ports/openmpi
ports/openmpi
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030a5f2054
openmpi/ompi/mca/pml/ob1/pml_ob1_recvreq.c
Nathan Hjelm 6611c000c9 Fix coverity warnings 
Fix CID 1315271: Constant expression result

The intent of this conditional is to not produce a peruse event for
probe or mprobe requests. Coverity is correct that the expression is
always true. Changed the || to && to fix. Also moved the conditional
within an OMPI_WANT_PERUSE to ensure the conditional is not evaluated
if peruse is disabled.

Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
2015-09-28 15:35:25 -06:00

1282 строки
51 KiB
C
Исходник Ответственный История

/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2013 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008 UT-Battelle, LLC. All rights reserved.
* Copyright (c) 2011 Sandia National Laboratories. All rights reserved.
* Copyright (c) 2012-2015 NVIDIA Corporation. All rights reserved.
* Copyright (c) 2011-2015 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2012 FUJITSU LIMITED. All rights reserved.
* Copyright (c) 2014-2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "opal/mca/mpool/mpool.h"
#include "opal/util/arch.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/mca/bml/bml.h"
#include "pml_ob1_comm.h"
#include "pml_ob1_recvreq.h"
#include "pml_ob1_recvfrag.h"
#include "pml_ob1_sendreq.h"
#include "pml_ob1_rdmafrag.h"
#include "ompi/mca/bml/base/base.h"
#include "ompi/memchecker.h"
#if OPAL_CUDA_SUPPORT
#include "opal/datatype/opal_datatype_cuda.h"
#include "opal/mca/common/cuda/common_cuda.h"
#endif /* OPAL_CUDA_SUPPORT */
#if OPAL_CUDA_SUPPORT
int mca_pml_ob1_cuda_need_buffers(mca_pml_ob1_recv_request_t* recvreq,
mca_btl_base_module_t* btl);
#endif /* OPAL_CUDA_SUPPORT */
void mca_pml_ob1_recv_request_process_pending(void)
{
mca_pml_ob1_recv_request_t* recvreq;
int rc, i, s = (int)opal_list_get_size(&mca_pml_ob1.recv_pending);
for(i = 0; i < s; i++) {
OPAL_THREAD_LOCK(&mca_pml_ob1.lock);
recvreq = (mca_pml_ob1_recv_request_t*)
opal_list_remove_first(&mca_pml_ob1.recv_pending);
OPAL_THREAD_UNLOCK(&mca_pml_ob1.lock);
if( OPAL_UNLIKELY(NULL == recvreq) )
break;
recvreq->req_pending = false;
rc = mca_pml_ob1_recv_request_schedule_exclusive(recvreq, NULL);
if(OMPI_ERR_OUT_OF_RESOURCE == rc)
break;
}
}
static int mca_pml_ob1_recv_request_free(struct ompi_request_t** request)
{
mca_pml_ob1_recv_request_t* recvreq = *(mca_pml_ob1_recv_request_t**)request;
assert( false == recvreq->req_recv.req_base.req_free_called );
OPAL_THREAD_LOCK(&ompi_request_lock);
recvreq->req_recv.req_base.req_free_called = true;
PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_NOTIFY,
&(recvreq->req_recv.req_base), PERUSE_RECV );
if( true == recvreq->req_recv.req_base.req_pml_complete ) {
/* make buffer defined when the request is compeleted,
and before releasing the objects. */
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_defined,
recvreq->req_recv.req_base.req_addr,
recvreq->req_recv.req_base.req_count,
recvreq->req_recv.req_base.req_datatype);
);
MCA_PML_OB1_RECV_REQUEST_RETURN( recvreq );
}
OPAL_THREAD_UNLOCK(&ompi_request_lock);
*request = MPI_REQUEST_NULL;
return OMPI_SUCCESS;
}
static int mca_pml_ob1_recv_request_cancel(struct ompi_request_t* ompi_request, int complete)
{
mca_pml_ob1_recv_request_t* request = (mca_pml_ob1_recv_request_t*)ompi_request;
ompi_communicator_t *comm = request->req_recv.req_base.req_comm;
mca_pml_ob1_comm_t *ob1_comm = comm->c_pml_comm;
if( true == request->req_match_received ) { /* way to late to cancel this one */
assert( OMPI_ANY_TAG != ompi_request->req_status.MPI_TAG ); /* not matched isn't it */
return OMPI_SUCCESS;
}
/* The rest should be protected behind the match logic lock */
OPAL_THREAD_LOCK(&ob1_comm->matching_lock);
if( request->req_recv.req_base.req_peer == OMPI_ANY_SOURCE ) {
opal_list_remove_item( &ob1_comm->wild_receives, (opal_list_item_t*)request );
} else {
mca_pml_ob1_comm_proc_t* proc = mca_pml_ob1_peer_lookup (comm, request->req_recv.req_base.req_peer);
opal_list_remove_item(&proc->specific_receives, (opal_list_item_t*)request);
}
PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_REMOVE_FROM_POSTED_Q,
&(request->req_recv.req_base), PERUSE_RECV );
/**
* As now the PML is done with this request we have to force the pml_complete
* to true. Otherwise, the request will never be freed.
*/
request->req_recv.req_base.req_pml_complete = true;
OPAL_THREAD_UNLOCK(&ob1_comm->matching_lock);
OPAL_THREAD_LOCK(&ompi_request_lock);
ompi_request->req_status._cancelled = true;
/* This macro will set the req_complete to true so the MPI Test/Wait* functions
* on this request will be able to complete. As the status is marked as
* cancelled the cancel state will be detected.
*/
MCA_PML_OB1_RECV_REQUEST_MPI_COMPLETE(request);
OPAL_THREAD_UNLOCK(&ompi_request_lock);
/*
* Receive request cancelled, make user buffer accessible.
*/
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_defined,
request->req_recv.req_base.req_addr,
request->req_recv.req_base.req_count,
request->req_recv.req_base.req_datatype);
);
return OMPI_SUCCESS;
}
static void mca_pml_ob1_recv_request_construct(mca_pml_ob1_recv_request_t* request)
{
/* the request type is set by the superclass */
request->req_recv.req_base.req_ompi.req_free = mca_pml_ob1_recv_request_free;
request->req_recv.req_base.req_ompi.req_cancel = mca_pml_ob1_recv_request_cancel;
request->req_rdma_cnt = 0;
request->local_handle = NULL;
OBJ_CONSTRUCT(&request->lock, opal_mutex_t);
}
static void mca_pml_ob1_recv_request_destruct(mca_pml_ob1_recv_request_t* request)
{
OBJ_DESTRUCT(&request->lock);
if (OPAL_UNLIKELY(request->local_handle)) {
mca_bml_base_deregister_mem (request->rdma_bml, request->local_handle);
request->local_handle = NULL;
}
}
OBJ_CLASS_INSTANCE(
mca_pml_ob1_recv_request_t,
mca_pml_base_recv_request_t,
mca_pml_ob1_recv_request_construct,
mca_pml_ob1_recv_request_destruct);
/*
* Release resources.
