9 #include <sys/syscall.h>
13 unsigned int verbose = 0;
21 void (*func)(void *arg);
26 inline static struct thread* alloc_thread(struct peerd *peer)
28 xqindex idx = xq_pop_head(&peer->threads, 1);
31 return peer->thread + idx;
34 inline static void free_thread(struct peerd *peer, struct thread *t)
36 xqindex idx = t - peer->thread;
37 xq_append_head(&peer->threads, idx, 1);
41 inline static void __wake_up_thread(struct thread *t)
43 pthread_mutex_lock(&t->lock);
44 pthread_cond_signal(&t->cond);
45 pthread_mutex_unlock(&t->lock);
48 inline static void wake_up_thread(struct thread* t)
55 inline static int wake_up_next_thread(struct peerd *peer)
57 //struct thread *t = alloc_thread(peer);
60 return (xseg_signal(peer->xseg, peer->portno_start));
63 inline int canDefer(struct peerd *peer)
65 return !(peer->defer_portno == NoPort);
68 void print_req(struct xseg *xseg, struct xseg_request *req)
70 char target[64], data[64];
71 char *req_target, *req_data;
72 unsigned int end = (req->targetlen> 63) ? 63 : req->targetlen;
73 req_target = xseg_get_target(xseg, req);
74 req_data = xseg_get_data(xseg, req);
77 strncpy(target, req_target, end);
79 strncpy(data, req_data, 63);
81 printf("req id:%lu, op:%u %llu:%lu serviced: %lu, reqstate: %u\n"
82 "src: %u, st: %u, dst: %u dt: %u\n"
83 "target[%u]:'%s', data[%llu]:\n%s------------------\n\n",
85 (unsigned int)req->op,
86 (unsigned long long)req->offset,
87 (unsigned long)req->size,
88 (unsigned long)req->serviced,
89 (unsigned int)req->state,
90 (unsigned int)req->src_portno,
91 (unsigned int)req->src_transit_portno,
92 (unsigned int)req->dst_portno,
93 (unsigned int)req->dst_transit_portno,
94 (unsigned int)req->targetlen, target,
95 (unsigned long long)req->datalen, data);
98 void log_pr(char *msg, struct peer_req *pr)
100 char target[64], data[64];
101 char *req_target, *req_data;
102 struct peerd *peer = pr->peer;
103 struct xseg *xseg = pr->peer->xseg;
104 req_target = xseg_get_target(xseg, pr->req);
105 req_data = xseg_get_data(xseg, pr->req);
106 /* null terminate name in case of req->target is less than 63 characters,
107 * and next character after name (aka first byte of next buffer) is not
110 unsigned int end = (pr->req->targetlen> 63) ? 63 : pr->req->targetlen;
112 strncpy(target, req_target, end);
114 strncpy(data, req_data, 63);
116 printf("%s: req id:%u, op:%u %llu:%lu serviced: %lu, retval: %lu, reqstate: %u\n"
117 "target[%u]:'%s', data[%llu]:\n%s------------------\n\n",
119 (unsigned int)(pr - peer->peer_reqs),
120 (unsigned int)pr->req->op,
121 (unsigned long long)pr->req->offset,
122 (unsigned long)pr->req->size,
123 (unsigned long)pr->req->serviced,
124 (unsigned long)pr->retval,
