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openmpi/ompi/mca/btl/openib/btl_openib.c
Galen Shipman f12bbe0591 Handle different subnets correctly and multiple nic endpoint negotiation 
This is somewhat limited currently for expample,  if you have 3 ports on Node A and 5 ports
on Node B then the peers will use 3 ports to communicate with each other. 
This is on a subnet basis, so for any pair of nodes we take the
intersection of the available ports within a subnet.

We use subnets to determine reachability for lazy connection establishment. So
if Node A and Node B each have two HCA's (on seperate networks) then the
subnet's must be distinct, otherwise we will try to wire up HCA's on seperate
networks.  

This commit was SVN r12978.
2007-01-03 22:35:41 +00:00

865 строки
31 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 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <string.h>
#include <inttypes.h>
#include "opal/util/output.h"
#include "opal/util/if.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/mca/btl/btl.h"
#include "ompi/mca/btl/base/btl_base_error.h"
#include "btl_openib.h"
#include "btl_openib_frag.h"
#include "btl_openib_proc.h"
#include "btl_openib_endpoint.h"
#include "ompi/datatype/convertor.h"
#include "ompi/datatype/datatype.h"
#include "ompi/mca/mpool/base/base.h"
#include "ompi/mca/mpool/mpool.h"
#include "ompi/mca/mpool/rdma/mpool_rdma.h"
#include <errno.h>
#include <string.h>
#include <math.h>
#include <inttypes.h>
mca_btl_openib_module_t mca_btl_openib_module = {
{
&mca_btl_openib_component.super,
0, /* max size of first fragment */
0, /* min send fragment size */
0, /* max send fragment size */
0, /* min rdma fragment size */
0, /* max rdma fragment size */
0, /* exclusivity */
0, /* latency */
0, /* bandwidth */
0, /* TODO this should be PUT btl flags */
mca_btl_openib_add_procs,
mca_btl_openib_del_procs,
mca_btl_openib_register,
mca_btl_openib_finalize,
/* we need alloc free, pack */
mca_btl_openib_alloc,
mca_btl_openib_free,
mca_btl_openib_prepare_src,
mca_btl_openib_prepare_dst,
mca_btl_openib_send,
mca_btl_openib_put,
mca_btl_openib_get,
mca_btl_base_dump,
NULL, /* mpool */
mca_btl_openib_register_error_cb /* error call back registration */
}
};
int mca_btl_openib_size_queues( struct mca_btl_openib_module_t* openib_btl, size_t nprocs);
/*
* add a proc to this btl module
* creates an endpoint that is setup on the
* first send to the endpoint
*/
int mca_btl_openib_add_procs(
struct mca_btl_base_module_t* btl,
size_t nprocs,
struct ompi_proc_t **ompi_procs,
struct mca_btl_base_endpoint_t** peers,
ompi_bitmap_t* reachable)
{
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*)btl;
int i,j, rc;
int remote_subnets;
int local_subnets;
int btl_rank;
for(i = 0; i < (int) nprocs; i++) {
struct ompi_proc_t* ompi_proc = ompi_procs[i];
mca_btl_openib_proc_t* ib_proc;
mca_btl_base_endpoint_t* endpoint;
if(NULL == (ib_proc = mca_btl_openib_proc_create(ompi_proc))) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
remote_subnets = 0;
/* check if the remote proc has a reachable subnet first */
BTL_VERBOSE(("got %d port_infos \n", ib_proc->proc_port_count));
for(j = 0; j < (int) ib_proc->proc_port_count; j++){
BTL_VERBOSE(("got a subnet %016x\n",
ib_proc->proc_ports[j].subnet));
if(ib_proc->proc_ports[j].subnet ==
openib_btl->port_info.subnet) {
BTL_VERBOSE(("Got a matching subnet!\n"));
remote_subnets++;
}
}
if(!remote_subnets) {
/* no use trying to communicate with this endpointlater */
BTL_VERBOSE(("No matching subnet was found, moving on.. \n"));
continue;
}
local_subnets = 0;
for(j=0; j < mca_btl_openib_component.ib_num_btls; j++){
if(mca_btl_openib_component.openib_btls[j].port_info.subnet
== openib_btl->port_info.subnet) {
local_subnets++;
}
if(openib_btl == &(mca_btl_openib_component.openib_btls[j])) {
btl_rank = j;
}
}
#if 0
num_endpoints = remote_subnets / local_subnets +
(btl_rank < (remote_subnets / local_subnets)) ? 1:0;
#endif
if(remote_subnets < local_subnets &&
btl_rank >= remote_subnets) {
BTL_VERBOSE(("Not enough remote subnets, moving on.. \n"));
continue;
}
OPAL_THREAD_LOCK(&ib_proc->proc_lock);
/* The btl_proc datastructure is shared by all IB PTL
* instances that are trying to reach this destination.
