1 /* Copyright (c) 2007-2013. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "xbt/replay.h"
12 #include "simix/smx_private.h"
13 #include "surf/surf.h"
14 #include "simgrid/sg_config.h"
15 #include "colls/colls.h"
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi, "Logging specific to SMPI (base)");
20 static int match_recv(void* a, void* b, smx_action_t ignored) {
21 MPI_Request ref = (MPI_Request)a;
22 MPI_Request req = (MPI_Request)b;
23 XBT_DEBUG("Trying to match a recv of src %d against %d, tag %d against %d",ref->src,req->src, ref->tag, req->tag);
25 xbt_assert(ref, "Cannot match recv against null reference");
26 xbt_assert(req, "Cannot match recv against null request");
27 if((ref->src == MPI_ANY_SOURCE || req->src == ref->src)
28 && ((ref->tag == MPI_ANY_TAG && req->tag >=0) || req->tag == ref->tag)){
29 //we match, we can transfer some values
30 // FIXME : move this to the copy function ?
31 if(ref->src == MPI_ANY_SOURCE)ref->real_src = req->src;
32 if(ref->tag == MPI_ANY_TAG)ref->real_tag = req->tag;
33 if(ref->real_size < req->real_size) ref->truncated = 1;
35 ref->detached_sender=req; //tie the sender to the receiver, as it is detached and has to be freed in the receiver
37 XBT_DEBUG("match succeeded");
42 static int match_send(void* a, void* b,smx_action_t ignored) {
43 MPI_Request ref = (MPI_Request)a;
44 MPI_Request req = (MPI_Request)b;
45 XBT_DEBUG("Trying to match a send of src %d against %d, tag %d against %d",ref->src,req->src, ref->tag, req->tag);
46 xbt_assert(ref, "Cannot match send against null reference");
47 xbt_assert(req, "Cannot match send against null request");
49 if((req->src == MPI_ANY_SOURCE || req->src == ref->src)
50 && ((req->tag == MPI_ANY_TAG && ref->tag >=0)|| req->tag == ref->tag))
52 if(req->src == MPI_ANY_SOURCE)req->real_src = ref->src;
53 if(req->tag == MPI_ANY_TAG)req->real_tag = ref->tag;
54 if(req->real_size < ref->real_size) req->truncated = 1;
56 req->detached_sender=ref; //tie the sender to the receiver, as it is detached and has to be freed in the receiver
58 XBT_DEBUG("match succeeded");
64 typedef struct s_smpi_factor *smpi_factor_t;
65 typedef struct s_smpi_factor {
68 double values[4];//arbitrary set to 4
70 xbt_dynar_t smpi_os_values = NULL;
71 xbt_dynar_t smpi_or_values = NULL;
72 xbt_dynar_t smpi_ois_values = NULL;
74 // Methods used to parse and store the values for timing injections in smpi
75 // These are taken from surf/network.c and generalized to have more factors
76 // These methods should be merged with those in surf/network.c (moved somewhere in xbt ?)
78 static int factor_cmp(const void *pa, const void *pb)
80 return (((s_smpi_factor_t*)pa)->factor > ((s_smpi_factor_t*)pb)->factor);
84 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
87 unsigned int iter = 0;
90 xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
92 smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
93 radical_elements = xbt_str_split(smpi_coef_string, ";");
94 xbt_dynar_foreach(radical_elements, iter, value) {
96 radical_elements2 = xbt_str_split(value, ":");
97 if (xbt_dynar_length(radical_elements2) <2 || xbt_dynar_length(radical_elements2) > 5)
98 xbt_die("Malformed radical for smpi factor!");
99 for(i =0; i<xbt_dynar_length(radical_elements2);i++ ){
101 fact.factor = atol(xbt_dynar_get_as(radical_elements2, i, char *));
103 fact.values[fact.nb_values] = atof(xbt_dynar_get_as(radical_elements2, i, char *));
108 xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
109 XBT_DEBUG("smpi_factor:\t%ld : %d values, first: %f", fact.factor, fact.nb_values ,fact.values[0]);
110 xbt_dynar_free(&radical_elements2);
112 xbt_dynar_free(&radical_elements);
114 xbt_dynar_sort(smpi_factor, &factor_cmp);
115 xbt_dynar_foreach(smpi_factor, iter, fact) {
116 XBT_DEBUG("smpi_factor:\t%ld : %d values, first: %f", fact.factor, fact.nb_values ,fact.values[0]);
121 static double smpi_os(double size)
123 if (!smpi_os_values) {
124 smpi_os_values = parse_factor(sg_cfg_get_string("smpi/os"));
125 smpi_register_static(smpi_os_values, xbt_dynar_free_voidp);
127 unsigned int iter = 0;
128 s_smpi_factor_t fact;
130 xbt_dynar_foreach(smpi_os_values, iter, fact) {
131 if (size <= fact.factor) {
132 XBT_DEBUG("os : %lf <= %ld return %f", size, fact.factor, current);
