1 /* Copyright (c) 2007, 2008, 2009, 2010. 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"
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 == 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
41 static int match_send(void* a, void* b,smx_action_t ignored) {
42 MPI_Request ref = (MPI_Request)a;
43 MPI_Request req = (MPI_Request)b;
44 XBT_DEBUG("Trying to match a send of src %d against %d, tag %d against %d",ref->src,req->src, ref->tag, req->tag);
45 xbt_assert(ref, "Cannot match send against null reference");
46 xbt_assert(req, "Cannot match send against null request");
48 if((req->src == MPI_ANY_SOURCE || req->src == ref->src)
49 && (req->tag == MPI_ANY_TAG || req->tag == ref->tag))
51 if(req->src == MPI_ANY_SOURCE)req->real_src = ref->src;
52 if(req->tag == MPI_ANY_TAG)req->real_tag = ref->tag;
53 if(req->real_size < ref->real_size) req->truncated = 1;
55 req->detached_sender=ref; //tie the sender to the receiver, as it is detached and has to be freed in the receiver
63 typedef struct s_smpi_factor *smpi_factor_t;
64 typedef struct s_smpi_factor {
67 double values[4];//arbitrary set to 4
69 xbt_dynar_t smpi_os_values = NULL;
70 xbt_dynar_t smpi_or_values = NULL;
71 xbt_dynar_t smpi_ois_values = NULL;
73 // Methods used to parse and store the values for timing injections in smpi
74 // These are taken from surf/network.c and generalized to have more factors
75 // These methods should be merged with those in surf/network.c (moved somewhere in xbt ?)
77 static int factor_cmp(const void *pa, const void *pb)
79 return (((s_smpi_factor_t*)pa)->factor > ((s_smpi_factor_t*)pb)->factor);
83 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
86 unsigned int iter = 0;
89 xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
91 smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
92 radical_elements = xbt_str_split(smpi_coef_string, ";");
93 xbt_dynar_foreach(radical_elements, iter, value) {
95 radical_elements2 = xbt_str_split(value, ":");
96 if (xbt_dynar_length(radical_elements2) <2 || xbt_dynar_length(radical_elements2) > 5)
97 xbt_die("Malformed radical for smpi factor!");
98 for(i =0; i<xbt_dynar_length(radical_elements2);i++ ){
100 fact.factor = atol(xbt_dynar_get_as(radical_elements2, i, char *));
102 fact.values[fact.nb_values] = atof(xbt_dynar_get_as(radical_elements2, i, char *));
107 xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
108 XBT_DEBUG("smpi_factor:\t%ld : %d values, first: %f", fact.factor, fact.nb_values ,fact.values[0]);
109 xbt_dynar_free(&radical_elements2);
111 xbt_dynar_free(&radical_elements);
113 xbt_dynar_sort(smpi_factor, &factor_cmp);
114 xbt_dynar_foreach(smpi_factor, iter, fact) {
115 XBT_DEBUG("smpi_factor:\t%ld : %d values, first: %f", fact.factor, fact.nb_values ,fact.values[0]);
120 static double smpi_os(double size)
124 parse_factor(sg_cfg_get_string("smpi/os"));
126 unsigned int iter = 0;
127 s_smpi_factor_t fact;
129 xbt_dynar_foreach(smpi_os_values, iter, fact) {
130 if (size <= fact.factor) {
131 XBT_DEBUG("os : %lf <= %ld return %f", size, fact.factor, current);
134 current=fact.values[0]+fact.values[1]*size;
137 XBT_DEBUG("os : %lf > %ld return %f", size, fact.factor, current);
142 static double smpi_ois(double size)
144 if (!smpi_ois_values)
146 parse_factor(sg_cfg_get_string("smpi/ois"));
148 unsigned int iter = 0;
149 s_smpi_factor_t fact;
151 xbt_dynar_foreach(smpi_ois_values, iter, fact) {
152 if (size <= fact.factor) {
153 XBT_DEBUG("ois : %lf <= %ld return %f", size, fact.factor, current);
156 current=fact.values[0]+fact.values[1]*size;
159 XBT_DEBUG("ois : %lf > %ld return %f", size, fact.factor, current);
164 static double smpi_or(double size)
168 parse_factor(sg_cfg_get_string("smpi/or"));
170 unsigned int iter = 0;
171 s_smpi_factor_t fact;
