code.grnet.gr Git - archipelago/blob - xseg/peers/user/mpeer.c

   1 #define _GNU_SOURCE
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <sys/types.h>
   5 #include <unistd.h>
   6 #include <xseg/xseg.h>
   7 #include <pthread.h>
   8 #include <mpeer.h>
   9 #include <sys/syscall.h>
  10 #include <sys/time.h>
  11 #include <signal.h>
  12
  13 #define REARRANGE(__fun_name__, __format__, ...) __format__ "%s", __fun_name__, ##__VA_ARGS__
  14 #define LOG(level, ...)                                              \
  15                 do {                                                               \
  16                         if (level <=  verbose) {                           \
  17                                 fprintf(stderr, "%s: "  REARRANGE( __func__ , ## __VA_ARGS__, "" )); \
  18                         }                                                          \
  19                 }while (0)
  20
  21
  22 unsigned int verbose = 0;
  23
  24 struct thread {
  25         struct peerd *peer;
  26         pthread_t tid;
  27         pthread_cond_t cond;
  28         pthread_mutex_t lock;
  29         void (*func)(void *arg);
  30         void *arg;
  31 };
  32
  33
  34 inline int canDefer(struct peerd *peer)
  35 {
  36         return !(peer->defer_portno == NoPort);
  37 }
  38
  39 void print_req(struct xseg *xseg, struct xseg_request *req)
  40 {
  41         char target[64], data[64];
  42         char *req_target, *req_data;
  43         unsigned int end = (req->targetlen> 63) ? 63 : req->targetlen;
  44         req_target = xseg_get_target(xseg, req);
  45         req_data = xseg_get_data(xseg, req);
  46
  47         if (1) {
  48                 strncpy(target, req_target, end);
  49                 target[end] = 0;
  50                 strncpy(data, req_data, 63);
  51                 data[63] = 0;
  52                 printf("req id:%lu, op:%u %llu:%lu serviced: %lu, reqstate: %u\n"
  53                                 "src: %u, st: %u, dst: %u dt: %u\n"
  54                                 "target[%u]:'%s', data[%llu]:\n%s------------------\n\n",
  55                                 (unsigned long)(req),
  56                                 (unsigned int)req->op,
  57                                 (unsigned long long)req->offset,
  58                                 (unsigned long)req->size,
  59                                 (unsigned long)req->serviced,
  60                                 (unsigned int)req->state,
  61                                 (unsigned int)req->src_portno,
  62                                 (unsigned int)req->src_transit_portno,
  63                                 (unsigned int)req->dst_portno,
  64                                 (unsigned int)req->dst_transit_portno,
  65                                 (unsigned int)req->targetlen, target,
  66                                 (unsigned long long)req->datalen, data);
  67         }
  68 }
  69 void log_pr(char *msg, struct peer_req *pr)
  70 {
  71         char target[64], data[64];
  72         char *req_target, *req_data;
  73         struct peerd *peer = pr->peer;
  74         struct xseg *xseg = pr->peer->xseg;
  75         req_target = xseg_get_target(xseg, pr->req);
  76         req_data = xseg_get_data(xseg, pr->req);
  77         /* null terminate name in case of req->target is less than 63 characters,
  78          *          * and next character after name (aka first byte of next buffer) is not
  79          *                   * null
  80          *                            */
  81         unsigned int end = (pr->req->targetlen> 63) ? 63 : pr->req->targetlen;
  82         if (verbose) {
  83                 strncpy(target, req_target, end);
  84                 target[end] = 0;
  85                 strncpy(data, req_data, 63);
  86                 data[63] = 0;
  87                 printf("%s: req id:%u, op:%u %llu:%lu serviced: %lu, retval: %lu, reqstate: %u\n"
  88                                 "target[%u]:'%s', data[%llu]:\n%s------------------\n\n",
  89                                 msg,
  90                                 (unsigned int)(pr - peer->peer_reqs),
