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ports/openmpi
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openmpi/ompi/mca/btl/openib/btl_openib_endpoint.c
Gleb Natapov 90fb58de4f When frags are allocated from mpool by free_list the frag structure is also 
allocated from mpool memory (which is registered memory for RDMA transports)
This is not a problem for a small jobs, but for a big number of ranks an
amount of waisted memory is big.

This commit was SVN r13921.
2007-03-05 14:17:50 +00:00

1272 строки
46 KiB
C
Исходник Ответственный История

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 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) 2006 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2006 Los Alamos National Security, LLC. All rights
* reserved.
*
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <sys/time.h>
#include <time.h>
#include "ompi/types.h"
#include "ompi/mca/pml/base/pml_base_sendreq.h"
#include "orte/mca/ns/base/base.h"
#include "orte/mca/oob/base/base.h"
#include "orte/mca/rml/rml.h"
#include "orte/mca/errmgr/errmgr.h"
#include "orte/dss/dss.h"
#include "btl_openib.h"
#include "btl_openib_endpoint.h"
#include "btl_openib_proc.h"
#include "btl_openib_frag.h"
#include "ompi/class/ompi_free_list.h"
#include <errno.h>
#include <string.h>
static void mca_btl_openib_endpoint_construct(mca_btl_base_endpoint_t* endpoint);
static void mca_btl_openib_endpoint_destruct(mca_btl_base_endpoint_t* endpoint);
int mca_btl_openib_endpoint_create_qp(
mca_btl_openib_module_t* openib_btl,
struct ibv_pd* pd,
struct ibv_cq* cq,
struct ibv_srq* srq,
struct ibv_qp_attr* qp_attr,
struct ibv_qp** qp
);
int mca_btl_openib_endpoint_qp_init_query(
mca_btl_openib_module_t* openib_btl,
struct ibv_qp* qp,
struct ibv_qp_attr* attr,
uint32_t lcl_psn,
uint32_t rem_qp_num,
uint32_t rem_psn,
uint16_t rem_lid,
uint32_t rem_mtu,
uint32_t port_num
);
/*
* post a send to the work queue
*/
static int btl_openib_acquire_send_resources(
mca_btl_openib_module_t *openib_btl,
mca_btl_openib_endpoint_t *endpoint,
mca_btl_openib_frag_t *frag, int prio, int *do_rdma)
{
if(OPAL_THREAD_ADD32(&endpoint->sd_wqe[prio], -1) < 0) {
OPAL_THREAD_ADD32(&endpoint->sd_wqe[prio], 1);
opal_list_append(&endpoint->pending_frags[prio],
(opal_list_item_t *)frag);
return OMPI_ERR_OUT_OF_RESOURCE;
}
if(BTL_OPENIB_HP_QP == prio) {
if(OPAL_THREAD_ADD32(&endpoint->eager_rdma_remote.tokens, -1) < 0) {
OPAL_THREAD_ADD32(&endpoint->eager_rdma_remote.tokens, 1);
} else {
*do_rdma = 1;
return OMPI_SUCCESS;
}
}
if(mca_btl_openib_component.use_srq) {
if(OPAL_THREAD_ADD32(&openib_btl->sd_tokens[prio], -1) < 0) {
OPAL_THREAD_ADD32(&openib_btl->sd_tokens[prio], 1);
OPAL_THREAD_ADD32(&endpoint->sd_wqe[prio], 1);
OPAL_THREAD_LOCK(&openib_btl->ib_lock);
opal_list_append(&openib_btl->pending_frags[prio],
(opal_list_item_t *)frag);
OPAL_THREAD_UNLOCK(&openib_btl->ib_lock);
return OMPI_ERR_OUT_OF_RESOURCE;
}
} else {
if(OPAL_THREAD_ADD32(&endpoint->sd_tokens[prio], -1) < 0) {
OPAL_THREAD_ADD32(&endpoint->sd_tokens[prio], 1);
OPAL_THREAD_ADD32(&endpoint->sd_wqe[prio], 1);
opal_list_append(&endpoint->pending_frags[prio],
(opal_list_item_t *)frag);
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
return OMPI_SUCCESS;
}
/* this function os called with endpoint->endpoint_lock held */
static inline int mca_btl_openib_endpoint_post_send(mca_btl_openib_module_t* openib_btl,
mca_btl_openib_endpoint_t * endpoint,
mca_btl_openib_frag_t * frag)
{
int do_rdma = 0, prio;
struct ibv_send_wr* bad_wr;
frag->wr_desc.sr_desc.opcode = IBV_WR_SEND;
frag->sg_entry.addr = (unsigned long) frag->hdr;
prio = (frag->base.des_flags & MCA_BTL_DES_FLAGS_PRIORITY) ?