*/
static void mca_pml_ob1_recv_ctl_completion( mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* ep,
struct mca_btl_base_descriptor_t* des,
int status )
{
mca_bml_base_btl_t* bml_btl = (mca_bml_base_btl_t*)des->des_context;
MCA_PML_OB1_PROGRESS_PENDING(bml_btl);
}
/*
* Put operation has completed remotely - update request status
*/
static void mca_pml_ob1_put_completion (mca_pml_ob1_rdma_frag_t *frag, int64_t rdma_size)
{
mca_pml_ob1_recv_request_t* recvreq = (mca_pml_ob1_recv_request_t *) frag->rdma_req;
mca_bml_base_btl_t *bml_btl = frag->rdma_bml;
OPAL_THREAD_ADD_SIZE_T(&recvreq->req_pipeline_depth,-1);
MCA_PML_OB1_RDMA_FRAG_RETURN(frag);
if (OPAL_LIKELY(0 < rdma_size)) {
assert ((uint64_t) rdma_size == frag->rdma_length);
/* check completion status */
OPAL_THREAD_ADD_SIZE_T(&recvreq->req_bytes_received, (size_t) rdma_size);
if (recv_request_pml_complete_check(recvreq) == false &&
recvreq->req_rdma_offset < recvreq->req_send_offset) {
/* schedule additional rdma operations */
mca_pml_ob1_recv_request_schedule(recvreq, bml_btl);
}
}
MCA_PML_OB1_PROGRESS_PENDING(bml_btl);
}
/*
*
*/
int mca_pml_ob1_recv_request_ack_send_btl(
ompi_proc_t* proc, mca_bml_base_btl_t* bml_btl,
uint64_t hdr_src_req, void *hdr_dst_req, uint64_t hdr_send_offset,
uint64_t size, bool nordma)
{
mca_btl_base_descriptor_t* des;
mca_pml_ob1_ack_hdr_t* ack;
int rc;
/* allocate descriptor */
mca_bml_base_alloc(bml_btl, &des, MCA_BTL_NO_ORDER,
sizeof(mca_pml_ob1_ack_hdr_t),
MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP |
MCA_BTL_DES_SEND_ALWAYS_CALLBACK | MCA_BTL_DES_FLAGS_SIGNAL);
if( OPAL_UNLIKELY(NULL == des) ) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
/* fill out header */
ack = (mca_pml_ob1_ack_hdr_t*)des->des_segments->seg_addr.pval;
mca_pml_ob1_ack_hdr_prepare (ack, nordma ? MCA_PML_OB1_HDR_FLAGS_NORDMA : 0,
hdr_src_req, hdr_dst_req, hdr_send_offset, size);
ob1_hdr_hton(ack, MCA_PML_OB1_HDR_TYPE_ACK, proc);
/* initialize descriptor */
des->des_cbfunc = mca_pml_ob1_recv_ctl_completion;
rc = mca_bml_base_send(bml_btl, des, MCA_PML_OB1_HDR_TYPE_ACK);
if( OPAL_LIKELY( rc >= 0 ) ) {
return OMPI_SUCCESS;
}
mca_bml_base_free(bml_btl, des);
return OMPI_ERR_OUT_OF_RESOURCE;
}
static int mca_pml_ob1_recv_request_ack(
mca_pml_ob1_recv_request_t* recvreq,
mca_pml_ob1_rendezvous_hdr_t* hdr,
size_t bytes_received)
{
ompi_proc_t* proc = (ompi_proc_t*)recvreq->req_recv.req_base.req_proc;
mca_bml_base_endpoint_t* bml_endpoint = NULL;
bml_endpoint = mca_bml_base_get_endpoint (proc);
/* by default copy everything */
recvreq->req_send_offset = bytes_received;
if(hdr->hdr_msg_length > bytes_received) {
size_t rdma_num = mca_bml_base_btl_array_get_size(&bml_endpoint->btl_rdma);
/*
* lookup request buffer to determine if memory is already
* registered.
*/
if(opal_convertor_need_buffers(&recvreq->req_recv.req_base.req_convertor) == 0 &&
hdr->hdr_match.hdr_common.hdr_flags & MCA_PML_OB1_HDR_FLAGS_CONTIG &&
rdma_num != 0) {
unsigned char *base;
opal_convertor_get_current_pointer( &recvreq->req_recv.req_base.req_convertor, (void**)&(base) );
if(hdr->hdr_match.hdr_common.hdr_flags & MCA_PML_OB1_HDR_FLAGS_PIN)
recvreq->req_rdma_cnt = mca_pml_ob1_rdma_btls(bml_endpoint,
base, recvreq->req_recv.req_bytes_packed,
recvreq->req_rdma );
else
recvreq->req_rdma_cnt = 0;
/* memory is already registered on both sides */
if (recvreq->req_rdma_cnt != 0) {
recvreq->req_send_offset = hdr->hdr_msg_length;
/* are rdma devices available for long rdma protocol */
} else if(bml_endpoint->btl_send_limit < hdr->hdr_msg_length) {
/* use convertor to figure out the rdma offset for this request */
recvreq->req_send_offset = hdr->hdr_msg_length -
bml_endpoint->btl_pipeline_send_length;
if(recvreq->req_send_offset < bytes_received)
recvreq->req_send_offset = bytes_received;
/* use converter to figure out the rdma offset for this
* request */
opal_convertor_set_position(&recvreq->req_recv.req_base.req_convertor,
&recvreq->req_send_offset);
recvreq->req_rdma_cnt =
mca_pml_ob1_rdma_pipeline_btls(bml_endpoint,
recvreq->req_send_offset - bytes_received,
recvreq->req_rdma);
}
}
/* nothing to send by copy in/out - no need to ack */
if(recvreq->req_send_offset == hdr->hdr_msg_length)
return OMPI_SUCCESS;
}
/* let know to shedule function there is no need to put ACK flag */
recvreq->req_ack_sent = true;
return mca_pml_ob1_recv_request_ack_send(proc, hdr->hdr_src_req.lval,
recvreq, recvreq->req_send_offset, 0,
recvreq->req_send_offset == bytes_received);
}
static int mca_pml_ob1_recv_request_put_frag (mca_pml_ob1_rdma_frag_t *frag);
static int mca_pml_ob1_recv_request_get_frag_failed (mca_pml_ob1_rdma_frag_t *frag, int rc)
{
mca_pml_ob1_recv_request_t *recvreq = (mca_pml_ob1_recv_request_t *) frag->rdma_req;
ompi_proc_t *proc = (ompi_proc_t *) recvreq->req_recv.req_base.req_proc;
if (OMPI_ERR_NOT_AVAILABLE == rc) {
/* get isn't supported for this transfer. tell peer to fallback on put */
rc = mca_pml_ob1_recv_request_put_frag (frag);