125 (unsigned int)pr->req->state,
126 (unsigned int)pr->req->targetlen, target,
127 (unsigned long long)pr->req->datalen, data);
131 inline struct peer_req *alloc_peer_req(struct peerd *peer)
133 xqindex idx = xq_pop_head(&peer->free_reqs, 1);
136 return peer->peer_reqs + idx;
139 inline void free_peer_req(struct peerd *peer, struct peer_req *pr)
141 xqindex idx = pr - peer->peer_reqs;
143 xq_append_head(&peer->free_reqs, idx, 1);
146 struct timeval resp_start, resp_end, resp_accum = {0, 0};
147 uint64_t responds = 0;
148 void get_responds_stats(){
149 printf("Time waiting respond %lu.%06lu sec for %llu times.\n",
150 //(unsigned int)(t - peer->thread),
151 resp_accum.tv_sec, resp_accum.tv_usec, (long long unsigned int) responds);
155 void fail(struct peerd *peer, struct peer_req *pr)
157 struct xseg_request *req = pr->req;
159 XSEGLOG2(&lc, D, "failing req %u", (unsigned int) (pr - peer->peer_reqs));
160 req->state |= XS_FAILED;
161 //xseg_set_req_data(peer->xseg, pr->req, NULL);
162 p = xseg_respond(peer->xseg, req, pr->portno, X_ALLOC);
163 xseg_signal(peer->xseg, p);
164 free_peer_req(peer, pr);
165 wake_up_next_thread(peer);
169 void complete(struct peerd *peer, struct peer_req *pr)
171 struct xseg_request *req = pr->req;
173 req->state |= XS_SERVED;
174 //xseg_set_req_data(peer->xseg, pr->req, NULL);
175 //gettimeofday(&resp_start, NULL);
176 p = xseg_respond(peer->xseg, req, pr->portno, X_ALLOC);
177 //gettimeofday(&resp_end, NULL);
179 //timersub(&resp_end, &resp_start, &resp_end);
180 //timeradd(&resp_end, &resp_accum, &resp_accum);
181 //printf("xseg_signal: %u\n", p);
182 xseg_signal(peer->xseg, p);
183 free_peer_req(peer, pr);
184 wake_up_next_thread(peer);
187 static void handle_accepted(struct peerd *peer, struct peer_req *pr,
188 struct xseg_request *req)
190 struct xseg_request *xreq = pr->req;
191 //assert xreq == req;
192 XSEGLOG2(&lc, D, "Handle accepted");
194 //xreq->state = XS_ACCEPTED;
196 dispatch(peer, pr, req, dispatch_accept);
199 static void handle_received(struct peerd *peer, struct peer_req *pr,
200 struct xseg_request *req)
202 //struct xseg_request *req = pr->req;
203 //assert req->state != XS_ACCEPTED;
204 XSEGLOG2(&lc, D, "Handle received \n");
205 dispatch(peer, pr, req, dispatch_receive);
208 struct timeval sub_start, sub_end, sub_accum = {0, 0};
209 uint64_t submits = 0;
210 void get_submits_stats(){
211 printf("Time waiting submit %lu.%06lu sec for %llu times.\n",
212 //(unsigned int)(t - peer->thread),
213 sub_accum.tv_sec, sub_accum.tv_usec, (long long unsigned int) submits);
216 int submit_peer_req(struct peerd *peer, struct peer_req *pr)
219 struct xseg_request *req = pr->req;
220 // assert req->portno == peer->portno ?
