blob: e1fb380a044c6680ee03e4b2a526164495a6aaf7 [file] [log] [blame]
/*
* RDMA I/O engine
*
* RDMA I/O engine based on the IB verbs and RDMA/CM user space libraries.
* Supports both RDMA memory semantics and channel semantics
* for the InfiniBand, RoCE and iWARP protocols.
*
* You will need the Linux RDMA software installed, either
* from your Linux distributor or directly from openfabrics.org:
*
* http://www.openfabrics.org/downloads/OFED/
*
* Exchanging steps of RDMA ioengine control messages:
* 1. client side sends test mode (RDMA_WRITE/RDMA_READ/SEND)
* to server side.
* 2. server side parses test mode, and sends back confirmation
* to client side. In RDMA WRITE/READ test, this confirmation
* includes memory information, such as rkey, address.
* 3. client side initiates test loop.
* 4. In RDMA WRITE/READ test, client side sends a completion
* notification to server side. Server side updates its
* td->done as true.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <byteswap.h>
#include <pthread.h>
#include <inttypes.h>
#include "../fio.h"
#include "../hash.h"
#include <rdma/rdma_cma.h>
#include <infiniband/arch.h>
#define FIO_RDMA_MAX_IO_DEPTH 512
enum rdma_io_mode {
FIO_RDMA_UNKNOWN = 0,
FIO_RDMA_MEM_WRITE,
FIO_RDMA_MEM_READ,
FIO_RDMA_CHA_SEND,
FIO_RDMA_CHA_RECV
};
struct remote_u {
uint64_t buf;
uint32_t rkey;
uint32_t size;
};
struct rdma_info_blk {
uint32_t mode; /* channel semantic or memory semantic */
uint32_t nr; /* client: io depth
server: number of records for memory semantic
*/
struct remote_u rmt_us[FIO_RDMA_MAX_IO_DEPTH];
};
struct rdma_io_u_data {
uint64_t wr_id;
struct ibv_send_wr sq_wr;
struct ibv_recv_wr rq_wr;
struct ibv_sge rdma_sgl;
};
struct rdmaio_data {
int is_client;
enum rdma_io_mode rdma_protocol;
char host[64];
struct sockaddr_in addr;
struct ibv_recv_wr rq_wr;
struct ibv_sge recv_sgl;
struct rdma_info_blk recv_buf;
struct ibv_mr *recv_mr;
struct ibv_send_wr sq_wr;
struct ibv_sge send_sgl;
struct rdma_info_blk send_buf;
struct ibv_mr *send_mr;
struct ibv_comp_channel *channel;
struct ibv_cq *cq;
struct ibv_pd *pd;
struct ibv_qp *qp;
pthread_t cmthread;
struct rdma_event_channel *cm_channel;
struct rdma_cm_id *cm_id;
struct rdma_cm_id *child_cm_id;
int cq_event_num;
struct remote_u *rmt_us;
int rmt_nr;
struct io_u **io_us_queued;
int io_u_queued_nr;
struct io_u **io_us_flight;
int io_u_flight_nr;
struct io_u **io_us_completed;
int io_u_completed_nr;
struct frand_state rand_state;
};
static int client_recv(struct thread_data *td, struct ibv_wc *wc)
{
struct rdmaio_data *rd = td->io_ops->data;
if (wc->byte_len != sizeof(rd->recv_buf)) {
log_err("Received bogus data, size %d\n", wc->byte_len);
return 1;
}
/* store mr info for MEMORY semantic */
if ((rd->rdma_protocol == FIO_RDMA_MEM_WRITE) ||
(rd->rdma_protocol == FIO_RDMA_MEM_READ)) {
/* struct flist_head *entry; */
int i = 0;
rd->rmt_nr = ntohl(rd->recv_buf.nr);
for (i = 0; i < rd->rmt_nr; i++) {
rd->rmt_us[i].buf = ntohll(rd->recv_buf.rmt_us[i].buf);
rd->rmt_us[i].rkey = ntohl(rd->recv_buf.rmt_us[i].rkey);
rd->rmt_us[i].size = ntohl(rd->recv_buf.rmt_us[i].size);
dprint(FD_IO,
"fio: Received rkey %x addr %" PRIx64
" len %d from peer\n", rd->rmt_us[i].rkey,
rd->rmt_us[i].buf, rd->rmt_us[i].size);
}
}
return 0;
}
static int server_recv(struct thread_data *td, struct ibv_wc *wc)
{
struct rdmaio_data *rd = td->io_ops->data;
if (wc->wr_id == FIO_RDMA_MAX_IO_DEPTH) {
rd->rdma_protocol = ntohl(rd->recv_buf.mode);
/* CHANNEL semantic, do nothing */