if (OMPI_ERR_OUT_OF_RESOURCE == rc) {
OPAL_THREAD_LOCK(&mca_pml_ob1.lock);
opal_list_append (&mca_pml_ob1.rdma_pending, (opal_list_item_t*)frag);
OPAL_THREAD_UNLOCK(&mca_pml_ob1.lock);
return OMPI_SUCCESS;
}
}
if (++frag->retries < mca_pml_ob1.rdma_retries_limit &&
OMPI_ERR_OUT_OF_RESOURCE == rc) {
OPAL_THREAD_LOCK(&mca_pml_ob1.lock);
opal_list_append(&mca_pml_ob1.rdma_pending, (opal_list_item_t*)frag);
OPAL_THREAD_UNLOCK(&mca_pml_ob1.lock);
return OMPI_SUCCESS;
}
/* tell peer to fall back on send for this region */
rc = mca_pml_ob1_recv_request_ack_send(proc, frag->rdma_hdr.hdr_rget.hdr_rndv.hdr_src_req.lval,
recvreq, frag->rdma_offset, frag->rdma_length, false);
MCA_PML_OB1_RDMA_FRAG_RETURN(frag);
return rc;
}
/**
* Return resources used by the RDMA
*/
static void mca_pml_ob1_rget_completion (mca_btl_base_module_t* btl, struct mca_btl_base_endpoint_t* ep,
void *local_address, mca_btl_base_registration_handle_t *local_handle,
void *context, void *cbdata, int status)
{
mca_bml_base_btl_t *bml_btl = (mca_bml_base_btl_t *) context;
mca_pml_ob1_rdma_frag_t *frag = (mca_pml_ob1_rdma_frag_t *) cbdata;
mca_pml_ob1_recv_request_t *recvreq = (mca_pml_ob1_recv_request_t *) frag->rdma_req;
/* check completion status */
if (OPAL_UNLIKELY(OMPI_SUCCESS != status)) {
status = mca_pml_ob1_recv_request_get_frag_failed (frag, status);
if (OPAL_UNLIKELY(OMPI_SUCCESS != status)) {
/* TSW - FIX */
OMPI_ERROR_LOG(status);
ompi_rte_abort(-1, NULL);
}
} else {
/* is receive request complete */
OPAL_THREAD_ADD_SIZE_T(&recvreq->req_bytes_received, frag->rdma_length);
/* TODO: re-add order */
mca_pml_ob1_send_fin (recvreq->req_recv.req_base.req_proc,
bml_btl, frag->rdma_hdr.hdr_rget.hdr_frag,
frag->rdma_length, 0, 0);
recv_request_pml_complete_check(recvreq);
MCA_PML_OB1_RDMA_FRAG_RETURN(frag);
}
MCA_PML_OB1_PROGRESS_PENDING(bml_btl);
}
static int mca_pml_ob1_recv_request_put_frag (mca_pml_ob1_rdma_frag_t *frag)
{
mca_pml_ob1_recv_request_t *recvreq = (mca_pml_ob1_recv_request_t *) frag->rdma_req;
#if OPAL_ENABLE_HETEROGENEOUS_SUPPORT
ompi_proc_t* proc = (ompi_proc_t*)recvreq->req_recv.req_base.req_proc;
#endif
mca_bml_base_btl_t *bml_btl = frag->rdma_bml;
mca_btl_base_descriptor_t *ctl;
mca_pml_ob1_rdma_hdr_t *hdr;
size_t reg_size;
int rc;
reg_size = bml_btl->btl->btl_registration_handle_size;
/* prepare a descriptor for rdma control message */
mca_bml_base_alloc (bml_btl, &ctl, MCA_BTL_NO_ORDER, sizeof (mca_pml_ob1_rdma_hdr_t) + reg_size,
MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP |
MCA_BTL_DES_SEND_ALWAYS_CALLBACK | MCA_BTL_DES_FLAGS_SIGNAL);
if (OPAL_UNLIKELY(NULL == ctl)) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
ctl->des_cbfunc = mca_pml_ob1_recv_ctl_completion;
/* fill in rdma header */
hdr = (mca_pml_ob1_rdma_hdr_t *) ctl->des_segments->seg_addr.pval;
mca_pml_ob1_rdma_hdr_prepare (hdr, (!recvreq->req_ack_sent) ? MCA_PML_OB1_HDR_TYPE_ACK : 0,
recvreq->remote_req_send.lval, frag, recvreq, frag->rdma_offset,
frag->local_address, frag->rdma_length, frag->local_handle,
reg_size);
ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_PUT, proc);
frag->cbfunc = mca_pml_ob1_put_completion;
recvreq->req_ack_sent = true;
PERUSE_TRACE_COMM_OMPI_EVENT( PERUSE_COMM_REQ_XFER_CONTINUE,
&(recvreq->req_recv.req_base), frag->rdma_length,
PERUSE_RECV);
/* send rdma request to peer */
rc = mca_bml_base_send (bml_btl, ctl, MCA_PML_OB1_HDR_TYPE_PUT);
if (OPAL_UNLIKELY(rc < 0)) {
mca_bml_base_free (bml_btl, ctl);
return rc;
}
return OMPI_SUCCESS;
}
/*
*
*/
int mca_pml_ob1_recv_request_get_frag (mca_pml_ob1_rdma_frag_t *frag)
{
mca_pml_ob1_recv_request_t *recvreq = (mca_pml_ob1_recv_request_t *) frag->rdma_req;
mca_btl_base_registration_handle_t *local_handle = NULL;
mca_bml_base_btl_t *bml_btl = frag->rdma_bml;
int rc;
/* prepare descriptor */
if (bml_btl->btl->btl_register_mem && !frag->local_handle && !recvreq->local_handle) {
mca_bml_base_register_mem (bml_btl, frag->local_address, frag->rdma_length, MCA_BTL_REG_FLAG_LOCAL_WRITE |
MCA_BTL_REG_FLAG_REMOTE_WRITE, &frag->local_handle);
if (OPAL_UNLIKELY(NULL == frag->local_handle)) {
return mca_pml_ob1_recv_request_get_frag_failed (frag, OMPI_ERR_OUT_OF_RESOURCE);
}
}
if (frag->local_handle) {
local_handle = frag->local_handle;
} else if (recvreq->local_handle) {
local_handle = recvreq->local_handle;
}
PERUSE_TRACE_COMM_OMPI_EVENT(PERUSE_COMM_REQ_XFER_CONTINUE,
&(((mca_pml_ob1_recv_request_t *) frag->rdma_req)->req_recv.req_base),
frag->rdma_length, PERUSE_RECV);
/* queue up get request */
rc = mca_bml_base_get (bml_btl, frag->local_address, frag->remote_address, local_handle,
(mca_btl_base_registration_handle_t *) frag->remote_handle, frag->rdma_length,
0, MCA_BTL_NO_ORDER, mca_pml_ob1_rget_completion, frag);
if( OPAL_UNLIKELY(OMPI_SUCCESS != rc) ) {
return mca_pml_ob1_recv_request_get_frag_failed (frag, OMPI_ERR_OUT_OF_RESOURCE);
}
return OMPI_SUCCESS;
}
/*
* Update the recv request status to reflect the number of bytes
* received and actually delivered to the application.