  91                                 (unsigned int)pr->req->op,
  92                                 (unsigned long long)pr->req->offset,
  93                                 (unsigned long)pr->req->size,
  94                                 (unsigned long)pr->req->serviced,
  95                                 (unsigned long)pr->retval,
  96                                 (unsigned int)pr->req->state,
  97                                 (unsigned int)pr->req->targetlen, target,
  98                                 (unsigned long long)pr->req->datalen, data);
  99         }
 100 }
 101
 102 inline struct peer_req *alloc_peer_req(struct peerd *peer)
 103 {
 104         xqindex idx = xq_pop_head(&peer->free_reqs, 1);
 105         if (idx == Noneidx)
 106                 return NULL;
 107         return peer->peer_reqs + idx;
 108 }
 109
 110 inline void free_peer_req(struct peerd *peer, struct peer_req *pr)
 111 {
 112         xqindex idx = pr - peer->peer_reqs;
 113         pr->req = NULL;
 114         xq_append_head(&peer->free_reqs, idx, 1);
 115 }
 116
 117 inline static struct thread* alloc_thread(struct peerd *peer)
 118 {
 119         xqindex idx = xq_pop_head(&peer->threads, 1);
 120         if (idx == Noneidx)
 121                 return NULL;
 122         return peer->thread + idx;
 123 }
 124
 125 inline static void free_thread(struct peerd *peer, struct thread *t)
 126 {
 127         xqindex idx = t - peer->thread;
 128         xq_append_head(&peer->threads, idx, 1);
 129 }
 130
 131
 132 inline static void __wake_up_thread(struct thread *t)
 133 {
 134         pthread_mutex_lock(&t->lock);
 135         pthread_cond_signal(&t->cond);
 136         pthread_mutex_unlock(&t->lock);
 137 }
 138
 139 inline static void wake_up_thread(struct thread* t)
 140 {
 141         if (t){
 142                 __wake_up_thread(t);
 143         }
 144 }
 145
 146 inline static int wake_up_next_thread(struct peerd *peer)
 147 {
 148         //struct thread *t = alloc_thread(peer);
 149         //wake_up_thread(t);
 150         //return t;
 151         return (xseg_signal(peer->xseg, peer->portno));
 152 }
 153
 154 struct timeval resp_start, resp_end, resp_accum = {0, 0};
 155 uint64_t responds = 0;
 156 void get_responds_stats(){
 157                 printf("Time waiting respond %lu.%06lu sec for %llu times.\n",
 158                                 //(unsigned int)(t - peer->thread),
 159                                 resp_accum.tv_sec, resp_accum.tv_usec, responds);
 160 }
 161
 162 //FIXME error check
 163 void fail(struct peerd *peer, struct peer_req *pr)
 164 {
 165         struct xseg_request *req = pr->req;
 166         uint32_t p;
 167         LOG(5, "failing req %u\n", (unsigned int) (pr - peer->peer_reqs));
 168         req->state |= XS_FAILED;
 169         //xseg_set_req_data(peer->xseg, pr->req, NULL);
 170         p = xseg_respond(peer->xseg, req, peer->portno, X_ALLOC);
 171         xseg_signal(peer->xseg, p);
 172         free_peer_req(peer, pr);
 173         wake_up_next_thread(peer);
 174 }
 175
 176 //FIXME error check
 177 void complete(struct peerd *peer, struct peer_req *pr)
 178 {
 179         struct xseg_request *req = pr->req;
 180         uint32_t p;
 181         req->state |= XS_SERVED;
 182         //xseg_set_req_data(peer->xseg, pr->req, NULL);
 183         //gettimeofday(&resp_start, NULL);
 184         p = xseg_respond(peer->xseg, req, peer->portno, X_ALLOC);
 185         //gettimeofday(&resp_end, NULL);
 186         //responds++;
 187         //timersub(&resp_end, &resp_start, &resp_end);
 188         //timeradd(&resp_end, &resp_accum, &resp_accum);
 189         //printf("xseg_signal: %u\n", p);
 190         xseg_signal(peer->xseg, p);
 191         free_peer_req(peer, pr);
 192         wake_up_next_thread(peer);
 193 }
 194
 195 void pending(struct peerd *peer, struct peer_req *pr)
 196 {
 197                 pr->req->state = XS_PENDING;
 198 }
 199
 200 static void handle_accepted(struct peerd *peer, struct peer_req *pr,
 201                                 struct xseg_request *req)
 202 {
 203         struct xseg_request *xreq = pr->req;
