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openmpi/ompi/mca/btl/openib/btl_openib_component.c
Galen Shipman c9e0eda190 Initialize the completion queue to a reasonable size based on maximum number 
of send/receives outstanding.

Use ibv_cq_resize if available after initial creation of completion queue if
cq_size is too small (based on number of peers). 

This commit was SVN r11053.
2006-07-30 00:58:40 +00:00

1243 строки
51 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.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/constants.h"
#include "opal/event/event.h"
#include "opal/util/if.h"
#include "opal/util/argv.h"
#include "opal/util/output.h"
#include "opal/util/show_help.h"
#include "ompi/proc/proc.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/mca/btl/btl.h"
#include "opal/sys/timer.h"
#include "opal/mca/base/mca_base_param.h"
#include "orte/mca/errmgr/errmgr.h"
#include "ompi/mca/mpool/base/base.h"
#include "btl_openib.h"
#include "btl_openib_frag.h"
#include "btl_openib_endpoint.h"
#include "btl_openib_eager_rdma.h"
#include "btl_openib_proc.h"
#include "ompi/mca/btl/base/base.h"
#include "ompi/datatype/convertor.h"
#include "ompi/mca/mpool/mpool.h"
#include <sysfs/libsysfs.h>
#include <infiniband/verbs.h>
#include <errno.h>
#include <string.h> /* for strerror()*/
#include "ompi/mca/pml/base/pml_base_module_exchange.h"
mca_btl_openib_component_t mca_btl_openib_component = {
{
/* First, the mca_base_component_t struct containing meta information
about the component itself */
{
/* Indicate that we are a pml v1.0.0 component (which also implies a
specific MCA version) */
MCA_BTL_BASE_VERSION_1_0_0,
"openib", /* MCA component name */
OMPI_MAJOR_VERSION, /* MCA component major version */
OMPI_MINOR_VERSION, /* MCA component minor version */
OMPI_RELEASE_VERSION, /* MCA component release version */
mca_btl_openib_component_open, /* component open */
mca_btl_openib_component_close /* component close */
},
/* Next the MCA v1.0.0 component meta data */
{
/* Whether the component is checkpointable or not */
false
},
mca_btl_openib_component_init,
mca_btl_openib_component_progress,
}
};
/*
* utility routines for parameter registration
*/
static inline void mca_btl_openib_param_register_string(
const char* param_name,
const char* param_desc,
const char* default_value,
char** out_value)
{
mca_base_param_reg_string(&mca_btl_openib_component.super.btl_version,
param_name,
param_desc,
false,
false,
default_value,
out_value);
}
static inline void mca_btl_openib_param_register_int(
const char* param_name,
const char* param_desc,
int default_value,
int* out_value)
{
mca_base_param_reg_int(&mca_btl_openib_component.super.btl_version,
param_name,
param_desc,
false,
false,
default_value,
out_value);
}
/*
* Called by MCA framework to open the component, registers
* component parameters.
*/
int mca_btl_openib_component_open(void)
{
char *msg;
int val;
/* initialize state */
mca_btl_openib_component.ib_num_btls=0;
mca_btl_openib_component.openib_btls=NULL;
/* initialize objects */
OBJ_CONSTRUCT(&mca_btl_openib_component.ib_procs, opal_list_t);
/* register IB component parameters */
mca_btl_openib_param_register_int ("max_btls", "maximum number of HCAs/ports to use",
4, &mca_btl_openib_component.ib_max_btls);
mca_btl_openib_param_register_int ("free_list_num", "intial size of free lists",
8, &mca_btl_openib_component.ib_free_list_num);
mca_btl_openib_param_register_int ("free_list_max", "maximum size of free lists",
-1, &mca_btl_openib_component.ib_free_list_max);
mca_btl_openib_param_register_int ("free_list_inc", "increment size of free lists",
32, &mca_btl_openib_component.ib_free_list_inc);
mca_btl_openib_param_register_string("mpool", "name of the memory pool to be used",
"openib", &mca_btl_openib_component.ib_mpool_name);
mca_btl_openib_param_register_int("reg_mru_len", "length of the registration cache most recently used list",
16, (int*) &mca_btl_openib_component.reg_mru_len);
mca_btl_openib_param_register_int("use_srq", "if 1 use the IB shared receive queue to post receive descriptors",
0, (int*) &mca_btl_openib_component.use_srq);
mca_btl_openib_param_register_int("ib_cq_size", "size of the IB completion "
"queue, an override of this value may occur if set too small, "
"the override is 2*Number of Peers* btl_openib_rd_num",
1000, (int*) &mca_btl_openib_component.ib_cq_size);
mca_btl_openib_param_register_int("ib_sg_list_size", "size of IB segment list",
4, (int*) &mca_btl_openib_component.ib_sg_list_size);
mca_btl_openib_param_register_int("ib_pkey_ix", "IB pkey index",
0, (int*) &mca_btl_openib_component.ib_pkey_ix);
mca_btl_openib_param_register_int("ib_psn", "IB Packet sequence starting number",
0, (int*) &mca_btl_openib_component.ib_psn);
mca_btl_openib_param_register_int("ib_qp_ous_rd_atom", "IB outstanding atomic reads",
4, (int*) &mca_btl_openib_component.ib_qp_ous_rd_atom);
val = IBV_MTU_1024;
asprintf(&msg, "IB MTU, in bytes. Valid values are: %d=256 bytes, %d=512 bytes, %d=1024 bytes, %d=2048 bytes, %d=4096 bytes.",
IBV_MTU_256,
IBV_MTU_512,
IBV_MTU_1024,
IBV_MTU_2048,
IBV_MTU_4096);
mca_btl_openib_param_register_int("ib_mtu", msg,
val, (int*) &mca_btl_openib_component.ib_mtu);
free(msg);
mca_btl_openib_param_register_int("ib_min_rnr_timer", "IB min rnr timer",
5, (int*) &mca_btl_openib_component.ib_min_rnr_timer);