*/
void mca_pml_ob1_recv_request_progress_frag( mca_pml_ob1_recv_request_t* recvreq,
mca_btl_base_module_t* btl,
mca_btl_base_segment_t* segments,
size_t num_segments )
{
size_t bytes_received, data_offset = 0;
size_t bytes_delivered __opal_attribute_unused__; /* is being set to zero in MCA_PML_OB1_RECV_REQUEST_UNPACK */
mca_pml_ob1_hdr_t* hdr = (mca_pml_ob1_hdr_t*)segments->seg_addr.pval;
bytes_received = mca_pml_ob1_compute_segment_length_base (segments, num_segments,
sizeof(mca_pml_ob1_frag_hdr_t));
data_offset = hdr->hdr_frag.hdr_frag_offset;
/*
* Make user buffer accessible(defined) before unpacking.
*/
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_defined,
recvreq->req_recv.req_base.req_addr,
recvreq->req_recv.req_base.req_count,
recvreq->req_recv.req_base.req_datatype);
);
MCA_PML_OB1_RECV_REQUEST_UNPACK( recvreq,
segments,
num_segments,
sizeof(mca_pml_ob1_frag_hdr_t),
data_offset,
bytes_received,
bytes_delivered );
/*
* Unpacking finished, make the user buffer unaccessable again.
*/
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_noaccess,
recvreq->req_recv.req_base.req_addr,
recvreq->req_recv.req_base.req_count,
recvreq->req_recv.req_base.req_datatype);
);
OPAL_THREAD_ADD_SIZE_T(&recvreq->req_bytes_received, bytes_received);
/* check completion status */
if(recv_request_pml_complete_check(recvreq) == false &&
recvreq->req_rdma_offset < recvreq->req_send_offset) {
/* schedule additional rdma operations */
mca_pml_ob1_recv_request_schedule(recvreq, NULL);
}
}
#if OPAL_CUDA_SUPPORT /* CUDA_ASYNC_RECV */
/**
* This function is basically the first half of the code in the
* mca_pml_ob1_recv_request_progress_frag function. This fires off
* the asynchronous copy and returns. Unused fields in the descriptor
* are used to pass extra information for when the asynchronous copy
* completes. No memchecker support in this function as copies are
* happening asynchronously.
*/
void mca_pml_ob1_recv_request_frag_copy_start( mca_pml_ob1_recv_request_t* recvreq,
mca_btl_base_module_t* btl,
mca_btl_base_segment_t* segments,
size_t num_segments,
mca_btl_base_descriptor_t* des)
{
int result;
size_t bytes_received = 0, data_offset = 0;
size_t bytes_delivered __opal_attribute_unused__; /* is being set to zero in MCA_PML_OB1_RECV_REQUEST_UNPACK */
mca_pml_ob1_hdr_t* hdr = (mca_pml_ob1_hdr_t*)segments->seg_addr.pval;
OPAL_OUTPUT((-1, "start_frag_copy frag=%p", (void *)des));
bytes_received = mca_pml_ob1_compute_segment_length_base (segments, num_segments,
sizeof(mca_pml_ob1_frag_hdr_t));
data_offset = hdr->hdr_frag.hdr_frag_offset;
MCA_PML_OB1_RECV_REQUEST_UNPACK( recvreq,
segments,
num_segments,
sizeof(mca_pml_ob1_frag_hdr_t),
data_offset,
bytes_received,
bytes_delivered );
/* Store the receive request in unused context pointer. */
des->des_context = (void *)recvreq;
/* Store the amount of bytes in unused cbdata pointer */
des->des_cbdata = (void *) (intptr_t) bytes_delivered;
/* Then record an event that will get triggered by a PML progress call which
* checks the stream events. If we get an error, abort. Should get message
* from CUDA code about what went wrong. */
result = mca_common_cuda_record_htod_event("pml", des);
if (OMPI_SUCCESS != result) {
opal_output(0, "%s:%d FATAL", __FILE__, __LINE__);
ompi_rte_abort(-1, NULL);
}
}
/**
* This function is basically the second half of the code in the
* mca_pml_ob1_recv_request_progress_frag function. The number of
* bytes delivered is updated. Then a call is made into the BTL so it
* can free the fragment that held that data. This is currently
* called directly by the common CUDA code. No memchecker support
* in this function as copies are happening asynchronously.
*/
void mca_pml_ob1_recv_request_frag_copy_finished( mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* ep,
struct mca_btl_base_descriptor_t* des,
int status )
{
mca_pml_ob1_recv_request_t* recvreq = (mca_pml_ob1_recv_request_t*)des->des_context;
size_t bytes_received = (size_t) (intptr_t) des->des_cbdata;
OPAL_OUTPUT((-1, "frag_copy_finished (delivered=%d), frag=%p", (int)bytes_received, (void *)des));
/* Call into the BTL so it can free the descriptor. At this point, it is
* known that the data has been copied out of the descriptor. */
des->des_cbfunc(NULL, NULL, des, 0);
OPAL_THREAD_ADD_SIZE_T(&recvreq->req_bytes_received, bytes_received);
/* check completion status */
if(recv_request_pml_complete_check(recvreq) == false &&
recvreq->req_rdma_offset < recvreq->req_send_offset) {
/* schedule additional rdma operations */
mca_pml_ob1_recv_request_schedule(recvreq, NULL);
}
}
#endif /* OPAL_CUDA_SUPPORT */
/*
* Update the recv request status to reflect the number of bytes
* received and actually delivered to the application.
