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nvmf/rdma: Handle several ibv events in a row

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Currently rdma acceptor handles only one ibv event per poll
Taking into account the default acceptor poll rate (10ms), it can
take a long time to handle e.g. LAST_WQE_REACHED events when we
close huge amount of qpairs at the same time.
This patch allows to handle up to 32 ibv events per acceptor poll.

Change-Id: Ic2884dfc5b54c6aec0655aaa547b491a9934a386
Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/3821
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Alexey Marchuk 2020-08-17 17:39:54 +03:00 committed by Tomasz Zawadzki
parent 8e43a261ea
commit 58f43df1f5
1 changed files with 22 additions and 5 deletions
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27
lib/nvmf/rdma.c
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@ -3050,7 +3050,7 @@ nvmf_rdma_send_qpair_async_event(struct spdk_nvmf_rdma_qpair *rqpair,
return rc;
}
static void
static int
nvmf_process_ib_event(struct spdk_nvmf_rdma_device *device)
{
int rc;
@ -3060,9 +3060,8 @@ nvmf_process_ib_event(struct spdk_nvmf_rdma_device *device)
rc = ibv_get_async_event(device->context, &event);
if (rc) {
SPDK_ERRLOG("Failed to get async_event (%d): %s\n",
errno, spdk_strerror(errno));
return;
/* In non-blocking mode -1 means there are no events available */
return rc;
}
switch (event.event_type) {
@ -3125,6 +3124,24 @@ nvmf_process_ib_event(struct spdk_nvmf_rdma_device *device)
break;
}
ibv_ack_async_event(&event);
return 0;
}
static void
nvmf_process_ib_events(struct spdk_nvmf_rdma_device *device, uint32_t max_events)
{
int rc = 0;
uint32_t i = 0;
for (i = 0; i < max_events; i++) {
rc = nvmf_process_ib_event(device);
if (rc) {
break;
}
}
SPDK_DEBUGLOG(SPDK_LOG_RDMA, "Device %s: %u events processed\n", device->context->device->name, i);
}
static uint32_t
@ -3155,7 +3172,7 @@ nvmf_rdma_accept(struct spdk_nvmf_transport *transport)
/* Second and subsequent poll descriptors are IB async events */
TAILQ_FOREACH_SAFE(device, &rtransport->devices, link, tmp) {
if (rtransport->poll_fds[i++].revents & POLLIN) {
nvmf_process_ib_event(device);
nvmf_process_ib_events(device, 32);
nfds--;
}
}