mca_btl_openib_param_register_int("ib_timeout", "IB transmit timeout",
10, (int*) &mca_btl_openib_component.ib_timeout);
mca_btl_openib_param_register_int("ib_retry_count", "IB transmit retry count",
7, (int*) &mca_btl_openib_component.ib_retry_count);
mca_btl_openib_param_register_int("ib_rnr_retry", "IB rnr retry",
7, (int*) &mca_btl_openib_component.ib_rnr_retry);
mca_btl_openib_param_register_int("ib_max_rdma_dst_ops", "IB max rdma destination operations",
4, (int*) &mca_btl_openib_component.ib_max_rdma_dst_ops);
mca_btl_openib_param_register_int("ib_service_level", "IB service level",
0, (int*) &mca_btl_openib_component.ib_service_level);
mca_btl_openib_param_register_int("ib_static_rate", "IB static rate",
0, (int*) &mca_btl_openib_component.ib_static_rate);
mca_btl_openib_param_register_int ("exclusivity", "BTL exclusivity",
MCA_BTL_EXCLUSIVITY_DEFAULT, (int*) &mca_btl_openib_module.super.btl_exclusivity);
mca_btl_openib_param_register_int("rd_num", "number of receive descriptors to post to a QP",
8, (int*) &mca_btl_openib_component.rd_num);
mca_btl_openib_param_register_int("rd_low", "low water mark before reposting occurs",
6, (int*) &mca_btl_openib_component.rd_low);
mca_btl_openib_param_register_int("rd_win", "window size at which generate explicity credit message",
4, (int*) &mca_btl_openib_component.rd_win);
mca_btl_openib_component.rd_rsv = ((mca_btl_openib_component.rd_num<<1)-1) / mca_btl_openib_component.rd_win;
mca_btl_openib_param_register_int("srq_rd_max", "Max number of receive descriptors posted per SRQ.",
1000, (int*) &mca_btl_openib_component.srq_rd_max);
mca_btl_openib_param_register_int("srq_rd_per_peer", "Number of receive descriptors posted per peer. (SRQ)",
16, (int*) &mca_btl_openib_component.srq_rd_per_peer);
mca_btl_openib_param_register_int("srq_sd_max", "Maximum number of send descriptors posted. (SRQ)",
8, &mca_btl_openib_component.srq_sd_max);
mca_btl_openib_param_register_int("use_eager_rdma", "user RDMA for eager messages",
1, (int*) &mca_btl_openib_component.use_eager_rdma);
if (mca_btl_openib_component.use_srq)
mca_btl_openib_component.use_eager_rdma = 0;
mca_btl_openib_param_register_int("eager_rdma_threshold", "Open rdma channel for eager messages after this number of messages received from peer",
16, (int*) &mca_btl_openib_component.eager_rdma_threshold);
mca_btl_openib_param_register_int("max_eager_rdma", "Maximum number of eager RDMA connections",
16, (int*)&mca_btl_openib_component.max_eager_rdma);
mca_btl_openib_param_register_int("eager_rdma_num", "Number of RDMA buffers for eager messages",
16, (int*)&mca_btl_openib_component.eager_rdma_num);
mca_btl_openib_component.eager_rdma_num+=1;
mca_btl_openib_param_register_int("btls_per_lid", "Number of BTLs to create for each LID",
1, (int*)&mca_btl_openib_component.btls_per_lid);
mca_btl_openib_param_register_int("max_lmc", "Maximum LIDs to use for each port (0 - all available)",
0, (int*)&mca_btl_openib_component.max_lmc);
mca_btl_openib_param_register_int("buffer_alignment", "Prefered communication buffers alignmet for best performance",
64, (int*)&mca_btl_openib_component.buffer_alignment);
mca_btl_openib_param_register_int ("eager_limit", "eager send limit",
(12*1024), &val);
mca_btl_openib_module.super.btl_eager_limit = val;
mca_btl_openib_param_register_int ("min_send_size", "minimum send size",
(32*1024), &val);
mca_btl_openib_module.super.btl_min_send_size = val;
mca_btl_openib_param_register_int ("max_send_size", "maximum send size",
(64*1024), &val);
mca_btl_openib_module.super.btl_max_send_size = val;
mca_btl_openib_param_register_int("min_rdma_size", "minimum rdma size",
1024*1024, &val);
mca_btl_openib_module.super.btl_min_rdma_size = val;
mca_btl_openib_param_register_int("max_rdma_size", "maximium rdma size",
1024*1024, &val);
mca_btl_openib_module.super.btl_max_rdma_size = val;
mca_btl_openib_param_register_int("flags", "BTL flags, SEND=1, PUT=2, GET=4",
MCA_BTL_FLAGS_PUT | MCA_BTL_FLAGS_NEED_ACK | MCA_BTL_FLAGS_NEED_CSUM,
(int*) &mca_btl_openib_module.super.btl_flags);
mca_btl_openib_param_register_int("bandwidth", "Approximate maximum bandwidth of interconnect",
800, (int*) &mca_btl_openib_module.super.btl_bandwidth);
mca_btl_openib_component.max_send_size = mca_btl_openib_module.super.btl_max_send_size;
mca_btl_openib_component.eager_limit = mca_btl_openib_module.super.btl_eager_limit;
return OMPI_SUCCESS;
}
/*
* component cleanup - sanity checking of queue lengths
*/
int mca_btl_openib_component_close(void)
{
return OMPI_SUCCESS;
}
/*
* Register OPENIB port information. The MCA framework
* will make this available to all peers.
*/
static int
mca_btl_openib_modex_send(void)
{
int rc, i;
size_t size;
mca_btl_openib_port_info_t *ports = NULL;
size = mca_btl_openib_component.ib_num_btls * sizeof (mca_btl_openib_port_info_t);
if (size != 0) {
ports = (mca_btl_openib_port_info_t *)malloc (size);
if (NULL == ports) {
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i = 0; i < mca_btl_openib_component.ib_num_btls; i++) {
mca_btl_openib_module_t *btl = &mca_btl_openib_component.openib_btls[i];
ports[i] = btl->port_info;
}
}
rc = mca_pml_base_modex_send (&mca_btl_openib_component.super.btl_version, ports, size);
if (NULL != ports) {
free (ports);
}
return rc;
}
/*
* Callback function on control message.