*/
void mca_pml_ob1_recv_request_progress_rget( mca_pml_ob1_recv_request_t* recvreq,
mca_btl_base_module_t* btl,
mca_btl_base_segment_t* segments,
size_t num_segments )
{
mca_pml_ob1_rget_hdr_t* hdr = (mca_pml_ob1_rget_hdr_t*)segments->seg_addr.pval;
mca_bml_base_endpoint_t* bml_endpoint = NULL;
size_t bytes_remaining, prev_sent, offset;
mca_pml_ob1_rdma_frag_t *frag;
mca_bml_base_btl_t *rdma_bml;
int rc;
prev_sent = offset = 0;
bytes_remaining = hdr->hdr_rndv.hdr_msg_length;
recvreq->req_recv.req_bytes_packed = hdr->hdr_rndv.hdr_msg_length;
recvreq->req_send_offset = 0;
MCA_PML_OB1_RECV_REQUEST_MATCHED(recvreq, &hdr->hdr_rndv.hdr_match);
/* if receive buffer is not contiguous we can't just RDMA read into it, so
* fall back to copy in/out protocol. It is a pity because buffer on the
* sender side is already registered. We need to be smarter here, perhaps
* do couple of RDMA reads */
if (opal_convertor_need_buffers(&recvreq->req_recv.req_base.req_convertor) == true) {
#if OPAL_CUDA_SUPPORT
if (mca_pml_ob1_cuda_need_buffers(recvreq, btl))
#endif /* OPAL_CUDA_SUPPORT */
{
mca_pml_ob1_recv_request_ack(recvreq, &hdr->hdr_rndv, 0);
return;
}
}
/* lookup bml datastructures */
bml_endpoint = mca_bml_base_get_endpoint (recvreq->req_recv.req_base.req_proc);
rdma_bml = mca_bml_base_btl_array_find(&bml_endpoint->btl_rdma, btl);
#if OPAL_CUDA_SUPPORT
if (OPAL_UNLIKELY(NULL == rdma_bml)) {
if (recvreq->req_recv.req_base.req_convertor.flags & CONVERTOR_CUDA) {
mca_bml_base_btl_t *bml_btl;
bml_btl = mca_bml_base_btl_array_find(&bml_endpoint->btl_send, btl);
/* Check to see if this is a CUDA get */
if (bml_btl->btl_flags & MCA_BTL_FLAGS_CUDA_GET) {
rdma_bml = bml_btl;
}
} else {
/* Just default back to send and receive. Must be mix of GPU and HOST memory. */
mca_pml_ob1_recv_request_ack(recvreq, &hdr->hdr_rndv, 0);
return;
}
}
#endif /* OPAL_CUDA_SUPPORT */
if (OPAL_UNLIKELY(NULL == rdma_bml)) {
opal_output(0, "[%s:%d] invalid bml for rdma get", __FILE__, __LINE__);
ompi_rte_abort(-1, NULL);
}
bytes_remaining = hdr->hdr_rndv.hdr_msg_length;
/* save the request for put fallback */
recvreq->remote_req_send = hdr->hdr_rndv.hdr_src_req;
recvreq->rdma_bml = rdma_bml;
/* try to register the entire buffer */
if (rdma_bml->btl->btl_register_mem) {
void *data_ptr;
uint32_t flags = MCA_BTL_REG_FLAG_LOCAL_WRITE | MCA_BTL_REG_FLAG_REMOTE_WRITE;
#if OPAL_CUDA_GDR_SUPPORT
if (recvreq->req_recv.req_base.req_convertor.flags & CONVERTOR_CUDA) {
flags |= MCA_BTL_REG_FLAG_CUDA_GPU_MEM;
}
#endif /* OPAL_CUDA_GDR_SUPPORT */
offset = 0;
OPAL_THREAD_LOCK(&recvreq->lock);
opal_convertor_set_position( &recvreq->req_recv.req_base.req_convertor, &offset);
opal_convertor_get_current_pointer (&recvreq->req_recv.req_base.req_convertor, &data_ptr);
OPAL_THREAD_UNLOCK(&recvreq->lock);
mca_bml_base_register_mem (rdma_bml, data_ptr, bytes_remaining, flags, &recvreq->local_handle);
/* It is not an error if the memory region can not be registered here. The registration will
* be attempted again for each get fragment. */
}
/* The while loop adds a fragmentation mechanism. The variable bytes_remaining holds the num
* of bytes left to be send. In each iteration we send the max possible bytes supported
* by the HCA. The field frag->rdma_length holds the actual num of bytes that were
* sent in each iteration. We subtract this number from bytes_remaining and continue to
* the next iteration with the updated size.
* Also - In each iteration we update the location in the buffer to be used for writing
* the message ,and the location to read from. This is done using the offset variable that
* accumulates the number of bytes that were sent so far.
*
* NTH: This fragmentation may go away if we change the btls to require them to handle
* get fragmentation internally. This is a reasonable solution since some btls do not
* need any fragmentation (sm, vader, self, etc). Remove this loop if this ends up
* being the case. */
while (bytes_remaining > 0) {
/* allocate/initialize a fragment */
MCA_PML_OB1_RDMA_FRAG_ALLOC(frag);
if (OPAL_UNLIKELY(NULL == frag)) {
/* GLB - FIX */
OMPI_ERROR_LOG(OMPI_ERR_OUT_OF_RESOURCE);
ompi_rte_abort(-1, NULL);
}
memcpy (frag->remote_handle, hdr + 1, btl->btl_registration_handle_size);
/* update the read location */
frag->remote_address = hdr->hdr_src_ptr + offset;
/* updating the write location */
OPAL_THREAD_LOCK(&recvreq->lock);
opal_convertor_set_position( &recvreq->req_recv.req_base.req_convertor, &offset);
opal_convertor_get_current_pointer (&recvreq->req_recv.req_base.req_convertor, &frag->local_address);
OPAL_THREAD_UNLOCK(&recvreq->lock);
frag->rdma_bml = rdma_bml;
frag->rdma_hdr.hdr_rget = *hdr;
frag->retries = 0;
frag->rdma_req = recvreq;
frag->rdma_state = MCA_PML_OB1_RDMA_GET;
frag->local_handle = NULL;
frag->rdma_offset = offset;
if (bytes_remaining > rdma_bml->btl->btl_get_limit) {
frag->rdma_length = rdma_bml->btl->btl_get_limit;
} else {
frag->rdma_length = bytes_remaining;
}
/* NTH: TODO -- handle error conditions gracefully */
rc = mca_pml_ob1_recv_request_get_frag(frag);
if (OMPI_SUCCESS != rc) {
break;
}
prev_sent = frag->rdma_length;
bytes_remaining -= prev_sent;
offset += prev_sent;
}
}
/*
* Update the recv request status to reflect the number of bytes
* received and actually delivered to the application.