* Cache the peer instance on the btl_proc.
*/
endpoint = OBJ_NEW(mca_btl_openib_endpoint_t);
if(NULL == endpoint) {
OPAL_THREAD_UNLOCK(&ib_proc->proc_lock);
return OMPI_ERR_OUT_OF_RESOURCE;
}
endpoint->endpoint_btl = openib_btl;
endpoint->subnet = openib_btl->port_info.subnet;
rc = mca_btl_openib_proc_insert(ib_proc, endpoint);
if(rc != OMPI_SUCCESS) {
OBJ_RELEASE(endpoint);
OPAL_THREAD_UNLOCK(&ib_proc->proc_lock);
continue;
}
orte_pointer_array_add((orte_std_cntr_t*)&endpoint->index,
openib_btl->endpoints, (void*)endpoint);
ompi_bitmap_set_bit(reachable, i);
OPAL_THREAD_UNLOCK(&ib_proc->proc_lock);
peers[i] = endpoint;
}
return mca_btl_openib_size_queues(openib_btl, nprocs);
}
int mca_btl_openib_size_queues( struct mca_btl_openib_module_t* openib_btl, size_t nprocs)
{
int min_cq_size;
int first_time = (0 == openib_btl->num_peers);
int rc;
openib_btl->num_peers += nprocs;
if(mca_btl_openib_component.use_srq) {
openib_btl->rd_num = mca_btl_openib_component.rd_num + log2(nprocs) * mca_btl_openib_component.srq_rd_per_peer;
if(openib_btl->rd_num > mca_btl_openib_component.srq_rd_max)
openib_btl->rd_num = mca_btl_openib_component.srq_rd_max;
openib_btl->rd_low = openib_btl->rd_num - 1;
min_cq_size = openib_btl->rd_num * 2 * openib_btl->num_peers;
if(!first_time) {
struct ibv_srq_attr srq_attr;
srq_attr.max_wr = openib_btl->rd_num;
rc = ibv_modify_srq(openib_btl->srq[BTL_OPENIB_HP_QP],
&srq_attr, IBV_SRQ_MAX_WR);
if(rc) {
BTL_ERROR(("cannot resize high priority shared receive queue, error: %d", rc));
return OMPI_ERROR;
}
rc = ibv_modify_srq(openib_btl->srq[BTL_OPENIB_LP_QP],
&srq_attr, IBV_SRQ_MAX_WR);
if(rc) {
BTL_ERROR(("cannot resize low priority shared receive queue, error: %d", rc));
return OMPI_ERROR;
}
}
} else
{
min_cq_size = ( mca_btl_openib_component.rd_num > (int32_t) mca_btl_openib_component.eager_rdma_num ?
mca_btl_openib_component.rd_num : (int32_t) mca_btl_openib_component.eager_rdma_num ) *
2 * openib_btl->num_peers;
}
if(min_cq_size > (int32_t) mca_btl_openib_component.ib_cq_size) {
mca_btl_openib_component.ib_cq_size = min_cq_size > openib_btl->hca->ib_dev_attr.max_cq ?