if (rd->rdma_protocol == FIO_RDMA_CHA_SEND)
rd->rdma_protocol = FIO_RDMA_CHA_RECV;
}
return 0;
}
static int cq_event_handler(struct thread_data *td, enum ibv_wc_opcode opcode)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_wc wc;
struct rdma_io_u_data *r_io_u_d;
int ret;
int compevnum = 0;
int i;
while ((ret = ibv_poll_cq(rd->cq, 1, &wc)) == 1) {
ret = 0;
compevnum++;
if (wc.status) {
log_err("fio: cq completion status %d(%s)\n",
wc.status, ibv_wc_status_str(wc.status));
return -1;
}
switch (wc.opcode) {
case IBV_WC_RECV:
if (rd->is_client == 1)
client_recv(td, &wc);
else
server_recv(td, &wc);
if (wc.wr_id == FIO_RDMA_MAX_IO_DEPTH)
break;
for (i = 0; i < rd->io_u_flight_nr; i++) {
r_io_u_d = rd->io_us_flight[i]->engine_data;
if (wc.wr_id == r_io_u_d->rq_wr.wr_id) {
rd->io_us_flight[i]->resid =
rd->io_us_flight[i]->buflen
- wc.byte_len;
rd->io_us_flight[i]->error = 0;
rd->io_us_completed[rd->
io_u_completed_nr]
= rd->io_us_flight[i];
rd->io_u_completed_nr++;
break;
}
}
if (i == rd->io_u_flight_nr)
log_err("fio: recv wr %" PRId64 " not found\n",
wc.wr_id);
else {
/* put the last one into middle of the list */
rd->io_us_flight[i] =
rd->io_us_flight[rd->io_u_flight_nr - 1];
rd->io_u_flight_nr--;
}
break;
case IBV_WC_SEND:
case IBV_WC_RDMA_WRITE:
case IBV_WC_RDMA_READ:
if (wc.wr_id == FIO_RDMA_MAX_IO_DEPTH)
break;
for (i = 0; i < rd->io_u_flight_nr; i++) {
r_io_u_d = rd->io_us_flight[i]->engine_data;
if (wc.wr_id == r_io_u_d->sq_wr.wr_id) {
rd->io_us_completed[rd->
io_u_completed_nr]
= rd->io_us_flight[i];
rd->io_u_completed_nr++;
break;
}
}
if (i == rd->io_u_flight_nr)
log_err("fio: send wr %" PRId64 " not found\n",
wc.wr_id);
else {
/* put the last one into middle of the list */
rd->io_us_flight[i] =
rd->io_us_flight[rd->io_u_flight_nr - 1];
rd->io_u_flight_nr--;
}
break;
default:
log_info("fio: unknown completion event %d\n",
wc.opcode);
return -1;
}
rd->cq_event_num++;
}
if (ret) {
log_err("fio: poll error %d\n", ret);
return 1;
}
return compevnum;
}
/*
* Return -1 for error and 'nr events' for a positive number
* of events
*/
static int rdma_poll_wait(struct thread_data *td, enum ibv_wc_opcode opcode)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_cq *ev_cq;
void *ev_ctx;
int ret;
if (rd->cq_event_num > 0) { /* previous left */
rd->cq_event_num--;
return 0;
}
again:
if (ibv_get_cq_event(rd->channel, &ev_cq, &ev_ctx) != 0) {
log_err("fio: Failed to get cq event!\n");
return -1;
}
if (ev_cq != rd->cq) {
log_err("fio: Unknown CQ!\n");
return -1;
}
if (ibv_req_notify_cq(rd->cq, 0) != 0) {
log_err("fio: Failed to set notify!\n");
return -1;
}
ret = cq_event_handler(td, opcode);
if (ret < 1)
goto again;
ibv_ack_cq_events(rd->cq, ret);
rd->cq_event_num--;
return ret;
}
static int fio_rdmaio_setup_qp(struct thread_data *td)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_qp_init_attr init_attr;
int qp_depth = td->o.iodepth * 2; /* 2 times of io depth */
if (rd->is_client == 0)
rd->pd = ibv_alloc_pd(rd->child_cm_id->verbs);
else
rd->pd = ibv_alloc_pd(rd->cm_id->verbs);
if (rd->pd == NULL) {
log_err("fio: ibv_alloc_pd fail\n");
return 1;
}
if (rd->is_client == 0)
rd->channel = ibv_create_comp_channel(rd->child_cm_id->verbs);
else
rd->channel = ibv_create_comp_channel(rd->cm_id->verbs);
if (rd->channel == NULL) {
log_err("fio: ibv_create_comp_channel fail\n");
goto err1;
}
if (qp_depth < 16)
qp_depth = 16;
if (rd->is_client == 0)
rd->cq = ibv_create_cq(rd->child_cm_id->verbs,
qp_depth, rd, rd->channel, 0);
else