173 xbt_dynar_foreach(smpi_or_values, iter, fact) {
174 if (size <= fact.factor) {
175 XBT_DEBUG("or : %lf <= %ld return %f", size, fact.factor, current);
178 current=fact.values[0]+fact.values[1]*size;
180 XBT_DEBUG("or : %lf > %ld return %f", size, fact.factor, current);
185 static MPI_Request build_request(void *buf, int count,
186 MPI_Datatype datatype, int src, int dst,
187 int tag, MPI_Comm comm, unsigned flags)
191 void *old_buf = NULL;
193 request = xbt_new(s_smpi_mpi_request_t, 1);
195 s_smpi_subtype_t *subtype = datatype->substruct;
197 if(datatype->has_subtype == 1){
198 // This part handles the problem of non-contiguous memory
200 buf = xbt_malloc(count*smpi_datatype_size(datatype));
202 subtype->serialize(old_buf, buf, count, datatype->substruct);
207 // This part handles the problem of non-contiguous memory (for the
208 // unserialisation at the reception)
209 request->old_buf = old_buf;
210 request->old_type = datatype;
212 request->size = smpi_datatype_size(datatype) * count;
216 request->comm = comm;
217 request->action = NULL;
218 request->flags = flags;
219 request->detached = 0;
220 request->detached_sender = NULL;
222 request->truncated = 0;
223 request->real_size = 0;
224 request->real_tag = 0;
231 if (flags & SEND) smpi_datatype_unuse(datatype);
237 void smpi_empty_status(MPI_Status * status) {
238 if(status != MPI_STATUS_IGNORE) {
239 status->MPI_SOURCE=MPI_ANY_SOURCE;
240 status->MPI_TAG=MPI_ANY_TAG;
245 void smpi_action_trace_run(char *path)
249 xbt_dict_cursor_t cursor;
253 action_fp = fopen(path, "r");
254 xbt_assert(action_fp != NULL, "Cannot open %s: %s", path,
258 if (!xbt_dict_is_empty(action_queues)) {
260 ("Not all actions got consumed. If the simulation ended successfully (without deadlock), you may want to add new processes to your deployment file.");
263 xbt_dict_foreach(action_queues, cursor, name, todo) {
264 XBT_WARN("Still %lu actions for %s", xbt_dynar_length(todo), name);
270 xbt_dict_free(&action_queues);
271 action_queues = xbt_dict_new_homogeneous(NULL);
274 static void smpi_mpi_request_free_voidp(void* request)
276 MPI_Request req = request;
277 smpi_mpi_request_free(&req);
280 /* MPI Low level calls */
281 MPI_Request smpi_mpi_send_init(void *buf, int count, MPI_Datatype datatype,
282 int dst, int tag, MPI_Comm comm)
284 MPI_Request request =
285 build_request(buf, count, datatype, smpi_comm_rank(comm), dst, tag,
286 comm, PERSISTENT | SEND);
291 MPI_Request smpi_mpi_ssend_init(void *buf, int count, MPI_Datatype datatype,
292 int dst, int tag, MPI_Comm comm)
294 MPI_Request request =
295 build_request(buf, count, datatype, smpi_comm_rank(comm), dst, tag,
296 comm, PERSISTENT | SSEND | SEND);
301 MPI_Request smpi_mpi_recv_init(void *buf, int count, MPI_Datatype datatype,
302 int src, int tag, MPI_Comm comm)
304 MPI_Request request =
305 build_request(buf, count, datatype, src, smpi_comm_rank(comm), tag,
306 comm, PERSISTENT | RECV);
311 void smpi_mpi_start(MPI_Request request)
315 xbt_assert(!request->action,
316 "Cannot (re)start a non-finished communication");
317 if(request->flags & RECV) {
318 print_request("New recv", request);
319 if (request->size < sg_cfg_get_int("smpi/async_small_thres"))
320 mailbox = smpi_process_mailbox_small();
322 mailbox = smpi_process_mailbox();
323 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
324 request->real_size=request->size;
325 smpi_datatype_use(request->old_type);
326 request->action = simcall_comm_irecv(mailbox, request->buf, &request->real_size, &match_recv, request);
328 double sleeptime = smpi_or(request->size);
330 simcall_process_sleep(sleeptime);
331 XBT_DEBUG("receiving size of %zu : sleep %lf ", request->size, smpi_or(request->size));
336 int receiver = smpi_group_index(smpi_comm_group(request->comm), request->dst);
337 /* if(receiver == MPI_UNDEFINED) {*/
