9 #include <sys/syscall.h>
13 #define REARRANGE(__fun_name__, __format__, ...) __format__ "%s", __fun_name__, ##__VA_ARGS__
14 #define LOG(level, ...) \
16 if (level <= verbose) { \
17 fprintf(stderr, "%s: " REARRANGE( __func__ , ## __VA_ARGS__, "" )); \
22 unsigned int verbose = 0;
30 void (*func)(void *arg);
35 inline int canDefer(struct peerd *peer)
37 return !(peer->defer_portno == NoPort);
40 void print_req(struct xseg *xseg, struct xseg_request *req)
42 char target[64], data[64];
43 char *req_target, *req_data;
44 unsigned int end = (req->targetlen> 63) ? 63 : req->targetlen;
45 req_target = xseg_get_target(xseg, req);
46 req_data = xseg_get_data(xseg, req);
49 strncpy(target, req_target, end);
51 strncpy(data, req_data, 63);
53 printf("req id:%lu, op:%u %llu:%lu serviced: %lu, reqstate: %u\n"
54 "src: %u, st: %u, dst: %u dt: %u\n"
55 "target[%u]:'%s', data[%llu]:\n%s------------------\n\n",
57 (unsigned int)req->op,
58 (unsigned long long)req->offset,
59 (unsigned long)req->size,
60 (unsigned long)req->serviced,
61 (unsigned int)req->state,
62 (unsigned int)req->src_portno,
63 (unsigned int)req->src_transit_portno,
64 (unsigned int)req->dst_portno,
65 (unsigned int)req->dst_transit_portno,
66 (unsigned int)req->targetlen, target,
67 (unsigned long long)req->datalen, data);
70 void log_pr(char *msg, struct peer_req *pr)
72 char target[64], data[64];
73 char *req_target, *req_data;
74 struct peerd *peer = pr->peer;
75 struct xseg *xseg = pr->peer->xseg;
76 req_target = xseg_get_target(xseg, pr->req);
77 req_data = xseg_get_data(xseg, pr->req);
78 /* null terminate name in case of req->target is less than 63 characters,
79 * and next character after name (aka first byte of next buffer) is not
82 unsigned int end = (pr->req->targetlen> 63) ? 63 : pr->req->targetlen;
84 strncpy(target, req_target, end);
86 strncpy(data, req_data, 63);
88 printf("%s: req id:%u, op:%u %llu:%lu serviced: %lu, retval: %lu, reqstate: %u\n"
89 "target[%u]:'%s', data[%llu]:\n%s------------------\n\n",
91 (unsigned int)(pr - peer->peer_reqs),
92 (unsigned int)pr->req->op,
93 (unsigned long long)pr->req->offset,
94 (unsigned long)pr->req->size,
95 (unsigned long)pr->req->serviced,
96 (unsigned long)pr->retval,
97 (unsigned int)pr->req->state,
98 (unsigned int)pr->req->targetlen, target,
99 (unsigned long long)pr->req->datalen, data);
103 inline struct peer_req *alloc_peer_req(struct peerd *peer)
105 xqindex idx = xq_pop_head(&peer->free_reqs, 1);
108 return peer->peer_reqs + idx;
111 inline void free_peer_req(struct peerd *peer, struct peer_req *pr)
113 xqindex idx = pr - peer->peer_reqs;
115 xq_append_head(&peer->free_reqs, idx, 1);
118 inline static struct thread* alloc_thread(struct peerd *peer)
120 xqindex idx = xq_pop_head(&peer->threads, 1);
123 return peer->thread + idx;