*/
static void mca_btl_openib_control(
struct mca_btl_base_module_t* btl,
mca_btl_base_tag_t tag,
mca_btl_base_descriptor_t* descriptor,
void* cbdata)
{
/* dont return credits used for control messages */
mca_btl_openib_frag_t* frag = (mca_btl_openib_frag_t*)descriptor;
mca_btl_openib_endpoint_t* endpoint = frag->endpoint;
mca_btl_openib_control_header_t *ctl_hdr = frag->segment.seg_addr.pval;
mca_btl_openib_eager_rdma_header_t *rdma_hdr;
if(frag->size == mca_btl_openib_component.eager_limit) {
/* if not sent via rdma */
if(!MCA_BTL_OPENIB_RDMA_FRAG(frag) &&
ctl_hdr->type == MCA_BTL_OPENIB_CONTROL_NOOP) {
OPAL_THREAD_ADD32(&endpoint->rd_credits_hp, -1);
}
} else {
OPAL_THREAD_ADD32(&endpoint->rd_credits_lp, -1);
}
switch (ctl_hdr->type) {
case MCA_BTL_OPENIB_CONTROL_NOOP:
break;
case MCA_BTL_OPENIB_CONTROL_RDMA:
rdma_hdr = (mca_btl_openib_eager_rdma_header_t*)ctl_hdr;
if (endpoint->eager_rdma_remote.base.pval) {
BTL_ERROR(("Got RDMA connect twise!"));
return;
}
endpoint->eager_rdma_remote.rkey = rdma_hdr->rkey;
endpoint->eager_rdma_remote.base.pval = rdma_hdr->rdma_start.pval;
endpoint->eager_rdma_remote.tokens =
mca_btl_openib_component.eager_rdma_num - 1;
break;
default:
BTL_ERROR(("Unknown message type received by BTL"));
break;
}
}
static int init_one_port(opal_list_t *btl_list, mca_btl_openib_hca_t *hca,
uint8_t port_num, struct ibv_port_attr *ib_port_attr)
{
uint16_t lid, i, lmc;
mca_btl_openib_module_t *openib_btl;
mca_btl_base_selected_module_t *ib_selected;
lmc = (1 << ib_port_attr->lmc);
if(mca_btl_openib_component.max_lmc &&
mca_btl_openib_component.max_lmc < lmc)
lmc = mca_btl_openib_component.max_lmc;
for(lid = ib_port_attr->lid;
lid < ib_port_attr->lid + lmc; lid++){
for(i = 0; i < mca_btl_openib_component.btls_per_lid; i++){
openib_btl = malloc(sizeof(mca_btl_openib_module_t));
if(NULL == openib_btl) {
ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
return -1;
}
memcpy(openib_btl, &mca_btl_openib_module,
sizeof(mca_btl_openib_module));
memcpy(&openib_btl->ib_port_attr, ib_port_attr,
sizeof(struct ibv_port_attr));
ib_selected = OBJ_NEW(mca_btl_base_selected_module_t);
ib_selected->btl_module = (mca_btl_base_module_t*) openib_btl;
openib_btl->hca = hca;
openib_btl->port_num = (uint8_t) port_num;
openib_btl->lid = lid;
openib_btl->src_path_bits = lid - ib_port_attr->lid;
/* store the sm_lid for multi-nic support */
openib_btl->port_info.subnet = ib_port_attr->sm_lid;
openib_btl->ib_reg[MCA_BTL_TAG_BTL].cbfunc =
mca_btl_openib_control;
openib_btl->ib_reg[MCA_BTL_TAG_BTL].cbdata = NULL;
opal_list_append(btl_list, (opal_list_item_t*) ib_selected);
hca->btls++;
if(++mca_btl_openib_component.ib_num_btls >=
mca_btl_openib_component.ib_max_btls)
return 0;
}
}
return 1;
}
static int init_one_hca(opal_list_t *btl_list, struct ibv_device* ib_dev)
{
struct mca_mpool_base_resources_t mpool_resources;
mca_btl_openib_hca_t *hca;
uint8_t i;
int ret = -1;
hca = malloc(sizeof(mca_btl_openib_hca_t));
if(NULL == hca){
ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
return -1;
}
hca->ib_dev = ib_dev;
hca->ib_dev_context = ibv_open_device(ib_dev);
hca->btls = 0;
if(NULL == hca->ib_dev_context){
BTL_ERROR(("error obtaining device context for %s errno says %s\n",
ibv_get_device_name(ib_dev), strerror(errno)));
goto free_hca;
}
if(ibv_query_device(hca->ib_dev_context, &hca->ib_dev_attr)){
BTL_ERROR(("error obtaining device attributes for %s errno says %s\n",
ibv_get_device_name(ib_dev), strerror(errno)));
goto close_hca;
}
hca->ib_pd = ibv_alloc_pd(hca->ib_dev_context);
if(NULL == hca->ib_pd){
BTL_ERROR(("error allocating pd for %s errno says %s\n",
ibv_get_device_name(ib_dev), strerror(errno)));
goto close_hca;
}
mpool_resources.ib_pd = hca->ib_pd;
hca->mpool =
mca_mpool_base_module_create(mca_btl_openib_component.ib_mpool_name,
hca, &mpool_resources);
if(NULL == hca->mpool){
BTL_ERROR(("error creating IB memory pool for %s errno says %s\n",
ibv_get_device_name(ib_dev), strerror(errno)));
goto dealloc_pd;
}
ret = 1;
/* Note ports are 1 based hence j = 1 */
for(i = 1; i <= hca->ib_dev_attr.phys_port_cnt; i++){
struct ibv_port_attr ib_port_attr;
if(ibv_query_port(hca->ib_dev_context, i, &ib_port_attr)){
BTL_ERROR(("error getting port attributes for device %s "
"port number %d errno says %s",
ibv_get_device_name(ib_dev), i, strerror(errno)));
break;
}
if(IBV_PORT_ACTIVE == ib_port_attr.state){
ret = init_one_port(btl_list, hca, i, &ib_port_attr);
if (ret <= 0)
break;
}
}
if (hca->btls != 0)
return ret;
mca_mpool_base_module_destroy(hca->mpool);
dealloc_pd:
ibv_dealloc_pd(hca->ib_pd);
close_hca:
ibv_close_device(hca->ib_dev_context);
free_hca:
free(hca);
return ret;
}
/*
* IB component initialization:
* (1) read interface list from kernel and compare against component parameters