135 current=fact.values[0]+fact.values[1]*size;
138 XBT_DEBUG("os : %lf > %ld return %f", size, fact.factor, current);
143 static double smpi_ois(double size)
145 if (!smpi_ois_values) {
146 smpi_ois_values = parse_factor(sg_cfg_get_string("smpi/ois"));
147 smpi_register_static(smpi_ois_values, xbt_dynar_free_voidp);
149 unsigned int iter = 0;
150 s_smpi_factor_t fact;
152 xbt_dynar_foreach(smpi_ois_values, iter, fact) {
153 if (size <= fact.factor) {
154 XBT_DEBUG("ois : %lf <= %ld return %f", size, fact.factor, current);
157 current=fact.values[0]+fact.values[1]*size;
160 XBT_DEBUG("ois : %lf > %ld return %f", size, fact.factor, current);
165 static double smpi_or(double size)
167 if (!smpi_or_values) {
168 smpi_or_values = parse_factor(sg_cfg_get_string("smpi/or"));
169 smpi_register_static(smpi_or_values, xbt_dynar_free_voidp);
171 unsigned int iter = 0;
172 s_smpi_factor_t fact;
174 xbt_dynar_foreach(smpi_or_values, iter, fact) {
175 if (size <= fact.factor) {
176 XBT_DEBUG("or : %lf <= %ld return %f", size, fact.factor, current);
179 current=fact.values[0]+fact.values[1]*size;
181 XBT_DEBUG("or : %lf > %ld return %f", size, fact.factor, current);
186 static MPI_Request build_request(void *buf, int count,
187 MPI_Datatype datatype, int src, int dst,
188 int tag, MPI_Comm comm, unsigned flags)
192 void *old_buf = NULL;
194 request = xbt_new(s_smpi_mpi_request_t, 1);
196 s_smpi_subtype_t *subtype = datatype->substruct;
198 if(datatype->has_subtype == 1){
199 // This part handles the problem of non-contiguous memory
201 buf = count==0 ? NULL : xbt_malloc(count*smpi_datatype_size(datatype));
203 subtype->serialize(old_buf, buf, count, datatype->substruct);
208 // This part handles the problem of non-contiguous memory (for the
209 // unserialisation at the reception)
210 request->old_buf = old_buf;
211 request->old_type = datatype;
213 request->size = smpi_datatype_size(datatype) * count;
217 request->comm = comm;
218 request->action = NULL;
219 request->flags = flags;
220 request->detached = 0;
221 request->detached_sender = NULL;
222 request->real_src = 0;
224 request->truncated = 0;
225 request->real_size = 0;
226 request->real_tag = 0;
233 if (flags & SEND) smpi_datatype_unuse(datatype);
239 void smpi_empty_status(MPI_Status * status)
241 if(status != MPI_STATUS_IGNORE) {
242 status->MPI_SOURCE = MPI_ANY_SOURCE;
243 status->MPI_TAG = MPI_ANY_TAG;
244 status->MPI_ERROR = MPI_SUCCESS;
249 void smpi_action_trace_run(char *path)
253 xbt_dict_cursor_t cursor;
257 action_fp = fopen(path, "r");
258 xbt_assert(action_fp != NULL, "Cannot open %s: %s", path,
262 if (!xbt_dict_is_empty(action_queues)) {
264 ("Not all actions got consumed. If the simulation ended successfully (without deadlock), you may want to add new processes to your deployment file.");
267 xbt_dict_foreach(action_queues, cursor, name, todo) {
268 XBT_WARN("Still %lu actions for %s", xbt_dynar_length(todo), name);
274 xbt_dict_free(&action_queues);
275 action_queues = xbt_dict_new_homogeneous(NULL);
278 static void smpi_mpi_request_free_voidp(void* request)
280 MPI_Request req = request;
281 smpi_mpi_request_free(&req);
284 /* MPI Low level calls */
285 MPI_Request smpi_mpi_send_init(void *buf, int count, MPI_Datatype datatype,
286 int dst, int tag, MPI_Comm comm)
288 MPI_Request request =
289 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
290 comm, PERSISTENT | SEND | PREPARED);
295 MPI_Request smpi_mpi_ssend_init(void *buf, int count, MPI_Datatype datatype,
296 int dst, int tag, MPI_Comm comm)
298 MPI_Request request =
299 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
300 comm, PERSISTENT | SSEND | SEND | PREPARED);
305 MPI_Request smpi_mpi_recv_init(void *buf, int count, MPI_Datatype datatype,
306 int src, int tag, MPI_Comm comm)
308 MPI_Request request =
309 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
310 comm, PERSISTENT | RECV | PREPARED);
315 void smpi_mpi_start(MPI_Request request)
319 xbt_assert(!request->action,
320 "Cannot (re)start a non-finished communication");
321 if(request->flags & PREPARED)request->flags &= ~PREPARED;
322 if(request->flags & RECV) {
323 print_request("New recv", request);
324 //FIXME: if receive is posted with a large size, but send is smaller, mailboxes may not match !
