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Adhered to coding style

This commit is contained in:
Dennis Potter 2018-07-04 19:04:08 +02:00
parent fb482439c4
commit 781f405a48
4 changed files with 108 additions and 161 deletions

View file

@ -28,4 +28,4 @@ struct memory_ib {
struct memory_type *parent;
};
struct ibv_mr* memory_ib_get_mr(struct sample *smps);
struct ibv_mr * memory_ib_get_mr(struct sample *smps);

View file

@ -35,13 +35,12 @@
#include <villas/queue_signalled.h>
#include <rdma/rdma_cma.h>
/* Function poitner typedefs */
typedef void (*ib_on_completion)(struct node*, struct ibv_wc*, int*);
typedef void* (*ib_poll_function)(void*);
/* Function pointer typedefs */
typedef void (*ib_on_completion) (struct node*, struct ibv_wc*, int*);
typedef void * (*ib_poll_function) (void*);
/* Enums */
enum poll_mode_e
{
enum poll_mode_e {
EVENT,
BUSY
};
@ -63,6 +62,7 @@ struct infiniband {
struct ibv_cq *send_cq;
struct ibv_comp_channel *comp_channel;
} ctx;
/* Work Completion related */
struct poll_s {
enum poll_mode_e poll_mode;
@ -108,7 +108,7 @@ struct infiniband {
/* Misc settings */
int is_source;
int cq_size;
int cq_size;
};
/** @see node_type::reverse */

View file

@ -35,7 +35,7 @@ struct ibv_mr * memory_ib_get_mr(struct sample *smps)
p = sample_pool(smps);
ma = memory_get_allocation((char *)(p)+p->buffer_off);
ma = memory_get_allocation((char *) (p) + p->buffer_off);
mr = ma->ib.mr;
return mr;
}

View file

@ -45,7 +45,7 @@ int ib_cleanup(struct node *n)
// Deregister memory regions
ibv_dereg_mr(ib->mem.mr_recv);
if(ib->is_source)
if (ib->is_source)
ibv_dereg_mr(ib->mem.mr_send);
info("Deregistered memory regions");
@ -73,12 +73,12 @@ int ib_post_recv_wrs(struct node *n)
struct ibv_sge sge;
// Prepare receive Scatter/Gather element
sge.addr = (uintptr_t)pool_get(&ib->mem.p_recv);
sge.addr = (uintptr_t) pool_get(&ib->mem.p_recv);
sge.length = ib->mem.p_recv.blocksz;
sge.lkey = ib->mem.mr_recv->lkey;
// Prepare a receive Work Request
wr.wr_id = (uintptr_t)sge.addr;
wr.wr_id = (uintptr_t) sge.addr;
wr.next = NULL;
wr.sg_list = &sge;
wr.num_sge = 1;
@ -93,40 +93,35 @@ void ib_completion_target(struct node* n, struct ibv_wc* wc, int* size){}
void ib_completion_source(struct node* n, struct ibv_wc* wc, int* size)
{
struct infiniband *ib = (struct infiniband *)((struct node *)n)->_vd;
struct infiniband *ib = (struct infiniband *) ((struct node *) n)->_vd;
for(int i=0; i<*size; i++)
{
for (int i = 0; i < *size; i++) {
//On disconnect, the QP set to error state and will be flushed
if(wc[i].status == IBV_WC_WR_FLUSH_ERR)
{
if (wc[i].status == IBV_WC_WR_FLUSH_ERR) {
ib->poll.stopThread = 1;
return;
}
if(wc[i].status != IBV_WC_SUCCESS)
{
if (wc[i].status != IBV_WC_SUCCESS)
warn("Work Completion status was not IBV_WC_SUCCES in node %s: %i",
node_name(n), wc[i].status);
}
sample_put((struct sample*)(wc[i].wr_id));
sample_put((struct sample*) wc[i].wr_id);
}
}
void * ib_event_thread(void *n)
{
struct infiniband *ib = (struct infiniband *)((struct node *)n)->_vd;
struct infiniband *ib = (struct infiniband *) ((struct node *) n)->_vd;