* then create a BTL instance for selected interfaces
* (2) setup IB listen socket for incoming connection attempts
* (3) register BTL parameters with the MCA
*/
mca_btl_base_module_t** mca_btl_openib_component_init(int *num_btl_modules,
bool enable_progress_threads,
bool enable_mpi_threads)
{
struct ibv_device **ib_devs;
mca_btl_base_module_t** btls;
int i, length, num_devs;
opal_list_t btl_list;
mca_btl_openib_module_t * openib_btl;
mca_btl_base_selected_module_t* ib_selected;
opal_list_item_t* item;
#if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST == 0
struct dlist *dev_list;
struct ibv_device* ib_dev;
#endif
unsigned short seedv[3];
/* initialization */
*num_btl_modules = 0;
num_devs = 0;
/* openib BTL does not currently support progress threads, so
disable the component if they were requested */
if (enable_progress_threads) {
mca_btl_base_error_no_nics("OpenIB", "HCA");
mca_btl_openib_component.ib_num_btls = 0;
mca_btl_openib_modex_send();
return NULL;
}
seedv[0] = orte_process_info.my_name->vpid;
seedv[1] = opal_sys_timer_get_cycles();
seedv[2] = opal_sys_timer_get_cycles();
seed48(seedv);
#if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST
ib_devs = ibv_get_device_list(&num_devs);
#else
/* Determine the number of hca's available on the host */
dev_list = ibv_get_devices();
if (NULL == dev_list) {
mca_btl_base_error_no_nics("OpenIB", "HCA");
mca_btl_openib_component.ib_num_btls = 0;
mca_btl_openib_modex_send();
return NULL;
}
dlist_start(dev_list);
dlist_for_each_data(dev_list, ib_dev, struct ibv_device)
num_devs++;
#endif
if(0 == num_devs) {
mca_btl_base_error_no_nics("OpenIB", "HCA");
mca_btl_openib_modex_send();
return NULL;
}
#if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST == 0
/* Allocate space for the ib devices */
ib_devs = (struct ibv_device**) malloc(num_devs * sizeof(struct ibv_dev*));
if(NULL == ib_devs) {
ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
return NULL;
}
dlist_start(dev_list);
i = 0;
dlist_for_each_data(dev_list, ib_dev, struct ibv_device)
ib_devs[i++] = ib_dev;
#endif
/** We must loop through all the hca id's, get there handles and
for each hca we query the number of ports on the hca and set up
a distinct btl module for each hca port */
OBJ_CONSTRUCT(&btl_list, opal_list_t);
OBJ_CONSTRUCT(&mca_btl_openib_component.ib_lock, opal_mutex_t);
for(i = 0; i < num_devs
&& mca_btl_openib_component.ib_num_btls <
mca_btl_openib_component.ib_max_btls; i++){
if (init_one_hca(&btl_list, ib_devs[i]) <= 0)
break;
}
/* Allocate space for btl modules */
mca_btl_openib_component.openib_btls =
malloc(sizeof(mca_btl_openib_module_t) *
mca_btl_openib_component.ib_num_btls);
if(NULL == mca_btl_openib_component.openib_btls) {
ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
return NULL;
}
btls = malloc(mca_btl_openib_component.ib_num_btls *
sizeof(struct mca_btl_openib_module_t*));
if(NULL == btls) {
ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
return NULL;
}
for(i = 0; i < mca_btl_openib_component.ib_num_btls; i++){
item = opal_list_remove_first(&btl_list);
ib_selected = (mca_btl_base_selected_module_t*)item;
openib_btl = (mca_btl_openib_module_t*) ib_selected->btl_module;
memcpy(&(mca_btl_openib_component.openib_btls[i]), openib_btl,
sizeof(mca_btl_openib_module_t));
free(ib_selected);
free(openib_btl);
openib_btl = &mca_btl_openib_component.openib_btls[i];
openib_btl->rd_num = mca_btl_openib_component.rd_num +
mca_btl_openib_component.rd_rsv;
openib_btl->rd_low = mca_btl_openib_component.rd_low;
openib_btl->num_peers = 0;
openib_btl->sd_tokens_hp = openib_btl->sd_tokens_lp =
mca_btl_openib_component.srq_sd_max;
/* Initialize module state */
OBJ_CONSTRUCT(&openib_btl->pending_frags_hp, opal_list_t);
OBJ_CONSTRUCT(&openib_btl->pending_frags_lp, opal_list_t);
OBJ_CONSTRUCT(&openib_btl->ib_lock, opal_mutex_t);
OBJ_CONSTRUCT(&openib_btl->send_free_eager, ompi_free_list_t);
OBJ_CONSTRUCT(&openib_btl->send_free_max, ompi_free_list_t);
OBJ_CONSTRUCT(&openib_btl->send_free_frag, ompi_free_list_t);
OBJ_CONSTRUCT(&openib_btl->send_free_control, ompi_free_list_t);
OBJ_CONSTRUCT(&openib_btl->recv_free_eager, ompi_free_list_t);
OBJ_CONSTRUCT(&openib_btl->recv_free_max, ompi_free_list_t);
/* initialize the memory pool using the hca */
openib_btl->super.btl_mpool = openib_btl->hca->mpool;
/* Initialize pool of send fragments */
length = sizeof(mca_btl_openib_frag_t) +
sizeof(mca_btl_openib_header_t) +
sizeof(mca_btl_openib_footer_t) +
openib_btl->super.btl_eager_limit;
openib_btl->eager_rdma_frag_size = length;
ompi_free_list_init_ex(&openib_btl->send_free_eager,
length,
sizeof(mca_btl_openib_frag_t),
mca_btl_openib_component.buffer_alignment,
OBJ_CLASS(mca_btl_openib_send_frag_eager_t),