221 //TODO small function with error checking
222 XSEGLOG2 (&lc, D, "submitting peer req %u\n", (unsigned int)(pr - peer->peer_reqs));
223 ret = xseg_set_req_data(peer->xseg, req, (void *)(pr));
226 //printf("pr: %x , req_data: %x \n", pr, xseg_get_req_data(peer->xseg, req));
227 //gettimeofday(&sub_start, NULL);
228 ret = xseg_submit(peer->xseg, req, pr->portno, X_ALLOC);
229 //gettimeofday(&sub_end, NULL);
231 //timersub(&sub_end, &sub_start, &sub_end);
232 //timeradd(&sub_end, &sub_accum, &sub_accum);
235 xseg_signal(peer->xseg, ret);
239 int thread_execute(struct peerd *peer, void (*func)(void *arg), void *arg)
241 struct thread *t = alloc_thread(peer);
248 // we could hijack a thread
252 static int check_ports(struct peerd *peer)
254 struct xseg *xseg = peer->xseg;
255 xport portno_start = peer->portno_start;
256 xport portno_end = peer->portno_end;
257 struct xseg_request *accepted, *received;
262 for (i = portno_start; i <= portno_end; i++) {
265 pr = alloc_peer_req(peer);
267 accepted = xseg_accept(xseg, i, X_NONBLOCK);
271 xseg_cancel_wait(xseg, i);
272 handle_accepted(peer, pr, accepted);
276 free_peer_req(peer, pr);
279 received = xseg_receive(xseg, i, X_NONBLOCK);
281 r = xseg_get_req_data(xseg, received, (void **) &pr);
283 XSEGLOG2(&lc, W, "Received request with no pr data\n");
284 xport p = xseg_respond(peer->xseg, received, peer->portno_start, X_ALLOC);
286 XSEGLOG2(&lc, W, "Could not respond stale request");
287 xseg_put_request(xseg, received, portno_start);
290 xseg_signal(xseg, p);
293 //maybe perform sanity check for pr
294 xseg_cancel_wait(xseg, i);
295 handle_received(peer, pr, received);
304 static void* thread_loop(void *arg)
306 struct thread *t = (struct thread *) arg;
307 struct peerd *peer = t->peer;
308 struct xseg *xseg = peer->xseg;
309 xport portno_start = peer->portno_start;
310 xport portno_end = peer->portno_end;
311 pid_t pid =syscall(SYS_gettid);
313 uint64_t threshold=1000/(1 + portno_end - portno_start);
315 XSEGLOG2(&lc, D, "thread %u\n", (unsigned int) (t- peer->thread));
317 XSEGLOG2(&lc, I, "Thread %u has tid %u.\n", (unsigned int) (t- peer->thread), pid);
318 xseg_init_local_signal(xseg, peer->portno_start);
321 XSEGLOG2(&lc, D, "Thread %u executes function\n", (unsigned int) (t- peer->thread));
322 xseg_cancel_wait(xseg, peer->portno_start);
329 for(loops= threshold; loops > 0; loops--) {
331 xseg_prepare_wait(xseg, peer->portno_start);
332 if (check_ports(peer))
335 XSEGLOG2(&lc, I, "Thread %u goes to sleep\n", (unsigned int) (t- peer->thread));
336 xseg_wait_signal(xseg, 10000000UL);
337 xseg_cancel_wait(xseg, peer->portno_start);
338 XSEGLOG2(&lc, I, "Thread %u woke up\n", (unsigned int) (t- peer->thread));
343 void defer_request(struct peerd *peer, struct peer_req *pr)
345 // assert canDefer(peer);
346 // xseg_submit(peer->xseg, peer->defer_portno, pr->req);
347 // xseg_signal(peer->xseg, peer->defer_portno);
348 // free_peer_req(peer, pr);
351 static int peerd_loop(struct peerd *peer)
353 if (peer->interactive_func)
354 peer->interactive_func();
356 pthread_join(peer->thread[0].tid, NULL);
361 static struct xseg *join(char *spec)
363 struct xseg_config config;
366 (void)xseg_parse_spec(spec, &config);
367 xseg = xseg_join(config.type, config.name, "pthread", NULL);
371 (void)xseg_create(&config);
372 return xseg_join(config.type, config.name, "pthread", NULL);
375 int peerd_start_threads(struct peerd *peer)
378 uint32_t nr_threads = peer->nr_threads;