struct ibv_wc wc[ib->cq_size];
int size;
while(1)
{
while (1) {
// Function blocks, until an event occurs
ibv_get_cq_event(ib->ctx.comp_channel, &ib->ctx.send_cq, NULL);
// Poll as long as WCs are available
while((size = ibv_poll_cq(ib->ctx.send_cq, ib->cq_size, wc)))
while ((size = ibv_poll_cq(ib->ctx.send_cq, ib->cq_size, wc)))
ib->poll.on_compl(n, wc, &size);
// Request a new event in the CQ and acknowledge event
@ -137,17 +132,16 @@ void * ib_event_thread(void *n)
void * ib_busy_poll_thread(void *n)
{
struct infiniband *ib = (struct infiniband *)((struct node *)n)->_vd;
struct infiniband *ib = (struct infiniband *) ((struct node *) n)->_vd;
struct ibv_wc wc[ib->cq_size];
int size;
while(1)
{
while (1) {
// Poll as long as WCs are available
while((size = ibv_poll_cq(ib->ctx.send_cq, ib->cq_size, wc)))
while ((size = ibv_poll_cq(ib->ctx.send_cq, ib->cq_size, wc)))
ib->poll.on_compl(n, wc, &size);
if(ib->poll.stopThread)
if (ib->poll.stopThread)
return NULL;
}
}
@ -158,11 +152,10 @@ static void ib_init_wc_poll(struct node *n)
struct infiniband *ib = (struct infiniband *) n->_vd;
ib->ctx.comp_channel = NULL;
if(ib->poll.poll_mode == EVENT)
{
if (ib->poll.poll_mode == EVENT) {
// Create completion channel
ib->ctx.comp_channel = ibv_create_comp_channel(ib->ctx.id->verbs);
if(!ib->ctx.comp_channel)
if (!ib->ctx.comp_channel)
error("Could not create completion channel in node %s.", node_name(n));
}
@ -172,7 +165,7 @@ static void ib_init_wc_poll(struct node *n)
NULL,
NULL,
0);
if(!ib->ctx.recv_cq)
if (!ib->ctx.recv_cq)
error("Could not create receive completion queue in node %s.", node_name(n));
ib->ctx.send_cq = ibv_create_cq(ib->ctx.id->verbs,
@ -180,27 +173,23 @@ static void ib_init_wc_poll(struct node *n)
NULL,
ib->ctx.comp_channel,
0);
if(!ib->ctx.send_cq)
if (!ib->ctx.send_cq)
error("Could not create send completion queue in node %s.", node_name(n));
if(ib->poll.poll_mode == EVENT)
{
if (ib->poll.poll_mode == EVENT) {
// Request notifications from completion queue
ret = ibv_req_notify_cq(ib->ctx.send_cq, 0);
if(ret)
if (ret)
error("Failed to request notifiy CQ in node %s: %s",
node_name(n), gai_strerror(ret));
}
// Initialize polling pthread for source
if(ib->is_source)
{
if (ib->is_source) {
ret = pthread_create(&ib->poll.cq_poller_thread, NULL, ib->poll.poll_func, n);
if(ret)
{
if (ret)
error("Failed to create poll thread of node %s: %s",
node_name(n), gai_strerror(ret));
}
}
}
@ -211,7 +200,7 @@ static void ib_build_ibv(struct node *n)
//Allocate protection domain
ib->ctx.pd = ibv_alloc_pd(ib->ctx.id->verbs);
if(!ib->ctx.pd)
if (!ib->ctx.pd)
error("Could not allocate protection domain in node %s.", node_name(n));
info("Allocated Protection Domain");
@ -226,7 +215,7 @@ static void ib_build_ibv(struct node *n)
// Create the actual QP
ret = rdma_create_qp(ib->ctx.id, ib->ctx.pd, &ib->qp_init);
if(ret)
if (ret)
error("Failed to create Queue Pair in node %s.", node_name(n));
info("Created Queue Pair with %i receive and %i send elements.",
@ -241,11 +230,9 @@ static void ib_build_ibv(struct node *n)