mca_btl_openib_component.ib_free_list_num,
mca_btl_openib_component.ib_free_list_max,
mca_btl_openib_component.ib_free_list_inc,
openib_btl->super.btl_mpool);
ompi_free_list_init_ex(&openib_btl->recv_free_eager,
length,
sizeof(mca_btl_openib_frag_t),
mca_btl_openib_component.buffer_alignment,
OBJ_CLASS(mca_btl_openib_recv_frag_eager_t),
mca_btl_openib_component.ib_free_list_num,
mca_btl_openib_component.ib_free_list_max,
mca_btl_openib_component.ib_free_list_inc,
openib_btl->super.btl_mpool);
length = sizeof(mca_btl_openib_frag_t) +
sizeof(mca_btl_openib_header_t) +
openib_btl->super.btl_max_send_size;
ompi_free_list_init_ex(&openib_btl->send_free_max,
length,
sizeof(mca_btl_openib_frag_t),
mca_btl_openib_component.buffer_alignment,
OBJ_CLASS(mca_btl_openib_send_frag_max_t),
mca_btl_openib_component.ib_free_list_num,
mca_btl_openib_component.ib_free_list_max,
mca_btl_openib_component.ib_free_list_inc,
openib_btl->super.btl_mpool);
/* Initialize pool of receive fragments */
ompi_free_list_init_ex(&openib_btl->recv_free_max,
length,
sizeof(mca_btl_openib_frag_t),
mca_btl_openib_component.buffer_alignment,
OBJ_CLASS (mca_btl_openib_recv_frag_max_t),
mca_btl_openib_component.ib_free_list_num,
mca_btl_openib_component.ib_free_list_max,
mca_btl_openib_component.ib_free_list_inc, openib_btl->super.btl_mpool);
length = sizeof(mca_btl_openib_frag_t) +
sizeof(mca_btl_openib_header_t) +
sizeof(mca_btl_openib_footer_t) +
sizeof(mca_btl_openib_eager_rdma_header_t);
ompi_free_list_init_ex(&openib_btl->send_free_control,
length,
sizeof(mca_btl_openib_frag_t),
mca_btl_openib_component.buffer_alignment,
OBJ_CLASS(mca_btl_openib_send_frag_control_t),
mca_btl_openib_component.ib_free_list_num,
-1,
mca_btl_openib_component.ib_free_list_inc,
openib_btl->super.btl_mpool);
length = sizeof(mca_btl_openib_frag_t);
ompi_free_list_init(&openib_btl->send_free_frag,
length,
OBJ_CLASS(mca_btl_openib_send_frag_frag_t),
mca_btl_openib_component.ib_free_list_num,
mca_btl_openib_component.ib_free_list_max,
mca_btl_openib_component.ib_free_list_inc,
NULL);
orte_pointer_array_init(&openib_btl->eager_rdma_buffers,
mca_btl_openib_component.max_eager_rdma,
mca_btl_openib_component.max_eager_rdma,
0);
openib_btl->eager_rdma_buffers_count = 0;
OBJ_CONSTRUCT(&openib_btl->eager_rdma_lock, opal_mutex_t);
btls[i] = &openib_btl->super;
}
/* Post OOB receive to support dynamic connection setup */
mca_btl_openib_post_recv();
mca_btl_openib_modex_send();
*num_btl_modules = mca_btl_openib_component.ib_num_btls;
#if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST
ibv_free_device_list(ib_devs);
#else
free(ib_devs);
#endif
return btls;
}
static int mca_btl_openib_handle_incoming_hp(mca_btl_openib_module_t *,
mca_btl_openib_endpoint_t *,
mca_btl_openib_frag_t *,
size_t);
int mca_btl_openib_handle_incoming_hp(
mca_btl_openib_module_t *openib_btl,
mca_btl_openib_endpoint_t *endpoint,
mca_btl_openib_frag_t *frag,
size_t byte_len)
{
/* advance the segment address past the header and subtract from the length..*/
frag->segment.seg_len = byte_len -
((unsigned char*)frag->segment.seg_addr.pval -
(unsigned char*) frag->hdr);
/* call registered callback */
openib_btl->ib_reg[frag->hdr->tag].cbfunc(&openib_btl->super,
frag->hdr->tag, &frag->base,
openib_btl->ib_reg[frag->hdr->tag].cbdata);
if (!MCA_BTL_OPENIB_RDMA_FRAG(frag)) {
OMPI_FREE_LIST_RETURN(&(openib_btl->recv_free_eager),
(ompi_free_list_item_t*) frag);
} else {
mca_btl_openib_frag_t *tf;
OPAL_THREAD_LOCK(&endpoint->eager_rdma_local.lock);
MCA_BTL_OPENIB_RDMA_MAKE_REMOTE(frag->ftr);
while (endpoint->eager_rdma_local.tail !=
endpoint->eager_rdma_local.head) {
tf = MCA_BTL_OPENIB_GET_LOCAL_RDMA_FRAG(endpoint,
endpoint->eager_rdma_local.tail);
if (MCA_BTL_OPENIB_RDMA_FRAG_LOCAL (tf))
break;
OPAL_THREAD_ADD32(&endpoint->eager_rdma_local.credits, 1);
MCA_BTL_OPENIB_RDMA_NEXT_INDEX(endpoint->eager_rdma_local.tail);
}
OPAL_THREAD_UNLOCK(&endpoint->eager_rdma_local.lock);
}
if (!mca_btl_openib_component.use_srq) {
OPAL_THREAD_ADD32(&endpoint->sd_tokens_hp, frag->hdr->credits);
OPAL_THREAD_ADD32(&endpoint->eager_rdma_remote.tokens,
frag->hdr->rdma_credits);
}
if (mca_btl_openib_component.use_eager_rdma &&
!endpoint->eager_rdma_local.base.pval &&
openib_btl->eager_rdma_buffers_count <
mca_btl_openib_component.max_eager_rdma &&
OPAL_THREAD_ADD32(&endpoint->eager_recv_count, 1) ==
mca_btl_openib_component.eager_rdma_threshold)
mca_btl_openib_endpoint_connect_eager_rdma(endpoint);
/* repost receive descriptors */
#ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ
if(mca_btl_openib_component.use_srq) {
OPAL_THREAD_ADD32((int32_t*) &openib_btl->srd_posted_hp, -1);
MCA_BTL_OPENIB_POST_SRR_HIGH(openib_btl, 0);
} else {
#endif
if (!MCA_BTL_OPENIB_RDMA_FRAG(frag)) {