rd->cq = ibv_create_cq(rd->cm_id->verbs,
qp_depth, rd, rd->channel, 0);
if (rd->cq == NULL) {
log_err("fio: ibv_create_cq failed\n");
goto err2;
}
if (ibv_req_notify_cq(rd->cq, 0) != 0) {
log_err("fio: ibv_create_cq failed\n");
goto err3;
}
/* create queue pair */
memset(&init_attr, 0, sizeof(init_attr));
init_attr.cap.max_send_wr = qp_depth;
init_attr.cap.max_recv_wr = qp_depth;
init_attr.cap.max_recv_sge = 1;
init_attr.cap.max_send_sge = 1;
init_attr.qp_type = IBV_QPT_RC;
init_attr.send_cq = rd->cq;
init_attr.recv_cq = rd->cq;
if (rd->is_client == 0) {
if (rdma_create_qp(rd->child_cm_id, rd->pd, &init_attr) != 0) {
log_err("fio: rdma_create_qp failed\n");
goto err3;
}
rd->qp = rd->child_cm_id->qp;
} else {
if (rdma_create_qp(rd->cm_id, rd->pd, &init_attr) != 0) {
log_err("fio: rdma_create_qp failed\n");
goto err3;
}
rd->qp = rd->cm_id->qp;
}
return 0;
err3:
ibv_destroy_cq(rd->cq);
err2:
ibv_destroy_comp_channel(rd->channel);
err1:
ibv_dealloc_pd(rd->pd);
return 1;
}
static int fio_rdmaio_setup_control_msg_buffers(struct thread_data *td)
{
struct rdmaio_data *rd = td->io_ops->data;
rd->recv_mr = ibv_reg_mr(rd->pd, &rd->recv_buf, sizeof(rd->recv_buf),
IBV_ACCESS_LOCAL_WRITE);
if (rd->recv_mr == NULL) {
log_err("fio: recv_buf reg_mr failed\n");
return 1;
}
rd->send_mr = ibv_reg_mr(rd->pd, &rd->send_buf, sizeof(rd->send_buf),
0);
if (rd->send_mr == NULL) {
log_err("fio: send_buf reg_mr failed\n");
ibv_dereg_mr(rd->recv_mr);
return 1;
}
/* setup work request */
/* recv wq */
rd->recv_sgl.addr = (uint64_t) (unsigned long)&rd->recv_buf;
rd->recv_sgl.length = sizeof(rd->recv_buf);
rd->recv_sgl.lkey = rd->recv_mr->lkey;
rd->rq_wr.sg_list = &rd->recv_sgl;
rd->rq_wr.num_sge = 1;
rd->rq_wr.wr_id = FIO_RDMA_MAX_IO_DEPTH;
/* send wq */
rd->send_sgl.addr = (uint64_t) (unsigned long)&rd->send_buf;
rd->send_sgl.length = sizeof(rd->send_buf);
rd->send_sgl.lkey = rd->send_mr->lkey;
rd->sq_wr.opcode = IBV_WR_SEND;
rd->sq_wr.send_flags = IBV_SEND_SIGNALED;
rd->sq_wr.sg_list = &rd->send_sgl;
rd->sq_wr.num_sge = 1;
rd->sq_wr.wr_id = FIO_RDMA_MAX_IO_DEPTH;
return 0;
}
static int get_next_channel_event(struct thread_data *td,
struct rdma_event_channel *channel,
enum rdma_cm_event_type wait_event)
{
struct rdmaio_data *rd = td->io_ops->data;
struct rdma_cm_event *event;
int ret;
ret = rdma_get_cm_event(channel, &event);
if (ret) {
log_err("fio: rdma_get_cm_event: %d\n", ret);
return 1;
}
if (event->event != wait_event) {
log_err("fio: event is %s instead of %s\n",
rdma_event_str(event->event),
rdma_event_str(wait_event));
return 1;
}
switch (event->event) {
case RDMA_CM_EVENT_CONNECT_REQUEST:
rd->child_cm_id = event->id;
break;
default:
break;
}
rdma_ack_cm_event(event);
return 0;
}
static int fio_rdmaio_prep(struct thread_data *td, struct io_u *io_u)
{
struct rdmaio_data *rd = td->io_ops->data;
struct rdma_io_u_data *r_io_u_d;
r_io_u_d = io_u->engine_data;
switch (rd->rdma_protocol) {
case FIO_RDMA_MEM_WRITE:
case FIO_RDMA_MEM_READ:
r_io_u_d->rdma_sgl.addr = (uint64_t) (unsigned long)io_u->buf;
r_io_u_d->rdma_sgl.lkey = io_u->mr->lkey;
r_io_u_d->sq_wr.wr_id = r_io_u_d->wr_id;
r_io_u_d->sq_wr.send_flags = IBV_SEND_SIGNALED;
r_io_u_d->sq_wr.sg_list = &r_io_u_d->rdma_sgl;
r_io_u_d->sq_wr.num_sge = 1;
break;
case FIO_RDMA_CHA_SEND:
r_io_u_d->rdma_sgl.addr = (uint64_t) (unsigned long)io_u->buf;
r_io_u_d->rdma_sgl.lkey = io_u->mr->lkey;
r_io_u_d->rdma_sgl.length = io_u->buflen;
r_io_u_d->sq_wr.wr_id = r_io_u_d->wr_id;
r_io_u_d->sq_wr.opcode = IBV_WR_SEND;