openib_btl->hca->ib_dev_attr.max_cq : min_cq_size;
#if OMPI_MCA_BTL_OPENIB_HAVE_RESIZE_CQ
if(!first_time) {
rc = ibv_resize_cq(openib_btl->ib_cq[BTL_OPENIB_LP_QP], mca_btl_openib_component.ib_cq_size);
if(rc) {
BTL_ERROR(("cannot resize low priority completion queue, error: %d", rc));
return OMPI_ERROR;
}
rc = ibv_resize_cq(openib_btl->ib_cq[BTL_OPENIB_HP_QP],
mca_btl_openib_component.ib_cq_size);
if(rc) {
BTL_ERROR(("cannot resize high priority completion queue, error: %d", rc));
return OMPI_ERROR;
}
}
#endif
}
if(first_time) {
/* never been here before, setup cq and srq */
mca_btl_openib_component.ib_cq_size = (int) mca_btl_openib_component.ib_cq_size >
openib_btl->hca->ib_dev_attr.max_cq ?
openib_btl->hca->ib_dev_attr.max_cq :
(int) mca_btl_openib_component.ib_cq_size;
return mca_btl_openib_create_cq_srq(openib_btl);
}
return OMPI_SUCCESS;
}
/*
* delete the proc as reachable from this btl module
*/
int mca_btl_openib_del_procs(struct mca_btl_base_module_t* btl,
size_t nprocs,
struct ompi_proc_t **procs,
struct mca_btl_base_endpoint_t ** peers)
{
BTL_DEBUG(("TODO\n"));
return OMPI_SUCCESS;
}
/*
*Register callback function to support send/recv semantics
*/
int mca_btl_openib_register(
struct mca_btl_base_module_t* btl,
mca_btl_base_tag_t tag,
mca_btl_base_module_recv_cb_fn_t cbfunc,
void* cbdata)
{
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*) btl;
OPAL_THREAD_LOCK(&openib_btl->ib_lock);
openib_btl->ib_reg[tag].cbfunc = cbfunc;
openib_btl->ib_reg[tag].cbdata = cbdata;
OPAL_THREAD_UNLOCK(&openib_btl->ib_lock);
return OMPI_SUCCESS;
}
/*
*Register callback function for error handling..
*/
int mca_btl_openib_register_error_cb(
struct mca_btl_base_module_t* btl,
mca_btl_base_module_error_cb_fn_t cbfunc)
{
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*) btl;
openib_btl->error_cb = cbfunc; /* stash for later */
return OMPI_SUCCESS;
}
/**
* Allocate a segment.
*
* @param btl (IN) BTL module
* @param size (IN) Request segment size.
*
* When allocating a segment we pull a pre-alllocated segment
* from one of two free lists, an eager list and a max list
*/
mca_btl_base_descriptor_t* mca_btl_openib_alloc(
struct mca_btl_base_module_t* btl,
size_t size)
{
mca_btl_openib_frag_t* frag = NULL;
mca_btl_openib_module_t* openib_btl;
int rc;
openib_btl = (mca_btl_openib_module_t*) btl;
if(size <= mca_btl_openib_component.eager_limit){
MCA_BTL_IB_FRAG_ALLOC_EAGER(btl, frag, rc);
} else if(size <= mca_btl_openib_component.max_send_size) {
MCA_BTL_IB_FRAG_ALLOC_MAX(btl, frag, rc);
}
if(NULL == frag)
return NULL;
frag->segment.seg_len = size <= openib_btl->super.btl_eager_limit ? size : openib_btl->super.btl_eager_limit;
frag->base.des_flags = 0;
return (mca_btl_base_descriptor_t*)frag;
}
/**
* Return a segment
*
* Return the segment to the appropriate
* preallocated segment list
*/
int mca_btl_openib_free(
struct mca_btl_base_module_t* btl,
mca_btl_base_descriptor_t* des)
{
mca_btl_openib_frag_t* frag = (mca_btl_openib_frag_t*)des;
if(MCA_BTL_OPENIB_FRAG_FRAG == frag->type && frag->registration != NULL) {
btl->btl_mpool->mpool_deregister(btl->btl_mpool,
(mca_mpool_base_registration_t*)
frag->registration);
frag->registration = NULL;
}
MCA_BTL_IB_FRAG_RETURN(((mca_btl_openib_module_t*) btl), frag);
return OMPI_SUCCESS;
}
/**
* register user buffer or pack
* data into pre-registered buffer and return a
* descriptor that can be
* used for send/put.