338 /* XBT_WARN("Trying to send a message to a wrong rank");*/
341 print_request("New send", request);
342 if (request->size < sg_cfg_get_int("smpi/async_small_thres")) { // eager mode
343 mailbox = smpi_process_remote_mailbox_small(receiver);
345 XBT_DEBUG("Send request %p is not in the permanent receive mailbox (buf: %p)",request,request->buf);
346 mailbox = smpi_process_remote_mailbox(receiver);
348 if ( (! (request->flags & SSEND)) && (request->size < sg_cfg_get_int("smpi/send_is_detached_thres"))) {
350 request->detached = 1;
352 if(request->old_type->has_subtype == 0){
353 oldbuf = request->buf;
355 request->buf = xbt_malloc(request->size);
356 memcpy(request->buf,oldbuf,request->size);
359 XBT_DEBUG("Send request %p is detached; buf %p copied into %p",request,oldbuf,request->buf);
361 // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
362 request->real_size=request->size;
363 smpi_datatype_use(request->old_type);
365 //if we are giving back the control to the user without waiting for completion, we have to inject timings
366 double sleeptime =0.0;
367 if(request->detached && !(request->flags & ISEND))
368 sleeptime = smpi_os(request->size);
370 sleeptime = smpi_ois(request->size);
373 simcall_process_sleep(sleeptime);
374 XBT_DEBUG("sending size of %zu : sleep %lf ", request->size, smpi_os(request->size));
377 simcall_comm_isend(mailbox, request->size, -1.0,
378 request->buf, request->real_size,
380 &smpi_mpi_request_free_voidp, // how to free the userdata if a detached send fails
382 // detach if msg size < eager/rdv switch limit
386 /* FIXME: detached sends are not traceable (request->action == NULL) */
388 simcall_set_category(request->action, TRACE_internal_smpi_get_category());
395 void smpi_mpi_startall(int count, MPI_Request * requests)
399 for(i = 0; i < count; i++) {
400 smpi_mpi_start(requests[i]);
404 void smpi_mpi_request_free(MPI_Request * request)
407 if((*request) != MPI_REQUEST_NULL){
408 (*request)->refcount--;
409 if((*request)->refcount<0) xbt_die("wrong refcount");
411 if((*request)->refcount==0){
413 *request = MPI_REQUEST_NULL;
416 xbt_die("freeing an already free request");
420 MPI_Request smpi_isend_init(void *buf, int count, MPI_Datatype datatype,
421 int dst, int tag, MPI_Comm comm)
423 MPI_Request request =
424 build_request(buf, count, datatype, smpi_comm_rank(comm), dst, tag,
425 comm, NON_PERSISTENT | SEND);
430 MPI_Request smpi_mpi_isend(void *buf, int count, MPI_Datatype datatype,
431 int dst, int tag, MPI_Comm comm)
433 MPI_Request request =
434 build_request(buf, count, datatype, smpi_comm_rank(comm), dst, tag,
435 comm, NON_PERSISTENT | ISEND | SEND);
437 smpi_mpi_start(request);
441 MPI_Request smpi_mpi_issend(void *buf, int count, MPI_Datatype datatype,
442 int dst, int tag, MPI_Comm comm)
444 MPI_Request request =
445 build_request(buf, count, datatype, smpi_comm_rank(comm), dst, tag,
446 comm, NON_PERSISTENT | ISEND | SSEND | SEND);
447 smpi_mpi_start(request);
453 MPI_Request smpi_irecv_init(void *buf, int count, MPI_Datatype datatype,
454 int src, int tag, MPI_Comm comm)
456 MPI_Request request =
457 build_request(buf, count, datatype, src, smpi_comm_rank(comm), tag,
458 comm, NON_PERSISTENT | RECV);
462 MPI_Request smpi_mpi_irecv(void *buf, int count, MPI_Datatype datatype,
463 int src, int tag, MPI_Comm comm)
465 MPI_Request request =
466 build_request(buf, count, datatype, src, smpi_comm_rank(comm), tag,
467 comm, NON_PERSISTENT | RECV);
469 smpi_mpi_start(request);
473 void smpi_mpi_recv(void *buf, int count, MPI_Datatype datatype, int src,
474 int tag, MPI_Comm comm, MPI_Status * status)
477 request = smpi_mpi_irecv(buf, count, datatype, src, tag, comm);
478 smpi_mpi_wait(&request, status);
483 void smpi_mpi_send(void *buf, int count, MPI_Datatype datatype, int dst,