r_io_u_d->sq_wr.send_flags = IBV_SEND_SIGNALED;
r_io_u_d->sq_wr.sg_list = &r_io_u_d->rdma_sgl;
r_io_u_d->sq_wr.num_sge = 1;
break;
case FIO_RDMA_CHA_RECV:
r_io_u_d->rdma_sgl.addr = (uint64_t) (unsigned long)io_u->buf;
r_io_u_d->rdma_sgl.lkey = io_u->mr->lkey;
r_io_u_d->rdma_sgl.length = io_u->buflen;
r_io_u_d->rq_wr.wr_id = r_io_u_d->wr_id;
r_io_u_d->rq_wr.sg_list = &r_io_u_d->rdma_sgl;
r_io_u_d->rq_wr.num_sge = 1;
break;
default:
log_err("fio: unknown rdma protocol - %d\n", rd->rdma_protocol);
break;
}
return 0;
}
static struct io_u *fio_rdmaio_event(struct thread_data *td, int event)
{
struct rdmaio_data *rd = td->io_ops->data;
struct io_u *io_u;
int i;
io_u = rd->io_us_completed[0];
for (i = 0; i < rd->io_u_completed_nr - 1; i++)
rd->io_us_completed[i] = rd->io_us_completed[i + 1];
rd->io_u_completed_nr--;
dprint_io_u(io_u, "fio_rdmaio_event");
return io_u;
}
static int fio_rdmaio_getevents(struct thread_data *td, unsigned int min,
unsigned int max, struct timespec *t)
{
struct rdmaio_data *rd = td->io_ops->data;
enum ibv_wc_opcode comp_opcode;
comp_opcode = IBV_WC_RDMA_WRITE;
struct ibv_cq *ev_cq;
void *ev_ctx;
int ret, r = 0;
switch (rd->rdma_protocol) {
case FIO_RDMA_MEM_WRITE:
comp_opcode = IBV_WC_RDMA_WRITE;
break;
case FIO_RDMA_MEM_READ:
comp_opcode = IBV_WC_RDMA_READ;
break;
case FIO_RDMA_CHA_SEND:
comp_opcode = IBV_WC_SEND;
break;
case FIO_RDMA_CHA_RECV:
comp_opcode = IBV_WC_RECV;
break;
default:
log_err("fio: unknown rdma protocol - %d\n", rd->rdma_protocol);
break;
}
if (rd->cq_event_num > 0) { /* previous left */
rd->cq_event_num--;
return 0;
}
again:
if (ibv_get_cq_event(rd->channel, &ev_cq, &ev_ctx) != 0) {
log_err("fio: Failed to get cq event!\n");
return -1;
}
if (ev_cq != rd->cq) {
log_err("fio: Unknown CQ!\n");
return -1;
}
if (ibv_req_notify_cq(rd->cq, 0) != 0) {
log_err("fio: Failed to set notify!\n");
return -1;
}
ret = cq_event_handler(td, comp_opcode);
if (ret < 1)
goto again;
ibv_ack_cq_events(rd->cq, ret);
r += ret;
if (r < min)
goto again;
rd->cq_event_num -= r;
return r;
}
static int fio_rdmaio_send(struct thread_data *td, struct io_u **io_us,
unsigned int nr)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_send_wr *bad_wr;
#if 0
enum ibv_wc_opcode comp_opcode;
comp_opcode = IBV_WC_RDMA_WRITE;
#endif
int i;
long index;
struct rdma_io_u_data *r_io_u_d;
r_io_u_d = NULL;
for (i = 0; i < nr; i++) {
/* RDMA_WRITE or RDMA_READ */
switch (rd->rdma_protocol) {
case FIO_RDMA_MEM_WRITE:
/* compose work request */
r_io_u_d = io_us[i]->engine_data;
index = __rand(&rd->rand_state) % rd->rmt_nr;
r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_WRITE;
r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
r_io_u_d->sq_wr.wr.rdma.remote_addr = \
rd->rmt_us[index].buf;
r_io_u_d->sq_wr.sg_list->length = io_us[i]->buflen;
break;
case FIO_RDMA_MEM_READ:
/* compose work request */
r_io_u_d = io_us[i]->engine_data;
index = __rand(&rd->rand_state) % rd->rmt_nr;
r_io_u_d->sq_wr.opcode = IBV_WR_RDMA_READ;
r_io_u_d->sq_wr.wr.rdma.rkey = rd->rmt_us[index].rkey;
r_io_u_d->sq_wr.wr.rdma.remote_addr = \
rd->rmt_us[index].buf;
r_io_u_d->sq_wr.sg_list->length = io_us[i]->buflen;
break;
case FIO_RDMA_CHA_SEND:
r_io_u_d = io_us[i]->engine_data;
r_io_u_d->sq_wr.opcode = IBV_WR_SEND;
r_io_u_d->sq_wr.send_flags = IBV_SEND_SIGNALED;
break;
default:
log_err("fio: unknown rdma protocol - %d\n",
rd->rdma_protocol);
break;
}
if (ibv_post_send(rd->qp, &r_io_u_d->sq_wr, &bad_wr) != 0) {
log_err("fio: ibv_post_send fail\n");
return -1;