ib->qp_init.cap.max_recv_wr,
SAMPLE_DATA_LEN(DEFAULT_SAMPLELEN),
&memory_type_heap);
if(ret)
{
if (ret)
error("Failed to init recv memory pool of node %s: %s",
node_name(n), gai_strerror(ret));
}
//ToDo: initialize r_addr_key struct if mode is RDMA
@ -256,14 +243,12 @@ static void ib_build_ibv(struct node *n)
(char*)&ib->mem.p_recv+ib->mem.p_recv.buffer_off,
ib->mem.p_recv.len,
IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE);
if(!ib->mem.mr_recv) {
if (!ib->mem.mr_recv)
error("Failed to register mr_recv with ibv_reg_mr of node %s.",
node_name(n));
}
info("Allocated receive memory.");
if(ib->is_source)
{
if (ib->is_source) {
ib->mem.p_send.state = STATE_DESTROYED;
ib->mem.p_send.queue.state = STATE_DESTROYED;
@ -272,11 +257,9 @@ static void ib_build_ibv(struct node *n)
ib->qp_init.cap.max_send_wr,
sizeof(double),
&memory_type_heap);
if(ret)
{
if (ret)
error("Failed to init send memory of node %s: %s",
node_name(n), gai_strerror(ret));
}
//ToDo: initialize r_addr_key struct if mode is RDMA
@ -287,10 +270,10 @@ static void ib_build_ibv(struct node *n)
(char*)&ib->mem.p_send+ib->mem.p_send.buffer_off,
ib->mem.p_send.len,
IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE);
if(!ib->mem.mr_send) {
if (!ib->mem.mr_send)
error("Failed to register mr_send with ibv_reg_mr of node %s.",
node_name(n));
}
info("Allocated send memory.");
}
}
@ -307,7 +290,7 @@ static int ib_addr_resolved(struct node *n)
// Resolve address
ret = rdma_resolve_route(ib->ctx.id, ib->conn.timeout);
if(ret)
if (ret)
error("Failed to resolve route in node %s.", node_name(n));
return 0;
@ -325,7 +308,7 @@ static int ib_route_resolved(struct node *n)
// Send connection request
ret = rdma_connect(ib->ctx.id, &cm_params);
if(ret)
if (ret)
error("Failed to connect in node %s.", node_name(n));
info("Called rdma_connect.");
@ -347,7 +330,7 @@ static int ib_connect_request(struct node *n, struct rdma_cm_id *id)
// Accept connection request
ret = rdma_accept(ib->ctx.id, &cm_params);
if(ret)
if (ret)
error("Failed to connect in node %s.", node_name(n));
info("Successfully accepted connection request.");
@ -359,8 +342,7 @@ static int ib_event(struct node *n, struct rdma_cm_event *event)
{
int ret = 0;
switch(event->event)
{
switch(event->event) {
case RDMA_CM_EVENT_ADDR_RESOLVED:
ret = ib_addr_resolved(n);
break;
@ -386,8 +368,7 @@ static int ib_event(struct node *n, struct rdma_cm_event *event)
ret = ib_cleanup(n);
break;
default:
error("Unknown event occurred: %u",
event->event);
error("Unknown event occurred: %u", event->event);
}
return ret;
@ -426,28 +407,26 @@ int ib_parse(struct node *n, json_t *cfg)
"max_send_wr", &max_send_wr,
"max_recv_wr", &max_recv_wr
);
if(ret)
if (ret)
jerror(&err, "Failed to parse configuration of node %s", node_name(n));
// Translate IP:PORT to a struct addrinfo
char* ip_adr = strtok(local, ":");
char* port = strtok(NULL, ":");
ret = getaddrinfo(ip_adr, port, NULL, &ib->conn.src_addr);
if(ret)
{
if (ret)
error("Failed to resolve local address '%s' of node %s: %s",
local, node_name(n), gai_strerror(ret));
}
// Translate port space