126 inline static void free_thread(struct peerd *peer, struct thread *t)
128 xqindex idx = t - peer->thread;
129 xq_append_head(&peer->threads, idx, 1);
133 inline static void __wake_up_thread(struct thread *t)
135 pthread_mutex_lock(&t->lock);
136 pthread_cond_signal(&t->cond);
137 pthread_mutex_unlock(&t->lock);
140 inline static void wake_up_thread(struct thread* t)
147 inline static int wake_up_next_thread(struct peerd *peer)
149 //struct thread *t = alloc_thread(peer);
152 return (xseg_signal(peer->xseg, peer->portno_start));
155 struct timeval resp_start, resp_end, resp_accum = {0, 0};
156 uint64_t responds = 0;
157 void get_responds_stats(){
158 printf("Time waiting respond %lu.%06lu sec for %llu times.\n",
159 //(unsigned int)(t - peer->thread),
160 resp_accum.tv_sec, resp_accum.tv_usec, (long long unsigned int) responds);
164 void fail(struct peerd *peer, struct peer_req *pr)
166 struct xseg_request *req = pr->req;
168 XSEGLOG2(&lc, D, "failing req %u", (unsigned int) (pr - peer->peer_reqs));
169 req->state |= XS_FAILED;
170 //xseg_set_req_data(peer->xseg, pr->req, NULL);
171 p = xseg_respond(peer->xseg, req, pr->portno, X_ALLOC);
172 xseg_signal(peer->xseg, p);
173 free_peer_req(peer, pr);
174 wake_up_next_thread(peer);
178 void complete(struct peerd *peer, struct peer_req *pr)
180 struct xseg_request *req = pr->req;
182 req->state |= XS_SERVED;
183 //xseg_set_req_data(peer->xseg, pr->req, NULL);
184 //gettimeofday(&resp_start, NULL);
185 p = xseg_respond(peer->xseg, req, pr->portno, X_ALLOC);
186 //gettimeofday(&resp_end, NULL);
188 //timersub(&resp_end, &resp_start, &resp_end);
189 //timeradd(&resp_end, &resp_accum, &resp_accum);
190 //printf("xseg_signal: %u\n", p);
191 xseg_signal(peer->xseg, p);
192 free_peer_req(peer, pr);
193 wake_up_next_thread(peer);
196 void pending(struct peerd *peer, struct peer_req *pr)
198 pr->req->state = XS_PENDING;
201 static void handle_accepted(struct peerd *peer, struct peer_req *pr,
202 struct xseg_request *req)
204 struct xseg_request *xreq = pr->req;
205 //assert xreq == req;
206 XSEGLOG2(&lc, D, "Handle accepted");
208 //xreq->state = XS_ACCEPTED;
210 dispatch(peer, pr, req);
213 static void handle_received(struct peerd *peer, struct peer_req *pr,
214 struct xseg_request *req)
216 //struct xseg_request *req = pr->req;
217 //assert req->state != XS_ACCEPTED;
218 XSEGLOG2(&lc, D, "Handle received \n");
219 dispatch(peer, pr, req);
222 struct timeval sub_start, sub_end, sub_accum = {0, 0};
223 uint64_t submits = 0;
224 void get_submits_stats(){
225 printf("Time waiting submit %lu.%06lu sec for %llu times.\n",
226 //(unsigned int)(t - peer->thread),
227 sub_accum.tv_sec, sub_accum.tv_usec, (long long unsigned int) submits);
230 int submit_peer_req(struct peerd *peer, struct peer_req *pr)
233 struct xseg_request *req = pr->req;
234 // assert req->portno == peer->portno ?