*/
void mca_pml_ob1_recv_request_progress_rndv( mca_pml_ob1_recv_request_t* recvreq,
mca_btl_base_module_t* btl,
mca_btl_base_segment_t* segments,
size_t num_segments )
{
size_t bytes_received = 0;
size_t bytes_delivered __opal_attribute_unused__; /* is being set to zero in MCA_PML_OB1_RECV_REQUEST_UNPACK */
size_t data_offset = 0;
mca_pml_ob1_hdr_t* hdr = (mca_pml_ob1_hdr_t*)segments->seg_addr.pval;
bytes_received = mca_pml_ob1_compute_segment_length_base (segments, num_segments,
sizeof(mca_pml_ob1_rendezvous_hdr_t));
recvreq->req_recv.req_bytes_packed = hdr->hdr_rndv.hdr_msg_length;
recvreq->remote_req_send = hdr->hdr_rndv.hdr_src_req;
recvreq->req_rdma_offset = bytes_received;
MCA_PML_OB1_RECV_REQUEST_MATCHED(recvreq, &hdr->hdr_match);
mca_pml_ob1_recv_request_ack(recvreq, &hdr->hdr_rndv, bytes_received);
/**
* The PUT protocol do not attach any data to the original request.
* Therefore, we might want to avoid unpacking if there is nothing to
* unpack.
*/
if( 0 < bytes_received ) {
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_defined,
recvreq->req_recv.req_base.req_addr,
recvreq->req_recv.req_base.req_count,
recvreq->req_recv.req_base.req_datatype);
);
MCA_PML_OB1_RECV_REQUEST_UNPACK( recvreq,
segments,
num_segments,
sizeof(mca_pml_ob1_rendezvous_hdr_t),
data_offset,
bytes_received,
bytes_delivered );
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_noaccess,
recvreq->req_recv.req_base.req_addr,
recvreq->req_recv.req_base.req_count,
recvreq->req_recv.req_base.req_datatype);
);
}
OPAL_THREAD_ADD_SIZE_T(&recvreq->req_bytes_received, bytes_received);
/* check completion status */
if(recv_request_pml_complete_check(recvreq) == false &&
recvreq->req_rdma_offset < recvreq->req_send_offset) {
/* schedule additional rdma operations */
mca_pml_ob1_recv_request_schedule(recvreq, NULL);
}
#if OPAL_CUDA_SUPPORT /* CUDA_ASYNC_RECV */
/* If BTL supports it and this is a CUDA buffer being received into,
* have all subsequent FRAGS copied in asynchronously. */
if ((recvreq->req_recv.req_base.req_convertor.flags & CONVERTOR_CUDA) &&
(btl->btl_flags & MCA_BTL_FLAGS_CUDA_COPY_ASYNC_RECV)) {
void *strm = mca_common_cuda_get_htod_stream();
opal_cuda_set_copy_function_async(&recvreq->req_recv.req_base.req_convertor, strm);
}
#endif
}
/*
* Update the recv request status to reflect the number of bytes
* received and actually delivered to the application.
*/
void mca_pml_ob1_recv_request_progress_match( mca_pml_ob1_recv_request_t* recvreq,
mca_btl_base_module_t* btl,
mca_btl_base_segment_t* segments,
size_t num_segments )
{
size_t bytes_received, data_offset = 0;
size_t bytes_delivered __opal_attribute_unused__; /* is being set to zero in MCA_PML_OB1_RECV_REQUEST_UNPACK */
mca_pml_ob1_hdr_t* hdr = (mca_pml_ob1_hdr_t*)segments->seg_addr.pval;
bytes_received = mca_pml_ob1_compute_segment_length_base (segments, num_segments,
OMPI_PML_OB1_MATCH_HDR_LEN);
recvreq->req_recv.req_bytes_packed = bytes_received;
MCA_PML_OB1_RECV_REQUEST_MATCHED(recvreq, &hdr->hdr_match);
/*
* Make user buffer accessable(defined) before unpacking.
*/
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_defined,
recvreq->req_recv.req_base.req_addr,
recvreq->req_recv.req_base.req_count,
recvreq->req_recv.req_base.req_datatype);
);
MCA_PML_OB1_RECV_REQUEST_UNPACK( recvreq,
segments,
num_segments,
OMPI_PML_OB1_MATCH_HDR_LEN,
data_offset,
bytes_received,
bytes_delivered);
/*
* Unpacking finished, make the user buffer unaccessable again.
*/
MEMCHECKER(
memchecker_call(&opal_memchecker_base_mem_noaccess,
recvreq->req_recv.req_base.req_addr,
recvreq->req_recv.req_base.req_count,
recvreq->req_recv.req_base.req_datatype);
);
/*
* No need for atomic here, as we know there is only one fragment
* for this request.
*/
recvreq->req_bytes_received += bytes_received;
recv_request_pml_complete(recvreq);
}
/**
* Handle completion of a probe request
*/
void mca_pml_ob1_recv_request_matched_probe( mca_pml_ob1_recv_request_t* recvreq,
mca_btl_base_module_t* btl,
mca_btl_base_segment_t* segments,
size_t num_segments )
{
size_t bytes_packed = 0;
mca_pml_ob1_hdr_t* hdr = (mca_pml_ob1_hdr_t*)segments->seg_addr.pval;
switch(hdr->hdr_common.hdr_type) {
case MCA_PML_OB1_HDR_TYPE_MATCH:
bytes_packed = mca_pml_ob1_compute_segment_length_base (segments, num_segments,
OMPI_PML_OB1_MATCH_HDR_LEN);
break;
case MCA_PML_OB1_HDR_TYPE_RNDV:
case MCA_PML_OB1_HDR_TYPE_RGET:
bytes_packed = hdr->hdr_rndv.hdr_msg_length;
break;
}
/* set completion status */
recvreq->req_recv.req_base.req_ompi.req_status.MPI_TAG = hdr->hdr_match.hdr_tag;
recvreq->req_recv.req_base.req_ompi.req_status.MPI_SOURCE = hdr->hdr_match.hdr_src;
recvreq->req_bytes_received = bytes_packed;
recvreq->req_bytes_expected = bytes_packed;
recv_request_pml_complete(recvreq);
}
/*
* Schedule RDMA protocol.