BTL_OPENIB_HP_QP : BTL_OPENIB_LP_QP;
if(btl_openib_acquire_send_resources(openib_btl, endpoint, frag,
prio, &do_rdma) == OMPI_ERR_OUT_OF_RESOURCE)
return MPI_SUCCESS;
if(BTL_OPENIB_HP_QP == prio && endpoint->eager_rdma_local.credits > 0) {
frag->hdr->credits = endpoint->eager_rdma_local.credits;
OPAL_THREAD_ADD32(&endpoint->eager_rdma_local.credits,
-frag->hdr->credits);
frag->hdr->credits |= BTL_OPENIB_RDMA_CREDITS_FLAG;
} else if(endpoint->rd_credits[prio] > 0) {
frag->hdr->credits = endpoint->rd_credits[prio];
OPAL_THREAD_ADD32(&endpoint->rd_credits[prio], -frag->hdr->credits);
} else {
frag->hdr->credits = 0;
}
frag->sg_entry.length =
frag->segment.seg_len + sizeof(mca_btl_openib_header_t) +
(do_rdma ? sizeof(mca_btl_openib_footer_t) : 0);
if(frag->sg_entry.length <= openib_btl->ib_inline_max) {
frag->wr_desc.sr_desc.send_flags = IBV_SEND_SIGNALED|IBV_SEND_INLINE;
} else {
frag->wr_desc.sr_desc.send_flags = IBV_SEND_SIGNALED;
}
if(do_rdma) {
mca_btl_openib_footer_t* ftr =
(mca_btl_openib_footer_t*)(((char*)frag->segment.seg_addr.pval) +
frag->segment.seg_len);
frag->wr_desc.sr_desc.opcode = IBV_WR_RDMA_WRITE;
MCA_BTL_OPENIB_RDMA_FRAG_SET_SIZE(ftr, frag->sg_entry.length);
MCA_BTL_OPENIB_RDMA_MAKE_LOCAL(ftr);
#if OMPI_ENABLE_DEBUG
((mca_btl_openib_footer_t*)(((char*)frag->segment.seg_addr.pval) +
frag->segment.seg_len))->seq =
endpoint->eager_rdma_remote.seq++;
#endif
if(endpoint->nbo) {
BTL_OPENIB_HEADER_HTON((*(frag->hdr)));
BTL_OPENIB_FOOTER_HTON((*ftr));
}
frag->wr_desc.sr_desc.wr.rdma.rkey = endpoint->eager_rdma_remote.rkey;
frag->wr_desc.sr_desc.wr.rdma.remote_addr =
endpoint->eager_rdma_remote.base.lval +
endpoint->eager_rdma_remote.head *
openib_btl->eager_rdma_frag_size +
sizeof(mca_btl_openib_header_t) +
mca_btl_openib_component.eager_limit +
sizeof(mca_btl_openib_footer_t);
frag->wr_desc.sr_desc.wr.rdma.remote_addr -= frag->sg_entry.length;
MCA_BTL_OPENIB_RDMA_NEXT_INDEX(endpoint->eager_rdma_remote.head);
} else {
if(mca_btl_openib_component.use_srq) {
frag->wr_desc.sr_desc.opcode = IBV_WR_SEND_WITH_IMM;
frag->wr_desc.sr_desc.imm_data = endpoint->rem_info.rem_index;
}
if(endpoint->nbo) {
BTL_OPENIB_HEADER_HTON((*(frag->hdr)));
}
}
if(ibv_post_send(endpoint->lcl_qp[prio], &frag->wr_desc.sr_desc,
&bad_wr)) {
if(endpoint->nbo) {
BTL_OPENIB_HEADER_NTOH((*(frag->hdr)));
}
if(BTL_OPENIB_IS_RDMA_CREDITS(frag->hdr->credits)) {
OPAL_THREAD_ADD32(&endpoint->eager_rdma_local.credits,
BTL_OPENIB_CREDITS(frag->hdr->credits));
} else {
OPAL_THREAD_ADD32(&endpoint->rd_credits[prio], frag->hdr->credits);
}
OPAL_THREAD_ADD32(&endpoint->sd_wqe[prio], 1);
if(do_rdma) {
OPAL_THREAD_ADD32(&endpoint->eager_rdma_remote.tokens, 1);
} else {
if(mca_btl_openib_component.use_srq) {
OPAL_THREAD_ADD32(&openib_btl->sd_tokens[prio], 1);
} else {
OPAL_THREAD_ADD32(&endpoint->sd_tokens[prio], 1);
}
}
BTL_ERROR(("error posting send request errno says %s\n",
strerror(errno)));
return OMPI_ERROR;
}
if(mca_btl_openib_component.use_srq) {
mca_btl_openib_post_srr(openib_btl, 1, BTL_OPENIB_HP_QP);
mca_btl_openib_post_srr(openib_btl, 1, BTL_OPENIB_LP_QP);
} else {
btl_openib_endpoint_post_rr(endpoint, 1, BTL_OPENIB_HP_QP);
btl_openib_endpoint_post_rr(endpoint, 1, BTL_OPENIB_LP_QP);
}
return OMPI_SUCCESS;
}
OBJ_CLASS_INSTANCE(mca_btl_openib_endpoint_t,
opal_list_item_t, mca_btl_openib_endpoint_construct,
mca_btl_openib_endpoint_destruct);
/*
* Initialize state of the endpoint instance.
*
*/
static void mca_btl_openib_endpoint_construct(mca_btl_base_endpoint_t* endpoint)
{
endpoint->endpoint_btl = 0;
endpoint->endpoint_proc = 0;
endpoint->endpoint_tstamp = 0.0;
endpoint->endpoint_state = MCA_BTL_IB_CLOSED;
endpoint->endpoint_retries = 0;
OBJ_CONSTRUCT(&endpoint->endpoint_lock, opal_mutex_t);
OBJ_CONSTRUCT(&endpoint->pending_send_frags, opal_list_t);
OBJ_CONSTRUCT(&endpoint->pending_frags[BTL_OPENIB_HP_QP], opal_list_t);
OBJ_CONSTRUCT(&endpoint->pending_frags[BTL_OPENIB_LP_QP], opal_list_t);
OBJ_CONSTRUCT(&endpoint->pending_get_frags, opal_list_t);
OBJ_CONSTRUCT(&endpoint->pending_put_frags, opal_list_t);
endpoint->lcl_qp_attr_hp = (struct ibv_qp_attr *) malloc(sizeof(struct ibv_qp_attr));
endpoint->lcl_qp_attr_lp = (struct ibv_qp_attr *) malloc(sizeof(struct ibv_qp_attr));
memset(endpoint->lcl_qp_attr_hp, 0, sizeof(struct ibv_qp_attr));
memset(endpoint->lcl_qp_attr_lp, 0, sizeof(struct ibv_qp_attr));
