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/*
* Copyright (c) 2013-2016 Intel, Inc. All rights reserved
*
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef MTL_OFI_H_HAS_BEEN_INCLUDED
#define MTL_OFI_H_HAS_BEEN_INCLUDED
#include "ompi/mca/pml/pml.h"
#include "ompi/mca/mtl/mtl.h"
#include "ompi/mca/mtl/base/base.h"
#include "opal/datatype/opal_convertor.h"
#include <rdma/fabric.h>
#include <rdma/fi_cm.h>
#include <rdma/fi_domain.h>
#include <rdma/fi_endpoint.h>
#include <rdma/fi_errno.h>
#include <rdma/fi_tagged.h>
#include "ompi_config.h"
#include "ompi/proc/proc.h"
#include "ompi/mca/mtl/mtl.h"
#include "opal/class/opal_list.h"
#include "ompi/communicator/communicator.h"
#include "opal/datatype/opal_convertor.h"
#include "ompi/mca/mtl/base/base.h"
#include "ompi/mca/mtl/base/mtl_base_datatype.h"
#include "ompi/message/message.h"
#include "mtl_ofi_types.h"
#include "mtl_ofi_request.h"
#include "mtl_ofi_endpoint.h"
#include "mtl_ofi_compat.h"
#define MTL_OFI_RETRY_UNTIL_DONE(FUNC) \
do { \
do { \
ret = FUNC; \
if(OPAL_LIKELY(0 == ret)) {break;} \
} while(-FI_EAGAIN == ret); \
} while(0);
BEGIN_C_DECLS
extern mca_mtl_ofi_module_t ompi_mtl_ofi;
extern mca_base_framework_t ompi_mtl_base_framework;
extern int ompi_mtl_ofi_del_procs(struct mca_mtl_base_module_t *mtl,
size_t nprocs,
struct ompi_proc_t **procs);
int ompi_mtl_ofi_progress_no_inline(void);
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_progress(void)
{
ssize_t ret;
int count = 0;
struct fi_cq_tagged_entry wc = { 0 };
struct fi_cq_err_entry error = { 0 };
ompi_mtl_ofi_request_t *ofi_req = NULL;
/**
* Read the work completions from the CQ.
* From the completion's op_context, we get the associated OFI request.
* Call the request's callback.
*/
while (true) {
ret = fi_cq_read(ompi_mtl_ofi.cq, (void *)&wc, 1);
if (ret > 0) {
count++;
if (NULL != wc.op_context) {
ofi_req = TO_OFI_REQ(wc.op_context);
assert(ofi_req);
ret = ofi_req->event_callback(&wc, ofi_req);
if (OMPI_SUCCESS != ret) {
opal_output(ompi_mtl_base_framework.framework_output,
"Error returned by request event callback: %zd",
ret);
abort();
}
}
} else if (ret == -FI_EAVAIL) {
/**
* An error occured and is being reported via the CQ.
* Read the error and forward it to the upper layer.
*/
ret = fi_cq_readerr(ompi_mtl_ofi.cq,
&error,
0);
if (0 > ret) {
opal_output(ompi_mtl_base_framework.framework_output,
"Error returned from fi_cq_readerr: %zd", ret);
abort();
}
assert(error.op_context);
ofi_req = TO_OFI_REQ(error.op_context);
assert(ofi_req);
ret = ofi_req->error_callback(&error, ofi_req);
if (OMPI_SUCCESS != ret) {
opal_output(ompi_mtl_base_framework.framework_output,
"Error returned by request error callback: %zd",
ret);
abort();
}
} else {
/**
* The CQ is empty. Return.
