mpi: remove functionnality starpu_mpi_irecv_probe_detached

ChangeLog

@@ -65,8 +65,6 @@ New features:
         - When exchanging user-defined data interfaces, the size of
 	  the data is the size returned by the pack operation, i.e
 	  data with dynamic size can now be exchanged with StarPU-MPI.
-        - New functionality starpu_mpi_irecv_probe_detached which
-  	  first tests if the message is available before calling MPI_Recv.
   * Add experimental simgrid support, to simulate execution with various
     number of CPUs, GPUs, amount of memory, etc.
   * Add support for OpenCL simulators (which provide simulated execution time)

mpi/include/starpu_mpi.h

@@ -1,7 +1,7 @@
 /* StarPU --- Runtime system for heterogeneous multicore architectures.
  *
  * Copyright (C) 2009-2012  Université de Bordeaux 1
- * Copyright (C) 2010, 2011, 2012  Centre National de la Recherche Scientifique
+ * Copyright (C) 2010, 2011, 2012, 2013  Centre National de la Recherche Scientifique
  *
  * StarPU is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -36,7 +36,6 @@ int starpu_mpi_send(starpu_data_handle_t data_handle, int dest, int mpi_tag, MPI
 int starpu_mpi_recv(starpu_data_handle_t data_handle, int source, int mpi_tag, MPI_Comm comm, MPI_Status *status);
 int starpu_mpi_isend_detached(starpu_data_handle_t data_handle, int dest, int mpi_tag, MPI_Comm comm, void (*callback)(void *), void *arg);
 int starpu_mpi_irecv_detached(starpu_data_handle_t data_handle, int source, int mpi_tag, MPI_Comm comm, void (*callback)(void *), void *arg);
-int starpu_mpi_irecv_probe_detached(starpu_data_handle_t data_handle, int source, int mpi_tag, MPI_Comm comm, void (*callback)(void *), void *arg);
 int starpu_mpi_wait(starpu_mpi_req *req, MPI_Status *status);
 int starpu_mpi_test(starpu_mpi_req *req, int *flag, MPI_Status *status);
 int starpu_mpi_barrier(MPI_Comm comm);

mpi/src/starpu_mpi.c

@@ -343,39 +343,6 @@ int starpu_mpi_recv(starpu_data_handle_t data_handle, int source, int mpi_tag, M
 	return 0;
 }
 
-static void _starpu_mpi_probe_func(struct _starpu_mpi_req *req)
-{
-	_STARPU_MPI_LOG_IN();
-
-	_starpu_mpi_handle_allocate_datatype(req->data_handle, &req->datatype, &req->user_datatype);
-#ifdef STARPU_DEVEL
-#warning TODO: release that assert
-#endif
-	assert(req->user_datatype == 0);
-	req->count = 1;
-	req->ptr = starpu_handle_get_local_ptr(req->data_handle);
-
-	_STARPU_MPI_DEBUG(2, "MPI probe request %p type %s tag %d src %d data %p ptr %p datatype '%s' count %d user_datatype %d \n", req, _starpu_mpi_request_type(req->request_type), req->mpi_tag, req->srcdst, req->data_handle, req->ptr, _starpu_mpi_datatype(req->datatype), (int)req->count, req->user_datatype);
-
-	/* somebody is perhaps waiting for the MPI request to be posted */
-	_STARPU_PTHREAD_MUTEX_LOCK(&req->req_mutex);
-	req->submitted = 1;
-	_STARPU_PTHREAD_COND_BROADCAST(&req->req_cond);
-	_STARPU_PTHREAD_MUTEX_UNLOCK(&req->req_mutex);
-
-	_starpu_mpi_handle_detached_request(req);
-
-	_STARPU_MPI_LOG_OUT();
-}
-
-int starpu_mpi_irecv_probe_detached(starpu_data_handle_t data_handle, int source, int mpi_tag, MPI_Comm comm, void (*callback)(void *), void *arg)
-{
-	_STARPU_MPI_LOG_IN();
-	_starpu_mpi_isend_irecv_common(data_handle, source, mpi_tag, comm, 1, callback, arg, PROBE_REQ, _starpu_mpi_probe_func, STARPU_W);
-	_STARPU_MPI_LOG_OUT();
-	return 0;
-}
-
 /********************************************************/
 /*                                                      */
 /*  Wait functionalities                                */
@@ -627,7 +594,6 @@ static char *_starpu_mpi_request_type(enum _starpu_mpi_request_type request_type
 		case WAIT_REQ: return "WAIT_REQ";
 		case TEST_REQ: return "TEST_REQ";
 		case BARRIER_REQ: return "BARRIER_REQ";
-		case PROBE_REQ: return "PROBE_REQ";
 		default: return "unknown request type";
 		}
 }
@@ -641,18 +607,8 @@ static void _starpu_mpi_handle_request_termination(struct _starpu_mpi_req *req)
 