484 int tag, MPI_Comm comm)
487 request = smpi_mpi_isend(buf, count, datatype, dst, tag, comm);
488 smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
492 void smpi_mpi_ssend(void *buf, int count, MPI_Datatype datatype,
493 int dst, int tag, MPI_Comm comm)
495 MPI_Request request = smpi_mpi_issend(buf, count, datatype, dst, tag, comm);
496 smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
499 void smpi_mpi_sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
500 int dst, int sendtag, void *recvbuf, int recvcount,
501 MPI_Datatype recvtype, int src, int recvtag,
502 MPI_Comm comm, MPI_Status * status)
504 MPI_Request requests[2];
508 smpi_isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
510 smpi_irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm);
511 smpi_mpi_startall(2, requests);
512 smpi_mpi_waitall(2, requests, stats);
513 if(status != MPI_STATUS_IGNORE) {
514 // Copy receive status
515 memcpy(status, &stats[1], sizeof(MPI_Status));
519 int smpi_mpi_get_count(MPI_Status * status, MPI_Datatype datatype)
521 return status->count / smpi_datatype_size(datatype);
524 static void finish_wait(MPI_Request * request, MPI_Status * status)
526 MPI_Request req = *request;
527 if(!(req->detached && req->flags & SEND)){
528 if(status != MPI_STATUS_IGNORE) {
529 status->MPI_SOURCE = req->src == MPI_ANY_SOURCE ? req->real_src : req->src;
530 status->MPI_TAG = req->tag == MPI_ANY_TAG ? req->real_tag : req->tag;
532 status->MPI_ERROR = MPI_ERR_TRUNCATE;
533 else status->MPI_ERROR = MPI_SUCCESS ;
534 // this handles the case were size in receive differs from size in send
535 // FIXME: really this should just contain the count of receive-type blocks,
537 status->count = req->real_size;
540 print_request("Finishing", req);
541 MPI_Datatype datatype = req->old_type;
543 if(datatype->has_subtype == 1){
544 // This part handles the problem of non-contignous memory
545 // the unserialization at the reception
546 s_smpi_subtype_t *subtype = datatype->substruct;
547 if(req->flags & RECV) {
548 subtype->unserialize(req->buf, req->old_buf, req->real_size/smpi_datatype_size(datatype) , datatype->substruct);
550 if(req->detached == 0) free(req->buf);
552 smpi_datatype_unuse(datatype);
555 if(req->detached_sender!=NULL){
556 smpi_mpi_request_free(&(req->detached_sender));
559 if(req->flags & NON_PERSISTENT) {
560 smpi_mpi_request_free(request);
566 int smpi_mpi_test(MPI_Request * request, MPI_Status * status) {
569 //assume that request is not MPI_REQUEST_NULL (filtered in PMPI_Test or smpi_mpi_testall before)
570 if ((*request)->action == NULL)
573 flag = simcall_comm_test((*request)->action);
575 (*request)->refcount++;
576 finish_wait(request, status);
578 smpi_empty_status(status);
583 int smpi_mpi_testany(int count, MPI_Request requests[], int *index,
590 *index = MPI_UNDEFINED;
593 comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
594 map = xbt_new(int, count);
596 for(i = 0; i < count; i++) {
597 if((requests[i]!=MPI_REQUEST_NULL) && requests[i]->action) {
598 xbt_dynar_push(comms, &requests[i]->action);
604 i = simcall_comm_testany(comms);
605 // not MPI_UNDEFINED, as this is a simix return code
608 finish_wait(&requests[*index], status);
612 //all requests are null or inactive, return true
614 smpi_empty_status(status);
617 xbt_dynar_free(&comms);
624 int smpi_mpi_testall(int count, MPI_Request requests[],
628 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
631 for(i=0; i<count; i++){
632 if(requests[i]!= MPI_REQUEST_NULL){
633 if (smpi_mpi_test(&requests[i], pstat)!=1){
637 smpi_empty_status(pstat);
639 if(status != MPI_STATUSES_IGNORE) {
640 memcpy(&status[i], pstat, sizeof(*pstat));
646 void smpi_mpi_probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
648 //FIXME find another wait to avoid busy waiting ?
