static void *mca_oob_ud_complete_dispatch(int fd, int flags, void *context)
{
mca_oob_ud_req_t *req;
OPAL_THREAD_LOCK(&mca_oob_ud_component.ud_match_lock);
while (NULL !=
(req = (mca_oob_ud_req_t *) opal_list_remove_first (&mca_oob_ud_component.ud_event_queued_reqs))) {
OPAL_THREAD_UNLOCK(&mca_oob_ud_component.ud_match_lock);
OPAL_OUTPUT_VERBOSE((10, mca_oob_base_output, "%s oob:ud:event_process processing request %p",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), (void *) req));
req->req_list = NULL;
switch (req->type) {
case MCA_OOB_UD_REQ_RECV:
case MCA_OOB_UD_REQ_UNEX:
if (req->state == MCA_OOB_UD_REQ_COMPLETE) {
mca_oob_ud_recv_complete (req);
} else {
mca_oob_ud_req_append_to_list (req, &mca_oob_ud_component.ud_active_recvs);
mca_oob_ud_recv_try (req);
}
break;
case MCA_OOB_UD_REQ_SEND:
if (req->state == MCA_OOB_UD_REQ_COMPLETE) {
mca_oob_ud_send_complete (req, ORTE_SUCCESS);
} else {
mca_oob_ud_req_append_to_list (req, &mca_oob_ud_component.ud_active_sends);
mca_oob_ud_send_try (req);
}
break;
default:
break;
}
OPAL_THREAD_LOCK(&mca_oob_ud_component.ud_match_lock);
}
return NULL;
}
int mca_oob_ud_send_try (mca_oob_ud_req_t *send_req) {
int wr_index, wr_count, sge_count, sge_index, iov_index;
unsigned int iov_left, iov_offset, packet_size;
const unsigned int mtu = send_req->req_mtu;
const struct timeval aquire_timeout = {0, 500000};
mca_oob_ud_msg_t *com_msg;
int data_len;
int rc = ORTE_SUCCESS;
opal_output_verbose(10, orte_oob_base_framework.framework_output,
"%s oob:ud:send_try sending to %s, tag = %d, "
"req = %p",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
ORTE_NAME_PRINT(&send_req->req_peer->peer_name),
send_req->req_tag, (void *) send_req);
do {
if (NULL == send_req->req_qp) {
rc = mca_oob_ud_qp_data_aquire (send_req->req_port, &send_req->req_qp);
if (ORTE_SUCCESS != rc) {
break;
}
}
(void) mca_oob_ud_qp_purge (send_req->req_qp);
rc = mca_oob_ud_msg_get (send_req->req_port, send_req, send_req->req_qp, send_req->req_peer, false,
&com_msg);
if (ORTE_SUCCESS != rc) {
break;
}
if (MCA_OOB_UD_REQ_IOV == send_req->req_data_type) {
if (NULL == send_req->req_data.iov.mr) {
/* allocate space for memory registers */
send_req->req_data.iov.mr = (struct ibv_mr **) calloc (send_req->req_data.iov.count, sizeof (struct ibv_mr *));
if (NULL == send_req->req_data.iov.mr) {
rc = ORTE_ERR_OUT_OF_RESOURCE;
ORTE_ERROR_LOG(rc);
break;
}
}
rc = mca_oob_ud_register_iov (send_req->req_data.iov.uiov, send_req->req_data.iov.count,
send_req->req_data.iov.mr, send_req->req_port->device->ib_pd,
mtu, &sge_count, &wr_count, &data_len);
if (ORTE_SUCCESS != rc) {
break;
}
} else {
data_len = send_req->req_data.buf.size;
rc = mca_oob_ud_register_buf(send_req->req_data.buf.p, send_req->req_data.buf.size,
&send_req->req_data.buf.mr, send_req->req_port->device->ib_pd,
mtu, &sge_count, &wr_count);
if (ORTE_SUCCESS != rc) {
break;
}
}
wr_count = (data_len + mtu - 1) / mtu;
if (data_len > 0) {
data_len = data_len + 0;
}
if (MCA_OOB_UD_REQ_IOV == send_req->req_data_type) {
opal_output_verbose(5, orte_oob_base_framework.framework_output,
"%s oob:ud:send_try sending %d bytes in %d "
"work requests, %d sges. uiov = %p.", ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), data_len,
wr_count, sge_count, (void *) send_req->req_data.iov.uiov);
} else {
opal_output_verbose(5, orte_oob_base_framework.framework_output,
"%s oob:ud:send_try sending %d bytes in %d "
"work requests, %d sges. buf = %p", ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), data_len,
wr_count, sge_count, (void *) send_req->req_data.buf.p);
}
if (wr_count && NULL == send_req->req_wr.send) {
send_req->req_wr.send = (struct ibv_send_wr *) calloc (wr_count, sizeof (struct ibv_send_wr));
if (NULL == send_req->req_wr.send) {
rc = ORTE_ERR_OUT_OF_RESOURCE;
ORTE_ERROR_LOG(rc);
break;
}
}
if (wr_count && NULL == send_req->req_sge) {
send_req->req_sge = (struct ibv_sge *) calloc (sge_count, sizeof (struct ibv_sge));
if (NULL == send_req->req_sge) {
rc = ORTE_ERR_OUT_OF_RESOURCE;
ORTE_ERROR_LOG(rc);
break;
}
}
if (MCA_OOB_UD_REQ_IOV == send_req->req_data_type) {