380 for (i = 0; i < nr_threads; i++) {
381 peer->thread[i].peer = peer;
382 pthread_cond_init(&peer->thread[i].cond,NULL);
383 pthread_mutex_init(&peer->thread[i].lock, NULL);
384 pthread_create(&peer->thread[i].tid, NULL, thread_loop, (void *)(peer->thread + i));
385 peer->thread[i].func = NULL;
386 peer->thread[i].arg = NULL;
392 static struct peerd* peerd_init(uint32_t nr_ops, char* spec, long portno_start,
393 long portno_end, uint32_t nr_threads, uint32_t defer_portno)
397 struct xseg_port *port;
398 peer = malloc(sizeof(struct peerd));
403 peer->nr_ops = nr_ops;
404 peer->defer_portno = defer_portno;
405 peer->nr_threads = nr_threads;
407 peer->thread = calloc(nr_threads, sizeof(struct thread));
410 peer->peer_reqs = calloc(nr_ops, sizeof(struct peer_req));
411 if (!peer->peer_reqs){
417 if (!xq_alloc_seq(&peer->free_reqs, nr_ops, nr_ops))
419 if (!xq_alloc_empty(&peer->threads, nr_threads))
422 if (xseg_initialize()){
423 printf("cannot initialize library\n");
426 peer->xseg = join(spec);
430 peer->portno_start = (xport) portno_start;
431 peer->portno_end= (xport) portno_end;
432 port = xseg_bind_port(peer->xseg, peer->portno_start, NULL);
434 printf("cannot bind to port %ld\n", peer->portno_start);
439 for (p = peer->portno_start + 1; p <= peer->portno_end; p++) {
440 struct xseg_port *tmp;
441 tmp = xseg_bind_port(peer->xseg, p, (void *)xseg_get_signal_desc(peer->xseg, port));
443 printf("cannot bind to port %ld\n", p);
448 printf("Peer on ports %u-%u\n", peer->portno_start,
451 for (i = 0; i < nr_ops; i++) {
452 peer->peer_reqs[i].peer = peer;
453 peer->peer_reqs[i].req = NULL;
454 peer->peer_reqs[i].retval = 0;
455 peer->peer_reqs[i].priv = NULL;
456 peer->peer_reqs[i].portno = NoPort;
458 peer->interactive_func = NULL;
463 int main(int argc, char *argv[])
465 struct peerd *peer = NULL;
469 long portno_start = -1, portno_end = -1, portno = -1;
471 uint32_t nr_ops = 16;
472 uint32_t nr_threads = 16 ;
473 unsigned int debug_level = 0;
474 uint32_t defer_portno = NoPort;
475 char *logfile = NULL;
477 //capture here -g spec, -n nr_ops, -p portno, -t nr_threads -v verbose level
478 // -dp xseg_portno to defer blocking requests
480 //TODO print messages on arg parsing error
482 for (i = 1; i < argc; i++) {
483 if (!strcmp(argv[i], "-g") && i + 1 < argc) {
489 if (!strcmp(argv[i], "-sp") && i + 1 < argc) {
490 portno_start = strtoul(argv[i+1], NULL, 10);
495 if (!strcmp(argv[i], "-ep") && i + 1 < argc) {
496 portno_end = strtoul(argv[i+1], NULL, 10);
501 if (!strcmp(argv[i], "-p") && i + 1 < argc) {
502 portno = strtoul(argv[i+1], NULL, 10);
507 if (!strcmp(argv[i], "-n") && i + 1 < argc) {
508 nr_ops = strtoul(argv[i+1], NULL, 10);
512 if (!strcmp(argv[i], "-v") && i + 1 < argc ) {
513 debug_level = atoi(argv[i+1]);
517 if (!strcmp(argv[i], "-t") && i + 1 < argc ) {
518 nr_threads = strtoul(argv[i+1], NULL, 10);
522 if (!strcmp(argv[i], "-dp") && i + 1 < argc ) {
523 defer_portno = strtoul(argv[i+1], NULL, 10);
527 if (!strcmp(argv[i], "-l") && i + 1 < argc ) {
534 init_logctx(&lc, argv[0], debug_level, logfile);
535 XSEGLOG2(&lc, D, "Main thread has tid %ld.\n", syscall(SYS_gettid));
537 //TODO perform argument sanity checks
538 verbose = debug_level;
540 portno_start = portno;
545 peer = peerd_init(nr_ops, spec, portno_start, portno_end, nr_threads, defer_portno);
548 r = custom_peer_init(peer, argc, argv);
551 peerd_start_threads(peer);
552 return peerd_loop(peer);