649 // the issue here is that we have to wait on a nonexistent comm
651 smpi_mpi_iprobe(source, tag, comm, &flag, status);
652 XBT_DEBUG("Busy Waiting on probing : %d", flag);
654 simcall_process_sleep(0.0001);
659 void smpi_mpi_iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
660 MPI_Request request =build_request(NULL, 0, MPI_CHAR, source, smpi_comm_rank(comm), tag,
661 comm, NON_PERSISTENT | RECV);
663 // behave like a receive, but don't do it
666 print_request("New iprobe", request);
667 // We have to test both mailboxes as we don't know if we will receive one one or another
668 if (sg_cfg_get_int("smpi/async_small_thres")>0){
669 mailbox = smpi_process_mailbox_small();
670 XBT_DEBUG("trying to probe the perm recv mailbox");
671 request->action = simcall_comm_iprobe(mailbox, request->src, request->tag, &match_recv, (void*)request);
673 if (request->action==NULL){
674 mailbox = smpi_process_mailbox();
675 XBT_DEBUG("trying to probe the other mailbox");
676 request->action = simcall_comm_iprobe(mailbox, request->src, request->tag, &match_recv, (void*)request);
680 MPI_Request req = (MPI_Request)SIMIX_comm_get_src_data(request->action);
682 if(status != MPI_STATUS_IGNORE) {
683 status->MPI_SOURCE = req->src;
684 status->MPI_TAG = req->tag;
685 status->MPI_ERROR = MPI_SUCCESS;
686 status->count = req->real_size;
690 smpi_mpi_request_free(&request);
695 void smpi_mpi_wait(MPI_Request * request, MPI_Status * status)
697 print_request("Waiting", *request);
698 if ((*request)->action != NULL) { // this is not a detached send
699 simcall_comm_wait((*request)->action, -1.0);
701 finish_wait(request, status);
703 // FIXME for a detached send, finish_wait is not called:
706 int smpi_mpi_waitany(int count, MPI_Request requests[],
713 index = MPI_UNDEFINED;
715 // Wait for a request to complete
716 comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
717 map = xbt_new(int, count);
719 XBT_DEBUG("Wait for one of %d", count);
720 for(i = 0; i < count; i++) {
721 if(requests[i] != MPI_REQUEST_NULL) {
722 if (requests[i]->action != NULL) {
723 XBT_DEBUG("Waiting any %p ", requests[i]);
724 xbt_dynar_push(comms, &requests[i]->action);
728 //This is a finished detached request, let's return this one
729 size=0;//so we free the dynar but don't do the waitany call
731 finish_wait(&requests[i], status);//cleanup if refcount = 0
732 requests[i]=MPI_REQUEST_NULL;//set to null
738 i = simcall_comm_waitany(comms);
740 // not MPI_UNDEFINED, as this is a simix return code
743 finish_wait(&requests[index], status);
747 xbt_dynar_free(&comms);
750 if (index==MPI_UNDEFINED)
751 smpi_empty_status(status);
756 int smpi_mpi_waitall(int count, MPI_Request requests[],
761 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
762 int retvalue=MPI_SUCCESS;
763 //tag invalid requests in the set
764 for(c = 0; c < count; c++) {
765 if(requests[c]==MPI_REQUEST_NULL || requests[c]->dst == MPI_PROC_NULL ){
766 if(status != MPI_STATUSES_IGNORE)
767 smpi_empty_status(&status[c]);
768 }else if(requests[c]->src == MPI_PROC_NULL ){
769 if(status != MPI_STATUSES_IGNORE) {
770 smpi_empty_status(&status[c]);
771 status[c].MPI_SOURCE=MPI_PROC_NULL;
775 for(c = 0; c < count; c++) {
777 smpi_mpi_wait(&requests[c], pstat);
780 index = smpi_mpi_waitany(count, requests, pstat);
781 if(index == MPI_UNDEFINED) {