endpoint->rd_posted[BTL_OPENIB_HP_QP] = 0;
endpoint->rd_posted[BTL_OPENIB_LP_QP] = 0;
/* number of available send wqes */
endpoint->sd_wqe[BTL_OPENIB_HP_QP] = mca_btl_openib_component.rd_num;
endpoint->sd_wqe[BTL_OPENIB_LP_QP] = mca_btl_openib_component.rd_num;
/* zero these out w/ initial posting, so that we start out w/
* zero credits to return to peer
*/
endpoint->rd_credits[BTL_OPENIB_HP_QP] = -(mca_btl_openib_component.rd_num + mca_btl_openib_component.rd_rsv);
endpoint->rd_credits[BTL_OPENIB_LP_QP] = -(mca_btl_openib_component.rd_num + mca_btl_openib_component.rd_rsv);
endpoint->sd_credits[BTL_OPENIB_HP_QP] = 0;
endpoint->sd_credits[BTL_OPENIB_LP_QP] = 0;
/* initialize the high and low priority tokens */
endpoint->sd_tokens[BTL_OPENIB_HP_QP] = mca_btl_openib_component.rd_num;
endpoint->sd_tokens[BTL_OPENIB_LP_QP] = mca_btl_openib_component.rd_num;
endpoint->get_tokens = mca_btl_openib_component.ib_qp_ous_rd_atom;
/* initialize RDMA eager related parts */
endpoint->eager_recv_count = 0;
memset(&endpoint->eager_rdma_remote, 0,
sizeof(mca_btl_openib_eager_rdma_remote_t));
memset (&endpoint->eager_rdma_local, 0,
sizeof(mca_btl_openib_eager_rdma_local_t));
OBJ_CONSTRUCT(&endpoint->eager_rdma_local.lock, opal_mutex_t);
endpoint->rem_info.rem_qp_num_hp = 0;
endpoint->rem_info.rem_qp_num_lp = 0;
endpoint->rem_info.rem_lid = 0;
endpoint->rem_info.rem_psn_hp = 0;
endpoint->rem_info.rem_psn_lp = 0;
endpoint->rem_info.rem_subnet_id = 0;
endpoint->rem_info.rem_mtu = 0;
endpoint->nbo = false;
endpoint->use_eager_rdma = true;
}
/*
* Destroy a endpoint
*
*/
static void mca_btl_openib_endpoint_destruct(mca_btl_base_endpoint_t* endpoint)
{
}
/*
* Send connection information to remote endpoint using OOB
*
*/
static void mca_btl_openib_endpoint_send_cb(
int status,
orte_process_name_t* endpoint,
orte_buffer_t* buffer,
orte_rml_tag_t tag,
void* cbdata)
{
OBJ_RELEASE(buffer);
}
static int mca_btl_openib_endpoint_send_connect_data(mca_btl_base_endpoint_t* endpoint)
{
orte_buffer_t* buffer = OBJ_NEW(orte_buffer_t);
int rc;
if(NULL == buffer) {
ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
return ORTE_ERR_OUT_OF_RESOURCE;
}
/* pack the info in the send buffer */
rc = orte_dss.pack(buffer, &endpoint->lcl_qp[BTL_OPENIB_HP_QP]->qp_num, 1, ORTE_UINT32);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
rc = orte_dss.pack(buffer, &endpoint->lcl_qp[BTL_OPENIB_LP_QP]->qp_num, 1, ORTE_UINT32);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
rc = orte_dss.pack(buffer, &endpoint->lcl_psn_hp, 1, ORTE_UINT32);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
rc = orte_dss.pack(buffer, &endpoint->lcl_psn_lp, 1, ORTE_UINT32);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
rc = orte_dss.pack(buffer, &endpoint->endpoint_btl->lid, 1, ORTE_UINT16);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
rc = orte_dss.pack(buffer, &endpoint->subnet_id, 1, ORTE_UINT64);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
rc = orte_dss.pack(buffer, &endpoint->endpoint_btl->hca->mtu, 1, ORTE_UINT32);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
rc = orte_dss.pack(buffer, &endpoint->index, 1, ORTE_UINT32);
if(rc != ORTE_SUCCESS) {
ORTE_ERROR_LOG(rc);
return rc;
}
/* send to endpoint */
rc = orte_rml.send_buffer_nb(&endpoint->endpoint_proc->proc_guid, buffer, ORTE_RML_TAG_DYNAMIC-1, 0,
mca_btl_openib_endpoint_send_cb, NULL);
BTL_VERBOSE(("Sent High Priority QP num = %d, Low Priority QP num = %d, LID = %d, SUBNET = %016x\n",
endpoint->lcl_qp[BTL_OPENIB_HP_QP]->qp_num,
endpoint->lcl_qp[BTL_OPENIB_LP_QP]->qp_num,
endpoint->endpoint_btl->lid,
endpoint->subnet_id));
if(rc < 0) {
ORTE_ERROR_LOG(rc);
return rc;
}
return OMPI_SUCCESS;
}
/*
* Set remote connection info
* (from OOB connection)
*
*/
static int mca_btl_openib_endpoint_set_remote_info(mca_btl_base_endpoint_t* endpoint, mca_btl_openib_rem_info_t* rem_info)
{
memcpy(&((mca_btl_openib_endpoint_t*) endpoint)->rem_info, rem_info, sizeof(mca_btl_openib_rem_info_t));
BTL_VERBOSE(("Setting High Priority QP num = %d, Low Priority QP num %d, LID = %d",
endpoint->rem_info.rem_qp_num_hp,
endpoint->rem_info.rem_qp_num_lp,
endpoint->rem_info.rem_lid));
return ORTE_SUCCESS;
}
/*
* Start to connect to the endpoint. We send our Queue Pair
* information over the TCP OOB communication mechanism.
* On completion of our send, a send completion handler
* is called.