}
dprint_io_u(io_us[i], "fio_rdmaio_send");
}
/* wait for completion
rdma_poll_wait(td, comp_opcode); */
return i;
}
static int fio_rdmaio_recv(struct thread_data *td, struct io_u **io_us,
unsigned int nr)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_recv_wr *bad_wr;
struct rdma_io_u_data *r_io_u_d;
int i;
i = 0;
if (rd->rdma_protocol == FIO_RDMA_CHA_RECV) {
/* post io_u into recv queue */
for (i = 0; i < nr; i++) {
r_io_u_d = io_us[i]->engine_data;
if (ibv_post_recv(rd->qp, &r_io_u_d->rq_wr, &bad_wr) !=
0) {
log_err("fio: ibv_post_recv fail\n");
return 1;
}
}
} else if ((rd->rdma_protocol == FIO_RDMA_MEM_READ)
|| (rd->rdma_protocol == FIO_RDMA_MEM_WRITE)) {
/* re-post the rq_wr */
if (ibv_post_recv(rd->qp, &rd->rq_wr, &bad_wr) != 0) {
log_err("fio: ibv_post_recv fail\n");
return 1;
}
rdma_poll_wait(td, IBV_WC_RECV);
dprint(FD_IO, "fio: recv FINISH message\n");
td->done = 1;
return 0;
}
return i;
}
static int fio_rdmaio_queue(struct thread_data *td, struct io_u *io_u)
{
struct rdmaio_data *rd = td->io_ops->data;
fio_ro_check(td, io_u);
if (rd->io_u_queued_nr == (int)td->o.iodepth)
return FIO_Q_BUSY;
rd->io_us_queued[rd->io_u_queued_nr] = io_u;
rd->io_u_queued_nr++;
dprint_io_u(io_u, "fio_rdmaio_queue");
return FIO_Q_QUEUED;
}
static void fio_rdmaio_queued(struct thread_data *td, struct io_u **io_us,
unsigned int nr)
{
struct rdmaio_data *rd = td->io_ops->data;
struct timeval now;
unsigned int i;
if (!fio_fill_issue_time(td))
return;
fio_gettime(&now, NULL);
for (i = 0; i < nr; i++) {
struct io_u *io_u = io_us[i];
/* queued -> flight */
rd->io_us_flight[rd->io_u_flight_nr] = io_u;
rd->io_u_flight_nr++;
memcpy(&io_u->issue_time, &now, sizeof(now));
io_u_queued(td, io_u);
}
}
static int fio_rdmaio_commit(struct thread_data *td)
{
struct rdmaio_data *rd = td->io_ops->data;
struct io_u **io_us;
int ret;
if (!rd->io_us_queued)
return 0;
io_us = rd->io_us_queued;
do {
/* RDMA_WRITE or RDMA_READ */
if (rd->is_client)
ret = fio_rdmaio_send(td, io_us, rd->io_u_queued_nr);
else if (!rd->is_client)
ret = fio_rdmaio_recv(td, io_us, rd->io_u_queued_nr);
else
ret = 0; /* must be a SYNC */
if (ret > 0) {
fio_rdmaio_queued(td, io_us, ret);
io_u_mark_submit(td, ret);
rd->io_u_queued_nr -= ret;
io_us += ret;
ret = 0;
} else
break;
} while (rd->io_u_queued_nr);
return ret;
}
static int fio_rdmaio_connect(struct thread_data *td, struct fio_file *f)
{
struct rdmaio_data *rd = td->io_ops->data;
struct rdma_conn_param conn_param;
struct ibv_send_wr *bad_wr;
memset(&conn_param, 0, sizeof(conn_param));
conn_param.responder_resources = 1;
conn_param.initiator_depth = 1;
conn_param.retry_count = 10;
if (rdma_connect(rd->cm_id, &conn_param) != 0) {
log_err("fio: rdma_connect fail\n");
return 1;
}
if (get_next_channel_event
(td, rd->cm_channel, RDMA_CM_EVENT_ESTABLISHED) != 0) {
log_err("fio: wait for RDMA_CM_EVENT_ESTABLISHED\n");
return 1;
}
/* send task request */
rd->send_buf.mode = htonl(rd->rdma_protocol);
rd->send_buf.nr = htonl(td->o.iodepth);
if (ibv_post_send(rd->qp, &rd->sq_wr, &bad_wr) != 0) {
log_err("fio: ibv_post_send fail");
return 1;
}
rdma_poll_wait(td, IBV_WC_SEND);
/* wait for remote MR info from server side */
rdma_poll_wait(td, IBV_WC_RECV);
/* In SEND/RECV test, it's a good practice to setup the iodepth of
* of the RECV side deeper than that of the SEND side to
* avoid RNR (receiver not ready) error. The
* SEND side may send so many unsolicited message before
* RECV side commits sufficient recv buffers into recv queue.