325 if (request->size < sg_cfg_get_int("smpi/async_small_thres"))
326 mailbox = smpi_process_mailbox_small();
328 mailbox = smpi_process_mailbox();
329 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
330 request->real_size=request->size;
331 smpi_datatype_use(request->old_type);
332 smpi_comm_use(request->comm);
333 request->action = simcall_comm_irecv(mailbox, request->buf, &request->real_size, &match_recv, request);
335 //integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
336 double sleeptime = request->detached ? smpi_or(request->size) : 0.0;
338 simcall_process_sleep(sleeptime);
339 XBT_DEBUG("receiving size of %zu : sleep %lf ", request->size, smpi_or(request->size));
345 int receiver = request->dst;//smpi_group_index(smpi_comm_group(request->comm), request->dst);
348 int rank = smpi_process_index();
349 if (TRACE_smpi_view_internals()) {
350 TRACE_smpi_send(rank, rank, receiver,request->size);
353 /* if(receiver == MPI_UNDEFINED) {*/
354 /* XBT_WARN("Trying to send a message to a wrong rank");*/
357 print_request("New send", request);
358 if (request->size < sg_cfg_get_int("smpi/async_small_thres")) { // eager mode
359 mailbox = smpi_process_remote_mailbox_small(receiver);
361 XBT_DEBUG("Send request %p is not in the permanent receive mailbox (buf: %p)",request,request->buf);
362 mailbox = smpi_process_remote_mailbox(receiver);
364 if ( (! (request->flags & SSEND)) && (request->size < sg_cfg_get_int("smpi/send_is_detached_thres"))) {
366 request->detached = 1;
368 if(request->old_type->has_subtype == 0){
369 oldbuf = request->buf;
370 if (oldbuf && request->size!=0){
371 request->buf = xbt_malloc(request->size);
372 memcpy(request->buf,oldbuf,request->size);
375 XBT_DEBUG("Send request %p is detached; buf %p copied into %p",request,oldbuf,request->buf);
378 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
379 request->real_size=request->size;
380 smpi_datatype_use(request->old_type);
381 smpi_comm_use(request->comm);
383 //if we are giving back the control to the user without waiting for completion, we have to inject timings
384 double sleeptime =0.0;
385 if(request->detached || (request->flags & (ISEND|SSEND))){// issend should be treated as isend
386 //isend and send timings may be different
387 sleeptime = (request->flags & ISEND)? smpi_ois(request->size) : smpi_os(request->size);
391 simcall_process_sleep(sleeptime);
392 XBT_DEBUG("sending size of %zu : sleep %lf ", request->size, smpi_os(request->size));
396 simcall_comm_isend(mailbox, request->size, -1.0,
397 request->buf, request->real_size,
399 &smpi_mpi_request_free_voidp, // how to free the userdata if a detached send fails
401 // detach if msg size < eager/rdv switch limit
405 /* FIXME: detached sends are not traceable (request->action == NULL) */
407 simcall_set_category(request->action, TRACE_internal_smpi_get_category());
415 void smpi_mpi_startall(int count, MPI_Request * requests)
419 for(i = 0; i < count; i++) {
420 smpi_mpi_start(requests[i]);
424 void smpi_mpi_request_free(MPI_Request * request)
426 if((*request) != MPI_REQUEST_NULL){
427 (*request)->refcount--;
428 if((*request)->refcount<0) xbt_die("wrong refcount");
430 if((*request)->refcount==0){
431 print_request("Destroying", (*request));
433 *request = MPI_REQUEST_NULL;
435 print_request("Decrementing", (*request));
439 xbt_die("freeing an already free request");
443 MPI_Request smpi_isend_init(void *buf, int count, MPI_Datatype datatype,
444 int dst, int tag, MPI_Comm comm)
446 MPI_Request request =
447 build_request(buf==MPI_BOTTOM ? (void*)0 : buf , count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
448 comm, NON_PERSISTENT | ISEND | SEND | PREPARED);
453 MPI_Request smpi_mpi_isend(void *buf, int count, MPI_Datatype datatype,
454 int dst, int tag, MPI_Comm comm)
456 MPI_Request request =
457 build_request(buf==MPI_BOTTOM?(void*)0:buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
458 comm, NON_PERSISTENT | ISEND | SEND);
460 smpi_mpi_start(request);
464 MPI_Request smpi_mpi_issend(void *buf, int count, MPI_Datatype datatype,
465 int dst, int tag, MPI_Comm comm)
467 MPI_Request request =
468 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
469 comm, NON_PERSISTENT | ISEND | SSEND | SEND);
470 smpi_mpi_start(request);
476 MPI_Request smpi_irecv_init(void *buf, int count, MPI_Datatype datatype,
477 int src, int tag, MPI_Comm comm)
479 MPI_Request request =
480 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
481 comm, NON_PERSISTENT | RECV | PREPARED);
485 MPI_Request smpi_mpi_irecv(void *buf, int count, MPI_Datatype datatype,
486 int src, int tag, MPI_Comm comm)
488 MPI_Request request =
489 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
490 comm, NON_PERSISTENT | RECV);
492 smpi_mpi_start(request);
496 void smpi_mpi_recv(void *buf, int count, MPI_Datatype datatype, int src,
