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/*
* Copyright (c) 2013-2018 Intel, Inc. All rights reserved
*
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "mtl_ofi.h"
OMPI_DECLSPEC extern mca_mtl_ofi_component_t mca_mtl_ofi_component;
mca_mtl_ofi_module_t ompi_mtl_ofi = {
{
(int)((1ULL << MTL_OFI_CID_BIT_COUNT_1) - 1), /* max cid */
(int)((1ULL << (MTL_OFI_TAG_BIT_COUNT_1 - 1)) - 1) ,/* max tag value */
0, /* request reserve space */
0, /* flags */
ompi_mtl_ofi_add_procs,
ompi_mtl_ofi_del_procs,
ompi_mtl_ofi_finalize,
NULL,
NULL,
NULL,
NULL,
ompi_mtl_ofi_imrecv,
NULL,
ompi_mtl_ofi_cancel,
ompi_mtl_ofi_add_comm,
ompi_mtl_ofi_del_comm
},
0,
0,
NULL,
NULL
};
int
ompi_mtl_ofi_add_procs(struct mca_mtl_base_module_t *mtl,
size_t nprocs,
struct ompi_proc_t** procs)
{
int ret = OMPI_SUCCESS;
size_t i;
size_t size;
size_t namelen;
int count = 0;
char *ep_name = NULL;
char *ep_names = NULL;
fi_addr_t *fi_addrs = NULL;
mca_mtl_ofi_endpoint_t *endpoint = NULL;
int num_peers_limit = (1 << ompi_mtl_ofi.num_bits_source_rank) - 1;
namelen = ompi_mtl_ofi.epnamelen;
/* We cannot add more ranks than available tag bits */
if ((false == ompi_mtl_ofi.fi_cq_data) &&
OPAL_UNLIKELY(((int) (nprocs + ompi_mtl_ofi.num_peers) > num_peers_limit))) {
opal_output(0, "%s:%d: OFI provider: %s does not have enough bits for source rank in its tag.\n"
"Adding more ranks will result in undefined behaviour. Please enable\n"
"FI_REMOTE_CQ_DATA feature in the provider. For more info refer fi_cq(3).\n",
__FILE__, __LINE__, ompi_mtl_ofi.provider_name);
fflush(stderr);
ret = OMPI_ERROR;
goto bail;
}
/**
* Create array of EP names.
*/
ep_names = malloc(nprocs * namelen);
if (NULL == ep_names) {
ret = OMPI_ERROR;
goto bail;
}
/**
* Create array of fi_addrs.
*/
fi_addrs = malloc(nprocs * sizeof(fi_addr_t));
if (NULL == fi_addrs) {
ret = OMPI_ERROR;
goto bail;
}
/**
* Retrieve the processes' EP names from modex.
*/
for (i = 0; i < nprocs; ++i) {
OFI_COMPAT_MODEX_RECV(ret,
&mca_mtl_ofi_component.super.mtl_version,
procs[i],
(void**)&ep_name,
&size);
if (OMPI_SUCCESS != ret) {
opal_show_help("help-mtl-ofi.txt", "modex failed",
true, ompi_process_info.nodename,
procs[i]->super.proc_hostname,
opal_strerror(ret), ret);
goto bail;
}
memcpy(&ep_names[i*namelen], ep_name, namelen);
}
/**
* Map the EP names to fi_addrs.
*/
count = fi_av_insert(ompi_mtl_ofi.av, ep_names, nprocs, fi_addrs, 0, NULL);
if ((count < 0) || (nprocs != (size_t)count)) {
opal_output_verbose(1, opal_common_ofi.output,
"%s:%d: fi_av_insert failed: %d\n",
__FILE__, __LINE__, count);
ret = OMPI_ERROR;
goto bail;
}
/**
* Store the fi_addrs within the endpoint objects.
*/
for (i = 0; i < nprocs; ++i) {
endpoint = OBJ_NEW(mca_mtl_ofi_endpoint_t);
if (NULL == endpoint) {
opal_output_verbose(1, opal_common_ofi.output,
"%s:%d: mtl/ofi: could not allocate endpoint"
" structure\n",
__FILE__, __LINE__);
ret = OMPI_ERROR;
goto bail;
}
endpoint->mtl_ofi_module = &ompi_mtl_ofi;
endpoint->peer_fiaddr = fi_addrs[i];
/* FIXME: What happens if this endpoint already exists? */
procs[i]->proc_endpoints[OMPI_PROC_ENDPOINT_TAG_MTL] = endpoint;
}
/* Update global counter of number of procs added to this rank */
ompi_mtl_ofi.num_peers += nprocs;
ret = OMPI_SUCCESS;
bail:
if (fi_addrs)
free(fi_addrs);
if (ep_names)
free(ep_names);
return ret;
}
int
ompi_mtl_ofi_del_procs(struct mca_mtl_base_module_t *mtl,
size_t nprocs,
struct ompi_proc_t** procs)
{
int ret;
size_t i;
mca_mtl_ofi_endpoint_t *endpoint = NULL;
for (i = 0 ; i < nprocs ; ++i) {
if (NULL != procs[i] &&
NULL != procs[i]->proc_endpoints[OMPI_PROC_ENDPOINT_TAG_MTL]) {
endpoint = procs[i]->proc_endpoints[OMPI_PROC_ENDPOINT_TAG_MTL];
ret = fi_av_remove(ompi_mtl_ofi.av, &endpoint->peer_fiaddr, 1, 0);
if (ret) {
opal_output_verbose(1, opal_common_ofi.output,
"%s:%d: fi_av_remove failed: %s\n", __FILE__, __LINE__, fi_strerror(errno));
return ret;
}
procs[i]->proc_endpoints[OMPI_PROC_ENDPOINT_TAG_MTL] = NULL;
OBJ_RELEASE(endpoint);
}
}
return OMPI_SUCCESS;
}
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