* This may lead to RNR error. Here, SEND side pauses for a while
* during which RECV side commits sufficient recv buffers.
*/
usleep(500000);
return 0;
}
static int fio_rdmaio_accept(struct thread_data *td, struct fio_file *f)
{
struct rdmaio_data *rd = td->io_ops->data;
struct rdma_conn_param conn_param;
struct ibv_send_wr *bad_wr;
/* rdma_accept() - then wait for accept success */
memset(&conn_param, 0, sizeof(conn_param));
conn_param.responder_resources = 1;
conn_param.initiator_depth = 1;
if (rdma_accept(rd->child_cm_id, &conn_param) != 0) {
log_err("fio: rdma_accept\n");
return 1;
}
if (get_next_channel_event
(td, rd->cm_channel, RDMA_CM_EVENT_ESTABLISHED) != 0) {
log_err("fio: wait for RDMA_CM_EVENT_ESTABLISHED\n");
return 1;
}
/* wait for request */
rdma_poll_wait(td, IBV_WC_RECV);
if (ibv_post_send(rd->qp, &rd->sq_wr, &bad_wr) != 0) {
log_err("fio: ibv_post_send fail");
return 1;
}
rdma_poll_wait(td, IBV_WC_SEND);
return 0;
}
static int fio_rdmaio_open_file(struct thread_data *td, struct fio_file *f)
{
if (td_read(td))
return fio_rdmaio_accept(td, f);
else
return fio_rdmaio_connect(td, f);
}
static int fio_rdmaio_close_file(struct thread_data *td, struct fio_file *f)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_send_wr *bad_wr;
/* unregister rdma buffer */
/*
* Client sends notification to the server side
*/
/* refer to: http://linux.die.net/man/7/rdma_cm */
if ((rd->is_client == 1) && ((rd->rdma_protocol == FIO_RDMA_MEM_WRITE)
|| (rd->rdma_protocol ==
FIO_RDMA_MEM_READ))) {
if (ibv_post_send(rd->qp, &rd->sq_wr, &bad_wr) != 0) {
log_err("fio: ibv_post_send fail");
return 1;
}
dprint(FD_IO, "fio: close infomation sent success\n");
rdma_poll_wait(td, IBV_WC_SEND);
}
if (rd->is_client == 1)
rdma_disconnect(rd->cm_id);
else {
rdma_disconnect(rd->child_cm_id);
#if 0
rdma_disconnect(rd->cm_id);
#endif
}
#if 0
if (get_next_channel_event(td, rd->cm_channel, RDMA_CM_EVENT_DISCONNECTED) != 0) {
log_err("fio: wait for RDMA_CM_EVENT_DISCONNECTED\n");
return 1;
}
#endif
ibv_destroy_cq(rd->cq);
ibv_destroy_qp(rd->qp);
if (rd->is_client == 1)
rdma_destroy_id(rd->cm_id);
else {
rdma_destroy_id(rd->child_cm_id);
rdma_destroy_id(rd->cm_id);
}
ibv_destroy_comp_channel(rd->channel);
ibv_dealloc_pd(rd->pd);
return 0;
}
static int fio_rdmaio_setup_connect(struct thread_data *td, const char *host,
unsigned short port)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_recv_wr *bad_wr;
int err;
rd->addr.sin_family = AF_INET;
rd->addr.sin_port = htons(port);
if (inet_aton(host, &rd->addr.sin_addr) != 1) {
struct hostent *hent;
hent = gethostbyname(host);
if (!hent) {
td_verror(td, errno, "gethostbyname");
return 1;
}
memcpy(&rd->addr.sin_addr, hent->h_addr, 4);
}
/* resolve route */
err = rdma_resolve_addr(rd->cm_id, NULL, (struct sockaddr *)&rd->addr, 2000);
if (err != 0) {
log_err("fio: rdma_resolve_addr: %d\n", err);
return 1;
}
err = get_next_channel_event(td, rd->cm_channel, RDMA_CM_EVENT_ADDR_RESOLVED);
if (err != 0) {
log_err("fio: get_next_channel_event: %d\n", err);
return 1;
}
/* resolve route */
err = rdma_resolve_route(rd->cm_id, 2000);
if (err != 0) {
log_err("fio: rdma_resolve_route: %d\n", err);
return 1;
}
err = get_next_channel_event(td, rd->cm_channel, RDMA_CM_EVENT_ROUTE_RESOLVED);