497 int tag, MPI_Comm comm, MPI_Status * status)
500 request = smpi_mpi_irecv(buf, count, datatype, src, tag, comm);
501 smpi_mpi_wait(&request, status);
506 void smpi_mpi_send(void *buf, int count, MPI_Datatype datatype, int dst,
507 int tag, MPI_Comm comm)
509 MPI_Request request =
510 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
511 comm, NON_PERSISTENT | SEND);
512 smpi_mpi_start(request);
513 smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
517 void smpi_mpi_ssend(void *buf, int count, MPI_Datatype datatype,
518 int dst, int tag, MPI_Comm comm)
520 MPI_Request request =
521 build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
522 comm, NON_PERSISTENT | SSEND | SEND);
524 smpi_mpi_start(request);
525 smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
528 void smpi_mpi_sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
529 int dst, int sendtag, void *recvbuf, int recvcount,
530 MPI_Datatype recvtype, int src, int recvtag,
531 MPI_Comm comm, MPI_Status * status)
533 MPI_Request requests[2];
535 int myid=smpi_process_index();
536 if ((smpi_group_index(smpi_comm_group(comm), dst) == myid) && (smpi_group_index(smpi_comm_group(comm), src) == myid)) {
537 smpi_datatype_copy(sendbuf, sendcount, sendtype,
538 recvbuf, recvcount, recvtype);
542 smpi_isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
544 smpi_irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm);
545 smpi_mpi_startall(2, requests);
546 smpi_mpi_waitall(2, requests, stats);
547 if(status != MPI_STATUS_IGNORE) {
548 // Copy receive status
553 int smpi_mpi_get_count(MPI_Status * status, MPI_Datatype datatype)
555 return status->count / smpi_datatype_size(datatype);
558 static void finish_wait(MPI_Request * request, MPI_Status * status)
560 MPI_Request req = *request;
561 if(status != MPI_STATUS_IGNORE)
562 smpi_empty_status(status);
564 if(!(req->detached && req->flags & SEND) && !(req->flags & PREPARED)){
565 if(status != MPI_STATUS_IGNORE) {
566 int src = req->src == MPI_ANY_SOURCE ? req->real_src : req->src;
567 status->MPI_SOURCE = smpi_group_rank(smpi_comm_group(req->comm), src);
568 status->MPI_TAG = req->tag == MPI_ANY_TAG ? req->real_tag : req->tag;
569 status->MPI_ERROR = req->truncated ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
570 // this handles the case were size in receive differs from size in send
571 // FIXME: really this should just contain the count of receive-type blocks,
573 status->count = req->real_size;
576 print_request("Finishing", req);
577 MPI_Datatype datatype = req->old_type;
579 if(datatype->has_subtype == 1){
580 // This part handles the problem of non-contignous memory
581 // the unserialization at the reception
582 s_smpi_subtype_t *subtype = datatype->substruct;
583 if(req->flags & RECV) {
584 subtype->unserialize(req->buf, req->old_buf, req->real_size/smpi_datatype_size(datatype) , datatype->substruct);
586 if(req->detached == 0) free(req->buf);
588 smpi_comm_unuse(req->comm);
589 smpi_datatype_unuse(datatype);
594 if (TRACE_smpi_view_internals()) {
595 if(req->flags & RECV){
596 int rank = smpi_process_index();
597 int src_traced = (req->src == MPI_ANY_SOURCE ? req->real_src : req->src);
598 TRACE_smpi_recv(rank, src_traced, rank);
603 if(req->detached_sender!=NULL){
604 smpi_mpi_request_free(&(req->detached_sender));
607 if(req->flags & NON_PERSISTENT) {
608 smpi_mpi_request_free(request);
614 int smpi_mpi_test(MPI_Request * request, MPI_Status * status) {
617 //assume that request is not MPI_REQUEST_NULL (filtered in PMPI_Test or smpi_mpi_testall before)
618 if ((*request)->action == NULL)
621 flag = simcall_comm_test((*request)->action);
623 finish_wait(request, status);
624 request=MPI_REQUEST_NULL;
626 smpi_empty_status(status);
631 int smpi_mpi_testany(int count, MPI_Request requests[], int *index,
638 *index = MPI_UNDEFINED;
640 comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
641 map = xbt_new(int, count);
643 for(i = 0; i < count; i++) {
644 if((requests[i]!=MPI_REQUEST_NULL) && requests[i]->action) {
645 xbt_dynar_push(comms, &requests[i]->action);
651 i = simcall_comm_testany(comms);
652 // not MPI_UNDEFINED, as this is a simix return code
655 finish_wait(&requests[*index], status);
659 //all requests are null or inactive, return true
661 smpi_empty_status(status);
664 xbt_dynar_free(&comms);
670 int smpi_mpi_testall(int count, MPI_Request requests[],
674 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
677 for(i=0; i<count; i++){
678 if(requests[i]!= MPI_REQUEST_NULL){
679 if (smpi_mpi_test(&requests[i], pstat)!=1){
682 requests[i]=MPI_REQUEST_NULL;
685 smpi_empty_status(pstat);
687 if(status != MPI_STATUSES_IGNORE) {
694 void smpi_mpi_probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
696 //FIXME find another wait to avoid busy waiting ?
