int argc, char *argv[])
737 {
738 int i;
739 int j;
740 thread_id_t *client_id;
741 thread_id_t *server_id;
742
743 signal(SIGINT, signal_handler);
744 parse_args(argc, argv);
745
746 calibrate_client_work();
747
748 /*
749 * If we're using affinity create an empty namespace now
750 * so this is shared by all our offspring.
751 */
752 if (affinity)
753 thread_setup(0);
754
755 server_id = (thread_id_t *) malloc(num_servers * sizeof(thread_id_t));
756 server_port_name = (char **) malloc(num_servers * sizeof(char *));
757 if (verbose)
758 printf("creating %d servers\n", num_servers);
759 for (i = 0; i < num_servers; i++) {
760 server_port_name[i] = (char *) malloc(sizeof("PORT.pppppp.xx"));
761 /* PORT names include pid of main process for disambiguation */
762 sprintf(server_port_name[i], "PORT.%06d.%02d", getpid(), i);
763 thread_spawn(&server_id[i], server, (void *) (long) i);
764 }
765
766 int totalclients = num_servers * num_clients;
767 int totalmsg = num_msgs * totalclients;
768 struct timeval starttv, endtv, deltatv;
769
770 /*
771 * Wait for all servers to have registered all ports before starting
772 * the clients and the clock.
773 */
774 wait_for_servers();
775
776 printf("%d server%s, %d client%s per server (%d total) %u messages...",
777 num_servers, (num_servers > 1)? "s" : "",
778 num_clients, (num_clients > 1)? "s" : "",
779 totalclients,
780 totalmsg);
781 fflush(stdout);
782
783 /* Call gettimeofday() once and throw away result; some implementations
784 * (like Mach's) cache some time zone info on first call.
785 */
786 gettimeofday(&starttv, NULL);
787 gettimeofday(&starttv, NULL);
788
789 client_id = (thread_id_t *) malloc(totalclients * sizeof(thread_id_t));
790 if (verbose)
791 printf("creating %d clients\n", totalclients);
792 for (i = 0; i < num_servers; i++) {
793 for (j = 0; j < num_clients; j++) {
794 thread_spawn(
795 &client_id[(i*num_clients) + j],
796 client,
797 (void *) (long) i);
798 }
799 }
800
801 /* Wait for servers to complete */
802 for (i = 0; i < num_servers; i++) {
803 thread_join(&server_id[i]);
804 }
805
806 gettimeofday(&endtv, NULL);
807
808 for (i = 0; i < totalclients; i++) {
809 thread_join(&client_id[i]);
810 }
811
812 /* report results */
813 deltatv.tv_sec = endtv.tv_sec - starttv.tv_sec;
814 deltatv.tv_usec = endtv.tv_usec - starttv.tv_usec;
815 if (endtv.tv_usec < starttv.tv_usec) {
816 deltatv.tv_sec--;
817 deltatv.tv_usec += 1000000;
818 }
819
820 double dsecs = (double) deltatv.tv_sec +
821 1.0E-6 * (double) deltatv.tv_usec;
822
823 printf(" in %ld.%03u seconds\n",
824 (long)deltatv.tv_sec, deltatv.tv_usec/1000);
825 printf(" throughput in messages/sec: %g\n",
826 (double)totalmsg / dsecs);
827 printf(" average message latency (usec): %2.3g\n",
828 dsecs * 1.0E6 / (double) totalmsg);
829
830 return (0);
831
832 }
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