*
*/
static int mca_btl_openib_endpoint_start_connect(mca_btl_base_endpoint_t* endpoint)
{
int rc;
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*) endpoint->endpoint_btl;
/* Create the High Priority Queue Pair */
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_create_qp(openib_btl,
openib_btl->hca->ib_pd,
openib_btl->ib_cq[BTL_OPENIB_HP_QP],
openib_btl->srq[BTL_OPENIB_HP_QP],
endpoint->lcl_qp_attr_hp,
&endpoint->lcl_qp[BTL_OPENIB_HP_QP]))) {
BTL_ERROR(("error creating queue pair, error code %d", rc));
return rc;
}
srand48(getpid() * time(NULL));
endpoint->lcl_psn_hp = lrand48() & 0xffffff;
/* Create the Low Priority Queue Pair */
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_create_qp(openib_btl,
openib_btl->hca->ib_pd,
openib_btl->ib_cq[BTL_OPENIB_LP_QP],
openib_btl->srq[BTL_OPENIB_LP_QP],
endpoint->lcl_qp_attr_lp,
&endpoint->lcl_qp[BTL_OPENIB_LP_QP]))) {
BTL_ERROR(("error creating queue pair, error code %d", rc));
return rc;
}
endpoint->lcl_psn_lp = lrand48() & 0xffffff;
BTL_VERBOSE(("Initialized High Priority QP num = %d, Low Priority QP num = %d, LID = %d",
endpoint->lcl_qp[BTL_OPENIB_HP_QP]->qp_num,
endpoint->lcl_qp[BTL_OPENIB_LP_QP]->qp_num,
openib_btl->lid));
/* Send connection info over to remote endpoint */
endpoint->endpoint_state = MCA_BTL_IB_CONNECTING;
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_send_connect_data(endpoint))) {
BTL_ERROR(("error sending connect request, error code %d", rc));
return rc;
}
return OMPI_SUCCESS;
}
/*
* Reply to a `start - connect' message
*
*/
static int mca_btl_openib_endpoint_reply_start_connect(mca_btl_openib_endpoint_t *endpoint,
mca_btl_openib_rem_info_t *rem_info)
{
int rc;
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*) endpoint->endpoint_btl;
/* Create the High Priority Queue Pair */
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_create_qp(openib_btl,
openib_btl->hca->ib_pd,
openib_btl->ib_cq[BTL_OPENIB_HP_QP],
openib_btl->srq[BTL_OPENIB_HP_QP],
endpoint->lcl_qp_attr_hp,
&endpoint->lcl_qp[BTL_OPENIB_HP_QP]))) {
BTL_ERROR(("error creating queue pair, error code %d", rc));
return rc;
}
srand48(getpid() * time(NULL));
endpoint->lcl_psn_hp = lrand48() & 0xffffff;
/* Create the Low Priority Queue Pair */
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_create_qp(openib_btl,
openib_btl->hca->ib_pd,
openib_btl->ib_cq[BTL_OPENIB_LP_QP],
openib_btl->srq[BTL_OPENIB_LP_QP],
endpoint->lcl_qp_attr_lp,
&endpoint->lcl_qp[BTL_OPENIB_LP_QP]))) {
BTL_ERROR(("error creating queue pair, error code %d", rc));
return rc;
}
endpoint->lcl_psn_lp = lrand48() & 0xffffff;
BTL_VERBOSE(("Initialized High Priority QP num = %d, Low Priority QP num = %d, LID = %d",
endpoint->lcl_qp[BTL_OPENIB_HP_QP]->qp_num,
endpoint->lcl_qp[BTL_OPENIB_LP_QP]->qp_num,
openib_btl->lid));
/* Set the remote side info */
mca_btl_openib_endpoint_set_remote_info(endpoint, rem_info);
/* Connect to endpoint */
rc = mca_btl_openib_endpoint_connect(endpoint);
if(rc != OMPI_SUCCESS) {
BTL_ERROR(("error in endpoint connect error code is %d", rc));
return rc;
}
/* Send connection info over to remote endpoint */
endpoint->endpoint_state = MCA_BTL_IB_CONNECT_ACK;
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_send_connect_data(endpoint))) {
BTL_ERROR(("error in endpoint send connect request error code is %d", rc));
return rc;
}
return OMPI_SUCCESS;
}
/*
* endpoint is waiting ack to final connection establishment..
*/
static void mca_btl_openib_endpoint_waiting_ack(mca_btl_openib_endpoint_t *endpoint) {
endpoint->endpoint_state = MCA_BTL_IB_WAITING_ACK;
}
/*
* called when the openib has completed setup via the
* OOB channel
*/
static void mca_btl_openib_endpoint_connected(mca_btl_openib_endpoint_t *endpoint)
{
opal_list_item_t *frag_item;
mca_btl_openib_frag_t *frag;
mca_btl_openib_module_t* openib_btl;
endpoint->endpoint_state = MCA_BTL_IB_CONNECTED;
endpoint->endpoint_btl->poll_cq = true;
/**
* The connection is correctly setup. Now we can decrease the event trigger.
*/
opal_progress_event_users_decrement();
/* While there are frags in the list,
* process them */
while(!opal_list_is_empty(&(endpoint->pending_send_frags))) {
frag_item = opal_list_remove_first(&(endpoint->pending_send_frags));
frag = (mca_btl_openib_frag_t *) frag_item;
openib_btl = endpoint->endpoint_btl;
/* We need to post this one */
if(OMPI_SUCCESS != mca_btl_openib_endpoint_post_send(openib_btl, endpoint, frag))
BTL_ERROR(("Error posting send"));
}
}
/*
* Non blocking OOB recv callback.