697 // the issue here is that we have to wait on a nonexistent comm
699 smpi_mpi_iprobe(source, tag, comm, &flag, status);
700 XBT_DEBUG("Busy Waiting on probing : %d", flag);
704 void smpi_mpi_iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
706 MPI_Request request =build_request(NULL, 0, MPI_CHAR, source == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), source), smpi_comm_rank(comm), tag,
707 comm, NON_PERSISTENT | RECV);
709 //to avoid deadlock, we have to sleep some time here, or the timer won't advance and we will only do iprobe simcalls
710 double sleeptime= sg_cfg_get_double("smpi/iprobe");
711 //multiplier to the sleeptime, to increase speed of execution, each failed iprobe will increase it
712 static int nsleeps = 1;
714 simcall_process_sleep(sleeptime);
716 // behave like a receive, but don't do it
719 print_request("New iprobe", request);
720 // We have to test both mailboxes as we don't know if we will receive one one or another
721 if (sg_cfg_get_int("smpi/async_small_thres")>0){
722 mailbox = smpi_process_mailbox_small();
723 XBT_DEBUG("trying to probe the perm recv mailbox");
724 request->action = simcall_comm_iprobe(mailbox, request->src, request->tag, &match_recv, (void*)request);
726 if (request->action==NULL){
727 mailbox = smpi_process_mailbox();
728 XBT_DEBUG("trying to probe the other mailbox");
729 request->action = simcall_comm_iprobe(mailbox, request->src, request->tag, &match_recv, (void*)request);
733 MPI_Request req = (MPI_Request)SIMIX_comm_get_src_data(request->action);
735 if(status != MPI_STATUS_IGNORE && !(req->flags & PREPARED)) {
736 status->MPI_SOURCE = smpi_group_rank(smpi_comm_group(comm), req->src);
737 status->MPI_TAG = req->tag;
738 status->MPI_ERROR = MPI_SUCCESS;
739 status->count = req->real_size;
741 nsleeps=1;//reset the number of sleeps we will do next time
747 smpi_mpi_request_free(&request);
752 void smpi_mpi_wait(MPI_Request * request, MPI_Status * status)
754 print_request("Waiting", *request);
755 if ((*request)->action != NULL) { // this is not a detached send
756 simcall_comm_wait((*request)->action, -1.0);
758 finish_wait(request, status);
759 request=MPI_REQUEST_NULL;
760 // FIXME for a detached send, finish_wait is not called:
763 int smpi_mpi_waitany(int count, MPI_Request requests[],
770 index = MPI_UNDEFINED;
772 // Wait for a request to complete
773 comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
774 map = xbt_new(int, count);
776 XBT_DEBUG("Wait for one of %d", count);
777 for(i = 0; i < count; i++) {
778 if(requests[i] != MPI_REQUEST_NULL) {
779 if (requests[i]->action != NULL) {
780 XBT_DEBUG("Waiting any %p ", requests[i]);
781 xbt_dynar_push(comms, &requests[i]->action);
785 //This is a finished detached request, let's return this one
786 size=0;//so we free the dynar but don't do the waitany call
788 finish_wait(&requests[i], status);//cleanup if refcount = 0
789 requests[i]=MPI_REQUEST_NULL;//set to null
795 i = simcall_comm_waitany(comms);
797 // not MPI_UNDEFINED, as this is a simix return code
800 finish_wait(&requests[index], status);
804 xbt_dynar_free(&comms);
807 if (index==MPI_UNDEFINED)
808 smpi_empty_status(status);
813 int smpi_mpi_waitall(int count, MPI_Request requests[],
818 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
819 int retvalue = MPI_SUCCESS;
820 //tag invalid requests in the set
821 if (status != MPI_STATUSES_IGNORE) {
822 for (c = 0; c < count; c++) {
823 if (requests[c] == MPI_REQUEST_NULL || requests[c]->dst == MPI_PROC_NULL) {
824 smpi_empty_status(&status[c]);
825 } else if (requests[c]->src == MPI_PROC_NULL) {
826 smpi_empty_status(&status[c]);
827 status[c].MPI_SOURCE = MPI_PROC_NULL;
831 for(c = 0; c < count; c++) {
832 if (MC_is_active()) {
833 smpi_mpi_wait(&requests[c], pstat);
836 index = smpi_mpi_waitany(count, requests, pstat);
837 if (index == MPI_UNDEFINED)
839 requests[index]=MPI_REQUEST_NULL;
841 if (status != MPI_STATUSES_IGNORE) {
842 status[index] = *pstat;
843 if (status[index].MPI_ERROR == MPI_ERR_TRUNCATE)
844 retvalue = MPI_ERR_IN_STATUS;
851 int smpi_mpi_waitsome(int incount, MPI_Request requests[], int *indices,
856 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
859 for(i = 0; i < incount; i++)
861 index=smpi_mpi_waitany(incount, requests, pstat);
862 if(index!=MPI_UNDEFINED){
863 indices[count] = index;
865 if(status != MPI_STATUSES_IGNORE) {
866 status[index] = *pstat;
868 requests[index]=MPI_REQUEST_NULL;
870 return MPI_UNDEFINED;
876 int smpi_mpi_testsome(int incount, MPI_Request requests[], int *indices,
879 int i, count, count_dead;
881 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
885 for(i = 0; i < incount; i++) {
886 if((requests[i] != MPI_REQUEST_NULL)) {
887 if(smpi_mpi_test(&requests[i], pstat)) {
890 if(status != MPI_STATUSES_IGNORE) {
893 requests[i]=MPI_REQUEST_NULL;
900 if(count_dead==incount)return MPI_UNDEFINED;
904 void smpi_mpi_bcast(void *buf, int count, MPI_Datatype datatype, int root,
907 // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI))
908 nary_tree_bcast(buf, count, datatype, root, comm, 4);
911 void smpi_mpi_barrier(MPI_Comm comm)
913 // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI))
914 nary_tree_barrier(comm, 4);
917 void smpi_mpi_gather(void *sendbuf, int sendcount, MPI_Datatype sendtype,
918 void *recvbuf, int recvcount, MPI_Datatype recvtype,
919 int root, MPI_Comm comm)
921 int system_tag = COLL_TAG_GATHER;
922 int rank, size, src, index;
923 MPI_Aint lb = 0, recvext = 0;
924 MPI_Request *requests;
926 rank = smpi_comm_rank(comm);
927 size = smpi_comm_size(comm);
929 // Send buffer to root
930 smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
932 // FIXME: check for errors
933 smpi_datatype_extent(recvtype, &lb, &recvext);
934 // Local copy from root
935 smpi_datatype_copy(sendbuf, sendcount, sendtype,
936 (char *)recvbuf + root * recvcount * recvext, recvcount, recvtype);
937 // Receive buffers from senders
938 requests = xbt_new(MPI_Request, size - 1);
940 for(src = 0; src < size; src++) {
942 requests[index] = smpi_irecv_init((char *)recvbuf + src * recvcount * recvext,
944 src, system_tag, comm);
948 // Wait for completion of irecv's.