if(strcmp(port_space, "RDMA_PS_IPOIB") == 0) ib->conn.port_space = RDMA_PS_IPOIB;
else if(strcmp(port_space, "RDMA_PS_TCP") == 0) ib->conn.port_space = RDMA_PS_TCP;
else if(strcmp(port_space, "RDMA_PS_UDP") == 0) ib->conn.port_space = RDMA_PS_UDP;
else if(strcmp(port_space, "RDMA_PS_IB") == 0) ib->conn.port_space = RDMA_PS_IB;
else {
if (strcmp(port_space, "RDMA_PS_IPOIB") == 0) ib->conn.port_space = RDMA_PS_IPOIB;
else if (strcmp(port_space, "RDMA_PS_TCP") == 0) ib->conn.port_space = RDMA_PS_TCP;
else if (strcmp(port_space, "RDMA_PS_UDP") == 0) ib->conn.port_space = RDMA_PS_UDP;
else if (strcmp(port_space, "RDMA_PS_IB") == 0) ib->conn.port_space = RDMA_PS_IB;
else
error("Failed to translate rdma_port_space in node %s. %s is not a valid \
port space supported by rdma_cma.h!", node_name(n), port_space);
}
// Set timeout
ib->conn.timeout = timeout;
@ -455,44 +434,40 @@ int ib_parse(struct node *n, json_t *cfg)
n->in.vectorize = 256;
// Translate poll mode
if(strcmp(poll_mode, "EVENT") == 0)
{
if (strcmp(poll_mode, "EVENT") == 0) {
ib->poll.poll_mode = EVENT;
ib->poll.poll_func = ib_event_thread;
}
else if(strcmp(poll_mode, "BUSY") == 0)
{
else if (strcmp(poll_mode, "BUSY") == 0) {
ib->poll.poll_mode = BUSY;
ib->poll.poll_func = ib_busy_poll_thread;
}
else
{
error("Failed to translate poll_mode in node %s. %s is not a valid \
poll mode!", node_name(n), poll_mode);
}
// Set completion queue size
ib->cq_size = cq_size;
// Translate QP type
if(strcmp(qp_type, "IBV_QPT_RC") == 0) ib->qp_init.qp_type = IBV_QPT_RC;
else if(strcmp(qp_type, "IBV_QPT_UC") == 0) ib->qp_init.qp_type = IBV_QPT_UC;
else if(strcmp(qp_type, "IBV_QPT_UD") == 0) ib->qp_init.qp_type = IBV_QPT_UD;
else {
error("Failed to translate qp_type in node %s. %s is not a valid \
qp_type!", node_name(n), qp_type);
}
if (strcmp(qp_type, "IBV_QPT_RC") == 0) ib->qp_init.qp_type = IBV_QPT_RC;
else if (strcmp(qp_type, "IBV_QPT_UC") == 0) ib->qp_init.qp_type = IBV_QPT_UC;
else if (strcmp(qp_type, "IBV_QPT_UD") == 0) ib->qp_init.qp_type = IBV_QPT_UD;
else
error("Failed to translate qp_type in node %s. %s is not a valid \
qp_type!", node_name(n), qp_type);
// Set max. send and receive Work Requests
// First check if the set value is a power of 2, and warn the user if this is not the case
int max_send_pow = (int) pow(2, ceil(log2(max_send_wr)));
int max_recv_pow = (int) pow(2, ceil(log2(max_recv_wr)));
if(max_send_wr != max_send_pow)
if (max_send_wr != max_send_pow)
warn("Max. number of send WRs (%i) is not a power of 2! The HCA will change this to a power of 2: %i",
max_send_wr, max_send_pow);
if(max_recv_wr != max_recv_pow)
if (max_recv_wr != max_recv_pow)
warn("Max. number of recv WRs (%i) is not a power of 2! The HCA will change this to a power of 2: %i",
max_recv_wr, max_recv_pow);
@ -507,25 +482,22 @@ int ib_parse(struct node *n, json_t *cfg)
ib->qp_init.cap.max_recv_sge = 1;
//Check if node is a source and connect to target
if(remote)
{
if (remote) {
ib->is_source = 1;
// Translate address info
char* ip_adr = strtok(remote, ":");
char* port = strtok(NULL, ":");