OPAL_THREAD_ADD32((int32_t*) &endpoint->rd_posted_hp, -1);
MCA_BTL_OPENIB_ENDPOINT_POST_RR_HIGH(endpoint, 0);
}
/* check to see if we need to progress any pending desciptors */
if(endpoint->sd_tokens_hp > 0 ||
endpoint->eager_rdma_remote.tokens > 0) {
while(!opal_list_is_empty(&endpoint->pending_frags_hp) &&
endpoint->sd_wqe_hp > 0 &&
(endpoint->sd_tokens_hp > 0 ||
endpoint->eager_rdma_remote.tokens > 0)) {
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
frag_item = opal_list_remove_first(&(endpoint->pending_frags_hp));
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
if(NULL == (frag = (mca_btl_openib_frag_t *) frag_item))
break;
if(OMPI_SUCCESS !=
mca_btl_openib_endpoint_send(frag->endpoint, frag)) {
BTL_ERROR(("error in posting pending send\n"));
break;
}
}
}
/* check to see if we need to return credits */
if((endpoint->rd_credits_hp >= mca_btl_openib_component.rd_win ||
endpoint->eager_rdma_local.credits >=
mca_btl_openib_component.rd_win) &&
OPAL_THREAD_ADD32(&endpoint->sd_credits_hp, 1) == 1) {
mca_btl_openib_endpoint_send_credits_hp(endpoint);
}
#ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ
}
#endif
return OMPI_SUCCESS;
}
static char* mca_btl_openib_component_status_to_string(enum ibv_wc_status status) {
switch(status) {
case IBV_WC_SUCCESS:
return "SUCCESS";
break;
case IBV_WC_LOC_LEN_ERR:
return "LOCAL LENGTH ERROR";
break;
case IBV_WC_LOC_QP_OP_ERR:
return "LOCAL QP OPERATION ERROR";
break;
case IBV_WC_LOC_EEC_OP_ERR:
return "LOCAL EEC OPERATION ERROR";
break;
case IBV_WC_LOC_PROT_ERR:
return "LOCAL PROTOCOL ERROR";
break;
case IBV_WC_WR_FLUSH_ERR:
return "WORK REQUEST FLUSHED ERROR";
break;
case IBV_WC_MW_BIND_ERR:
return "MEMORY WINDOW BIND ERROR";
break;
case IBV_WC_BAD_RESP_ERR:
return "BAD RESPONSE ERROR";
break;
case IBV_WC_LOC_ACCESS_ERR:
return "LOCAL ACCESS ERROR";
break;
case IBV_WC_REM_INV_REQ_ERR:
return "INVALID REQUEST ERROR";
break;
case IBV_WC_REM_ACCESS_ERR:
return "REMOTE ACCESS ERROR";
break;
case IBV_WC_REM_OP_ERR:
return "REMOTE OPERATION ERROR";
break;
case IBV_WC_RETRY_EXC_ERR:
return "RETRY EXCEEDED ERROR";
break;
case IBV_WC_RNR_RETRY_EXC_ERR:
return "RECEIVER NOT READY RETRY EXCEEEDED ERROR";
break;
case IBV_WC_LOC_RDD_VIOL_ERR:
return "LOCAL RDD VIOLATION ERROR";
break;
case IBV_WC_REM_INV_RD_REQ_ERR:
return "INVALID READ REQUEST ERROR";
break;
case IBV_WC_REM_ABORT_ERR:
return "REMOTE ABORT ERROR";
break;
case IBV_WC_INV_EECN_ERR:
return "INVALID EECN ERROR";
break;
case IBV_WC_INV_EEC_STATE_ERR:
return "INVALID EEC STATE ERROR";
break;
case IBV_WC_FATAL_ERR:
return "FATAL ERROR";
break;
case IBV_WC_RESP_TIMEOUT_ERR:
return "RESPONSE TIMEOUT ERROR";
break;
case IBV_WC_GENERAL_ERR:
return "GENERAL ERROR";
break;
default:
return "STATUS UNDEFINED";
break;
}
}
/*
* IB component progress.
*/
int mca_btl_openib_component_progress()
{
int i, j, c;
int count = 0,ne = 0, ret;
int32_t credits;
mca_btl_openib_frag_t* frag;
mca_btl_openib_endpoint_t* endpoint;
/* Poll for RDMA completions - if any succeed, we don't process the slower queues */
for(i = 0; i < mca_btl_openib_component.ib_num_btls; i++) {
mca_btl_openib_module_t* openib_btl = &mca_btl_openib_component.openib_btls[i];
OPAL_THREAD_LOCK(&openib_btl->eager_rdma_lock);
c = openib_btl->eager_rdma_buffers_count;
OPAL_THREAD_UNLOCK(&openib_btl->eager_rdma_lock);
for(j = 0; j < c; j++) {
endpoint =
orte_pointer_array_get_item(openib_btl->eager_rdma_buffers, j);
if(!endpoint) /* shouldn't happen */
continue;
OPAL_THREAD_LOCK(&endpoint->eager_rdma_local.lock);
frag = MCA_BTL_OPENIB_GET_LOCAL_RDMA_FRAG (endpoint,
endpoint->eager_rdma_local.head);
if (MCA_BTL_OPENIB_RDMA_FRAG_LOCAL (frag)) {
uint32_t size = MCA_BTL_OPENIB_RDMA_FRAG_GET_SIZE(frag->ftr);
#if OMPI_ENABLE_DEBUG
if (frag->ftr->seq != endpoint->eager_rdma_local.seq)
BTL_ERROR(("Eager RDMA wrong SEQ: received %d expected %d",
frag->ftr->seq,
endpoint->eager_rdma_local.seq));
endpoint->eager_rdma_local.seq++;
#endif
MCA_BTL_OPENIB_RDMA_NEXT_INDEX(endpoint->eager_rdma_local.head);
OPAL_THREAD_UNLOCK(&endpoint->eager_rdma_local.lock);
frag->hdr = (mca_btl_openib_header_t*)(((char*)frag->ftr) -
size + sizeof(mca_btl_openib_footer_t));
frag->segment.seg_addr.pval = ((unsigned char* )frag->hdr) +
sizeof(mca_btl_openib_header_t);
ret = mca_btl_openib_handle_incoming_hp(openib_btl,
frag->endpoint, frag,
size - sizeof(mca_btl_openib_footer_t));
if (ret != MPI_SUCCESS)
return ret;
count++;
} else
OPAL_THREAD_UNLOCK(&endpoint->eager_rdma_local.lock);
}
}
if(count) return count;
for(i = 0; i < mca_btl_openib_component.ib_num_btls; i++) {
struct ibv_wc wc;
mca_btl_openib_module_t* openib_btl = &mca_btl_openib_component.openib_btls[i];
/* we have two completion queues, one for "high" priority and one for "low".