*
* @param btl (IN) BTL module
* @param peer (IN) BTL peer addressing
*
* prepare source's behavior depends on the following:
* Has a valid memory registration been passed to prepare_src?
* if so we attempt to use the pre-registred user-buffer, if the memory registration
* is to small (only a portion of the user buffer) then we must reregister the user buffer
* Has the user requested the memory to be left pinned?
* if so we insert the memory registration into a memory tree for later lookup, we
* may also remove a previous registration if a MRU (most recently used) list of
* registions is full, this prevents resources from being exhausted.
* Is the requested size larger than the btl's max send size?
* if so and we aren't asked to leave the registration pinned than we register the memory if
* the users buffer is contiguous
* Otherwise we choose from two free lists of pre-registered memory in which to pack the data into.
*
*/
mca_btl_base_descriptor_t* mca_btl_openib_prepare_src(
struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
mca_mpool_base_registration_t* registration,
struct ompi_convertor_t* convertor,
size_t reserve,
size_t* size
)
{
mca_btl_openib_module_t *openib_btl;
mca_btl_openib_frag_t *frag = NULL;
mca_btl_openib_reg_t *openib_reg;
struct iovec iov;
uint32_t iov_count = 1;
size_t max_data = *size;
int rc;
openib_btl = (mca_btl_openib_module_t*)btl;
if(ompi_convertor_need_buffers(convertor) == false && 0 == reserve) {
if(registration != NULL || max_data > btl->btl_max_send_size) {
MCA_BTL_IB_FRAG_ALLOC_FRAG(btl, frag, rc);
if(NULL == frag) {
return NULL;
}
iov.iov_len = max_data;
iov.iov_base = NULL;
ompi_convertor_pack(convertor, &iov, &iov_count, &max_data);
*size = max_data;
if(NULL == registration) {
rc = btl->btl_mpool->mpool_register(btl->btl_mpool,
iov.iov_base, max_data, 0, &registration);
if(OMPI_SUCCESS != rc || NULL == registration) {
MCA_BTL_IB_FRAG_RETURN(openib_btl, frag);
return NULL;
}
/* keep track of the registration we did */
frag->registration = (mca_btl_openib_reg_t*)registration;
}
openib_reg = (mca_btl_openib_reg_t*)registration;
frag->base.des_flags = 0;
frag->base.des_src = &frag->segment;
frag->base.des_src_cnt = 1;
frag->base.des_dst = NULL;
frag->base.des_dst_cnt = 0;
frag->base.des_flags = 0;
frag->sg_entry.length = max_data;
frag->sg_entry.lkey = openib_reg->mr->lkey;
frag->sg_entry.addr = (unsigned long)iov.iov_base;
frag->segment.seg_len = max_data;
OMPI_PTR_SET_PVAL(frag->segment.seg_addr, iov.iov_base);
frag->segment.seg_key.key32[0] = (uint32_t)frag->sg_entry.lkey;
BTL_VERBOSE(("frag->sg_entry.lkey = %lu .addr = %llu "
"frag->segment.seg_key.key32[0] = %lu",
frag->sg_entry.lkey, frag->sg_entry.addr,
frag->segment.seg_key.key32[0]));
return &frag->base;
}
}
if(max_data + reserve <= btl->btl_eager_limit) {
/* the data is small enough to fit in the eager frag and
* memory is not prepinned */
MCA_BTL_IB_FRAG_ALLOC_EAGER(btl, frag, rc);
}
if(NULL == frag) {
/* the data doesn't fit into eager frag or eger frag is
* not available */
MCA_BTL_IB_FRAG_ALLOC_MAX(btl, frag, rc);
if(NULL == frag) {
return NULL;
}
if(max_data + reserve > btl->btl_max_send_size) {
max_data = btl->btl_max_send_size - reserve;
}
}
iov.iov_len = max_data;
iov.iov_base = (unsigned char*) OMPI_PTR_GET_PVAL(frag->segment.seg_addr) + reserve;
rc = ompi_convertor_pack(convertor, &iov, &iov_count, &max_data);
if(rc < 0) {
MCA_BTL_IB_FRAG_RETURN(openib_btl, frag);
return NULL;
}
*size = max_data;
frag->segment.seg_len = max_data + reserve;
frag->segment.seg_key.key32[0] = (uint32_t)frag->sg_entry.lkey;
frag->base.des_src = &frag->segment;
frag->base.des_src_cnt = 1;
frag->base.des_dst = NULL;
frag->base.des_dst_cnt = 0;
frag->base.des_flags = 0;
return &frag->base;
}
/**
* Prepare the dst buffer
*
* @param btl (IN) BTL module
* @param peer (IN) BTL peer addressing
* prepare dest's behavior depends on the following:
* Has a valid memory registration been passed to prepare_src?