235 //TODO small function with error checking
236 XSEGLOG2 (&lc, D, "submitting peer req %u\n", (unsigned int)(pr - peer->peer_reqs));
237 ret = xseg_set_req_data(peer->xseg, req, (void *)(pr));
240 //printf("pr: %x , req_data: %x \n", pr, xseg_get_req_data(peer->xseg, req));
241 //gettimeofday(&sub_start, NULL);
242 ret = xseg_submit(peer->xseg, req, pr->portno, X_ALLOC);
243 //gettimeofday(&sub_end, NULL);
245 //timersub(&sub_end, &sub_start, &sub_end);
246 //timeradd(&sub_end, &sub_accum, &sub_accum);
249 xseg_signal(peer->xseg, ret);
253 int thread_execute(struct peerd *peer, void (*func)(void *arg), void *arg)
255 struct thread *t = alloc_thread(peer);
262 // we could hijack a thread
266 static void* thread_loop(void *arg)
268 struct thread *t = (struct thread *) arg;
269 struct peerd *peer = t->peer;
270 struct xseg *xseg = peer->xseg;
271 xport portno_start = peer->portno_start;
272 xport portno_end = peer->portno_end;
274 uint64_t threshold=1;
275 pid_t pid =syscall(SYS_gettid);
277 struct xseg_request *accepted, *received;
282 XSEGLOG2(&lc, D, "thread %u\n", (unsigned int) (t- peer->thread));
284 XSEGLOG2(&lc, I, "Thread %u has tid %u.\n", (unsigned int) (t- peer->thread), pid);
285 xseg_init_local_signal(xseg, peer->portno_start);
288 XSEGLOG2(&lc, D, "Thread %u executes function\n", (unsigned int) (t- peer->thread));
289 xseg_cancel_wait(xseg, peer->portno_start);
296 for(loops= threshold; loops > 0; loops--) {
299 xseg_prepare_wait(xseg, peer->portno_start);
301 for (i = portno_start; i <= portno_end; i++) {
304 pr = alloc_peer_req(peer);
306 accepted = xseg_accept(xseg, i, X_NONBLOCK);
308 XSEGLOG2(&lc, D, "Thread %u accepted\n", (unsigned int) (t- peer->thread));
311 xseg_cancel_wait(xseg, i);
312 handle_accepted(peer, pr, accepted);
316 free_peer_req(peer, pr);
319 received = xseg_receive(xseg, i, X_NONBLOCK);
321 //printf("received req id: %u\n", received - xseg->requests);
322 //print_req(peer->xseg, received);
323 r = xseg_get_req_data(xseg, received, (void **) &pr);
325 //FIXME what to do here ?
326 XSEGLOG2(&lc, W, "Received request with no pr data\n");
327 xseg_respond(peer->xseg, received, peer->portno_start, X_ALLOC);
328 //FIXME if fails, put req
330 xseg_cancel_wait(xseg, i);
331 handle_received(peer, pr, received);
339 XSEGLOG2(&lc, I, "Thread %u goes to sleep\n", (unsigned int) (t- peer->thread));
340 xseg_wait_signal(xseg, 10000000UL);
341 xseg_cancel_wait(xseg, peer->portno_start);
342 XSEGLOG2(&lc, I, "Thread %u woke up\n", (unsigned int) (t- peer->thread));
347 void defer_request(struct peerd *peer, struct peer_req *pr)
349 // assert canDefer(peer);
350 // xseg_submit(peer->xseg, peer->defer_portno, pr->req);
351 // xseg_signal(peer->xseg, peer->defer_portno);
352 // free_peer_req(peer, pr);
355 static int peerd_loop(struct peerd *peer)
357 if (peer->interactive_func)
358 peer->interactive_func();
360 pthread_join(peer->thread[0].tid, NULL);
365 static struct xseg *join(char *spec)
367 struct xseg_config config;
370 (void)xseg_parse_spec(spec, &config);
371 xseg = xseg_join(config.type, config.name, "posix", NULL);
375 (void)xseg_create(&config);
376 return xseg_join(config.type, config.name, "posix", NULL);