 	_STARPU_MPI_DEBUG(2, "complete MPI request %p type %s tag %d src %d data %p ptr %p datatype '%s' count %d user_datatype %d \n",
 			  req, _starpu_mpi_request_type(req->request_type), req->mpi_tag, req->srcdst, req->data_handle, req->ptr, _starpu_mpi_datatype(req->datatype), (int)req->count, req->user_datatype);
-	if (req->request_type == PROBE_REQ)
-	{
-#ifdef STARPU_DEVEL
-#warning TODO: instead of calling MPI_Recv, we should post a starpu mpi recv request
-#endif
-		MPI_Status status;
-		memset(&status, 0, sizeof(MPI_Status));
-		req->ret = MPI_Recv(req->ptr, req->count, req->datatype, req->srcdst, req->mpi_tag, req->comm, &status);
-		STARPU_ASSERT_MSG(req->ret == MPI_SUCCESS, "MPI_Recv returning %d", req->ret);
-	}
 
-	if (req->request_type == RECV_REQ || req->request_type == SEND_REQ || req->request_type == PROBE_REQ)
+	if (req->request_type == RECV_REQ || req->request_type == SEND_REQ)
 	{
 		if (req->user_datatype == 1)
 		{
@@ -743,20 +699,12 @@ static void _starpu_mpi_test_detached_requests(void)
 		_STARPU_PTHREAD_MUTEX_UNLOCK(&detached_requests_mutex);
 
 		//_STARPU_MPI_DEBUG(3, "Test detached request %p - mpitag %d - TYPE %s %d\n", &req->request, req->mpi_tag, _starpu_mpi_request_type(req->request_type), req->srcdst);
-		if (req->request_type == PROBE_REQ)
-		{
-			req->ret = MPI_Iprobe(req->srcdst, req->mpi_tag, req->comm, &flag, &status);
-		}
-		else
-		{
-			req->ret = MPI_Test(&req->request, &flag, &status);
-		}
-
-		STARPU_ASSERT_MSG(req->ret == MPI_SUCCESS, "MPI_Iprobe or MPI_Test returning %d", req->ret);
+		req->ret = MPI_Test(&req->request, &flag, &status);
+		STARPU_ASSERT_MSG(req->ret == MPI_SUCCESS, "MPI_Test returning %d", req->ret);
 
 		if (flag)
 		{
-			if (req->request_type == RECV_REQ || req->request_type == PROBE_REQ)
+			if (req->request_type == RECV_REQ)
 			{
 				TRACE_MPI_IRECV_COMPLETE_BEGIN(req->srcdst, req->mpi_tag);
 			}
@@ -767,7 +715,7 @@ static void _starpu_mpi_test_detached_requests(void)
 
 			_starpu_mpi_handle_request_termination(req);
 
-			if (req->request_type == RECV_REQ || req->request_type == PROBE_REQ)
+			if (req->request_type == RECV_REQ)
 			{
 				TRACE_MPI_IRECV_COMPLETE_END(req->srcdst, req->mpi_tag);
 			}

