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39 #include <sys/syscall.h>
40 #include <sys/types.h>
42 #include <xseg/xseg.h>
47 #include <bench-xseg.h>
50 char global_id[IDLEN];
54 * This function checks two things:
55 * a) If in-flight requests are less than given iodepth
56 * b) If we have submitted al of the requests
58 #define CAN_SEND_REQUEST(prefs) \
59 prefs->sub_tm->completed - prefs->rec_tm->completed < prefs->iodepth && \
60 prefs->sub_tm->completed < prefs->max_requests \
62 void custom_peer_usage()
64 fprintf(stderr, "Custom peer options: \n"
65 " --------------------------------------------\n"
66 " -op | None | XSEG operation [read|write|info|delete]\n"
67 " --pattern | None | I/O pattern [seq|rand]\n"
68 " -to | None | Total objects (not for read/write)\n"
69 " -ts | None | Total I/O size\n"
70 " -os | 4M | Object size\n"
71 " -bs | 4k | Block size\n"
72 " -dp | None | Destination port\n"
73 " --iodepth | 1 | Number of in-flight I/O requests\n"
74 " --verify | no | Verify written requests [no|meta|hash]\n"
75 " --seed | None | Inititalize LFSR and target names\n"
76 " --insanity| sane | Adjust insanity level of benchmark:\n"
77 " | | [sane|eccentric|manic|paranoid]\n"
81 int custom_peer_init(struct peerd *peer, int argc, char *argv[])
84 char total_objects[MAX_ARG_LEN + 1];
85 char total_size[MAX_ARG_LEN + 1];
86 char object_size[MAX_ARG_LEN + 1];
87 char block_size[MAX_ARG_LEN + 1];
88 char op[MAX_ARG_LEN + 1];
89 char pattern[MAX_ARG_LEN + 1];
90 char insanity[MAX_ARG_LEN + 1];
91 struct xseg *xseg = peer->xseg;
92 unsigned int xseg_page_size = 1 << xseg->config.page_shift;
106 for (i = 0; i < nr_threads; i++) {
107 prefs = peer->thread[i]->priv;
108 prefs = malloc(sizeof(struct bench));
115 prefs = malloc(sizeof(struct bench));
122 //Begin reading the benchmark-specific arguments
123 BEGIN_READ_ARGS(argc, argv);
124 READ_ARG_STRING("-op", op, MAX_ARG_LEN);
125 READ_ARG_STRING("--pattern", pattern, MAX_ARG_LEN);
126 READ_ARG_STRING("-to", total_objects, MAX_ARG_LEN);
127 READ_ARG_STRING("-ts", total_size, MAX_ARG_LEN);
128 READ_ARG_STRING("-os", object_size, MAX_ARG_LEN);
129 READ_ARG_STRING("-bs", block_size, MAX_ARG_LEN);
130 READ_ARG_ULONG("--iodepth", iodepth);
131 READ_ARG_ULONG("-dp", dst_port);
132 READ_ARG_STRING("--insanity", insanity, MAX_ARG_LEN);
135 /*****************************\
136 * Check I/O type parameters *
137 \*****************************/
139 //We support 4 xseg operations: X_READ, X_WRITE, X_DELETE, X_INFO
140 //The I/O pattern of thesee operations can be either synchronous (sync) or
143 XSEGLOG2(&lc, E, "xseg operation needs to be supplied\n");
148 XSEGLOG2(&lc, E, "Invalid syntax: -op %s\n", op);
154 XSEGLOG2(&lc, E, "I/O pattern needs to be supplied\n");
157 r = read_pattern(pattern);
159 XSEGLOG2(&lc, E, "Invalid syntax: --pattern %s\n", pattern);
162 prefs->flags |= (uint8_t)r;
164 //Defailt iodepth value is 1
168 prefs->iodepth = iodepth;
170 /**************************\
171 * Check timer parameters *
172 \**************************/
174 //Most of the times, not all timers need to be used.