* if so we attempt to use the pre-registred user-buffer, if the memory registration
* is to small (only a portion of the user buffer) then we must reregister the user buffer
* Has the user requested the memory to be left pinned?
* if so we insert the memory registration into a memory tree for later lookup, we
* may also remove a previous registration if a MRU (most recently used) list of
* registions is full, this prevents resources from being exhausted.
*/
mca_btl_base_descriptor_t* mca_btl_openib_prepare_dst(
struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
mca_mpool_base_registration_t* registration,
struct ompi_convertor_t* convertor,
size_t reserve,
size_t* size)
{
mca_btl_openib_module_t *openib_btl;
mca_btl_openib_frag_t *frag;
mca_btl_openib_reg_t *openib_reg;
int rc;
ptrdiff_t lb;
openib_btl = (mca_btl_openib_module_t*)btl;
MCA_BTL_IB_FRAG_ALLOC_FRAG(btl, frag, rc);
if(NULL == frag) {
return NULL;
}
ompi_ddt_type_lb(convertor->pDesc, &lb);
OMPI_PTR_SET_PVAL(frag->segment.seg_addr,
convertor->pBaseBuf + lb + convertor->bConverted);
if(NULL == registration){
/* we didn't get a memory registration passed in, so we have to
* register the region ourselves
*/
rc = btl->btl_mpool->mpool_register(btl->btl_mpool,
OMPI_PTR_GET_PVAL(frag->segment.seg_addr), *size, 0, &registration);
if(OMPI_SUCCESS != rc || NULL == registration) {
MCA_BTL_IB_FRAG_RETURN(openib_btl, frag);
return NULL;
}
/* keep track of the registration we did */
frag->registration = (mca_btl_openib_reg_t*)registration;
}
openib_reg = (mca_btl_openib_reg_t*)registration;
frag->sg_entry.length = *size;
frag->sg_entry.lkey = openib_reg->mr->lkey;
frag->sg_entry.addr = (unsigned long) OMPI_PTR_GET_PVAL(frag->segment.seg_addr);
frag->segment.seg_len = *size;
frag->segment.seg_key.key32[0] = openib_reg->mr->rkey;
frag->base.des_dst = &frag->segment;
frag->base.des_dst_cnt = 1;
frag->base.des_src = NULL;
frag->base.des_src_cnt = 0;
frag->base.des_flags = 0;
BTL_VERBOSE(("frag->sg_entry.lkey = %lu .addr = %llu "
"frag->segment.seg_key.key32[0] = %lu",
frag->sg_entry.lkey, frag->sg_entry.addr,
frag->segment.seg_key.key32[0]));
return &frag->base;
}
int mca_btl_openib_finalize(struct mca_btl_base_module_t* btl)
{
mca_btl_openib_module_t* openib_btl;
openib_btl = (mca_btl_openib_module_t*) btl;
#if 0
if(openib_btl->send_free_eager.fl_num_allocated !=
openib_btl->send_free_eager.super.opal_list_length){
opal_output(0, "btl ib send_free_eager frags: %d allocated %d returned \n",
openib_btl->send_free_eager.fl_num_allocated,
openib_btl->send_free_eager.super.opal_list_length);
}
if(openib_btl->send_free_max.fl_num_allocated !=
openib_btl->send_free_max.super.opal_list_length){
opal_output(0, "btl ib send_free_max frags: %d allocated %d returned \n",
openib_btl->send_free_max.fl_num_allocated,
openib_btl->send_free_max.super.opal_list_length);
}
if(openib_btl->send_free_frag.fl_num_allocated !=
openib_btl->send_free_frag.super.opal_list_length){