*/
break;
}
}
return count;
}
/* MTL interface functions */
int ompi_mtl_ofi_finalize(struct mca_mtl_base_module_t *mtl);
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_get_error(int error_num)
{
int ret;
switch (error_num) {
case 0:
ret = OMPI_SUCCESS;
break;
default:
ret = OMPI_ERROR;
}
return ret;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_send_callback(struct fi_cq_tagged_entry *wc,
ompi_mtl_ofi_request_t *ofi_req)
{
assert(ofi_req->completion_count > 0);
ofi_req->completion_count--;
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_send_error_callback(struct fi_cq_err_entry *error,
ompi_mtl_ofi_request_t *ofi_req)
{
switch(error->err) {
case FI_ETRUNC:
ofi_req->status.MPI_ERROR = MPI_ERR_TRUNCATE;
break;
default:
ofi_req->status.MPI_ERROR = MPI_ERR_INTERN;
}
return ofi_req->event_callback(NULL, ofi_req);
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_send_ack_callback(struct fi_cq_tagged_entry *wc,
ompi_mtl_ofi_request_t *ofi_req)
{
ompi_mtl_ofi_request_t *parent_req = ofi_req->parent;
free(ofi_req);
parent_req->event_callback(NULL, parent_req);
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_send_ack_error_callback(struct fi_cq_err_entry *error,
ompi_mtl_ofi_request_t *ofi_req)
{
ompi_mtl_ofi_request_t *parent_req = ofi_req->parent;
free(ofi_req);
parent_req->status.MPI_ERROR = MPI_ERR_INTERN;
return parent_req->error_callback(error, parent_req);
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_isend_callback(struct fi_cq_tagged_entry *wc,
ompi_mtl_ofi_request_t *ofi_req)
{
assert(ofi_req->completion_count > 0);
ofi_req->completion_count--;
if (0 == ofi_req->completion_count) {
/* Request completed */
if (OPAL_UNLIKELY(NULL != ofi_req->buffer)) {
free(ofi_req->buffer);
ofi_req->buffer = NULL;
}
ofi_req->super.ompi_req->req_status.MPI_ERROR =
ofi_req->status.MPI_ERROR;
ofi_req->super.completion_callback(&ofi_req->super);
}
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_send_start(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm,
int dest,
int tag,
struct opal_convertor_t *convertor,
mca_pml_base_send_mode_t mode,
ompi_mtl_ofi_request_t *ofi_req)
{
int ompi_ret;
void *start;
size_t length;
ssize_t ret;
bool free_after;
uint64_t match_bits;
ompi_proc_t *ompi_proc = NULL;
mca_mtl_ofi_endpoint_t *endpoint = NULL;
ompi_mtl_ofi_request_t *ack_req = NULL; /* For synchronous send */
ompi_proc = ompi_comm_peer_lookup(comm, dest);
endpoint = ompi_mtl_ofi_get_endpoint(mtl, ompi_proc);
ompi_ret = ompi_mtl_datatype_pack(convertor, &start, &length, &free_after);
if (OMPI_SUCCESS != ompi_ret) return ompi_ret;
ofi_req->buffer = (free_after) ? start : NULL;
ofi_req->length = length;
ofi_req->status.MPI_ERROR = OMPI_SUCCESS;
if (OPAL_UNLIKELY(MCA_PML_BASE_SEND_SYNCHRONOUS == mode)) {
ack_req = malloc(sizeof(ompi_mtl_ofi_request_t));
assert(ack_req);
ack_req->parent = ofi_req;
ack_req->event_callback = ompi_mtl_ofi_send_ack_callback;
ack_req->error_callback = ompi_mtl_ofi_send_ack_error_callback;
ofi_req->completion_count = 2;
MTL_OFI_SET_SEND_BITS(match_bits, comm->c_contextid,
comm->c_my_rank, tag, MTL_OFI_SYNC_SEND);
MTL_OFI_RETRY_UNTIL_DONE(fi_trecv(ompi_mtl_ofi.ep,
NULL,
0,
NULL,
endpoint->peer_fiaddr,
match_bits | MTL_OFI_SYNC_SEND_ACK,
0, /* Exact match, no ignore bits */
(void *) &ack_req->ctx));
if (OPAL_UNLIKELY(0 > ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_trecv failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
free(ack_req);
return ompi_mtl_ofi_get_error(ret);
}
} else {
ofi_req->completion_count = 1;
MTL_OFI_SET_SEND_BITS(match_bits, comm->c_contextid,
comm->c_my_rank, tag, 0);
}
if (ompi_mtl_ofi.max_inject_size >= length) {
MTL_OFI_RETRY_UNTIL_DONE(fi_tinject(ompi_mtl_ofi.ep,
start,
length,
endpoint->peer_fiaddr,
match_bits));
if (OPAL_UNLIKELY(0 > ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_tinject failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
if (ack_req) {
fi_cancel((fid_t)ompi_mtl_ofi.ep, &ack_req->ctx);
free(ack_req);
}
return ompi_mtl_ofi_get_error(ret);
}
ofi_req->event_callback(NULL,ofi_req);
} else {
MTL_OFI_RETRY_UNTIL_DONE(fi_tsend(ompi_mtl_ofi.ep,
start,
length,
NULL,
endpoint->peer_fiaddr,
match_bits,
(void *) &ofi_req->ctx));
if (OPAL_UNLIKELY(0 > ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_tsend failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
return ompi_mtl_ofi_get_error(ret);
}
}
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_send(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm,
int dest,
int tag,
struct opal_convertor_t *convertor,
mca_pml_base_send_mode_t mode)
{
int ret = OMPI_SUCCESS;
ompi_mtl_ofi_request_t ofi_req;
/**
* Create a send request, start it and wait until it completes.