784 if(status != MPI_STATUSES_IGNORE) {
785 memcpy(&status[index], pstat, sizeof(*pstat));
786 if(status[index].MPI_ERROR==MPI_ERR_TRUNCATE)retvalue=MPI_ERR_IN_STATUS;
795 int smpi_mpi_waitsome(int incount, MPI_Request requests[], int *indices,
800 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
803 for(i = 0; i < incount; i++)
805 index=smpi_mpi_waitany(incount, requests, pstat);
806 if(index!=MPI_UNDEFINED){
807 indices[count] = index;
809 if(status != MPI_STATUSES_IGNORE) {
810 memcpy(&status[index], pstat, sizeof(*pstat));
813 return MPI_UNDEFINED;
819 int smpi_mpi_testsome(int incount, MPI_Request requests[], int *indices,
822 int i, count, count_dead;
824 MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
828 for(i = 0; i < incount; i++) {
829 if((requests[i] != MPI_REQUEST_NULL)) {
830 if(smpi_mpi_test(&requests[i], pstat)) {
833 if(status != MPI_STATUSES_IGNORE) {
834 memcpy(&status[i], pstat, sizeof(*pstat));
841 if(count_dead==incount)return MPI_UNDEFINED;
845 void smpi_mpi_bcast(void *buf, int count, MPI_Datatype datatype, int root,
848 // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI))
849 nary_tree_bcast(buf, count, datatype, root, comm, 4);
852 void smpi_mpi_barrier(MPI_Comm comm)
854 // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI))
855 nary_tree_barrier(comm, 4);
858 void smpi_mpi_gather(void *sendbuf, int sendcount, MPI_Datatype sendtype,
859 void *recvbuf, int recvcount, MPI_Datatype recvtype,
860 int root, MPI_Comm comm)
862 int system_tag = 666;
863 int rank, size, src, index;
864 MPI_Aint lb = 0, recvext = 0;
865 MPI_Request *requests;
867 rank = smpi_comm_rank(comm);
868 size = smpi_comm_size(comm);
870 // Send buffer to root
871 smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
873 // FIXME: check for errors
874 smpi_datatype_extent(recvtype, &lb, &recvext);
875 // Local copy from root
876 smpi_datatype_copy(sendbuf, sendcount, sendtype,
877 (char *)recvbuf + root * recvcount * recvext, recvcount, recvtype);
878 // Receive buffers from senders
879 requests = xbt_new(MPI_Request, size - 1);
881 for(src = 0; src < size; src++) {
883 requests[index] = smpi_irecv_init((char *)recvbuf + src * recvcount * recvext,
885 src, system_tag, comm);
889 // Wait for completion of irecv's.
890 smpi_mpi_startall(size - 1, requests);
891 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
896 void smpi_mpi_gatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
897 void *recvbuf, int *recvcounts, int *displs,
898 MPI_Datatype recvtype, int root, MPI_Comm comm)
900 int system_tag = 666;
901 int rank, size, src, index;
902 MPI_Aint lb = 0, recvext = 0;
903 MPI_Request *requests;
905 rank = smpi_comm_rank(comm);
906 size = smpi_comm_size(comm);
908 // Send buffer to root
909 smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
911 // FIXME: check for errors
912 smpi_datatype_extent(recvtype, &lb, &recvext);
913 // Local copy from root
914 smpi_datatype_copy(sendbuf, sendcount, sendtype,
915 (char *)recvbuf + displs[root] * recvext,
916 recvcounts[root], recvtype);
917 // Receive buffers from senders
918 requests = xbt_new(MPI_Request, size - 1);
920 for(src = 0; src < size; src++) {
923 smpi_irecv_init((char *)recvbuf + displs[src] * recvext,
924 recvcounts[src], recvtype, src, system_tag, comm);
928 // Wait for completion of irecv's.