opal_output(0, "btl ib send_free_frag frags: %d allocated %d returned \n",
openib_btl->send_free_frag.fl_num_allocated,
openib_btl->send_free_frag.super.opal_list_length);
}
if(openib_btl->recv_free_eager.fl_num_allocated !=
openib_btl->recv_free_eager.super.opal_list_length){
opal_output(0, "btl ib recv_free_eager frags: %d allocated %d returned \n",
openib_btl->recv_free_eager.fl_num_allocated,
openib_btl->recv_free_eager.super.opal_list_length);
}
if(openib_btl->recv_free_max.fl_num_allocated !=
openib_btl->recv_free_max.super.opal_list_length){
opal_output(0, "btl ib recv_free_max frags: %d allocated %d returned \n",
openib_btl->recv_free_max.fl_num_allocated,
openib_btl->recv_free_max.super.opal_list_length);
}
#endif
#if OMPI_ENABLE_PROGRESS_THREADS == 1
if(openib_btl->hca->progress) {
openib_btl->hca->progress = false;
if (pthread_cancel(openib_btl->hca->thread.t_handle))
BTL_ERROR(("Failed to cancel OpenIB progress thread"));
opal_thread_join(&openib_btl->hca->thread, NULL);
}
#endif
return OMPI_SUCCESS;
}
/*
* Initiate a send.
*/
int mca_btl_openib_send(
struct mca_btl_base_module_t* btl,
struct mca_btl_base_endpoint_t* endpoint,
struct mca_btl_base_descriptor_t* descriptor,
mca_btl_base_tag_t tag)
{
mca_btl_openib_frag_t* frag = (mca_btl_openib_frag_t*)descriptor;
frag->endpoint = endpoint;
frag->hdr->tag = tag;
frag->wr_desc.sr_desc.opcode = IBV_WR_SEND;
return mca_btl_openib_endpoint_send(endpoint, frag);
}
/*
* RDMA WRITE local buffer to remote buffer address.
*/
int mca_btl_openib_put( mca_btl_base_module_t* btl,
mca_btl_base_endpoint_t* endpoint,
mca_btl_base_descriptor_t* descriptor)
{
int rc;
struct ibv_send_wr* bad_wr;
mca_btl_openib_frag_t* frag = (mca_btl_openib_frag_t*) descriptor;
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*) btl;
/* setup for queued requests */
frag->endpoint = endpoint;
frag->wr_desc.sr_desc.opcode = IBV_WR_RDMA_WRITE;
/* check for a send wqe */
if (OPAL_THREAD_ADD32(&endpoint->sd_wqe[BTL_OPENIB_LP_QP],-1) < 0) {
OPAL_THREAD_ADD32(&endpoint->sd_wqe[BTL_OPENIB_LP_QP],1);
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
opal_list_append(&endpoint->pending_put_frags, (opal_list_item_t *)frag);
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
return OMPI_SUCCESS;
/* post descriptor */
} else {
frag->wr_desc.sr_desc.send_flags = IBV_SEND_SIGNALED;
frag->wr_desc.sr_desc.wr.rdma.remote_addr = (unsigned long) OMPI_PTR_GET_PVAL(frag->base.des_dst->seg_addr);
frag->wr_desc.sr_desc.wr.rdma.rkey = frag->base.des_dst->seg_key.key32[0];
frag->sg_entry.addr = (unsigned long) OMPI_PTR_GET_PVAL(frag->base.des_src->seg_addr);
frag->sg_entry.length = frag->base.des_src->seg_len;
if(ibv_post_send(endpoint->lcl_qp[BTL_OPENIB_LP_QP],
&frag->wr_desc.sr_desc,
&bad_wr)){
rc = OMPI_ERROR;
} else {
rc = OMPI_SUCCESS;
}
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 rc;
}
/*
* RDMA READ remote buffer to local buffer address.