* we will check the high priority and process them until there are none left.
* note that low priority messages are only processed one per progress call.
*/
ne=ibv_poll_cq(openib_btl->ib_cq_hp, 1, &wc );
if(ne < 0 ){
BTL_ERROR(("error polling HP CQ with %d errno says %s\n", ne, strerror(errno)));
return OMPI_ERROR;
}
else if(1 == ne) {
if(wc.status != IBV_WC_SUCCESS) {
static int flush_err_printed = 0;
ompi_proc_t* remote_proc = NULL;
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
if(frag) {
endpoint = (mca_btl_openib_endpoint_t*) frag->endpoint;
if(endpoint &&
endpoint->endpoint_proc &&
endpoint->endpoint_proc->proc_ompi) {
remote_proc = endpoint->endpoint_proc->proc_ompi;
}
}
if(wc.status != IBV_WC_WR_FLUSH_ERR || !flush_err_printed++)
BTL_PEER_ERROR(remote_proc, ("error polling HP CQ with status %s status number %d for wr_id %llu opcode %d",
mca_btl_openib_component_status_to_string(wc.status),
wc.status, wc.wr_id, wc.opcode));
if(wc.status == IBV_WC_RETRY_EXC_ERR) {
opal_show_help("help-mpi-btl-openib.txt", "btl_openib:retry-exceeded", true);
abort();
}
return OMPI_ERROR;
}
/* Handle work completions */
switch(wc.opcode) {
case IBV_WC_RECV_RDMA_WITH_IMM:
BTL_ERROR(("Got an RDMA with Immediate data Not supported!"));
return OMPI_ERROR;
case IBV_WC_RDMA_WRITE:
case IBV_WC_SEND :
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
endpoint = frag->endpoint;
/* Process a completed send */
frag->base.des_cbfunc(&openib_btl->super, frag->endpoint, &frag->base, OMPI_SUCCESS);
/* return send wqe */
OPAL_THREAD_ADD32(&endpoint->sd_wqe_hp, 1);
/* check to see if we need to progress any pending desciptors */
while (!opal_list_is_empty(&endpoint->pending_frags_hp) &&
endpoint->sd_wqe_hp > 0 && (endpoint->sd_tokens_hp > 0 || endpoint->eager_rdma_remote.tokens > 0)) {
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
frag_item = opal_list_remove_first(&(endpoint->pending_frags_hp));
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
if(NULL == (frag = (mca_btl_openib_frag_t *) frag_item))
break;
if(OMPI_SUCCESS != mca_btl_openib_endpoint_send(frag->endpoint, frag)) {
BTL_ERROR(("error in posting pending send\n"));
break;
}
}
if(!mca_btl_openib_component.use_srq) {
/* check to see if we need to return credits */
if((endpoint->rd_credits_hp >= mca_btl_openib_component.rd_win || endpoint->eager_rdma_local.credits >= mca_btl_openib_component.rd_win) &&
OPAL_THREAD_ADD32(&endpoint->sd_credits_hp, 1) == 1) {
mca_btl_openib_endpoint_send_credits_hp(endpoint);
}
} else if(OPAL_THREAD_ADD32(&openib_btl->sd_tokens_hp, 1) > 0
&& !opal_list_is_empty(&openib_btl->pending_frags_hp)) {
/* dequeue resources due to global flow control */
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&openib_btl->ib_lock);
frag_item = opal_list_remove_first(&openib_btl->pending_frags_hp);
OPAL_THREAD_UNLOCK(&openib_btl->ib_lock);
if(NULL != (frag = (mca_btl_openib_frag_t *) frag_item) &&
OMPI_SUCCESS != mca_btl_openib_endpoint_send(frag->endpoint, frag)) {
BTL_ERROR(("error in posting pending send\n"));
}
}
count++;
break;
case IBV_WC_RECV:
/* Process a RECV */
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
ret = mca_btl_openib_handle_incoming_hp(openib_btl,
frag->endpoint, frag, wc.byte_len);
if (ret != OMPI_SUCCESS)
return ret;
count++;
break;
case IBV_WC_RDMA_READ:
default:
BTL_ERROR(("Unhandled work completion opcode is %d", wc.opcode));
break;
}
}
ne=ibv_poll_cq(openib_btl->ib_cq_lp, 1, &wc );
if(ne < 0){
BTL_ERROR(("error polling LP CQ with %d errno says %s", ne, strerror(errno)));
return OMPI_ERROR;
}
else if(1 == ne) {
if(wc.status != IBV_WC_SUCCESS) {
static int flush_err_printed = 0;
ompi_proc_t* remote_proc = NULL;
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
if(frag) {
endpoint = (mca_btl_openib_endpoint_t*) frag->endpoint;
if(endpoint &&
endpoint->endpoint_proc &&
endpoint->endpoint_proc->proc_ompi) {
remote_proc = endpoint->endpoint_proc->proc_ompi;
}
}
if(wc.status != IBV_WC_WR_FLUSH_ERR || !flush_err_printed++)
BTL_PEER_ERROR(remote_proc, ("error polling LP CQ with status %s status number %d for wr_id %llu opcode %d",
mca_btl_openib_component_status_to_string(wc.status),
wc.status, wc.wr_id, wc.opcode));
return OMPI_ERROR;
}
/* Handle n/w completions */
switch(wc.opcode) {
case IBV_WC_RECV_RDMA_WITH_IMM:
BTL_ERROR(("Got an RDMA with Immediate data Not supported!"));
return OMPI_ERROR;
case IBV_WC_SEND:
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
endpoint = frag->endpoint;
/* Process a completed send - receiver must return tokens */