ret = getaddrinfo(ip_adr, port, NULL, &ib->conn.dst_addr);
if(ret)
{
if (ret)
error("Failed to resolve remote address '%s' of node %s: %s",
remote, node_name(n), gai_strerror(ret));
}
// Set correct Work Completion function
ib->poll.on_compl = ib_completion_source;
}
else
{
else {
ib->is_source = 0;
// Set correct Work Completion function
@ -547,14 +519,12 @@ int ib_destroy(struct node *n)
void * ib_disconnect_thread(void *n)
{
struct node *node = (struct node *)n;
struct infiniband *ib = (struct infiniband *)((struct node *)n)->_vd;
struct node *node = (struct node *) n;
struct infiniband *ib = (struct infiniband *) node->_vd;
struct rdma_cm_event *event;
while(rdma_get_cm_event(ib->ctx.ec, &event) == 0)
{
if(event->event == RDMA_CM_EVENT_DISCONNECTED)
{
while (rdma_get_cm_event(ib->ctx.ec, &event) == 0) {
if (event->event == RDMA_CM_EVENT_DISCONNECTED) {
rdma_ack_cm_event(event);
ib->conn.rdma_disconnect_called = 1;
@ -573,41 +543,35 @@ int ib_start(struct node *n)
// Create event channel
ib->ctx.ec = rdma_create_event_channel();
if(!ib->ctx.ec)
if (!ib->ctx.ec)
error("Failed to create event channel in node %s!", node_name(n));
ret = rdma_create_id(ib->ctx.ec, &ib->ctx.id, NULL, ib->conn.port_space);
if(ret)
{
if (ret)
error("Failed to create rdma_cm_id of node %s: %s",
node_name(n), gai_strerror(ret));
}
info("Succesfully created rdma_cm_id.");
// Bind rdma_cm_id to the HCA
ret = rdma_bind_addr(ib->ctx.id, ib->conn.src_addr->ai_addr);
if(ret)
{
if (ret)
error("Failed to bind to local device of node %s: %s",
node_name(n), gai_strerror(ret));
}
info("Bound rdma_cm_id to Infiniband device.");
if(ib->is_source)
{
if (ib->is_source) {
// Resolve address
ret = rdma_resolve_addr(ib->ctx.id,
NULL,
ib->conn.dst_addr->ai_addr,
ib->conn.timeout);
if(ret)
{
if (ret)
error("Failed to resolve remote address after %ims of node %s: %s",
ib->conn.timeout, node_name(n), gai_strerror(ret));
}
}
else
{
else {
// The ID will be overwritten for the target. If the event type is
// RDMA_CM_EVENT_CONNECT_REQUEST, >then this references a new id for
// that communication.
@ -615,7 +579,7 @@ int ib_start(struct node *n)
// Listen on rdma_cm_id for events
ret = rdma_listen(ib->ctx.listen_id, 10);
if(ret)
if (ret)
error("Failed to listen to rdma_cm_id on node %s", node_name(n));
}
@ -623,23 +587,21 @@ int ib_start(struct node *n)
// sure the nodes are succesfully connected.
info("Starting to monitor events on rdma_cm_id.");
while(rdma_get_cm_event(ib->ctx.ec, &event) == 0)
{
while (rdma_get_cm_event(ib->ctx.ec, &event) == 0) {
struct rdma_cm_event event_copy;
memcpy(&event_copy, event, sizeof(*event));
rdma_ack_cm_event(event);
if(ib_event(n, &event_copy))
if (ib_event(n, &event_copy))
break;
}
ret = pthread_create(&ib->conn.stop_thread, NULL, ib_disconnect_thread, n);
if(ret)
{
if (ret)
error("Failed to create thread to monitor disconnects in node %s: %s",
node_name(n), gai_strerror(ret));
}
return 0;
}
@ -654,21 +616,17 @@ int ib_stop(struct node *n)
// Will flush all outstanding WRs to the Completion Queue and
// will call RDMA_CM_EVENT_DISCONNECTED if that is done.