 204         //assert xreq == req;
 205         LOG(4, "Handle accepted \n");
 206         xreq->serviced = 0;
 207         //xreq->state = XS_ACCEPTED;
 208         pr->retval = 0;
 209         dispatch(peer, pr, req);
 210 }
 211
 212 static void handle_received(struct peerd *peer, struct peer_req *pr,
 213                                 struct xseg_request *req)
 214 {
 215         //struct xseg_request *req = pr->req;
 216         //assert req->state != XS_ACCEPTED;
 217         LOG(4, "Handle received \n");
 218         dispatch(peer, pr, req);
 219
 220 }
 221 struct timeval sub_start, sub_end, sub_accum = {0, 0};
 222 uint64_t submits = 0;
 223 void get_submits_stats(){
 224                 printf("Time waiting submit %lu.%06lu sec for %llu times.\n",
 225                                 //(unsigned int)(t - peer->thread),
 226                                 sub_accum.tv_sec, sub_accum.tv_usec, submits);
 227 }
 228
 229 int submit_peer_req(struct peerd *peer, struct peer_req *pr)
 230 {
 231         uint32_t ret;
 232         struct xseg_request *req = pr->req;
 233         // assert req->portno == peer->portno ?
 234         //TODO small function with error checking
 235         LOG (5, "submitting peer req %u\n", (unsigned int)(pr - peer->peer_reqs));
 236         ret = xseg_set_req_data(peer->xseg, req, (void *)(pr));
 237         if (ret < 0)
 238                 return -1;
 239         //printf("pr: %x , req_data: %x \n", pr, xseg_get_req_data(peer->xseg, req));
 240         //gettimeofday(&sub_start, NULL);
 241         ret = xseg_submit(peer->xseg, req, peer->portno, X_ALLOC);
 242         //gettimeofday(&sub_end, NULL);
 243         //submits++;
 244         //timersub(&sub_end, &sub_start, &sub_end);
 245         //timeradd(&sub_end, &sub_accum, &sub_accum);
 246         if (ret == NoPort)
 247                 return -1;
 248         xseg_signal(peer->xseg, ret);
 249         return 0;
 250 }
 251
 252 int thread_execute(struct peerd *peer, void (*func)(void *arg), void *arg)
 253 {
 254         struct thread *t = alloc_thread(peer);
 255         if (t) {
 256                 t->func = func;
 257                 t->arg = arg;
 258                 wake_up_thread(t);
 259                 return 0;
 260         } else
 261                 // we could hijack a thread
 262                 return -1;
 263 }
 264
 265 static void* thread_loop(void *arg)
 266 {
 267         struct thread *t = (struct thread *) arg;
 268         struct peerd *peer = t->peer;
 269         struct xseg *xseg = peer->xseg;
 270         uint32_t portno = peer->portno;
 271         struct peer_req *pr;
 272         uint64_t threshold=1000;
 273         pid_t pid =syscall(SYS_gettid);
 274         uint64_t loops;
 275         struct xseg_request *accepted, *received;
 276         int r;
 277
 278         printf("thread %u\n",  (unsigned int) (t- peer->thread));
 279
 280         LOG(0, "Thread %u has tid %u.\n", (unsigned int) (t- peer->thread), pid);
 281         xseg_init_local_signal(xseg, portno);
 282         for (;;) {
 283                 if (t->func) {
 284                         LOG(5, "Thread %u executes function\n", (unsigned int) (t- peer->thread));
 285                         xseg_cancel_wait(xseg, portno);
 286                         t->func(t->arg);
 287                         t->func = NULL;
 288                         t->arg = NULL;
 289                         continue;
 290                 }
 291
 292                 for(loops= threshold; loops > 0; loops--) {
 293                         accepted = NULL;
 294                         received = NULL;
 295                         if (loops == 1)
 296                                 xseg_prepare_wait(xseg, portno);
 297
 298 //                      if (xq_count(&peer->xport->request_queue)){
 299                                 pr = alloc_peer_req(peer);
 300                                 if (pr) {
 301                                         accepted = xseg_accept(xseg, peer->portno);
 302                                         LOG(5, "Thread %u accepted\n", (unsigned int) (t- peer->thread));
 303                                         if (accepted) {