frag->base.des_cbfunc(&openib_btl->super, frag->endpoint, &frag->base, OMPI_SUCCESS);
/* return send wqe */
OPAL_THREAD_ADD32(&endpoint->sd_wqe_lp, 1);
/* check to see if we need to progress any pending desciptors */
while (!opal_list_is_empty(&endpoint->pending_frags_lp) &&
endpoint->sd_wqe_lp > 0 && endpoint->sd_tokens_lp > 0) {
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
frag_item = opal_list_remove_first(&(endpoint->pending_frags_lp));
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
if(NULL == (frag = (mca_btl_openib_frag_t *) frag_item))
break;
MCA_BTL_IB_FRAG_PROGRESS(frag);
}
if( !mca_btl_openib_component.use_srq) {
/* check to see if we need to return credits */
if( endpoint->rd_credits_lp >= mca_btl_openib_component.rd_win &&
OPAL_THREAD_ADD32(&endpoint->sd_credits_lp, 1) == 1) {
mca_btl_openib_endpoint_send_credits_lp(endpoint);
}
/* SRQ case */
} else if(OPAL_THREAD_ADD32(&openib_btl->sd_tokens_lp, 1) > 0
&& !opal_list_is_empty(&openib_btl->pending_frags_lp)) {
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&openib_btl->ib_lock);
frag_item = opal_list_remove_first(&openib_btl->pending_frags_lp);
OPAL_THREAD_UNLOCK(&openib_btl->ib_lock);
if(NULL != (frag = (mca_btl_openib_frag_t *) frag_item)) {
MCA_BTL_IB_FRAG_PROGRESS(frag);
}
}
count++;
break;
case IBV_WC_RDMA_READ:
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
OPAL_THREAD_ADD32(&frag->endpoint->get_tokens, 1);
/* fall through */
case IBV_WC_RDMA_WRITE:
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
endpoint = frag->endpoint;
/* process a completed write */
frag->base.des_cbfunc(&openib_btl->super, frag->endpoint, &frag->base, OMPI_SUCCESS);
/* return send wqe */
OPAL_THREAD_ADD32(&endpoint->sd_wqe_lp, 1);
/* check for pending frags */
if(!opal_list_is_empty(&endpoint->pending_frags_lp)) {
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
frag_item = opal_list_remove_first(&endpoint->pending_frags_lp);
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
if(NULL != (frag = (mca_btl_openib_frag_t *) frag_item)) {
MCA_BTL_IB_FRAG_PROGRESS(frag);
}
}
if (mca_btl_openib_component.use_srq &&
endpoint->sd_wqe_lp > 0 &&
!opal_list_is_empty(&openib_btl->pending_frags_lp)) {
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&openib_btl->ib_lock);
frag_item = opal_list_remove_first(&openib_btl->pending_frags_lp);
OPAL_THREAD_UNLOCK(&openib_btl->ib_lock);
if(NULL != (frag = (mca_btl_openib_frag_t *) frag_item)) {
MCA_BTL_IB_FRAG_PROGRESS(frag);
}
}
count++;
break;
case IBV_WC_RECV:
/* Process a RECV */
frag = (mca_btl_openib_frag_t*) (unsigned long) wc.wr_id;
endpoint = (mca_btl_openib_endpoint_t*) frag->endpoint;
credits = frag->hdr->credits;
/* advance the segment address past the header and subtract from the length..*/
frag->segment.seg_len = wc.byte_len-
((unsigned char*) frag->segment.seg_addr.pval - (unsigned char*) frag->hdr);
/* call registered callback */
openib_btl->ib_reg[frag->hdr->tag].cbfunc(&openib_btl->super,
frag->hdr->tag,
&frag->base,
openib_btl->ib_reg[frag->hdr->tag].cbdata);
OMPI_FREE_LIST_RETURN(&(openib_btl->recv_free_max), (ompi_free_list_item_t*) frag);
#ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ
if(mca_btl_openib_component.use_srq) {
/* repost receive descriptors */
OPAL_THREAD_ADD32((int32_t*) &openib_btl->srd_posted_lp, -1);
MCA_BTL_OPENIB_POST_SRR_LOW(openib_btl, 0);
} else {
#endif
/* repost receive descriptors */
OPAL_THREAD_ADD32((int32_t*) &endpoint->rd_posted_lp, -1);
MCA_BTL_OPENIB_ENDPOINT_POST_RR_LOW(endpoint, 0);
/* check to see if we need to progress any pending desciptors */
if( OPAL_THREAD_ADD32(&endpoint->sd_tokens_lp, credits) > 0) {
while(!opal_list_is_empty(&endpoint->pending_frags_lp) &&
endpoint->sd_wqe_lp > 0 && endpoint->sd_tokens_lp > 0) {
opal_list_item_t *frag_item;
OPAL_THREAD_LOCK(&endpoint->endpoint_lock);
frag_item = opal_list_remove_first(&(endpoint->pending_frags_lp));
OPAL_THREAD_UNLOCK(&endpoint->endpoint_lock);
if(NULL == (frag = (mca_btl_openib_frag_t *) frag_item))
break;
MCA_BTL_IB_FRAG_PROGRESS(frag);
}
}
/* check to see if we need to return credits */
if( endpoint->rd_credits_lp >= mca_btl_openib_component.rd_win &&
OPAL_THREAD_ADD32(&endpoint->sd_credits_lp, 1) == 1) {
mca_btl_openib_endpoint_send_credits_lp(endpoint);
}
#ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ
}
#endif
count++;
break;
default:
BTL_ERROR(("Unhandled work completion opcode is %d", wc.opcode));
break;
}
}
}
return count;
}
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