ret = rdma_disconnect(ib->ctx.id);
if(ret)
{
if (ret)
error("Error while calling rdma_disconnect in node %s: %s",
node_name(n), gai_strerror(ret));
}
info("Called rdma_disconnect.");
// If disconnected event already occured, directly call cleanup function
if(ib->conn.rdma_disconnect_called)
{
if (ib->conn.rdma_disconnect_called)
ib_cleanup(n);
}
// Else, wait for event to occur
else
{
else {
// Else, wait for event to occur
ib->conn.rdma_disconnect_called = 1;
rdma_get_cm_event(ib->ctx.ec, &event);
@ -696,40 +654,36 @@ int ib_read(struct node *n, struct sample *smps[], unsigned cnt)
struct ibv_wc wc[n->in.vectorize];
struct ibv_recv_wr wr[cnt], *bad_wr = NULL;
struct ibv_sge sge[cnt];
struct ibv_mr * mr;
struct ibv_mr *mr;
int ret;
if(ib->conn.available_recv_wrs <= ib->qp_init.cap.max_recv_wr && cnt==n->in.vectorize)
{
if (ib->conn.available_recv_wrs <= ib->qp_init.cap.max_recv_wr && cnt==n->in.vectorize) {
// Get Memory Region
mr = memory_ib_get_mr(smps[0]);
for(int i=0; i<cnt; i++)
{
for (int i = 0; i < cnt; i++) {
// Increase refcnt of sample
sample_get(smps[i]);
// Prepare receive Scatter/Gather element
sge[i].addr = (uint64_t)&smps[i]->data;
sge[i].addr = (uint64_t) &smps[i]->data;
sge[i].length = SAMPLE_DATA_LEN(DEFAULT_SAMPLELEN);
sge[i].lkey = mr->lkey;
// Prepare a receive Work Request
wr[i].wr_id = (uintptr_t)smps[i];
wr[i].wr_id = (uintptr_t) smps[i];
wr[i].next = &wr[i+1];
wr[i].sg_list = &sge[i];
wr[i].num_sge = 1;
ib->conn.available_recv_wrs++;
if(ib->conn.available_recv_wrs == ib->qp_init.cap.max_recv_wr || i==(cnt-1))
{
if (ib->conn.available_recv_wrs == ib->qp_init.cap.max_recv_wr || i==(cnt-1)) {
wr[i].next = NULL;
break;
}
}
// Post list of Work Requests
ret = ibv_post_recv(ib->ctx.id->qp, &wr[0], &bad_wr);
@ -738,25 +692,20 @@ int ib_read(struct node *n, struct sample *smps[], unsigned cnt)
// Poll Completion Queue
ret = ibv_poll_cq(ib->ctx.recv_cq, n->in.vectorize, wc);
if(ret)
{
if (ret) {
ib->conn.available_recv_wrs -= ret;
for(int i=0; i<ret; i++)
{
if(wc[i].status == IBV_WC_WR_FLUSH_ERR)
{
for (int i = 0; i < ret; i++) {
if (wc[i].status == IBV_WC_WR_FLUSH_ERR) {
//ToDo: create debug entry
ret = 0;
}
else if(wc[i].status != IBV_WC_SUCCESS)
{
else if (wc[i].status != IBV_WC_SUCCESS) {
warn("Work Completion status was not IBV_WC_SUCCES in node %s: %i",
node_name(n), wc[i].status);
ret = 0;
}
else if(wc[i].opcode & IBV_WC_RECV)
{
else if (wc[i].opcode & IBV_WC_RECV) {
smps[i] = (struct sample*)(wc[i].wr_id);
smps[i]->length = wc[i].byte_len/sizeof(double);
}
@ -776,7 +725,7 @@ int ib_write(struct node *n, struct sample *smps[], unsigned cnt)
struct infiniband *ib = (struct infiniband *) n->_vd;
struct ibv_send_wr wr[cnt], *bad_wr = NULL;
struct ibv_sge sge[cnt];
struct ibv_mr * mr;
struct ibv_mr *mr;
int ret;
memset(&wr, 0, sizeof(wr));
@ -787,8 +736,7 @@ int ib_write(struct node *n, struct sample *smps[], unsigned cnt)
// Get Memory Region
mr = memory_ib_get_mr(smps[0]);
for(int i=0; i<cnt; i++)
{
for (int i = 0; i < cnt; i++) {
// Increase refcnt of sample
sample_get(smps[i]);
@ -802,20 +750,19 @@ int ib_write(struct node *n, struct sample *smps[], unsigned cnt)
wr[i].sg_list = &sge[i];
wr[i].num_sge = 1;
if(i == (cnt-1))
wr[i].next = NULL;
if (i == (cnt-1))
wr[i].next = NULL;
else
wr[i].next = &wr[i+1];
wr[i].next = &wr[i+1];
wr[i].send_flags = IBV_SEND_SIGNALED | (send_inline<<3);
wr[i].send_flags = IBV_SEND_SIGNALED | (send_inline << 3);
wr[i].imm_data = htonl(0); //ToDo: set this to a useful value
wr[i].opcode = IBV_WR_SEND_WITH_IMM;
}
//Send linked list of Work Requests
ret = ibv_post_send(ib->ctx.id->qp, wr, &bad_wr);
if(ret)
{
if (ret) {
error("Failed to send message in node %s: %s",
node_name(n), gai_strerror(ret));