 304                                                 pr->req = accepted;
 305                                                 xseg_cancel_wait(xseg, portno);
 306                                                 wake_up_next_thread(peer);
 307                                                 handle_accepted(peer, pr, accepted);
 308                                                 loops = threshold;
 309                                         }
 310                                         else {
 311                                                 free_peer_req(peer, pr);
 312                                         }
 313                                 }
 314 //                      }
 315 //                      if (xq_count(&peer->xport->reply_queue)){
 316                                 received = xseg_receive(xseg, peer->portno);
 317                                 if (received) {
 318                                         //printf("received req id: %u\n", received - xseg->requests);
 319                                         //print_req(peer->xseg, received);
 320                                         r =  xseg_get_req_data(xseg, received, (void **) &pr);
 321                                         if (r < 0 || !pr){
 322                                                 //FIXME what to do here ?
 323                                                 LOG(0, "Received request with no pr data\n");
 324                                                 xseg_respond(peer->xseg, received, peer->portno, X_ALLOC);
 325                                         }
 326                                         //fail(peer, received);
 327                                         //assert pr->req == received;
 328                                         xseg_cancel_wait(xseg, portno);
 329                                         wake_up_next_thread(peer);
 330                                         handle_received(peer, pr, received);
 331                                         loops = threshold;
 332                                 }
 333 //                      }
 334                 }
 335                 LOG(1, "Thread %u goes to sleep\n", (unsigned int) (t- peer->thread));
 336                 xseg_wait_signal(xseg, 10000000UL);
 337                 xseg_cancel_wait(xseg, portno);
 338                 LOG(1, "Thread %u woke up\n", (unsigned int) (t- peer->thread));
 339         }
 340         return NULL;
 341 }
 342
 343 void defer_request(struct peerd *peer, struct peer_req *pr)
 344 {
 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);
 349 }
 350
 351 static int peerd_loop(struct peerd *peer)
 352 {
 353         if (peer->interactive_func)
 354                 peer->interactive_func();
 355         for (;;) {
 356                 pthread_join(peer->thread[0].tid, NULL);
 357         }
 358         return 0;
 359 }
 360
 361 static struct xseg *join(char *spec)
 362 {
 363         struct xseg_config config;
 364         struct xseg *xseg;
 365
 366         (void)xseg_parse_spec(spec, &config);
 367         xseg = xseg_join(config.type, config.name, "pthread", NULL);
 368         if (xseg)
 369                 return xseg;
 370
 371         (void)xseg_create(&config);
 372         return xseg_join(config.type, config.name, "pthread", NULL);
 373 }
 374
 375 int peerd_start_threads(struct peerd *peer)
 376 {
 377         int i;
 378         uint32_t nr_threads = peer->nr_threads;
 379         //TODO err check
 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;
 387
 388         }
 389         return 0;
 390 }
 391
 392 static struct peerd* peerd_init(uint32_t nr_ops, char* spec, long portno, uint32_t nr_threads, uint32_t defer_portno)
 393 {
 394         int i;
 395         struct peerd *peer;
 396         peer = malloc(sizeof(struct peerd));
 397         if (!peer) {
 398                 perror("malloc");
 399                 return NULL;
 400         }
 401         peer->nr_ops = nr_ops;
 402         peer->defer_portno = defer_portno;
 403         peer->nr_threads = nr_threads;
 404
 405         peer->thread = calloc(nr_threads, sizeof(struct thread));