*/
ofi_req.event_callback = ompi_mtl_ofi_send_callback;
ofi_req.error_callback = ompi_mtl_ofi_send_error_callback;
ret = ompi_mtl_ofi_send_start(mtl, comm, dest, tag,
convertor, mode, &ofi_req);
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
if (NULL != ofi_req.buffer) {
free(ofi_req.buffer);
}
return ret;
}
/**
* Wait until the request is completed.
* ompi_mtl_ofi_send_callback() updates this variable.
*/
while (0 < ofi_req.completion_count) {
ompi_mtl_ofi_progress();
}
if (OPAL_UNLIKELY(NULL != ofi_req.buffer)) {
free(ofi_req.buffer);
}
return ofi_req.status.MPI_ERROR;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_isend(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm,
int dest,
int tag,
struct opal_convertor_t *convertor,
mca_pml_base_send_mode_t mode,
bool blocking,
mca_mtl_request_t *mtl_request)
{
int ret = OMPI_SUCCESS;
ompi_mtl_ofi_request_t *ofi_req = (ompi_mtl_ofi_request_t*) mtl_request;
ofi_req->event_callback = ompi_mtl_ofi_isend_callback;
ofi_req->error_callback = ompi_mtl_ofi_send_error_callback;
ret = ompi_mtl_ofi_send_start(mtl, comm, dest, tag,
convertor, mode, ofi_req);
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret && NULL != ofi_req->buffer)) {
free(ofi_req->buffer);
}
return ret;
}
/**
* Called when a completion for SYNC ACK send is received.
* This completes the synchronous recv operation. Thus, we
* call the upper layer's completion function.
*/
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_sync_recv_callback(struct fi_cq_tagged_entry *wc,
ompi_mtl_ofi_request_t *ofi_req)
{
ofi_req->super.completion_callback(&ofi_req->super);
return OMPI_SUCCESS;
}
/**
* Called when a completion for a posted recv is received.
*/
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_recv_callback(struct fi_cq_tagged_entry *wc,
ompi_mtl_ofi_request_t *ofi_req)
{
int ompi_ret;
ssize_t ret;
ompi_proc_t *ompi_proc = NULL;
mca_mtl_ofi_endpoint_t *endpoint = NULL;
int src;
ompi_status_public_t *status = NULL;
assert(ofi_req->super.ompi_req);
status = &ofi_req->super.ompi_req->req_status;
/**
* Any event associated with a request starts it.
* This prevents a started request from being cancelled.
*/
ofi_req->req_started = true;
status->MPI_SOURCE = MTL_OFI_GET_SOURCE(wc->tag);
status->MPI_TAG = MTL_OFI_GET_TAG(wc->tag);
status->_ucount = wc->len;
if (OPAL_UNLIKELY(wc->len > ofi_req->length)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"truncate expected: %ld %ld",
wc->len, ofi_req->length);
status->MPI_ERROR = MPI_ERR_TRUNCATE;
}
/**
* Unpack data into recv buffer if necessary.
*/
if (OPAL_UNLIKELY(ofi_req->buffer)) {
ompi_ret = ompi_mtl_datatype_unpack(ofi_req->convertor,
ofi_req->buffer,
wc->len);
if (OPAL_UNLIKELY(OMPI_SUCCESS != ompi_ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: ompi_mtl_datatype_unpack failed: %d",
__FILE__, __LINE__, ompi_ret);
status->MPI_ERROR = ompi_ret;
}
}
/**
* We do not want any SYNC_SEND_ACK here!