929 smpi_mpi_startall(size - 1, requests);
930 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
935 void smpi_mpi_allgather(void *sendbuf, int sendcount,
936 MPI_Datatype sendtype, void *recvbuf,
937 int recvcount, MPI_Datatype recvtype,
940 int system_tag = 666;
941 int rank, size, other, index;
942 MPI_Aint lb = 0, recvext = 0;
943 MPI_Request *requests;
945 rank = smpi_comm_rank(comm);
946 size = smpi_comm_size(comm);
947 // FIXME: check for errors
948 smpi_datatype_extent(recvtype, &lb, &recvext);
949 // Local copy from self
950 smpi_datatype_copy(sendbuf, sendcount, sendtype,
951 (char *)recvbuf + rank * recvcount * recvext, recvcount,
953 // Send/Recv buffers to/from others;
954 requests = xbt_new(MPI_Request, 2 * (size - 1));
956 for(other = 0; other < size; other++) {
959 smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag,
962 requests[index] = smpi_irecv_init((char *)recvbuf + other * recvcount * recvext,
963 recvcount, recvtype, other,
968 // Wait for completion of all comms.
969 smpi_mpi_startall(2 * (size - 1), requests);
970 smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
974 void smpi_mpi_allgatherv(void *sendbuf, int sendcount,
975 MPI_Datatype sendtype, void *recvbuf,
976 int *recvcounts, int *displs,
977 MPI_Datatype recvtype, MPI_Comm comm)
979 int system_tag = 666;
980 int rank, size, other, index;
981 MPI_Aint lb = 0, recvext = 0;
982 MPI_Request *requests;
984 rank = smpi_comm_rank(comm);
985 size = smpi_comm_size(comm);
986 // FIXME: check for errors
987 smpi_datatype_extent(recvtype, &lb, &recvext);
988 // Local copy from self
989 smpi_datatype_copy(sendbuf, sendcount, sendtype,
990 (char *)recvbuf + displs[rank] * recvext,
991 recvcounts[rank], recvtype);
992 // Send buffers to others;
993 requests = xbt_new(MPI_Request, 2 * (size - 1));
995 for(other = 0; other < size; other++) {
998 smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag,
1002 smpi_irecv_init((char *)recvbuf + displs[other] * recvext, recvcounts[other],
1003 recvtype, other, system_tag, comm);
1007 // Wait for completion of all comms.
1008 smpi_mpi_startall(2 * (size - 1), requests);
1009 smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
1013 void smpi_mpi_scatter(void *sendbuf, int sendcount, MPI_Datatype sendtype,
1014 void *recvbuf, int recvcount, MPI_Datatype recvtype,
1015 int root, MPI_Comm comm)
1017 int system_tag = 666;
1018 int rank, size, dst, index;
1019 MPI_Aint lb = 0, sendext = 0;
1020 MPI_Request *requests;
1022 rank = smpi_comm_rank(comm);
1023 size = smpi_comm_size(comm);
1025 // Recv buffer from root
1026 smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm,
1029 // FIXME: check for errors
1030 smpi_datatype_extent(sendtype, &lb, &sendext);
1031 // Local copy from root
1032 smpi_datatype_copy((char *)sendbuf + root * sendcount * sendext,
1033 sendcount, sendtype, recvbuf, recvcount, recvtype);
1034 // Send buffers to receivers
1035 requests = xbt_new(MPI_Request, size - 1);
1037 for(dst = 0; dst < size; dst++) {
1039 requests[index] = smpi_isend_init((char *)sendbuf + dst * sendcount * sendext,
1040 sendcount, sendtype, dst,
1045 // Wait for completion of isend's.
1046 smpi_mpi_startall(size - 1, requests);
1047 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
1052 void smpi_mpi_scatterv(void *sendbuf, int *sendcounts, int *displs,
1053 MPI_Datatype sendtype, void *recvbuf, int recvcount,
1054 MPI_Datatype recvtype, int root, MPI_Comm comm)
1056 int system_tag = 666;
1057 int rank, size, dst, index;
1058 MPI_Aint lb = 0, sendext = 0;
1059 MPI_Request *requests;
1061 rank = smpi_comm_rank(comm);
1062 size = smpi_comm_size(comm);
1064 // Recv buffer from root
1065 smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm,
1068 // FIXME: check for errors
1069 smpi_datatype_extent(sendtype, &lb, &sendext);
1070 // Local copy from root
1071 smpi_datatype_copy((char *)sendbuf + displs[root] * sendext, sendcounts[root],
1072 sendtype, recvbuf, recvcount, recvtype);
1073 // Send buffers to receivers
1074 requests = xbt_new(MPI_Request, size - 1);
1076 for(dst = 0; dst < size; dst++) {
1079 smpi_isend_init((char *)sendbuf + displs[dst] * sendext, sendcounts[dst],
1080 sendtype, dst, system_tag, comm);
1084 // Wait for completion of isend's.