*
*/
int mca_pml_ob1_recv_request_schedule_once( mca_pml_ob1_recv_request_t* recvreq,
mca_bml_base_btl_t *start_bml_btl )
{
mca_bml_base_btl_t* bml_btl;
int num_tries = recvreq->req_rdma_cnt, num_fail = 0;
size_t i, prev_bytes_remaining = 0;
size_t bytes_remaining = recvreq->req_send_offset -
recvreq->req_rdma_offset;
/* if starting bml_btl is provided schedule next fragment on it first */
if(start_bml_btl != NULL) {
for(i = 0; i < recvreq->req_rdma_cnt; i++) {
if(recvreq->req_rdma[i].bml_btl != start_bml_btl)
continue;
/* something left to be send? */
if( OPAL_LIKELY(recvreq->req_rdma[i].length) )
recvreq->req_rdma_idx = i;
break;
}
}
while(bytes_remaining > 0 &&
recvreq->req_pipeline_depth < mca_pml_ob1.recv_pipeline_depth) {
mca_pml_ob1_rdma_frag_t *frag = NULL;
mca_btl_base_module_t *btl;
int rc, rdma_idx;
void *data_ptr;
size_t size;
if(prev_bytes_remaining == bytes_remaining) {
if(++num_fail == num_tries) {
OPAL_THREAD_LOCK(&mca_pml_ob1.lock);
if(false == recvreq->req_pending) {
opal_list_append(&mca_pml_ob1.recv_pending,
(opal_list_item_t*)recvreq);
recvreq->req_pending = true;
}
OPAL_THREAD_UNLOCK(&mca_pml_ob1.lock);
return OMPI_ERR_OUT_OF_RESOURCE;
}
} else {
num_fail = 0;
prev_bytes_remaining = bytes_remaining;
}
do {
rdma_idx = recvreq->req_rdma_idx;
bml_btl = recvreq->req_rdma[rdma_idx].bml_btl;
size = recvreq->req_rdma[rdma_idx].length;
if(++recvreq->req_rdma_idx >= recvreq->req_rdma_cnt)
recvreq->req_rdma_idx = 0;
} while(!size);
btl = bml_btl->btl;
/* NTH: This conditional used to check if there was a registration in
* recvreq->req_rdma[rdma_idx].btl_reg. If once existed it was due to
* the btl not needed registration (equivalent to btl->btl_register_mem
* != NULL. This new check is equivalent. Note: I feel this protocol
* needs work to better improve resource usage when running with a
* leave pinned protocol. */
if (btl->btl_register_mem && (btl->btl_rdma_pipeline_frag_size != 0) &&
(size > btl->btl_rdma_pipeline_frag_size)) {
size = btl->btl_rdma_pipeline_frag_size;
}
MCA_PML_OB1_RDMA_FRAG_ALLOC(frag);
if (OPAL_UNLIKELY(NULL == frag)) {
continue;
}
/* take lock to protect convertor against concurrent access
* from unpack */
OPAL_THREAD_LOCK(&recvreq->lock);
opal_convertor_set_position (&recvreq->req_recv.req_base.req_convertor,
&recvreq->req_rdma_offset);
opal_convertor_get_current_pointer (&recvreq->req_recv.req_base.req_convertor, &data_ptr);
OPAL_THREAD_UNLOCK(&recvreq->lock);
if (btl->btl_register_mem) {
mca_bml_base_register_mem (bml_btl, data_ptr, size, MCA_BTL_REG_FLAG_REMOTE_WRITE,
&frag->local_handle);
if (OPAL_UNLIKELY(NULL == frag->local_handle)) {
MCA_PML_OB1_RDMA_FRAG_RETURN(frag);
continue;
}
}
/* fill in the minimum information needed to handle the fin message */
frag->cbfunc = mca_pml_ob1_put_completion;
frag->rdma_length = size;
frag->rdma_req = recvreq;
frag->rdma_bml = bml_btl;
frag->local_address = data_ptr;
frag->rdma_offset = recvreq->req_rdma_offset;
rc = mca_pml_ob1_recv_request_put_frag (frag);
if (OPAL_LIKELY(OMPI_SUCCESS == rc)) {
/* update request state */
recvreq->req_rdma_offset += size;
OPAL_THREAD_ADD_SIZE_T(&recvreq->req_pipeline_depth, 1);
recvreq->req_rdma[rdma_idx].length -= size;
bytes_remaining -= size;
} else {
MCA_PML_OB1_RDMA_FRAG_RETURN(frag);
}
}
return OMPI_SUCCESS;
}
#define IS_PROB_REQ(R) \
((MCA_PML_REQUEST_IPROBE == (R)->req_recv.req_base.req_type) || \
(MCA_PML_REQUEST_PROBE == (R)->req_recv.req_base.req_type) || \
(MCA_PML_REQUEST_IMPROBE == (R)->req_recv.req_base.req_type) || \
(MCA_PML_REQUEST_MPROBE == (R)->req_recv.req_base.req_type))
#define IS_MPROB_REQ(R) \
((MCA_PML_REQUEST_IMPROBE == (R)->req_recv.req_base.req_type) || \
(MCA_PML_REQUEST_MPROBE == (R)->req_recv.req_base.req_type))
static inline void append_recv_req_to_queue(opal_list_t *queue,
mca_pml_ob1_recv_request_t *req)
{
if(OPAL_UNLIKELY(req->req_recv.req_base.req_type == MCA_PML_REQUEST_IPROBE ||
req->req_recv.req_base.req_type == MCA_PML_REQUEST_IMPROBE))
return;
opal_list_append(queue, (opal_list_item_t*)req);
#if OMPI_WANT_PERUSE
/**
* We don't want to generate this kind of event for MPI_Probe.
*/
if (req->req_recv.req_base.req_type != MCA_PML_REQUEST_PROBE &&
req->req_recv.req_base.req_type != MCA_PML_REQUEST_MPROBE) {
PERUSE_TRACE_COMM_EVENT(PERUSE_COMM_REQ_INSERT_IN_POSTED_Q,
&(req->req_recv.req_base), PERUSE_RECV);
}
#endif
}
/*
* this routine tries to match a posted receive. If a match is found,
* it places the request in the appropriate matched receive list. This
* function has to be called with the communicator matching lock held.
*/
static mca_pml_ob1_recv_frag_t*
recv_req_match_specific_proc( const mca_pml_ob1_recv_request_t *req,
mca_pml_ob1_comm_proc_t *proc )
{
if (NULL == proc) {
return NULL;
}
opal_list_t* unexpected_frags = &proc->unexpected_frags;
mca_pml_ob1_recv_frag_t* frag;
int tag = req->req_recv.req_base.req_tag;
if(opal_list_get_size(unexpected_frags) == 0)
return NULL;
if( OMPI_ANY_TAG == tag ) {
OPAL_LIST_FOREACH(frag, unexpected_frags, mca_pml_ob1_recv_frag_t) {
if( frag->hdr.hdr_match.hdr_tag >= 0 )
return frag;
}
} else {
OPAL_LIST_FOREACH(frag, unexpected_frags, mca_pml_ob1_recv_frag_t) {
if( frag->hdr.hdr_match.hdr_tag == tag )
return frag;
}
}
return NULL;
}
/*
* this routine is used to try and match a wild posted receive - where
* wild is determined by the value assigned to the source process
*/
static mca_pml_ob1_recv_frag_t*
recv_req_match_wild( mca_pml_ob1_recv_request_t* req,
mca_pml_ob1_comm_proc_t **p)
{
mca_pml_ob1_comm_t* comm = req->req_recv.req_base.req_comm->c_pml_comm;
mca_pml_ob1_comm_proc_t **procp = comm->procs;
size_t i;
/*
* Loop over all the outstanding messages to find one that matches.