* See mtl_ofi_send.c for details.
*/
assert(!MTL_OFI_IS_SYNC_SEND_ACK(wc->tag));
/**
* If this recv is part of an MPI_Ssend operation, then we send an
* acknowledgment back to the sender. The fi_context can be
* re-used safely because the previous operation has completed.
* This recv request will complete once we get a completion for
* this send. See ompi_mtl_ofi_sync_recv_callback().
* Otherwise, this request is now complete.
*/
if (OPAL_UNLIKELY(MTL_OFI_IS_SYNC_SEND(wc->tag))) {
ofi_req->event_callback = ompi_mtl_ofi_sync_recv_callback;
/**
* If the recv request was posted for any source,
* we need to extract the source's actual address.
*/
if (ompi_mtl_ofi.any_addr == ofi_req->remote_addr) {
src = MTL_OFI_GET_SOURCE(wc->tag);
ompi_proc = ompi_comm_peer_lookup(ofi_req->comm, src);
endpoint = ompi_mtl_ofi_get_endpoint(ofi_req->mtl, ompi_proc);
ofi_req->remote_addr = endpoint->peer_fiaddr;
}
MTL_OFI_RETRY_UNTIL_DONE(fi_tsend(ompi_mtl_ofi.ep,
NULL,
0,
NULL,
ofi_req->remote_addr,
wc->tag | MTL_OFI_SYNC_SEND_ACK,
(void *) &ofi_req->ctx));
if (OPAL_UNLIKELY(0 > ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_tsend failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
status->MPI_ERROR = OMPI_ERROR;
}
} else {
ofi_req->super.completion_callback(&ofi_req->super);
}
return OMPI_SUCCESS;
}
/**
* Called when an error occured on a recv request.
*/
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_recv_error_callback(struct fi_cq_err_entry *error,
ompi_mtl_ofi_request_t *ofi_req)
{
ompi_status_public_t *status;
assert(ofi_req->super.ompi_req);
status = &ofi_req->super.ompi_req->req_status;
status->MPI_TAG = MTL_OFI_GET_TAG(ofi_req->match_bits);
status->MPI_SOURCE = MTL_OFI_GET_SOURCE(ofi_req->match_bits);
switch (error->err) {
case FI_ETRUNC:
status->MPI_ERROR = MPI_ERR_TRUNCATE;
break;
case FI_ECANCELED:
status->_cancelled = true;
break;
default:
status->MPI_ERROR = MPI_ERR_INTERN;
}
ofi_req->super.completion_callback(&ofi_req->super);
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_irecv(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm,
int src,
int tag,
struct opal_convertor_t *convertor,
mca_mtl_request_t *mtl_request)
{
int ompi_ret = OMPI_SUCCESS;
ssize_t ret;
uint64_t match_bits, mask_bits;
fi_addr_t remote_addr;
ompi_proc_t *ompi_proc = NULL;
mca_mtl_ofi_endpoint_t *endpoint = NULL;
ompi_mtl_ofi_request_t *ofi_req = (ompi_mtl_ofi_request_t*) mtl_request;
void *start;
size_t length;
bool free_after;
if (MPI_ANY_SOURCE != src) {
ompi_proc = ompi_comm_peer_lookup(comm, src);
endpoint = ompi_mtl_ofi_get_endpoint(mtl, ompi_proc);
remote_addr = endpoint->peer_fiaddr;
} else {
remote_addr = ompi_mtl_ofi.any_addr;
}
MTL_OFI_SET_RECV_BITS(match_bits, mask_bits, comm->c_contextid, src, tag);
ompi_ret = ompi_mtl_datatype_recv_buf(convertor,
&start,
&length,
&free_after);
if (OPAL_UNLIKELY(OMPI_SUCCESS != ompi_ret)) {
return ompi_ret;
}
ofi_req->type = OMPI_MTL_OFI_RECV;
ofi_req->event_callback = ompi_mtl_ofi_recv_callback;
ofi_req->error_callback = ompi_mtl_ofi_recv_error_callback;
ofi_req->comm = comm;
ofi_req->buffer = (free_after) ? start : NULL;
ofi_req->length = length;
ofi_req->convertor = convertor;
ofi_req->req_started = false;
ofi_req->status.MPI_ERROR = OMPI_SUCCESS;
ofi_req->remote_addr = remote_addr;
ofi_req->match_bits = match_bits;
MTL_OFI_RETRY_UNTIL_DONE(fi_trecv(ompi_mtl_ofi.ep,
start,
length,
NULL,
remote_addr,
match_bits,
mask_bits,
(void *)&ofi_req->ctx));
if (OPAL_UNLIKELY(0 > ret)) {
if (NULL != ofi_req->buffer) {
free(ofi_req->buffer);
}
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_trecv failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
return ompi_mtl_ofi_get_error(ret);
}
return OMPI_SUCCESS;
}
/**
* Called when a mrecv request completes.