949 smpi_mpi_startall(size - 1, requests);
950 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
956 void smpi_mpi_reduce_scatter(void *sendbuf, void *recvbuf, int *recvcounts,
957 MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
961 int rank = smpi_process_index();
964 /* arbitrarily choose root as rank 0 */
965 size = smpi_comm_size(comm);
967 displs = xbt_new(int, size);
968 for (i = 0; i < size; i++) {
970 count += recvcounts[i];
972 tmpbuf=(void*)xbt_malloc(count*smpi_datatype_get_extent(datatype));
973 mpi_coll_reduce_fun(sendbuf, tmpbuf, count, datatype, op, 0, comm);
974 smpi_mpi_scatterv(tmpbuf, recvcounts, displs, datatype, recvbuf,
975 recvcounts[rank], datatype, 0, comm);
980 void smpi_mpi_gatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
981 void *recvbuf, int *recvcounts, int *displs,
982 MPI_Datatype recvtype, int root, MPI_Comm comm)
984 int system_tag = COLL_TAG_GATHERV;
985 int rank, size, src, index;
986 MPI_Aint lb = 0, recvext = 0;
987 MPI_Request *requests;
989 rank = smpi_comm_rank(comm);
990 size = smpi_comm_size(comm);
992 // Send buffer to root
993 smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
995 // FIXME: check for errors
996 smpi_datatype_extent(recvtype, &lb, &recvext);
997 // Local copy from root
998 smpi_datatype_copy(sendbuf, sendcount, sendtype,
999 (char *)recvbuf + displs[root] * recvext,
1000 recvcounts[root], recvtype);
1001 // Receive buffers from senders
1002 requests = xbt_new(MPI_Request, size - 1);
1004 for(src = 0; src < size; src++) {
1007 smpi_irecv_init((char *)recvbuf + displs[src] * recvext,
1008 recvcounts[src], recvtype, src, system_tag, comm);
1012 // Wait for completion of irecv's.
1013 smpi_mpi_startall(size - 1, requests);
1014 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
1019 void smpi_mpi_allgather(void *sendbuf, int sendcount,
1020 MPI_Datatype sendtype, void *recvbuf,
1021 int recvcount, MPI_Datatype recvtype,
1024 int system_tag = COLL_TAG_ALLGATHER;
1025 int rank, size, other, index;
1026 MPI_Aint lb = 0, recvext = 0;
1027 MPI_Request *requests;
1029 rank = smpi_comm_rank(comm);
1030 size = smpi_comm_size(comm);
1031 // FIXME: check for errors
1032 smpi_datatype_extent(recvtype, &lb, &recvext);
1033 // Local copy from self
1034 smpi_datatype_copy(sendbuf, sendcount, sendtype,
1035 (char *)recvbuf + rank * recvcount * recvext, recvcount,
1037 // Send/Recv buffers to/from others;
1038 requests = xbt_new(MPI_Request, 2 * (size - 1));
1040 for(other = 0; other < size; other++) {
1043 smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag,
1046 requests[index] = smpi_irecv_init((char *)recvbuf + other * recvcount * recvext,
1047 recvcount, recvtype, other,
1052 // Wait for completion of all comms.