* There is an outer loop over lists of messages from each
* process, then an inner loop over the messages from the
* process.
*
* In order to avoid starvation do this in a round-robin fashion.
*/
for (i = comm->last_probed + 1; i < comm->num_procs; i++) {
mca_pml_ob1_recv_frag_t* frag;
/* loop over messages from the current proc */
if((frag = recv_req_match_specific_proc(req, procp[i]))) {
*p = procp[i];
comm->last_probed = i;
req->req_recv.req_base.req_proc = procp[i]->ompi_proc;
prepare_recv_req_converter(req);
return frag; /* match found */
}
}
for (i = 0; i <= comm->last_probed; i++) {
mca_pml_ob1_recv_frag_t* frag;
/* loop over messages from the current proc */
if((frag = recv_req_match_specific_proc(req, procp[i]))) {
*p = procp[i];
comm->last_probed = i;
req->req_recv.req_base.req_proc = procp[i]->ompi_proc;
prepare_recv_req_converter(req);
return frag; /* match found */
}
}
*p = NULL;
return NULL;
}
void mca_pml_ob1_recv_req_start(mca_pml_ob1_recv_request_t *req)
{
ompi_communicator_t *comm = req->req_recv.req_base.req_comm;
mca_pml_ob1_comm_t *ob1_comm = comm->c_pml_comm;
mca_pml_ob1_comm_proc_t* proc;
mca_pml_ob1_recv_frag_t* frag;
opal_list_t *queue;
mca_pml_ob1_hdr_t* hdr;
/* init/re-init the request */
req->req_lock = 0;
req->req_pipeline_depth = 0;
req->req_bytes_received = 0;
req->req_bytes_expected = 0;
/* What about req_rdma_cnt ? */
req->req_rdma_idx = 0;
req->req_pending = false;
req->req_ack_sent = false;
MCA_PML_BASE_RECV_START(&req->req_recv.req_base);
OPAL_THREAD_LOCK(&ob1_comm->matching_lock);
/**
* The laps of time between the ACTIVATE event and the SEARCH_UNEX one include
* the cost of the request lock.
*/
PERUSE_TRACE_COMM_EVENT(PERUSE_COMM_SEARCH_UNEX_Q_BEGIN,
&(req->req_recv.req_base), PERUSE_RECV);
/* assign sequence number */
req->req_recv.req_base.req_sequence = ob1_comm->recv_sequence++;
/* attempt to match posted recv */
if(req->req_recv.req_base.req_peer == OMPI_ANY_SOURCE) {
frag = recv_req_match_wild(req, &proc);
queue = &ob1_comm->wild_receives;
#if !OPAL_ENABLE_HETEROGENEOUS_SUPPORT
/* As we are in a homogeneous environment we know that all remote
* architectures are exactly the same as the local one. Therefore,
* we can safely construct the convertor based on the proc
* information of rank 0.
*/
if( NULL == frag ) {
req->req_recv.req_base.req_proc = ompi_proc_local_proc;
prepare_recv_req_converter(req);
}
#endif /* !OPAL_ENABLE_HETEROGENEOUS_SUPPORT */
} else {
proc = mca_pml_ob1_peer_lookup (comm, req->req_recv.req_base.req_peer);
req->req_recv.req_base.req_proc = proc->ompi_proc;
frag = recv_req_match_specific_proc(req, proc);
queue = &proc->specific_receives;
/* wild cardrecv will be prepared on match */
prepare_recv_req_converter(req);
}
if(OPAL_UNLIKELY(NULL == frag)) {
PERUSE_TRACE_COMM_EVENT(PERUSE_COMM_SEARCH_UNEX_Q_END,
&(req->req_recv.req_base), PERUSE_RECV);
/* We didn't find any matches. Record this irecv so we can match
it when the message comes in. */
append_recv_req_to_queue(queue, req);
req->req_match_received = false;
OPAL_THREAD_UNLOCK(&ob1_comm->matching_lock);
} else {
if(OPAL_LIKELY(!IS_PROB_REQ(req))) {
PERUSE_TRACE_COMM_EVENT(PERUSE_COMM_REQ_MATCH_UNEX,
&(req->req_recv.req_base), PERUSE_RECV);
hdr = (mca_pml_ob1_hdr_t*)frag->segments->seg_addr.pval;
PERUSE_TRACE_MSG_EVENT(PERUSE_COMM_MSG_REMOVE_FROM_UNEX_Q,
req->req_recv.req_base.req_comm,
hdr->hdr_match.hdr_src,
hdr->hdr_match.hdr_tag,
PERUSE_RECV);
PERUSE_TRACE_COMM_EVENT(PERUSE_COMM_SEARCH_UNEX_Q_END,
&(req->req_recv.req_base), PERUSE_RECV);
opal_list_remove_item(&proc->unexpected_frags,
(opal_list_item_t*)frag);
OPAL_THREAD_UNLOCK(&ob1_comm->matching_lock);
switch(hdr->hdr_common.hdr_type) {
case MCA_PML_OB1_HDR_TYPE_MATCH:
mca_pml_ob1_recv_request_progress_match(req, frag->btl, frag->segments,
frag->num_segments);
break;
case MCA_PML_OB1_HDR_TYPE_RNDV:
mca_pml_ob1_recv_request_progress_rndv(req, frag->btl, frag->segments,
frag->num_segments);
break;
case MCA_PML_OB1_HDR_TYPE_RGET:
mca_pml_ob1_recv_request_progress_rget(req, frag->btl, frag->segments,
frag->num_segments);
break;
default:
assert(0);
}
MCA_PML_OB1_RECV_FRAG_RETURN(frag);
} else if (OPAL_UNLIKELY(IS_MPROB_REQ(req))) {
/* Remove the fragment from the match list, as it's now
matched. Stash it somewhere in the request (which,
yes, is a complete hack), where it will be plucked out
during the end of mprobe. The request will then be
"recreated" as a receive request, and the frag will be
restarted with this request during mrecv */
opal_list_remove_item(&proc->unexpected_frags,
(opal_list_item_t*)frag);
OPAL_THREAD_UNLOCK(&ob1_comm->matching_lock);
req->req_recv.req_base.req_addr = frag;
mca_pml_ob1_recv_request_matched_probe(req, frag->btl,
frag->segments, frag->num_segments);
} else {
OPAL_THREAD_UNLOCK(&ob1_comm->matching_lock);
mca_pml_ob1_recv_request_matched_probe(req, frag->btl,
frag->segments, frag->num_segments);
}
}
}
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