* Read incoming QP and other info, and if this endpoint
* is trying to connect, reply with our QP info,
* otherwise try to modify QP's and establish
* reliable connection
*
*/
static void mca_btl_openib_endpoint_recv(
int status,
orte_process_name_t* process_name,
orte_buffer_t* buffer,
orte_rml_tag_t tag,
void* cbdata)
{
mca_btl_openib_proc_t *ib_proc;
mca_btl_openib_endpoint_t *ib_endpoint = NULL;
int endpoint_state;
int rc;
uint32_t i;
int32_t cnt = 1;
mca_btl_openib_rem_info_t rem_info;
/* start by unpacking data first so we know who is knocking at
our door */
rc = orte_dss.unpack(buffer, &rem_info.rem_qp_num_hp, &cnt, ORTE_UINT32);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
rc = orte_dss.unpack(buffer, &rem_info.rem_qp_num_lp, &cnt, ORTE_UINT32);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
rc = orte_dss.unpack(buffer, &rem_info.rem_psn_hp, &cnt, ORTE_UINT32);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
rc = orte_dss.unpack(buffer, &rem_info.rem_psn_lp, &cnt, ORTE_UINT32);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
rc = orte_dss.unpack(buffer, &rem_info.rem_lid, &cnt, ORTE_UINT16);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
rc = orte_dss.unpack(buffer, &rem_info.rem_subnet_id, &cnt, ORTE_UINT64);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
rc = orte_dss.unpack(buffer, &rem_info.rem_mtu, &cnt, ORTE_UINT32);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
rc = orte_dss.unpack(buffer, &rem_info.rem_index, &cnt, ORTE_UINT32);
if(ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
return;
}
BTL_VERBOSE(("Received High Priority QP num = %d, Low Priority QP num %d, LID = %d, SUBNET = %016x\n",
rem_info.rem_qp_num_hp,
rem_info.rem_qp_num_lp,
rem_info.rem_lid,
rem_info.rem_subnet_id));
for(ib_proc = (mca_btl_openib_proc_t*)
opal_list_get_first(&mca_btl_openib_component.ib_procs);
ib_proc != (mca_btl_openib_proc_t*)
opal_list_get_end(&mca_btl_openib_component.ib_procs);
ib_proc = (mca_btl_openib_proc_t*)opal_list_get_next(ib_proc)) {
if(orte_ns.compare_fields(ORTE_NS_CMP_ALL, &ib_proc->proc_guid, process_name) == ORTE_EQUAL) {
bool found = false;
/* Try to get the endpoint instance of this proc */
for(i = 0; i < ib_proc->proc_endpoint_count; i++) {
mca_btl_openib_port_info_t port_info;
port_info = ib_proc->proc_ports[i];
ib_endpoint = ib_proc->proc_endpoints[i];
if(ib_endpoint->rem_info.rem_lid &&
(ib_endpoint->rem_info.rem_lid == rem_info.rem_lid &&
ib_endpoint->rem_info.rem_qp_num_hp == rem_info.rem_qp_num_hp)) {
/* we've seen them before! */
found = true;
break;
}
}
/* If we haven't seen this remote lid before then try to match on
endpoint */
for(i = 0; !found && i < ib_proc->proc_endpoint_count; i++) {
mca_btl_openib_port_info_t port_info;
port_info = ib_proc->proc_ports[i];
ib_endpoint = ib_proc->proc_endpoints[i];
if(!ib_endpoint->rem_info.rem_lid &&
ib_endpoint->subnet_id == rem_info.rem_subnet_id) {
/* found a match based on subnet! */
found = true;
break;
}
}
if(!found) {
BTL_ERROR(("can't find suitable endpoint for this peer\n"));
return;
}
OPAL_THREAD_LOCK(&ib_endpoint->endpoint_lock);
endpoint_state = ib_endpoint->endpoint_state;
/* Update status */
switch(endpoint_state) {
case MCA_BTL_IB_CLOSED :
/* We had this connection closed before.
* The endpoint is trying to connect. Move the
* status of this connection to CONNECTING,
* and then reply with our QP information */
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_reply_start_connect(ib_endpoint, &rem_info))) {
BTL_ERROR(("error in endpoint reply start connect"));
break;
}
/** As long as we expect a message from the peer (in order to setup the connection)
* let the event engine pool the OOB events. Note: we increment it once peer active
* connection.
*/
opal_progress_event_users_increment();
break;
case MCA_BTL_IB_CONNECTING :
mca_btl_openib_endpoint_set_remote_info(ib_endpoint, &rem_info);
if(OMPI_SUCCESS != (rc = mca_btl_openib_endpoint_connect(ib_endpoint))) {
BTL_ERROR(("endpoint connect error: %d", rc));
break;
}
/* Setup state as awaiting ack from peer */
mca_btl_openib_endpoint_waiting_ack(ib_endpoint);
/* Send him an ack */
mca_btl_openib_endpoint_send_connect_data(ib_endpoint);
break;
case MCA_BTL_IB_WAITING_ACK:
mca_btl_openib_endpoint_connected(ib_endpoint);
break;
case MCA_BTL_IB_CONNECT_ACK:
mca_btl_openib_endpoint_send_connect_data(ib_endpoint);
mca_btl_openib_endpoint_connected(ib_endpoint);
break;
case MCA_BTL_IB_CONNECTED :
break;
default :
BTL_ERROR(("Invalid endpoint state %d", endpoint_state));
}
OPAL_THREAD_UNLOCK(&ib_endpoint->endpoint_lock);
break;
}
}
}
/*
* Post the OOB recv (for receiving the peers information)
*/
void mca_btl_openib_post_recv()
{
orte_rml.recv_buffer_nb(
ORTE_NAME_WILDCARD,
ORTE_RML_TAG_DYNAMIC-1,
ORTE_RML_PERSISTENT,
mca_btl_openib_endpoint_recv,
NULL);
}
/*
* Attempt to send a fragment using a given endpoint. If the endpoint is not
* connected, queue the fragment and start the connection as required.
*/
int mca_btl_openib_endpoint_send(
mca_btl_base_endpoint_t* endpoint,
mca_btl_openib_frag_t* frag
)
{
int rc;
bool call_progress = false;
mca_btl_openib_module_t *openib_btl;
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
switch(endpoint->endpoint_state) {
case MCA_BTL_IB_CONNECTING:
BTL_VERBOSE(("Queing because state is connecting"));
opal_list_append(&endpoint->pending_send_frags,
(opal_list_item_t *)frag);
call_progress = true;
rc = OMPI_SUCCESS;
break;
case MCA_BTL_IB_CONNECT_ACK:
case MCA_BTL_IB_WAITING_ACK:
BTL_VERBOSE(("Queuing because waiting for ack"));
opal_list_append(&endpoint->pending_send_frags,
(opal_list_item_t *)frag);
call_progress = true;
rc = OMPI_SUCCESS;
break;
case MCA_BTL_IB_CLOSED:
BTL_VERBOSE(("Connection to endpoint closed ... connecting ..."));
opal_list_append(&endpoint->pending_send_frags,
(opal_list_item_t *)frag);
rc = mca_btl_openib_endpoint_start_connect(endpoint);
/**
* As long as we expect a message from the peer (in order to setup the connection)
* let the event engine pool the OOB events. Note: we increment it once peer active
* connection.
*/
opal_progress_event_users_increment();
call_progress = true;
break;
case MCA_BTL_IB_FAILED:
rc = OMPI_ERR_UNREACH;
break;
case MCA_BTL_IB_CONNECTED:
{
openib_btl = endpoint->endpoint_btl;
BTL_VERBOSE(("Send to : %d, len : %lu, frag : %p",
endpoint->endpoint_proc->proc_guid.vpid,
frag->sg_entry.length,
frag));
rc = mca_btl_openib_endpoint_post_send(openib_btl, endpoint, frag);
break;
}
default:
rc = OMPI_ERR_UNREACH;
}
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
if(call_progress) opal_progress();
return rc;
}
/*
* Complete connection to endpoint.