1053 smpi_mpi_startall(2 * (size - 1), requests);
1054 smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
1058 void smpi_mpi_allgatherv(void *sendbuf, int sendcount,
1059 MPI_Datatype sendtype, void *recvbuf,
1060 int *recvcounts, int *displs,
1061 MPI_Datatype recvtype, MPI_Comm comm)
1063 int system_tag = COLL_TAG_ALLGATHERV;
1064 int rank, size, other, index;
1065 MPI_Aint lb = 0, recvext = 0;
1066 MPI_Request *requests;
1068 rank = smpi_comm_rank(comm);
1069 size = smpi_comm_size(comm);
1070 // FIXME: check for errors
1071 smpi_datatype_extent(recvtype, &lb, &recvext);
1072 // Local copy from self
1073 smpi_datatype_copy(sendbuf, sendcount, sendtype,
1074 (char *)recvbuf + displs[rank] * recvext,
1075 recvcounts[rank], recvtype);
1076 // Send buffers to others;
1077 requests = xbt_new(MPI_Request, 2 * (size - 1));
1079 for(other = 0; other < size; other++) {
1082 smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag,
1086 smpi_irecv_init((char *)recvbuf + displs[other] * recvext, recvcounts[other],
1087 recvtype, other, system_tag, comm);
1091 // Wait for completion of all comms.
1092 smpi_mpi_startall(2 * (size - 1), requests);
1093 smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
1097 void smpi_mpi_scatter(void *sendbuf, int sendcount, MPI_Datatype sendtype,
1098 void *recvbuf, int recvcount, MPI_Datatype recvtype,
1099 int root, MPI_Comm comm)
1101 int system_tag = COLL_TAG_SCATTER;
1102 int rank, size, dst, index;
1103 MPI_Aint lb = 0, sendext = 0;
1104 MPI_Request *requests;
1106 rank = smpi_comm_rank(comm);
1107 size = smpi_comm_size(comm);
1109 // Recv buffer from root
1110 smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm,
1113 // FIXME: check for errors
1114 smpi_datatype_extent(sendtype, &lb, &sendext);
1115 // Local copy from root
1116 if(recvbuf!=MPI_IN_PLACE){
1117 smpi_datatype_copy((char *)sendbuf + root * sendcount * sendext,
1118 sendcount, sendtype, recvbuf, recvcount, recvtype);
1120 // Send buffers to receivers
1121 requests = xbt_new(MPI_Request, size - 1);
1123 for(dst = 0; dst < size; dst++) {
1125 requests[index] = smpi_isend_init((char *)sendbuf + dst * sendcount * sendext,
1126 sendcount, sendtype, dst,
1131 // Wait for completion of isend's.
1132 smpi_mpi_startall(size - 1, requests);
1133 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
1138 void smpi_mpi_scatterv(void *sendbuf, int *sendcounts, int *displs,
1139 MPI_Datatype sendtype, void *recvbuf, int recvcount,
1140 MPI_Datatype recvtype, int root, MPI_Comm comm)
1142 int system_tag = COLL_TAG_SCATTERV;
1143 int rank, size, dst, index;
1144 MPI_Aint lb = 0, sendext = 0;
1145 MPI_Request *requests;
1147 rank = smpi_comm_rank(comm);
1148 size = smpi_comm_size(comm);
1150 // Recv buffer from root
1151 smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm,
1154 // FIXME: check for errors
1155 smpi_datatype_extent(sendtype, &lb, &sendext);
1156 // Local copy from root
1157 if(recvbuf!=MPI_IN_PLACE){
1158 smpi_datatype_copy((char *)sendbuf + displs[root] * sendext, sendcounts[root],
1159 sendtype, recvbuf, recvcount, recvtype);
1161 // Send buffers to receivers
1162 requests = xbt_new(MPI_Request, size - 1);
1164 for(dst = 0; dst < size; dst++) {
1167 smpi_isend_init((char *)sendbuf + displs[dst] * sendext, sendcounts[dst],
1168 sendtype, dst, system_tag, comm);
1172 // Wait for completion of isend's.
1173 smpi_mpi_startall(size - 1, requests);
1174 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
1179 void smpi_mpi_reduce(void *sendbuf, void *recvbuf, int count,
1180 MPI_Datatype datatype, MPI_Op op, int root,
1183 int system_tag = COLL_TAG_REDUCE;
1184 int rank, size, src, index;
1185 MPI_Aint lb = 0, dataext = 0;
1186 MPI_Request *requests;
1190 char* sendtmpbuf = (char*) sendbuf;
1191 if( sendbuf == MPI_IN_PLACE ) {
1192 sendtmpbuf = (char *)xbt_malloc(count*smpi_datatype_get_extent(datatype));
1193 smpi_datatype_copy(recvbuf, count, datatype,sendtmpbuf, count, datatype);
1196 rank = smpi_comm_rank(comm);
1197 size = smpi_comm_size(comm);
1198 //non commutative case, use a working algo from openmpi
1199 if(!smpi_op_is_commute(op)){
1200 smpi_coll_tuned_reduce_ompi_basic_linear(sendtmpbuf, recvbuf, count,
1201 datatype, op, root, comm);
1206 // Send buffer to root
1207 smpi_mpi_send(sendtmpbuf, count, datatype, root, system_tag, comm);
1209 // FIXME: check for errors
1210 smpi_datatype_extent(datatype, &lb, &dataext);
1211 // Local copy from root
1212 if (sendtmpbuf && recvbuf)
1213 smpi_datatype_copy(sendtmpbuf, count, datatype, recvbuf, count, datatype);
1214 // Receive buffers from senders
1215 //TODO: make a MPI_barrier here ?