*/
int mca_btl_openib_get( mca_btl_base_module_t* btl,
mca_btl_base_endpoint_t* endpoint,
mca_btl_base_descriptor_t* descriptor)
{
int rc;
struct ibv_send_wr* bad_wr;
mca_btl_openib_frag_t* frag = (mca_btl_openib_frag_t*) descriptor;
mca_btl_openib_module_t* openib_btl = (mca_btl_openib_module_t*) btl;
frag->endpoint = endpoint;
frag->wr_desc.sr_desc.opcode = IBV_WR_RDMA_READ;
/* check for a send wqe */
if (OPAL_THREAD_ADD32(&endpoint->sd_wqe[BTL_OPENIB_LP_QP],-1) < 0) {
OPAL_THREAD_ADD32(&endpoint->sd_wqe[BTL_OPENIB_LP_QP],1);
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
opal_list_append(&endpoint->pending_get_frags, (opal_list_item_t*)frag);
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
return OMPI_SUCCESS;
/* check for a get token */
} else if(OPAL_THREAD_ADD32(&endpoint->get_tokens,-1) < 0) {
OPAL_THREAD_ADD32(&endpoint->sd_wqe[BTL_OPENIB_LP_QP],1);
OPAL_THREAD_ADD32(&endpoint->get_tokens,1);
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
opal_list_append(&endpoint->pending_get_frags, (opal_list_item_t*)frag);
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
return OMPI_SUCCESS;
} else {
frag->wr_desc.sr_desc.send_flags = IBV_SEND_SIGNALED;
frag->wr_desc.sr_desc.wr.rdma.remote_addr = (unsigned long) OMPI_PTR_GET_PVAL(frag->base.des_src->seg_addr);
frag->wr_desc.sr_desc.wr.rdma.rkey = frag->base.des_src->seg_key.key32[0];
frag->sg_entry.addr = (unsigned long) OMPI_PTR_GET_PVAL(frag->base.des_dst->seg_addr);
frag->sg_entry.length = frag->base.des_dst->seg_len;
if(ibv_post_send(endpoint->lcl_qp[BTL_OPENIB_LP_QP],
&frag->wr_desc.sr_desc,
&bad_wr)){
BTL_ERROR(("error posting send request errno (%d) says %s", errno, strerror(errno)));
rc = ORTE_ERROR;
} else {
rc = ORTE_SUCCESS;
}
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 rc;
}
/*
* create both the high and low priority completion queues
* and the shared receive queue (if requested)
*/
int mca_btl_openib_create_cq_srq(mca_btl_openib_module_t *openib_btl)
{
/* Allocate Protection Domain */
openib_btl->poll_cq = false;
if(mca_btl_openib_component.use_srq) {
struct ibv_srq_init_attr attr;
attr.attr.max_wr = mca_btl_openib_component.srq_rd_max;
attr.attr.max_sge = mca_btl_openib_component.ib_sg_list_size;
openib_btl->srd_posted[BTL_OPENIB_HP_QP] = 0;
openib_btl->srd_posted[BTL_OPENIB_LP_QP] = 0;
openib_btl->srq[BTL_OPENIB_HP_QP] =
ibv_create_srq(openib_btl->hca->ib_pd, &attr);
if(NULL == openib_btl->srq[BTL_OPENIB_HP_QP]) {
BTL_ERROR(("error in ibv_create_srq\n"));
return OMPI_ERROR;
}
openib_btl->srq[BTL_OPENIB_LP_QP] =
ibv_create_srq(openib_btl->hca->ib_pd, &attr);
if(NULL == openib_btl->srq[BTL_OPENIB_LP_QP]) {
BTL_ERROR(("error in ibv_create_srq\n"));
return OMPI_ERROR;
}
} else {
openib_btl->srq[BTL_OPENIB_HP_QP] = NULL;
openib_btl->srq[BTL_OPENIB_LP_QP] = NULL;