mpi/tests/Makefile.am

@@ -83,7 +83,6 @@ starpu_mpi_TESTS =				\
 	mpi_irecv				\
 	mpi_isend_detached			\
 	mpi_irecv_detached			\
-	mpi_probe				\
 	mpi_detached_tag			\
 	ring					\
 	ring_async				\
@@ -108,7 +107,6 @@ noinst_PROGRAMS =				\
 	mpi_irecv				\
 	mpi_isend_detached			\
 	mpi_irecv_detached			\
-	mpi_probe				\
 	mpi_detached_tag			\
 	ring					\
 	ring_async				\
@@ -134,8 +132,6 @@ mpi_isend_detached_LDADD =			\
 	../src/libstarpumpi-@STARPU_EFFECTIVE_VERSION@.la
 mpi_irecv_detached_LDADD =			\
 	../src/libstarpumpi-@STARPU_EFFECTIVE_VERSION@.la
-mpi_probe_LDADD =			\
-	../src/libstarpumpi-@STARPU_EFFECTIVE_VERSION@.la
 mpi_detached_tag_LDADD =				\
 	../src/libstarpumpi-@STARPU_EFFECTIVE_VERSION@.la
 pingpong_LDADD =					\

mpi/tests/mpi_probe.c

@@ -1,102 +0,0 @@
-/* StarPU --- Runtime system for heterogeneous multicore architectures.
- *
- * Copyright (C) 2010, 2012  Université de Bordeaux 1
- * Copyright (C) 2010, 2011, 2012, 2013  Centre National de la Recherche Scientifique
- *
- * StarPU is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- *
- * StarPU is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * See the GNU Lesser General Public License in COPYING.LGPL for more details.
- */
-
-#include <starpu_mpi.h>
-#include <common/thread.h>
-#include "helper.h"
-
-#ifdef STARPU_QUICK_CHECK
-#  define NITER	16
-#else
-#  define NITER	2048
-#endif
-#define SIZE	16
-
-float *tab;
-starpu_data_handle_t tab_handle;
-
-static starpu_pthread_mutex_t mutex = STARPU_PTHREAD_MUTEX_INITIALIZER;
-static starpu_pthread_cond_t cond = STARPU_PTHREAD_COND_INITIALIZER;
-
-void callback(void *arg __attribute__((unused)))
-{
-	unsigned *received = arg;
-
-	_STARPU_PTHREAD_MUTEX_LOCK(&mutex);
-	*received = 1;
-	_STARPU_PTHREAD_COND_SIGNAL(&cond);
-	_STARPU_PTHREAD_MUTEX_UNLOCK(&mutex);
-}
-
-
-int main(int argc, char **argv)
-{
-	int ret, rank, size;
-
-	MPI_Init(NULL, NULL);
-	MPI_Comm_rank(MPI_COMM_WORLD, &rank);
-	MPI_Comm_size(MPI_COMM_WORLD, &size);
-
-	if (size%2 != 0)
-	{
-		if (rank == 0)
-			FPRINTF(stderr, "We need a even number of processes.\n");
-
-		MPI_Finalize();
-		return STARPU_TEST_SKIPPED;
-	}
-
-	ret = starpu_init(NULL);
-	STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
-	ret = starpu_mpi_init(NULL, NULL, 0);
-	STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_init");
-
-	tab = malloc(SIZE*sizeof(float));
-	starpu_vector_data_register(&tab_handle, 0, (uintptr_t)tab, SIZE, sizeof(float));
-
-	int nloops = NITER;
-	int loop;
-	int other_rank = rank%2 == 0 ? rank+1 : rank-1;
-
-	for (loop = 0; loop < nloops; loop++)
-	{
-		if ((loop % 2) == (rank%2))
-		{
-			starpu_mpi_send(tab_handle, other_rank, loop, MPI_COMM_WORLD);
-		}
-		else
-		{
-			int received = 0;
-			starpu_mpi_irecv_probe_detached(tab_handle, other_rank, loop, MPI_COMM_WORLD, callback, &received);
-
-			_STARPU_PTHREAD_MUTEX_LOCK(&mutex);
-			while (!received)
-				_STARPU_PTHREAD_COND_WAIT(&cond, &mutex);
-			_STARPU_PTHREAD_MUTEX_UNLOCK(&mutex);
-		}
-	}
-
-	starpu_data_unregister(tab_handle);
-	free(tab);
-
-	starpu_mpi_shutdown();
-	starpu_shutdown();
-
-	MPI_Finalize();
-
-	return 0;
-}