1216 requests = xbt_new(MPI_Request, size - 1);
1217 tmpbufs = xbt_new(void *, size - 1);
1219 for(src = 0; src < size; src++) {
1221 // FIXME: possibly overkill we we have contiguous/noncontiguous data
1223 tmpbufs[index] = xbt_malloc(count * dataext);
1225 smpi_irecv_init(tmpbufs[index], count, datatype, src,
1230 // Wait for completion of irecv's.
1231 smpi_mpi_startall(size - 1, requests);
1232 for(src = 0; src < size - 1; src++) {
1233 index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
1234 XBT_DEBUG("finished waiting any request with index %d", index);
1235 if(index == MPI_UNDEFINED) {
1238 if(op) /* op can be MPI_OP_NULL that does nothing */
1239 smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
1241 for(index = 0; index < size - 1; index++) {
1242 xbt_free(tmpbufs[index]);
1247 if( sendbuf == MPI_IN_PLACE ) {
1248 xbt_free(sendtmpbuf);
1253 void smpi_mpi_allreduce(void *sendbuf, void *recvbuf, int count,
1254 MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
1256 smpi_mpi_reduce(sendbuf, recvbuf, count, datatype, op, 0, comm);
1257 smpi_mpi_bcast(recvbuf, count, datatype, 0, comm);
1260 void smpi_mpi_scan(void *sendbuf, void *recvbuf, int count,
1261 MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
1263 int system_tag = -888;
1264 int rank, size, other, index;
1265 MPI_Aint lb = 0, dataext = 0;
1266 MPI_Request *requests;
1269 rank = smpi_comm_rank(comm);
1270 size = smpi_comm_size(comm);
1272 // FIXME: check for errors
1273 smpi_datatype_extent(datatype, &lb, &dataext);
1275 // Local copy from self
1276 smpi_datatype_copy(sendbuf, count, datatype, recvbuf, count, datatype);
1278 // Send/Recv buffers to/from others;
1279 requests = xbt_new(MPI_Request, size - 1);
1280 tmpbufs = xbt_new(void *, rank);
1282 for(other = 0; other < rank; other++) {
1283 // FIXME: possibly overkill we we have contiguous/noncontiguous data
1285 tmpbufs[index] = xbt_malloc(count * dataext);
1287 smpi_irecv_init(tmpbufs[index], count, datatype, other, system_tag,
1291 for(other = rank + 1; other < size; other++) {
1293 smpi_isend_init(sendbuf, count, datatype, other, system_tag, comm);
1296 // Wait for completion of all comms.
1297 smpi_mpi_startall(size - 1, requests);
1299 if(smpi_op_is_commute(op)){
1300 for(other = 0; other < size - 1; other++) {
1301 index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
1302 if(index == MPI_UNDEFINED) {
1306 // #Request is below rank: it's a irecv
1307 smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
1311 //non commutative case, wait in order
1312 for(other = 0; other < size - 1; other++) {
1313 smpi_mpi_wait(&(requests[other]), MPI_STATUS_IGNORE);
1315 smpi_op_apply(op, tmpbufs[other], recvbuf, &count, &datatype);
1319 for(index = 0; index < rank; index++) {
1320 xbt_free(tmpbufs[index]);
1326 void smpi_mpi_exscan(void *sendbuf, void *recvbuf, int count,
1327 MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
1329 int system_tag = -888;
1330 int rank, size, other, index;
1331 MPI_Aint lb = 0, dataext = 0;
1332 MPI_Request *requests;
1334 int recvbuf_is_empty=1;
1335 rank = smpi_comm_rank(comm);
1336 size = smpi_comm_size(comm);
1338 // FIXME: check for errors
1339 smpi_datatype_extent(datatype, &lb, &dataext);
1341 // Send/Recv buffers to/from others;
1342 requests = xbt_new(MPI_Request, size - 1);
1343 tmpbufs = xbt_new(void *, rank);
1345 for(other = 0; other < rank; other++) {
1346 // FIXME: possibly overkill we we have contiguous/noncontiguous data
1348 tmpbufs[index] = xbt_malloc(count * dataext);
1350 smpi_irecv_init(tmpbufs[index], count, datatype, other, system_tag,
1354 for(other = rank + 1; other < size; other++) {
1356 smpi_isend_init(sendbuf, count, datatype, other, system_tag, comm);
1359 // Wait for completion of all comms.
1360 smpi_mpi_startall(size - 1, requests);
1361 if(smpi_op_is_commute(op)){
1362 for(other = 0; other < size - 1; other++) {
1363 index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
1364 if(index == MPI_UNDEFINED) {
1368 if(recvbuf_is_empty){
1369 smpi_datatype_copy(tmpbufs[index], count, datatype, recvbuf, count, datatype);
1372 // #Request is below rank: it's a irecv
1373 smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
1377 //non commutative case, wait in order
1378 for(other = 0; other < size - 1; other++) {
1379 smpi_mpi_wait(&(requests[other]), MPI_STATUS_IGNORE);
1381 if(recvbuf_is_empty){
1382 smpi_datatype_copy(tmpbufs[other], count, datatype, recvbuf, count, datatype);
1384 }else smpi_op_apply(op, tmpbufs[other], recvbuf, &count, &datatype);
1388 for(index = 0; index < rank; index++) {
1389 xbt_free(tmpbufs[index]);