#This patch was developed both in-house and from outside. We plan to submit it

#upstream, but do not yet have a target date for doing so

#

# HG changeset patch

# Parent bed9e1f4976b9258363d26ec587075f77ac65042

22689609 qperf returns failed to receive results: timed out for ud_bw tests

diff -r bed9e1f4976b src/rdma.c

--- a/src/rdma.c Thu Feb 11 05:13:36 2016 -0800

+++ b/src/rdma.c Tue Feb 23 21:03:12 2016 -0800

@@ -987,9 +987,14 @@

{

DEVICE dev;

- rd_open(&dev, transport, 0, NCQE);

+ /*

+ * Post more receive buffers for the server, A fast client can cause receive WR

+ * exhaustion, which in turn can cause packet drop (in case of UD) or cause

+ * re-transmits (in case of RC).

+ */

+ rd_open(&dev, transport, 0, (4 * NCQE));

rd_prep(&dev, 0);

- rd_post_recv_std(&dev, NCQE);

+ rd_post_recv_std(&dev, (4 * NCQE));

sync_test();

while (!Finished) {

int i;

@@ -2574,6 +2579,14 @@

{

int n;

+ /*

+ * We will attempt to poll the CQ first.

+ * If CQ is empty we could wait for CQ notification.

+ */

+ n = ibv_poll_cq(dev->cq, nwc, wc);

+ if (n > 0)

+ return n;

+

if (!Req.poll_mode && !Finished) {

void *ectx;

struct ibv_cq *ecq;