 406         if (!peer->thread)
 407                 goto malloc_fail;
 408         peer->peer_reqs = calloc(nr_ops, sizeof(struct peer_req));
 409         if (!peer->peer_reqs){
 410 malloc_fail:
 411                 perror("malloc");
 412                 return NULL;
 413         }
 414
 415         if (!xq_alloc_seq(&peer->free_reqs, nr_ops, nr_ops))
 416                 goto malloc_fail;
 417         if (!xq_alloc_empty(&peer->threads, nr_threads))
 418                 goto malloc_fail;
 419
 420         if (xseg_initialize()){
 421                 printf("cannot initialize library\n");
 422                 return NULL;
 423         }
 424         peer->xseg = join(spec);
 425         if (!peer->xseg)
 426                 return NULL;
 427
 428         peer->xport = xseg_bind_port(peer->xseg, portno);
 429         if (!peer->xport){
 430                 printf("cannot bind to port %ld\n", portno);
 431                 return NULL;
 432         }
 433         printf("%lx\n", (unsigned long) peer->xport);
 434         peer->portno = xseg_portno(peer->xseg, peer->xport);
 435         printf("Peer on port %u/%u\n", peer->portno,
 436                         peer->xseg->config.nr_ports);
 437
 438         for (i = 0; i < nr_ops; i++) {
 439                 peer->peer_reqs[i].peer = peer;
 440                 peer->peer_reqs[i].req = NULL;
 441                 peer->peer_reqs[i].retval = 0;
 442                 peer->peer_reqs[i].priv = NULL;
 443         }
 444         peer->interactive_func = NULL;
 445         return peer;
 446 }
 447
 448
 449 int main(int argc, const char *argv[])
 450 {
 451         struct peerd *peer = NULL;
 452         //parse args
 453         char *spec = "";
 454         int i, r;
 455         long portno = -1;
 456         //set defaults here
 457         uint32_t nr_ops = 16;
 458         uint32_t nr_threads = 16 ;
 459         unsigned int debug_level = 0;
 460         uint32_t defer_portno = NoPort;
 461
 462         //capture here -g spec, -n nr_ops, -p portno, -t nr_threads -v verbose level
 463         // -dp xseg_portno to defer blocking requests
 464         //maybe -l log file ?
 465         //TODO print messages on arg parsing error
 466         LOG(5, "Main thread has tid %ld.\n", syscall(SYS_gettid));
 467
 468         for (i = 1; i < argc; i++) {
 469                 if (!strcmp(argv[i], "-g") && i + 1 < argc) {
 470                         spec = argv[i+1];
 471                         i += 1;
 472                         continue;
 473                 }
 474
 475                 if (!strcmp(argv[i], "-p") && i + 1 < argc) {
 476                         portno = strtoul(argv[i+1], NULL, 10);
 477                         i += 1;
 478                         continue;
 479                 }
 480
 481                 if (!strcmp(argv[i], "-n") && i + 1 < argc) {
 482                         nr_ops = strtoul(argv[i+1], NULL, 10);
 483                         i += 1;
 484                         continue;
 485                 }
 486                 if (!strcmp(argv[i], "-v") && i + 1 < argc ) {
 487                         debug_level = atoi(argv[i+1]);
 488                         i += 1;
 489                         continue;
 490                 }
 491                 if (!strcmp(argv[i], "-t") && i + 1 < argc ) {
 492                         nr_threads = strtoul(argv[i+1], NULL, 10);
 493                         i += 1;
 494                         continue;
 495                 }
 496                 if (!strcmp(argv[i], "-dp") && i + 1 < argc ) {
 497                         defer_portno = strtoul(argv[i+1], NULL, 10);
 498                         i += 1;
 499                         continue;
 500                 }
 501
 502         }
 503
 504         //TODO perform argument sanity checks
 505         verbose = debug_level;
 506
 507         //TODO err check
 508         peer = peerd_init(nr_ops, spec, portno, nr_threads, defer_portno);
 509         r = custom_peer_init(peer, argc, argv);
 510         if (r < 0)
 511                 return -1;
 512         peerd_start_threads(peer);
 513         return peerd_loop(peer);
 514 }