1085 smpi_mpi_startall(size - 1, requests);
1086 smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
1091 void smpi_mpi_reduce(void *sendbuf, void *recvbuf, int count,
1092 MPI_Datatype datatype, MPI_Op op, int root,
1095 int system_tag = 666;
1096 int rank, size, src, index;
1097 MPI_Aint lb = 0, dataext = 0;
1098 MPI_Request *requests;
1101 rank = smpi_comm_rank(comm);
1102 size = smpi_comm_size(comm);
1104 // Send buffer to root
1105 smpi_mpi_send(sendbuf, count, datatype, root, system_tag, comm);
1107 // FIXME: check for errors
1108 smpi_datatype_extent(datatype, &lb, &dataext);
1109 // Local copy from root
1110 if (sendbuf && recvbuf)
1111 smpi_datatype_copy(sendbuf, count, datatype, recvbuf, count, datatype);
1112 // Receive buffers from senders
1113 //TODO: make a MPI_barrier here ?
1114 requests = xbt_new(MPI_Request, size - 1);
1115 tmpbufs = xbt_new(void *, size - 1);
1117 for(src = 0; src < size; src++) {
1119 // FIXME: possibly overkill we we have contiguous/noncontiguous data
1121 tmpbufs[index] = xbt_malloc(count * dataext);
1123 smpi_irecv_init(tmpbufs[index], count, datatype, src,
1128 // Wait for completion of irecv's.
1129 smpi_mpi_startall(size - 1, requests);
1130 for(src = 0; src < size - 1; src++) {
1131 index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
1132 XBT_DEBUG("finished waiting any request with index %d", index);
1133 if(index == MPI_UNDEFINED) {
1136 if(op) /* op can be MPI_OP_NULL that does nothing */
1137 smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
1139 for(index = 0; index < size - 1; index++) {
1140 xbt_free(tmpbufs[index]);
1147 void smpi_mpi_allreduce(void *sendbuf, void *recvbuf, int count,
1148 MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
1150 smpi_mpi_reduce(sendbuf, recvbuf, count, datatype, op, 0, comm);
1151 smpi_mpi_bcast(recvbuf, count, datatype, 0, comm);
1154 void smpi_mpi_scan(void *sendbuf, void *recvbuf, int count,
1155 MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
1157 int system_tag = 666;
1158 int rank, size, other, index;
1159 MPI_Aint lb = 0, dataext = 0;
1160 MPI_Request *requests;
1163 rank = smpi_comm_rank(comm);
1164 size = smpi_comm_size(comm);
1166 // FIXME: check for errors
1167 smpi_datatype_extent(datatype, &lb, &dataext);
1169 // Local copy from self
1170 smpi_datatype_copy(sendbuf, count, datatype, recvbuf, count, datatype);
1172 // Send/Recv buffers to/from others;
1173 requests = xbt_new(MPI_Request, size - 1);
1174 tmpbufs = xbt_new(void *, rank);
1176 for(other = 0; other < rank; other++) {
1177 // FIXME: possibly overkill we we have contiguous/noncontiguous data
1179 tmpbufs[index] = xbt_malloc(count * dataext);
1181 smpi_irecv_init(tmpbufs[index], count, datatype, other, system_tag,
1185 for(other = rank + 1; other < size; other++) {
1187 smpi_isend_init(sendbuf, count, datatype, other, system_tag, comm);
1190 // Wait for completion of all comms.
1191 smpi_mpi_startall(size - 1, requests);
1192 for(other = 0; other < size - 1; other++) {
1193 index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
1194 if(index == MPI_UNDEFINED) {
1198 // #Request is below rank: it's a irecv
1199 smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
1202 for(index = 0; index < rank; index++) {
1203 xbt_free(tmpbufs[index]);