*/
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_mrecv_callback(struct fi_cq_tagged_entry *wc,
ompi_mtl_ofi_request_t *ofi_req)
{
struct mca_mtl_request_t *mrecv_req = ofi_req->mrecv_req;
ompi_status_public_t *status = &mrecv_req->ompi_req->req_status;
status->MPI_SOURCE = MTL_OFI_GET_SOURCE(wc->tag);
status->MPI_TAG = MTL_OFI_GET_TAG(wc->tag);
status->MPI_ERROR = MPI_SUCCESS;
status->_ucount = wc->len;
free(ofi_req);
mrecv_req->completion_callback(mrecv_req);
return OMPI_SUCCESS;
}
/**
* Called when an error occured on a mrecv request.
*/
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_mrecv_error_callback(struct fi_cq_err_entry *error,
ompi_mtl_ofi_request_t *ofi_req)
{
struct mca_mtl_request_t *mrecv_req = ofi_req->mrecv_req;
ompi_status_public_t *status = &mrecv_req->ompi_req->req_status;
status->MPI_TAG = MTL_OFI_GET_TAG(ofi_req->match_bits);
status->MPI_SOURCE = MTL_OFI_GET_SOURCE(ofi_req->match_bits);
switch (error->err) {
case FI_ETRUNC:
status->MPI_ERROR = MPI_ERR_TRUNCATE;
break;
case FI_ECANCELED:
status->_cancelled = true;
break;
default:
status->MPI_ERROR = MPI_ERR_INTERN;
}
free(ofi_req);
mrecv_req->completion_callback(mrecv_req);
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_imrecv(struct mca_mtl_base_module_t *mtl,
struct opal_convertor_t *convertor,
struct ompi_message_t **message,
struct mca_mtl_request_t *mtl_request)
{
ompi_mtl_ofi_request_t *ofi_req =
(ompi_mtl_ofi_request_t *)(*message)->req_ptr;
void *start;
size_t length;
bool free_after;
struct iovec iov;
struct fi_msg_tagged msg;
int ompi_ret;
ssize_t ret;
uint64_t msgflags = FI_CLAIM;
ompi_ret = ompi_mtl_datatype_recv_buf(convertor,
&start,
&length,
&free_after);
if (OPAL_UNLIKELY(OMPI_SUCCESS != ompi_ret)) {
return ompi_ret;
}
ofi_req->type = OMPI_MTL_OFI_RECV;
ofi_req->event_callback = ompi_mtl_ofi_mrecv_callback;
ofi_req->error_callback = ompi_mtl_ofi_mrecv_error_callback;
ofi_req->buffer = (free_after) ? start : NULL;
ofi_req->length = length;
ofi_req->convertor = convertor;
ofi_req->status.MPI_ERROR = OMPI_SUCCESS;
ofi_req->mrecv_req = mtl_request;
/**
* fi_trecvmsg with FI_CLAIM
*/
iov.iov_base = start;
iov.iov_len = length;
msg.msg_iov = &iov;
msg.desc = NULL;
msg.iov_count = 1;
msg.addr = 0;
msg.tag = 0;
msg.ignore = 0;
msg.context = (void *)&ofi_req->ctx;
msg.data = 0;
MTL_OFI_RETRY_UNTIL_DONE(fi_trecvmsg(ompi_mtl_ofi.ep, &msg, msgflags));
if (OPAL_UNLIKELY(0 > ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_trecvmsg failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
return ompi_mtl_ofi_get_error(ret);
}
return OMPI_SUCCESS;
}
/**
* Called when a probe request completes.