175 //We can choose which timers will be used by adjusting the "insanity"
176 //level of the benchmark i.e. the obscurity of code paths (get request,
177 //submit request) that will be timed.
179 strcpy(insanity, "sane");
181 prefs->insanity = read_insanity(insanity);
182 if (prefs->insanity < 0) {
183 XSEGLOG2(&lc, E, "Invalid syntax: --insanity %s\n", insanity);
188 * If we have a request other than read/write, we don't need to check
189 * about size parameters, but only how many objects we want to affect
191 if (prefs->op != X_READ && prefs->op != X_WRITE) {
193 /***************************\
194 * Check object parameters *
195 \***************************/
197 if (!total_objects[0]) {
199 "Total number of objects needs to be supplied\n");
202 prefs->to = str2num(total_objects);
204 XSEGLOG2(&lc, E, "Invalid syntax: -to %s\n", total_objects);
208 //In this case, the maximum number of requests is the total number of
209 //objects we will handle
210 prefs->max_requests = prefs->to;
213 /*************************\
214 * Check size parameters *
215 \*************************/
217 //Block size (bs): Defaults to 4K.
218 //It must be a number followed by one of these characters:
220 //If not, it will be considered as size in bytes.
221 //Must be integer multiple of segment's page size (typically 4k).
223 strcpy(block_size,"4k");
225 prefs->bs = str2num(block_size);
227 XSEGLOG2(&lc, E, "Invalid syntax: -bs %s\n", block_size);
229 } else if (prefs->bs % xseg_page_size) {
230 XSEGLOG2(&lc, E, "Misaligned block size: %s\n", block_size);
234 //Total I/O size (ts): Must be supplied by user.
235 //Must have the same format as "total size"
236 //Must be integer multiple of "block size"
237 if (!total_size[0]) {
238 XSEGLOG2(&lc, E, "Total I/O size needs to be supplied\n");
242 prefs->ts = str2num(total_size);
244 XSEGLOG2(&lc, E, "Invalid syntax: -ts %s\n", total_size);
246 } else if (prefs->ts % prefs->bs) {
247 XSEGLOG2(&lc, E, "Misaligned total I/O size: %s\n", total_size);
249 } else if (prefs->ts > xseg->segment_size) {
251 "Total I/O size exceeds segment size\n", total_size);
255 //Object size (os): Defaults to 4M.
256 //Must have the same format as "total size"
257 //Must be integer multiple of "block size"
259 strcpy(object_size,"4M");
261 prefs->os = str2num(object_size);
263 XSEGLOG2(&lc, E, "Invalid syntax: -os %s\n", object_size);
265 } else if (prefs->os % prefs->bs) {
266 XSEGLOG2(&lc, E, "Misaligned object size: %s\n", object_size);
270 //In this case, the maximum number of requests is the number of blocks
271 //we need to cover the total I/O size
272 prefs->max_requests = prefs->ts / prefs->bs;
275 /*************************\
276 * Check port parameters *
277 \*************************/
280 XSEGLOG2(&lc, E, "Destination port needs to be supplied\n");
284 prefs->src_port = peer->portno_start; //TODO: allow user to change this
285 prefs->dst_port = (xport) dst_port;
287 /*********************************\
288 * Create timers for all metrics *
289 \*********************************/
291 if (init_timer(&prefs->total_tm, TM_SANE))
293 if (init_timer(&prefs->sub_tm, TM_MANIC))
295 if (init_timer(&prefs->get_tm, TM_PARANOID))
297 if (init_timer(&prefs->rec_tm, TM_ECCENTRIC))
300 /********************************\
301 * Customize struct peerd/prefs *
302 \********************************/
306 //The following function initializes the global_id, global_seed extern
310 if ((prefs->flags & (1 <<PATTERN_FLAG)) == IO_RAND) {
311 prefs->lfsr = malloc(sizeof(struct lfsr));
316 //FIXME: Give a name to max requests, not just prefs->ts / prefs->bs
317 //FIXME: handle better the seed passing than just giving UINT64_MAX
318 if (lfsr_init(prefs->lfsr, prefs->max_requests, UINT64_MAX)) {
319 XSEGLOG2(&lc, E, "LFSR could not be initialized\n");
324 peer->peerd_loop = custom_peerd_loop;
325 peer->priv = (void *) prefs;
333 free(prefs->total_tm);
342 static int send_request(struct peerd *peer, struct bench *prefs)
344 struct xseg_request *req;
345 struct xseg *xseg = peer->xseg;
347 xport srcport = prefs->src_port;
348 xport dstport = prefs->dst_port;
353 uint64_t size = prefs->bs;
355 //srcport and dstport must already be provided by the user.