if (err != 0) {
log_err("fio: get_next_channel_event: %d\n", err);
return 1;
}
/* create qp and buffer */
if (fio_rdmaio_setup_qp(td) != 0)
return 1;
if (fio_rdmaio_setup_control_msg_buffers(td) != 0)
return 1;
/* post recv buf */
err = ibv_post_recv(rd->qp, &rd->rq_wr, &bad_wr);
if (err != 0) {
log_err("fio: ibv_post_recv fail: %d\n", err);
return 1;
}
return 0;
}
static int fio_rdmaio_setup_listen(struct thread_data *td, short port)
{
struct rdmaio_data *rd = td->io_ops->data;
struct ibv_recv_wr *bad_wr;
rd->addr.sin_family = AF_INET;
rd->addr.sin_addr.s_addr = htonl(INADDR_ANY);
rd->addr.sin_port = htons(port);
/* rdma_listen */
if (rdma_bind_addr(rd->cm_id, (struct sockaddr *)&rd->addr) != 0) {
log_err("fio: rdma_bind_addr fail\n");
return 1;
}
if (rdma_listen(rd->cm_id, 3) != 0) {
log_err("fio: rdma_listen fail\n");
return 1;
}
/* wait for CONNECT_REQUEST */
if (get_next_channel_event
(td, rd->cm_channel, RDMA_CM_EVENT_CONNECT_REQUEST) != 0) {
log_err("fio: wait for RDMA_CM_EVENT_CONNECT_REQUEST\n");
return 1;
}
if (fio_rdmaio_setup_qp(td) != 0)
return 1;
if (fio_rdmaio_setup_control_msg_buffers(td) != 0)
return 1;
/* post recv buf */
if (ibv_post_recv(rd->qp, &rd->rq_wr, &bad_wr) != 0) {
log_err("fio: ibv_post_recv fail\n");
return 1;
}
return 0;
}
static int fio_rdmaio_init(struct thread_data *td)
{
struct rdmaio_data *rd = td->io_ops->data;
struct flist_head *entry;
unsigned int max_bs;
unsigned int port;
char host[64], buf[128];
char *sep, *portp, *modep;
int ret, i = 0;
struct rlimit rl;
if (td_rw(td)) {
log_err("fio: rdma connections must be read OR write\n");
return 1;
}
if (td_random(td)) {
log_err("fio: RDMA network IO can't be random\n");
return 1;
}
/* check RLIMIT_MEMLOCK */
if (getrlimit(RLIMIT_MEMLOCK, &rl) != 0) {
log_err("fio: getrlimit fail: %d(%s)\n",
errno, strerror(errno));
return 1;
}
/* soft limit */
if ((rl.rlim_cur != RLIM_INFINITY)
&& (rl.rlim_cur < td->orig_buffer_size)) {
log_err("fio: soft RLIMIT_MEMLOCK is: %" PRId64 "\n",
rl.rlim_cur);
log_err("fio: total block size is: %zd\n",
td->orig_buffer_size);
/* try to set larger RLIMIT_MEMLOCK */
rl.rlim_cur = rl.rlim_max;
if (setrlimit(RLIMIT_MEMLOCK, &rl) != 0) {
log_err("fio: setrlimit fail: %d(%s)\n",
errno, strerror(errno));
log_err("fio: you may try enlarge MEMLOCK by root\n");
log_err("# ulimit -l unlimited\n");
return 1;
}
}
strcpy(buf, td->o.filename);
sep = strchr(buf, '/');
if (!sep)
goto bad_host;
*sep = '\0';
sep++;
strcpy(host, buf);
if (!strlen(host))
goto bad_host;
modep = NULL;
portp = sep;
sep = strchr(portp, '/');
if (sep) {
*sep = '\0';
modep = sep + 1;
}
port = strtol(portp, NULL, 10);
if (!port || port > 65535)
goto bad_host;
if (modep) {
if (!strncmp("rdma_write", modep, strlen(modep)) ||
!strncmp("RDMA_WRITE", modep, strlen(modep)))
rd->rdma_protocol = FIO_RDMA_MEM_WRITE;
else if (!strncmp("rdma_read", modep, strlen(modep)) ||
!strncmp("RDMA_READ", modep, strlen(modep)))
rd->rdma_protocol = FIO_RDMA_MEM_READ;
else if (!strncmp("send", modep, strlen(modep)) ||
!strncmp("SEND", modep, strlen(modep)))
rd->rdma_protocol = FIO_RDMA_CHA_SEND;
else
goto bad_host;
} else
rd->rdma_protocol = FIO_RDMA_MEM_WRITE;
rd->cq_event_num = 0;
rd->cm_channel = rdma_create_event_channel();