}
/* Create the low and high priority queue pairs */
#if OMPI_ENABLE_PROGRESS_THREADS == 1
#if OMPI_MCA_BTL_OPENIB_IBV_CREATE_CQ_ARGS == 3
openib_btl->ib_cq[BTL_OPENIB_LP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, openib_btl->hca->ib_channel);
#else
openib_btl->ib_cq[BTL_OPENIB_LP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, openib_btl, openib_btl->hca->ib_channel, 0);
#endif
#else /* OMPI_ENABLE_PROGRESS_THREADS DISABLED */
#if OMPI_MCA_BTL_OPENIB_IBV_CREATE_CQ_ARGS == 3
openib_btl->ib_cq[BTL_OPENIB_LP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, NULL);
#else
openib_btl->ib_cq[BTL_OPENIB_LP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, NULL, NULL, 0);
#endif
#endif /* OMPI_ENABLE_PROGRESS_THREADS */
if(NULL == openib_btl->ib_cq[BTL_OPENIB_LP_QP]) {
BTL_ERROR(("error creating low priority cq for %s errno says %s\n",
ibv_get_device_name(openib_btl->hca->ib_dev),
strerror(errno)));
return OMPI_ERROR;
}
#if OMPI_ENABLE_PROGRESS_THREADS == 1
if(ibv_req_notify_cq(openib_btl->ib_cq[BTL_OPENIB_LP_QP], 0)) {
BTL_ERROR(("error requesting low priority cq notification for %s"
" errno says %s\n",
ibv_get_device_name(openib_btl->hca->ib_dev),
strerror(errno)));
return OMPI_ERROR;
}
#if OMPI_MCA_BTL_OPENIB_IBV_CREATE_CQ_ARGS == 3
openib_btl->ib_cq[BTL_OPENIB_HP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, openib_btl->hca->ib_channel);
#else
openib_btl->ib_cq[BTL_OPENIB_HP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, openib_btl, openib_btl->hca->ib_channel, 0);
#endif
#else /* OMPI_ENABLE_PROGRESS_THREADS DISABLED */
#if OMPI_MCA_BTL_OPENIB_IBV_CREATE_CQ_ARGS == 3
openib_btl->ib_cq[BTL_OPENIB_HP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, NULL);
#else
openib_btl->ib_cq[BTL_OPENIB_HP_QP] =
ibv_create_cq(openib_btl->hca->ib_dev_context,
mca_btl_openib_component.ib_cq_size, NULL, NULL, 0);
#endif
#endif /* OMPI_ENABLE_PROGRESS_THREADS */
if(NULL == openib_btl->ib_cq[BTL_OPENIB_HP_QP]) {
BTL_ERROR(("error creating high priority cq for %s errno says %s\n",
ibv_get_device_name(openib_btl->hca->ib_dev),
strerror(errno)));
return OMPI_ERROR;
}
#if OMPI_ENABLE_PROGRESS_THREADS == 1
if(ibv_req_notify_cq(openib_btl->ib_cq[BTL_OPENIB_HP_QP], 0)) {
BTL_ERROR(("error requesting high priority cq notification for %s"
" errno says %s\n",
ibv_get_device_name(openib_btl->hca->ib_dev),
strerror(errno)));
return OMPI_ERROR;
}
OPAL_THREAD_LOCK(&openib_btl->hca->hca_lock);
if (!openib_btl->hca->progress){
int rc;
openib_btl->hca->progress = true;
if(OPAL_SUCCESS != (rc = opal_thread_start(&openib_btl->hca->thread))) {
BTL_ERROR(("Unable to create progress thread, retval=%d", rc));
return rc;
}
}
OPAL_THREAD_UNLOCK(&openib_btl->hca->hca_lock);
#endif
return OMPI_SUCCESS;
}
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