356 //returns struct xseg_request with basic initializations
357 //XSEGLOG2(&lc, D, "Get new request\n");
358 timer_start(prefs, prefs->get_tm);
359 req = xseg_get_request(xseg, srcport, dstport, X_ALLOC);
361 XSEGLOG2(&lc, W, "Cannot get request\n");
364 timer_stop(prefs, prefs->get_tm, NULL);
366 //Allocate enough space for the data and the target's name
367 //XSEGLOG2(&lc, D, "Prepare new request\n");
368 r = xseg_prep_request(xseg, req, TARGETLEN, size);
370 XSEGLOG2(&lc, W, "Cannot prepare request! (%lu, %llu)\n",
371 TARGETLEN, (unsigned long long)size);
372 goto put_xseg_request;
375 //Determine what the next target/chunk will be, based on I/O pattern
376 new = determine_next(prefs);
377 XSEGLOG2(&lc, I, "Our new request is %lu\n", new);
378 //Create a target of this format: "bench-<obj_no>"
379 create_target(prefs, req, new);
381 if (prefs->op == X_WRITE || prefs->op == X_READ) {
383 //Calculate the chunk offset inside the object
384 req->offset = (new * prefs->bs) % prefs->os;
385 XSEGLOG2(&lc, D, "Offset of request %lu is %lu\n", new, req->offset);
387 if (prefs->op == X_WRITE)
388 create_chunk(prefs, req, new);
394 //XSEGLOG2(&lc, D, "Allocate peer request\n");
395 pr = alloc_peer_req(peer);
397 XSEGLOG2(&lc, W, "Cannot allocate peer request (%ld remaining)\n",
398 peer->nr_ops - xq_count(&peer->free_reqs));
399 goto put_xseg_request;
402 pr->portno = srcport;
404 pr->priv = malloc(sizeof(struct timespec));
407 goto put_peer_request;
410 //XSEGLOG2(&lc, D, "Set request data\n");
411 r = xseg_set_req_data(xseg, req, pr);
413 XSEGLOG2(&lc, W, "Cannot set request data\n");
414 goto put_peer_request;
418 * Start measuring receive time.
419 * When we receive a request, we need to have its submission time to
420 * measure elapsed time. Thus, we memcpy its submission time to pr->priv.
421 * QUESTION: Is this the fastest way?
423 timer_start(prefs, prefs->rec_tm);
424 if (prefs->rec_tm->insanity <= prefs->insanity)
425 memcpy(pr->priv, &prefs->rec_tm->start_time, sizeof(struct timespec));
427 //Submit the request from the source port to the target port
428 //XSEGLOG2(&lc, D, "Submit request %lu\n", new);
429 timer_start(prefs, prefs->sub_tm);
430 p = xseg_submit(xseg, req, srcport, X_ALLOC);
432 XSEGLOG2(&lc, W, "Cannot submit request\n");
433 goto put_peer_request;
435 timer_stop(prefs, prefs->sub_tm, NULL);
437 //Send SIGIO to the process that has bound this port to inform that
439 r = xseg_signal(xseg, p);
441 XSEGLOG2(&lc, W, "Cannot signal destination peer (reason %d)\n", r);
447 free_peer_req(peer, pr);
449 if (xseg_put_request(xseg, req, srcport))
450 XSEGLOG2(&lc, W, "Cannot put request\n");
455 * This function substitutes the default generic_peerd_loop of peer.c.