opal_output_verbose(10, orte_oob_base_framework.framework_output,
"%s oob:ud:send_try posting message using iovec",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME));
iov_left = send_req->req_data.iov.uiov[0].iov_len;
iov_offset = 0;
iov_index = 0;
for (wr_index = 0, sge_index = 0 ; wr_index < wr_count ; ++wr_index) {
int sge_first = sge_index;
packet_size = 0;
do {
int to_send = min (iov_left, mtu - packet_size);
mca_oob_ud_fill_sge(send_req->req_sge + sge_index++,
(char *)send_req->req_data.iov.uiov[iov_index].iov_base + iov_offset,
to_send, send_req->req_data.iov.mr[iov_index]->lkey);
iov_offset += to_send;
iov_left -= to_send;
packet_size += to_send;
if (0 == iov_left) {
iov_index++;
iov_offset = 0;
if (iov_index < send_req->req_data.iov.count) {
iov_left = send_req->req_data.iov.uiov[iov_index].iov_len;
}
}
} while ((packet_size < mtu) && (iov_left > 0));
mca_oob_ud_fill_send_wr(send_req->req_wr.send + wr_index,
send_req->req_sge + sge_first,
sge_index - sge_first, send_req->req_peer);
/* we don't care about completions for data */
send_req->req_wr.send[wr_index].send_flags = IBV_SEND_SOLICITED;
/* sequence number */
send_req->req_wr.send[wr_index].imm_data = wr_index;
send_req->req_wr.send[wr_index].wr.ud.remote_qpn = send_req->req_rem_qpn;
send_req->req_wr.send[wr_index].opcode = IBV_WR_SEND_WITH_IMM;
if (wr_index + 1 < wr_count) {
send_req->req_wr.send[wr_index].next = send_req->req_wr.send + wr_index + 1;
}
}
} else {//data is in buffer
unsigned int buffer_offset = 0;
unsigned int buffer_size = send_req->req_data.buf.size;
opal_output_verbose(10, orte_oob_base_framework.framework_output,
"%s oob:ud:send_try posting message using buffer",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME));
for (wr_index = 0, sge_index = 0 ; wr_index < wr_count ; ++wr_index) {
int sge_first = sge_index;
packet_size = 0;
do {
int to_send = min (buffer_size, mtu - packet_size);
mca_oob_ud_fill_sge(send_req->req_sge + sge_index++,
(char *)send_req->req_data.buf.p + buffer_offset,
to_send, send_req->req_data.buf.mr->lkey);
buffer_offset += to_send;
buffer_size -= to_send;
packet_size += to_send;
} while ((packet_size < mtu) && (buffer_size > 0));
mca_oob_ud_fill_send_wr(send_req->req_wr.send + wr_index,
send_req->req_sge + sge_first,
sge_index - sge_first, send_req->req_peer);
/* we don't care about completions for data */
send_req->req_wr.send[wr_index].send_flags = IBV_SEND_SOLICITED;
/* sequence number */
send_req->req_wr.send[wr_index].imm_data = wr_index;
send_req->req_wr.send[wr_index].wr.ud.remote_qpn = send_req->req_rem_qpn;
send_req->req_wr.send[wr_index].opcode = IBV_WR_SEND_WITH_IMM;
opal_output_verbose(10, orte_oob_base_framework.framework_output,
"%s oob:ud:send_try imm_data = %d",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), wr_index);
if (wr_index + 1 < wr_count) {
send_req->req_wr.send[wr_index].next = send_req->req_wr.send + wr_index + 1;
}
}
}
/* send data */
rc = mca_oob_ud_qp_post_send (send_req->req_qp, send_req->req_wr.send, 0);
if (ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
break;
}
opal_output_verbose(10, orte_oob_base_framework.framework_output,
"%s oob:ud:send_try posting completion message",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME));
/* Fill in completion message. This message will go to the peers listen QP but
must originate from our data qp to ensure that it is sent last. */
com_msg->hdr->msg_type = MCA_OOB_UD_MSG_COMPLETE;
com_msg->hdr->msg_lcl_ctx = send_req->req_rem_ctx;
com_msg->hdr->msg_rem_ctx = send_req;
/* send message header */
rc = mca_oob_ud_msg_post_send (com_msg);
/* post_send already returned the message */
com_msg = NULL;
} while (0);
if (ORTE_ERR_TEMP_OUT_OF_RESOURCE == rc) {
/* set timer to retry post */
mca_oob_ud_req_timer_set (send_req, &aquire_timeout, 1, mca_oob_ud_send_try_to);
rc = ORTE_SUCCESS;
}
if (ORTE_SUCCESS != rc) {
ORTE_ERROR_LOG(rc);
/* damn */
return mca_oob_ud_send_complete (send_req, rc);
}
send_req->state = MCA_OOB_UD_REQ_ACTIVE;
return rc;
}
static void mca_oob_ud_send_cb (mca_oob_ud_msg_t *msg, int rc)
{
mca_oob_ud_send_complete (msg->req, rc);
}