*/
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_probe_callback(struct fi_cq_tagged_entry *wc,
ompi_mtl_ofi_request_t *ofi_req)
{
ofi_req->match_state = 1;
ofi_req->match_bits = wc->tag;
ofi_req->status.MPI_SOURCE = MTL_OFI_GET_SOURCE(wc->tag);
ofi_req->status.MPI_TAG = MTL_OFI_GET_TAG(wc->tag);
ofi_req->status.MPI_ERROR = MPI_SUCCESS;
ofi_req->status._ucount = wc->len;
ofi_req->completion_count--;
return OMPI_SUCCESS;
}
/**
* Called when a probe request encounters an error.
*/
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_probe_error_callback(struct fi_cq_err_entry *error,
ompi_mtl_ofi_request_t *ofi_req)
{
ofi_req->status.MPI_ERROR = MPI_ERR_INTERN;
ofi_req->completion_count--;
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_iprobe(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm,
int src,
int tag,
int *flag,
struct ompi_status_public_t *status)
{
struct ompi_mtl_ofi_request_t ofi_req;
ompi_proc_t *ompi_proc = NULL;
mca_mtl_ofi_endpoint_t *endpoint = NULL;
fi_addr_t remote_proc = 0;
uint64_t match_bits, mask_bits;
ssize_t ret;
struct fi_msg_tagged msg;
uint64_t msgflags = FI_PEEK;
/**
* If the source is known, use its peer_fiaddr.
*/
if (MPI_ANY_SOURCE != src) {
ompi_proc = ompi_comm_peer_lookup( comm, src );
endpoint = ompi_mtl_ofi_get_endpoint(mtl, ompi_proc);
remote_proc = endpoint->peer_fiaddr;
}
MTL_OFI_SET_RECV_BITS(match_bits, mask_bits, comm->c_contextid, src, tag);
/**
* fi_trecvmsg with FI_PEEK:
* Initiate a search for a match in the hardware or software queue.
* The search can complete immediately with -ENOMSG.
* If successful, libfabric will enqueue a context entry into the completion
* queue to make the search nonblocking. This code will poll until the
* entry is enqueued.
*/
msg.msg_iov = NULL;
msg.desc = NULL;
msg.iov_count = 0;
msg.addr = remote_proc;
msg.tag = match_bits;
msg.ignore = mask_bits;
msg.context = (void *)&ofi_req.ctx;
msg.data = 0;
ofi_req.type = OMPI_MTL_OFI_PROBE;
ofi_req.event_callback = ompi_mtl_ofi_probe_callback;
ofi_req.error_callback = ompi_mtl_ofi_probe_error_callback;
ofi_req.completion_count = 1;
ofi_req.match_state = 0;
MTL_OFI_RETRY_UNTIL_DONE(fi_trecvmsg(ompi_mtl_ofi.ep, &msg, msgflags));
if (-FI_ENOMSG == ret) {
/**
* The search request completed but no matching message was found.
*/
*flag = 0;
return OMPI_SUCCESS;
} else if (OPAL_UNLIKELY(0 > ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_trecvmsg failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
return ompi_mtl_ofi_get_error(ret);
}
while (0 < ofi_req.completion_count) {
opal_progress();
}
*flag = ofi_req.match_state;
if (1 == *flag) {
if (MPI_STATUS_IGNORE != status) {
*status = ofi_req.status;
}
}
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_improbe(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm,
int src,
int tag,
int *matched,
struct ompi_message_t **message,
struct ompi_status_public_t *status)
{
struct ompi_mtl_ofi_request_t *ofi_req;
ompi_proc_t *ompi_proc = NULL;
mca_mtl_ofi_endpoint_t *endpoint = NULL;
fi_addr_t remote_proc = 0;
uint64_t match_bits, mask_bits;
ssize_t ret;
struct fi_msg_tagged msg;
uint64_t msgflags = FI_PEEK | FI_CLAIM;
ofi_req = malloc(sizeof *ofi_req);
if (NULL == ofi_req) {
return OMPI_ERROR;
}
/**
* If the source is known, use its peer_fiaddr.