*/
int mca_btl_openib_endpoint_connect(
mca_btl_openib_endpoint_t *endpoint)
{
int rc;
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*) endpoint->endpoint_btl;
/* Connection establishment RC */
rc = mca_btl_openib_endpoint_qp_init_query(openib_btl,
endpoint->lcl_qp[BTL_OPENIB_HP_QP],
endpoint->lcl_qp_attr_hp,
endpoint->lcl_psn_hp,
endpoint->rem_info.rem_qp_num_hp,
endpoint->rem_info.rem_psn_hp,
endpoint->rem_info.rem_lid,
endpoint->rem_info.rem_mtu,
openib_btl->port_num);
if(rc != OMPI_SUCCESS) {
return rc;
}
rc = mca_btl_openib_endpoint_qp_init_query(openib_btl,
endpoint->lcl_qp[BTL_OPENIB_LP_QP],
endpoint->lcl_qp_attr_lp,
endpoint->lcl_psn_lp,
endpoint->rem_info.rem_qp_num_lp,
endpoint->rem_info.rem_psn_lp,
endpoint->rem_info.rem_lid,
endpoint->rem_info.rem_mtu,
openib_btl->port_num);
if(rc != OMPI_SUCCESS) {
return rc;
}
MCA_BTL_IB_FRAG_ALLOC_CREDIT_WAIT(openib_btl,
endpoint->credit_frag[BTL_OPENIB_HP_QP], rc);
MCA_BTL_IB_FRAG_ALLOC_CREDIT_WAIT(openib_btl,
endpoint->credit_frag[BTL_OPENIB_LP_QP], rc);
if(mca_btl_openib_component.use_srq) {
mca_btl_openib_post_srr(openib_btl, 1, BTL_OPENIB_HP_QP);
mca_btl_openib_post_srr(openib_btl, 1, BTL_OPENIB_LP_QP);
} else {
btl_openib_endpoint_post_rr(endpoint, 1, BTL_OPENIB_HP_QP);
btl_openib_endpoint_post_rr(endpoint, 1, BTL_OPENIB_LP_QP);
}
return OMPI_SUCCESS;
}
/*
* Create the queue pair note that this is just the initial
* queue pair creation and we need to get the remote queue pair
* info from the peer before the qp is usable,
*/
int mca_btl_openib_endpoint_create_qp(
mca_btl_openib_module_t* openib_btl,
struct ibv_pd* pd,
struct ibv_cq* cq,
struct ibv_srq* srq,
struct ibv_qp_attr* qp_attr,
struct ibv_qp** qp
)
{
{
struct ibv_qp* my_qp;
struct ibv_qp_init_attr qp_init_attr;
memset(&qp_init_attr, 0, sizeof(struct ibv_qp_init_attr));
qp_init_attr.send_cq = cq;
qp_init_attr.recv_cq = cq;
qp_init_attr.cap.max_send_wr = mca_btl_openib_component.rd_num + 1;
qp_init_attr.cap.max_recv_wr = mca_btl_openib_component.rd_num + mca_btl_openib_component.rd_rsv;
qp_init_attr.cap.max_send_sge = mca_btl_openib_component.ib_sg_list_size;
qp_init_attr.cap.max_recv_sge = mca_btl_openib_component.ib_sg_list_size;
qp_init_attr.qp_type = IBV_QPT_RC;
if(mca_btl_openib_component.use_srq) {
qp_init_attr.srq = srq;
}
my_qp = ibv_create_qp(pd, &qp_init_attr);
if(NULL == my_qp) {
BTL_ERROR(("error creating qp errno says %s", strerror(errno)));
return OMPI_ERROR;
}
(*qp) = my_qp;
openib_btl->ib_inline_max = qp_init_attr.cap.max_inline_data;
}
{
qp_attr->qp_state = IBV_QPS_INIT;
qp_attr->pkey_index = mca_btl_openib_component.ib_pkey_ix;
qp_attr->port_num = openib_btl->port_num;
qp_attr->qp_access_flags = IBV_ACCESS_REMOTE_WRITE | IBV_ACCESS_REMOTE_READ;
if(ibv_modify_qp((*qp), qp_attr,
IBV_QP_STATE |
IBV_QP_PKEY_INDEX |
IBV_QP_PORT |
IBV_QP_ACCESS_FLAGS )) {
BTL_ERROR(("error modifying qp to INIT errno says %s", strerror(errno)));
return OMPI_ERROR;
}
}
return OMPI_SUCCESS;
}
/*
* The queue pair has been created and we have received the remote
* queue pair information from the peer so we init this queue pair
* and are ready to roll.
*/
int mca_btl_openib_endpoint_qp_init_query(
mca_btl_openib_module_t* openib_btl,
struct ibv_qp* qp,
struct ibv_qp_attr* attr,
uint32_t lcl_psn,
uint32_t rem_qp_num,
uint32_t rem_psn,
uint16_t rem_lid,
uint32_t rem_mtu,
uint32_t port_num
)
{
attr->qp_state = IBV_QPS_RTR;
attr->path_mtu = (openib_btl->hca->mtu < rem_mtu) ?