if (!rd->cm_channel) {
log_err("fio: rdma_create_event_channel fail\n");
return 1;
}
ret = rdma_create_id(rd->cm_channel, &rd->cm_id, rd, RDMA_PS_TCP);
if (ret) {
log_err("fio: rdma_create_id fail\n");
return 1;
}
if ((rd->rdma_protocol == FIO_RDMA_MEM_WRITE) ||
(rd->rdma_protocol == FIO_RDMA_MEM_READ)) {
rd->rmt_us =
malloc(FIO_RDMA_MAX_IO_DEPTH * sizeof(struct remote_u));
memset(rd->rmt_us, 0,
FIO_RDMA_MAX_IO_DEPTH * sizeof(struct remote_u));
rd->rmt_nr = 0;
}
rd->io_us_queued = malloc(td->o.iodepth * sizeof(struct io_u *));
memset(rd->io_us_queued, 0, td->o.iodepth * sizeof(struct io_u *));
rd->io_u_queued_nr = 0;
rd->io_us_flight = malloc(td->o.iodepth * sizeof(struct io_u *));
memset(rd->io_us_flight, 0, td->o.iodepth * sizeof(struct io_u *));
rd->io_u_flight_nr = 0;
rd->io_us_completed = malloc(td->o.iodepth * sizeof(struct io_u *));
memset(rd->io_us_completed, 0, td->o.iodepth * sizeof(struct io_u *));
rd->io_u_completed_nr = 0;
if (td_read(td)) { /* READ as the server */
rd->is_client = 0;
/* server rd->rdma_buf_len will be setup after got request */
ret = fio_rdmaio_setup_listen(td, port);
} else { /* WRITE as the client */
rd->is_client = 1;
ret = fio_rdmaio_setup_connect(td, host, port);
}
max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
/* register each io_u in the free list */
flist_for_each(entry, &td->io_u_freelist) {
struct io_u *io_u = flist_entry(entry, struct io_u, list);
io_u->engine_data = malloc(sizeof(struct rdma_io_u_data));
memset(io_u->engine_data, 0, sizeof(struct rdma_io_u_data));
((struct rdma_io_u_data *)io_u->engine_data)->wr_id = i;
io_u->mr = ibv_reg_mr(rd->pd, io_u->buf, max_bs,
IBV_ACCESS_LOCAL_WRITE |
IBV_ACCESS_REMOTE_READ |
IBV_ACCESS_REMOTE_WRITE);
if (io_u->mr == NULL) {
log_err("fio: ibv_reg_mr io_u failed\n");
return 1;
}
rd->send_buf.rmt_us[i].buf =
htonll((uint64_t) (unsigned long)io_u->buf);
rd->send_buf.rmt_us[i].rkey = htonl(io_u->mr->rkey);
rd->send_buf.rmt_us[i].size = htonl(max_bs);
#if 0
log_info("fio: Send rkey %x addr %" PRIx64 " len %d to client\n", io_u->mr->rkey, io_u->buf, max_bs); */
#endif
i++;
}
rd->send_buf.nr = htonl(i);
return ret;
bad_host:
log_err("fio: bad rdma host/port/protocol: %s\n", td->o.filename);
return 1;
}
static void fio_rdmaio_cleanup(struct thread_data *td)
{
struct rdmaio_data *rd = td->io_ops->data;
if (rd)
free(rd);
}
static int fio_rdmaio_setup(struct thread_data *td)
{
struct rdmaio_data *rd;
if (!td->io_ops->data) {
rd = malloc(sizeof(*rd));
memset(rd, 0, sizeof(*rd));
init_rand_seed(&rd->rand_state, (unsigned int) GOLDEN_RATIO_PRIME);
td->io_ops->data = rd;
}
return 0;
}
static struct ioengine_ops ioengine_rw = {
.name = "rdma",
.version = FIO_IOOPS_VERSION,
.setup = fio_rdmaio_setup,
.init = fio_rdmaio_init,
.prep = fio_rdmaio_prep,
.queue = fio_rdmaio_queue,
.commit = fio_rdmaio_commit,
.getevents = fio_rdmaio_getevents,
.event = fio_rdmaio_event,
.cleanup = fio_rdmaio_cleanup,
.open_file = fio_rdmaio_open_file,
.close_file = fio_rdmaio_close_file,
.flags = FIO_DISKLESSIO | FIO_UNIDIR | FIO_PIPEIO,
};
static void fio_init fio_rdmaio_register(void)
{
register_ioengine(&ioengine_rw);
}
static void fio_exit fio_rdmaio_unregister(void)
{
unregister_ioengine(&ioengine_rw);
}