456 * It's plugged to struct peerd at custom peer's initialisation
458 int custom_peerd_loop(void *arg)
461 struct thread *t = (struct thread *) arg;
462 struct peerd *peer = t->peer;
465 struct peerd *peer = (struct peerd *) arg;
466 char id[4] = {'P','e','e','r'};
468 struct xseg *xseg = peer->xseg;
469 struct bench *prefs = peer->priv;
470 xport portno_start = peer->portno_start;
471 xport portno_end = peer->portno_end;
472 uint64_t threshold=1000/(1 + portno_end - portno_start);
473 pid_t pid = syscall(SYS_gettid);
477 XSEGLOG2(&lc, I, "%s has tid %u.\n",id, pid);
478 xseg_init_local_signal(xseg, peer->portno_start);
480 timer_start(prefs, prefs->total_tm);
482 while (!isTerminate()) {
485 XSEGLOG2(&lc, D, "%s executes function\n", id);
486 xseg_cancel_wait(xseg, peer->portno_start);
493 while (CAN_SEND_REQUEST(prefs)) {
494 xseg_cancel_wait(xseg, peer->portno_start);
495 XSEGLOG2(&lc, D, "...because %lu < %lu && %lu < %lu\n",
496 prefs->sub_tm->completed - prefs->rec_tm->completed,
497 prefs->iodepth, prefs->sub_tm->completed,
498 prefs->max_requests);
499 XSEGLOG2(&lc, D, "Start sending new request\n");
500 r = send_request(peer, prefs);
504 //Heart of peerd_loop. This loop is common for everyone.
505 for (loops = threshold; loops > 0; loops--) {
507 xseg_prepare_wait(xseg, peer->portno_start);
509 if (check_ports(peer)) {
510 //If an old request has just been acked, the most sensible
511 //thing to do is to immediately send a new one
512 if (prefs->rec_tm->completed < prefs->max_requests)
518 //struct xseg_port *port = xseg_get_port(xseg, portno_start);
520 //q = XPTR_TAKE(port->request_queue, xseg->segment);
521 //XSEGLOG2(&lc, I, "%s goes to sleep with %u requests pending\n",
523 XSEGLOG2(&lc, I, "%s goes to sleep\n", id);
530 xseg_wait_signal(xseg, 10000000UL);
531 xseg_cancel_wait(xseg, peer->portno_start);
532 XSEGLOG2(&lc, I, "%s woke up\n", id);
535 XSEGLOG2(&lc, I, "peer->free_reqs = %d, peer->nr_ops = %d\n",
536 xq_count(&peer->free_reqs), peer->nr_ops);
540 void custom_peer_finalize(struct peerd *peer)
542 struct bench *prefs = peer->priv;
543 //TODO: Measure mean time, standard variation
545 if (!prefs->total_tm->completed)
546 timer_stop(prefs, prefs->total_tm, NULL);
549 print_res(prefs, prefs->total_tm, "Total Requests");
554 static void handle_received(struct peerd *peer, struct peer_req *pr)
556 //FIXME: handle null pointer
557 struct bench *prefs = peer->priv;
558 struct timer *rec = prefs->rec_tm;
561 //This is a serious error, so we must stop
562 XSEGLOG2(&lc, E, "Received peer request with no xseg request");
568 XSEGLOG2(&lc, W, "Cannot find submission time of request");
572 timer_stop(prefs, rec, pr->priv);
574 if (xseg_put_request(peer->xseg, pr->req, pr->portno))
575 XSEGLOG2(&lc, W, "Cannot put xseg request\n");
577 //QUESTION, can't we just keep the malloced memory for future use?
579 free_peer_req(peer, pr);
582 int dispatch(struct peerd *peer, struct peer_req *pr, struct xseg_request *req,
583 enum dispatch_reason reason)
586 case dispatch_accept:
587 //This is wrong, benchmarking peer should not accept requests,
589 XSEGLOG2(&lc, W, "Bench peer should not accept requests\n");
592 case dispatch_receive:
593 handle_received(peer, pr);