openib_btl->hca->mtu : rem_mtu;
if (mca_btl_openib_component.verbose) {
BTL_OUTPUT(("Set MTU to IBV value %d (%s bytes)", attr->path_mtu,
(attr->path_mtu == IBV_MTU_256) ? "256" :
(attr->path_mtu == IBV_MTU_512) ? "512" :
(attr->path_mtu == IBV_MTU_1024) ? "1024" :
(attr->path_mtu == IBV_MTU_2048) ? "2048" :
(attr->path_mtu == IBV_MTU_4096) ? "4096" :
"unknown (!)"));
}
attr->dest_qp_num = rem_qp_num;
attr->rq_psn = rem_psn;
attr->max_dest_rd_atomic = mca_btl_openib_component.ib_max_rdma_dst_ops;
attr->min_rnr_timer = mca_btl_openib_component.ib_min_rnr_timer;
attr->ah_attr.is_global = 0;
attr->ah_attr.dlid = rem_lid;
attr->ah_attr.sl = mca_btl_openib_component.ib_service_level;
attr->ah_attr.src_path_bits = openib_btl->src_path_bits;
attr->ah_attr.port_num = port_num;
attr->ah_attr.static_rate = mca_btl_openib_component.ib_static_rate;
if(ibv_modify_qp(qp, attr,
IBV_QP_STATE |
IBV_QP_AV |
IBV_QP_PATH_MTU |
IBV_QP_DEST_QPN |
IBV_QP_RQ_PSN |
IBV_QP_MAX_DEST_RD_ATOMIC |
IBV_QP_MIN_RNR_TIMER)) {
BTL_ERROR(("error modifing QP to RTR errno says %s", strerror(errno)));
return OMPI_ERROR;
}
attr->qp_state = IBV_QPS_RTS;
attr->timeout = mca_btl_openib_component.ib_timeout;
attr->retry_cnt = mca_btl_openib_component.ib_retry_count;
attr->rnr_retry = mca_btl_openib_component.ib_rnr_retry;
attr->sq_psn = lcl_psn;
attr->max_rd_atomic = mca_btl_openib_component.ib_max_rdma_dst_ops;
if (ibv_modify_qp(qp, attr,
IBV_QP_STATE |
IBV_QP_TIMEOUT |
IBV_QP_RETRY_CNT |
IBV_QP_RNR_RETRY |
IBV_QP_SQ_PSN |
IBV_QP_MAX_QP_RD_ATOMIC)) {
BTL_ERROR(("error modifying QP to RTS errno says %s", strerror(errno)));
return OMPI_ERROR;
}
return OMPI_SUCCESS;
}
/**
* Return control fragment.
*/
static void mca_btl_openib_endpoint_credits(
mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
struct mca_btl_base_descriptor_t* descriptor,
int status)
{
int32_t credits, prio;
if((void*)descriptor == (void*)endpoint->credit_frag[BTL_OPENIB_LP_QP])
prio = BTL_OPENIB_LP_QP;
else
prio = BTL_OPENIB_HP_QP;
/* we don't acquire a wqe or token for credit message - so decrement */
OPAL_THREAD_ADD32(&endpoint->sd_wqe[prio],-1);
/* check to see if there are addditional credits to return */
if((credits = OPAL_THREAD_ADD32(&endpoint->sd_credits[prio],-1)) > 0) {
OPAL_THREAD_ADD32(&endpoint->sd_credits[prio], -credits);
if(btl_openib_check_send_credits(endpoint, prio)) {
mca_btl_openib_endpoint_send_credits(endpoint, prio);
}
}
}
/**
* Return credits to peer
*/
void mca_btl_openib_endpoint_send_credits(mca_btl_openib_endpoint_t* endpoint,
const int prio)
{
mca_btl_openib_module_t* openib_btl = endpoint->endpoint_btl;
mca_btl_openib_frag_t* frag;
struct ibv_send_wr* bad_wr;
mca_btl_openib_rdma_credits_header_t *credits_hdr;
frag = endpoint->credit_frag[prio];
credits_hdr =
(mca_btl_openib_rdma_credits_header_t*)frag->segment.seg_addr.pval;
frag->base.des_cbfunc = mca_btl_openib_endpoint_credits;
frag->base.des_cbdata = NULL;
frag->endpoint = endpoint;
frag->hdr->tag = MCA_BTL_TAG_BTL;
/* send credits for high/low prios */
if(endpoint->rd_credits[prio] > 0) {
frag->hdr->credits = endpoint->rd_credits[prio];
OPAL_THREAD_ADD32(&endpoint->rd_credits[prio], -frag->hdr->credits);
} else {
frag->hdr->credits = 0;
}
/* send eager RDMA credits only for high prio */
if(BTL_OPENIB_HP_QP == prio && endpoint->eager_rdma_local.credits > 0) {
credits_hdr->rdma_credits = endpoint->eager_rdma_local.credits;
OPAL_THREAD_ADD32(&endpoint->eager_rdma_local.credits,
-credits_hdr->rdma_credits);
} else {
credits_hdr->rdma_credits = 0;
}
credits_hdr->control.type = MCA_BTL_OPENIB_CONTROL_CREDITS;
if(mca_btl_openib_component.use_srq) {
frag->wr_desc.sr_desc.opcode = IBV_WR_SEND_WITH_IMM;
frag->wr_desc.sr_desc.imm_data = endpoint->rem_info.rem_index;
} else {
frag->wr_desc.sr_desc.opcode = IBV_WR_SEND;
}
frag->sg_entry.length = sizeof(mca_btl_openib_header_t) +
sizeof(mca_btl_openib_rdma_credits_header_t);
frag->sg_entry.addr = (unsigned long) frag->hdr;
if(frag->sg_entry.length <= openib_btl->ib_inline_max) {
frag->wr_desc.sr_desc.send_flags = IBV_SEND_INLINE | IBV_SEND_SIGNALED;
} else {
frag->wr_desc.sr_desc.send_flags = IBV_SEND_SIGNALED;
}
/* just do it all, regardless of eager rdma or not.. */
if(endpoint->nbo) {
BTL_OPENIB_HEADER_HTON((*frag->hdr));
BTL_OPENIB_RDMA_CREDITS_HEADER_HTON((*credits_hdr));
}
if(ibv_post_send(endpoint->lcl_qp[prio], &frag->wr_desc.sr_desc, &bad_wr)) {
if(endpoint->nbo) {
BTL_OPENIB_HEADER_NTOH((*frag->hdr));
BTL_OPENIB_RDMA_CREDITS_HEADER_NTOH((*credits_hdr));
}
OPAL_THREAD_ADD32(&endpoint->sd_credits[prio], -1);
OPAL_THREAD_ADD32(&endpoint->rd_credits[prio], frag->hdr->credits);