379 int peerd_start_threads(struct peerd *peer)
382 uint32_t nr_threads = peer->nr_threads;
384 for (i = 0; i < nr_threads; i++) {
385 peer->thread[i].peer = peer;
386 pthread_cond_init(&peer->thread[i].cond,NULL);
387 pthread_mutex_init(&peer->thread[i].lock, NULL);
388 pthread_create(&peer->thread[i].tid, NULL, thread_loop, (void *)(peer->thread + i));
389 peer->thread[i].func = NULL;
390 peer->thread[i].arg = NULL;
396 static struct peerd* peerd_init(uint32_t nr_ops, char* spec, long portno_start,
397 long portno_end, uint32_t nr_threads, uint32_t defer_portno)
401 peer = malloc(sizeof(struct peerd));
406 peer->nr_ops = nr_ops;
407 peer->defer_portno = defer_portno;
408 peer->nr_threads = nr_threads;
410 peer->thread = calloc(nr_threads, sizeof(struct thread));
413 peer->peer_reqs = calloc(nr_ops, sizeof(struct peer_req));
414 if (!peer->peer_reqs){
420 if (!xq_alloc_seq(&peer->free_reqs, nr_ops, nr_ops))
422 if (!xq_alloc_empty(&peer->threads, nr_threads))
425 if (xseg_initialize()){
426 printf("cannot initialize library\n");
429 peer->xseg = join(spec);
433 peer->portno_start = (xport) portno_start;
434 peer->portno_end= (xport) portno_end;
435 peer->port = xseg_bind_port(peer->xseg, peer->portno_start, NULL);
437 printf("cannot bind to port %ld\n", peer->portno_start);
442 for (p = peer->portno_start + 1; p <= peer->portno_end; p++) {
443 struct xseg_port *tmp;
444 tmp = xseg_bind_port(peer->xseg, p, (void *)xseg_get_signal_desc(peer->xseg, peer->port));
446 printf("cannot bind to port %ld\n", p);
451 printf("Peer on ports %u-%u\n", peer->portno_start,
454 for (i = 0; i < nr_ops; i++) {
455 peer->peer_reqs[i].peer = peer;
456 peer->peer_reqs[i].req = NULL;
457 peer->peer_reqs[i].retval = 0;
458 peer->peer_reqs[i].priv = NULL;
460 peer->interactive_func = NULL;
465 int main(int argc, char *argv[])
467 struct peerd *peer = NULL;
471 long portno_start = -1, portno_end = -1;
473 uint32_t nr_ops = 16;
474 uint32_t nr_threads = 1 ;
475 unsigned int debug_level = 0;
476 uint32_t defer_portno = NoPort;
477 char *logfile = NULL;
479 //capture here -g spec, -n nr_ops, -p portno, -t nr_threads -v verbose level
480 // -dp xseg_portno to defer blocking requests
482 //TODO print messages on arg parsing error
484 for (i = 1; i < argc; i++) {
485 if (!strcmp(argv[i], "-g") && i + 1 < argc) {
491 if (!strcmp(argv[i], "-sp") && i + 1 < argc) {
492 portno_start = strtoul(argv[i+1], NULL, 10);
497 if (!strcmp(argv[i], "-ep") && i + 1 < argc) {
498 portno_end = strtoul(argv[i+1], NULL, 10);
503 if (!strcmp(argv[i], "-n") && i + 1 < argc) {
504 nr_ops = strtoul(argv[i+1], NULL, 10);
508 if (!strcmp(argv[i], "-v") && i + 1 < argc ) {
509 debug_level = atoi(argv[i+1]);
513 if (!strcmp(argv[i], "-dp") && i + 1 < argc ) {
514 defer_portno = strtoul(argv[i+1], NULL, 10);
518 if (!strcmp(argv[i], "-l") && i + 1 < argc ) {
525 init_logctx(&lc, argv[0], debug_level, logfile);
526 XSEGLOG2(&lc, D, "Main thread has tid %ld.\n", syscall(SYS_gettid));
528 //TODO perform argument sanity checks
529 verbose = debug_level;
532 peer = peerd_init(nr_ops, spec, portno_start, portno_end, nr_threads, defer_portno);
535 r = custom_peer_init(peer, argc, argv);
538 peerd_start_threads(peer);
539 return peerd_loop(peer);