*/
if (MPI_ANY_SOURCE != src) {
ompi_proc = ompi_comm_peer_lookup( comm, src );
endpoint = ompi_mtl_ofi_get_endpoint(mtl, ompi_proc);
remote_proc = endpoint->peer_fiaddr;
}
MTL_OFI_SET_RECV_BITS(match_bits, mask_bits, comm->c_contextid, src, tag);
/**
* fi_trecvmsg with FI_PEEK and FI_CLAIM:
* Initiate a search for a match in the hardware or software queue.
* The search can complete immediately with -ENOMSG.
* If successful, libfabric will enqueue a context entry into the completion
* queue to make the search nonblocking. This code will poll until the
* entry is enqueued.
*/
msg.msg_iov = NULL;
msg.desc = NULL;
msg.iov_count = 0;
msg.addr = remote_proc;
msg.tag = match_bits;
msg.ignore = mask_bits;
msg.context = (void *)&ofi_req->ctx;
msg.data = 0;
ofi_req->type = OMPI_MTL_OFI_PROBE;
ofi_req->event_callback = ompi_mtl_ofi_probe_callback;
ofi_req->error_callback = ompi_mtl_ofi_probe_error_callback;
ofi_req->completion_count = 1;
ofi_req->match_state = 0;
MTL_OFI_RETRY_UNTIL_DONE(fi_trecvmsg(ompi_mtl_ofi.ep, &msg, msgflags));
if (-FI_ENOMSG == ret) {
/**
* The search request completed but no matching message was found.
*/
*matched = 0;
free(ofi_req);
return OMPI_SUCCESS;
} else if (OPAL_UNLIKELY(0 > ret)) {
opal_output_verbose(1, ompi_mtl_base_framework.framework_output,
"%s:%d: fi_trecvmsg failed: %s(%zd)",
__FILE__, __LINE__, fi_strerror(-ret), ret);
free(ofi_req);
return ompi_mtl_ofi_get_error(ret);
}
while (0 < ofi_req->completion_count) {
opal_progress();
}
*matched = ofi_req->match_state;
if (1 == *matched) {
if (MPI_STATUS_IGNORE != status) {
*status = ofi_req->status;
}
(*message) = ompi_message_alloc();
if (NULL == (*message)) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
(*message)->comm = comm;
(*message)->req_ptr = ofi_req;
(*message)->peer = ofi_req->status.MPI_SOURCE;
(*message)->count = ofi_req->status._ucount;
} else {
(*message) = MPI_MESSAGE_NULL;
free(ofi_req);
}
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_cancel(struct mca_mtl_base_module_t *mtl,
mca_mtl_request_t *mtl_request,
int flag)
{
int ret;
ompi_mtl_ofi_request_t *ofi_req = (ompi_mtl_ofi_request_t*) mtl_request;
switch (ofi_req->type) {
case OMPI_MTL_OFI_SEND:
/**
* Cannot cancel sends yet
*/
break;
case OMPI_MTL_OFI_RECV:
/**
* Cancel a receive request only if it hasn't been matched yet.
* The event queue needs to be drained to make sure there isn't
* any pending receive completion event.
*/
ompi_mtl_ofi_progress();
if (!ofi_req->req_started) {
ret = fi_cancel((fid_t)ompi_mtl_ofi.ep, &ofi_req->ctx);
if (0 == ret) {
/**
* Wait for the request to be cancelled.
*/
while (!ofi_req->super.ompi_req->req_status._cancelled) {
opal_progress();
}
} else {
/**
* Could not cancel the request.
*/
ofi_req->super.ompi_req->req_status._cancelled = false;
}
}
break;
default:
return OMPI_ERROR;
}
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_add_comm(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm)
{
return OMPI_SUCCESS;
}
__opal_attribute_always_inline__ static inline int
ompi_mtl_ofi_del_comm(struct mca_mtl_base_module_t *mtl,
struct ompi_communicator_t *comm)
{
return OMPI_SUCCESS;
}
END_C_DECLS
#endif /* MTL_OFI_H_HAS_BEEN_INCLUDED */
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