OPAL_THREAD_ADD32(&endpoint->eager_rdma_local.credits, credits_hdr->rdma_credits);
BTL_ERROR(("error posting send request errno %d says %s",
strerror(errno)));
}
}
static void mca_btl_openib_endpoint_eager_rdma(
mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
struct mca_btl_base_descriptor_t* descriptor,
int status)
{
MCA_BTL_IB_FRAG_RETURN(((mca_btl_openib_module_t*)btl),
((mca_btl_openib_frag_t*)descriptor));
}
static int mca_btl_openib_endpoint_send_eager_rdma(
mca_btl_base_endpoint_t* endpoint)
{
mca_btl_openib_module_t* openib_btl = endpoint->endpoint_btl;
mca_btl_openib_eager_rdma_header_t *rdma_hdr;
mca_btl_openib_frag_t* frag;
int rc;
MCA_BTL_IB_FRAG_ALLOC_CREDIT_WAIT(openib_btl, frag, rc);
if(NULL == frag) {
return -1;
}
frag->base.des_cbfunc = mca_btl_openib_endpoint_eager_rdma;
frag->base.des_cbdata = NULL;
frag->endpoint = endpoint;
frag->base.des_flags |= MCA_BTL_DES_FLAGS_PRIORITY;
frag->hdr->tag = MCA_BTL_TAG_BTL;
rdma_hdr = (mca_btl_openib_eager_rdma_header_t*)frag->segment.seg_addr.pval;
rdma_hdr->control.type = MCA_BTL_OPENIB_CONTROL_RDMA;
rdma_hdr->rkey = endpoint->eager_rdma_local.reg->mr->rkey;
rdma_hdr->rdma_start.lval = ompi_ptr_ptol(endpoint->eager_rdma_local.base.pval);
BTL_VERBOSE(("sending rkey %lu, rdma_start.lval %llu, pval %p, ival %u type %d and sizeof(rdma_hdr) %d\n",
rdma_hdr->rkey,
rdma_hdr->rdma_start.lval,
rdma_hdr->rdma_start.pval,
rdma_hdr->rdma_start.ival,
rdma_hdr->control.type,
sizeof(mca_btl_openib_eager_rdma_header_t)
));
frag->segment.seg_len = sizeof(mca_btl_openib_eager_rdma_header_t);
if(endpoint->nbo) {
BTL_OPENIB_EAGER_RDMA_CONTROL_HEADER_HTON((*rdma_hdr));
BTL_VERBOSE(("after HTON: sending rkey %lu, rdma_start.lval %llu, pval %p, ival %u\n",
rdma_hdr->rkey,
rdma_hdr->rdma_start.lval,
rdma_hdr->rdma_start.pval,
rdma_hdr->rdma_start.ival
));
}
if (mca_btl_openib_endpoint_send(endpoint, frag) != OMPI_SUCCESS) {
MCA_BTL_IB_FRAG_RETURN(openib_btl, frag);
BTL_ERROR(("Error sending RDMA buffer", strerror(errno)));
return -1;
}
return 0;
}
/* create RDMA buffer for eager messages */
void mca_btl_openib_endpoint_connect_eager_rdma(
mca_btl_openib_endpoint_t* endpoint)
{
mca_btl_openib_module_t* openib_btl = endpoint->endpoint_btl;
char *buf;
mca_btl_openib_recv_frag_eager_t *headers_buf;
unsigned int i;
orte_std_cntr_t index;
/* Set local rdma pointer to 1 temporarily so other threads will not try
* to enter the function */
if(!opal_atomic_cmpset_ptr(&endpoint->eager_rdma_local.base.pval, NULL,
(void*)1))
return;
headers_buf = (mca_btl_openib_recv_frag_eager_t*)
malloc(sizeof(mca_btl_openib_recv_frag_eager_t) *
mca_btl_openib_component.eager_rdma_num);
if(NULL == headers_buf)
goto unlock_rdma_local;
buf = openib_btl->super.btl_mpool->mpool_alloc(openib_btl->super.btl_mpool,
openib_btl->eager_rdma_frag_size *
mca_btl_openib_component.eager_rdma_num,
mca_btl_openib_component.buffer_alignment,
MCA_MPOOL_FLAGS_CACHE_BYPASS,
(mca_mpool_base_registration_t**)&endpoint->eager_rdma_local.reg);
if(!buf)
goto free_headers_buf;
buf = buf + openib_btl->eager_rdma_frag_size -
sizeof(mca_btl_openib_footer_t) - openib_btl->super.btl_eager_limit -
sizeof(mca_btl_openib_header_t);
for(i = 0; i < mca_btl_openib_component.eager_rdma_num; i++) {
ompi_free_list_item_t *item;
item = (ompi_free_list_item_t*)&headers_buf[i];
item->registration = (void*)endpoint->eager_rdma_local.reg;
item->ptr = buf + i * openib_btl->eager_rdma_frag_size;
OBJ_CONSTRUCT(item, mca_btl_openib_recv_frag_eager_t);
((mca_btl_openib_frag_t*)item)->endpoint = endpoint;
((mca_btl_openib_frag_t*)item)->type = MCA_BTL_OPENIB_FRAG_EAGER_RDMA;
}
endpoint->eager_rdma_local.frags = headers_buf;
/* set local rdma pointer to real value */
opal_atomic_cmpset_ptr(&endpoint->eager_rdma_local.base.pval, (void*)1,
buf);
if(mca_btl_openib_endpoint_send_eager_rdma(endpoint) == 0) {
/* This can never fail because max number of entries allocated
* at init time */
orte_pointer_array_add(&index, openib_btl->eager_rdma_buffers,
endpoint);
/* from this point progress function starts to poll new buffer */
OPAL_THREAD_ADD32(&openib_btl->eager_rdma_buffers_count, 1);
return;
}
openib_btl->super.btl_mpool->mpool_free(openib_btl->super.btl_mpool,
buf, (mca_mpool_base_registration_t*)endpoint->eager_rdma_local.reg);
free_headers_buf:
free(headers_buf);
unlock_rdma_local:
/* set local rdma pointer back to zero. Will retry later */
opal_atomic_cmpset_ptr(&endpoint->eager_rdma_local.base.pval,
endpoint->eager_rdma_local.base.pval, NULL);
endpoint->eager_rdma_local.frags = NULL;
}
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