nfs: Enable multi-core epoll support in gNFSd

Summary:
- Enables multi-core epoll support in the nfs daemon.
- Option can be turned on using:
  gluster volume set <volname> nfs.event-threads <numthreads>

Test Plan: Prove test!

Reviewers: kvigor, rwareing

Reviewed By: rwareing

Subscribers: dld, moox, dph

Differential Revision: https://phabricator.fb.com/D3117966

Change-Id: Ie8a7b1ba04b0e83f5ec7a09f9d181fe59be479ca
Signed-off-by: Jeff Darcy <jdarcy@fb.com>
Reviewed-on: https://review.gluster.org/18266
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>
Tested-by: Jeff Darcy <jeff@pl.atyp.us>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/tests/basic/nfs-multicore-epoll.t b/tests/basic/nfs-multicore-epoll.t
new file mode 100644
index 00000000000..28f341521f9
--- /dev/null
+++ b/tests/basic/nfs-multicore-epoll.t
@@ -0,0 +1,40 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+. $(dirname $0)/../nfs.rc
+
+cleanup;
+
+>/var/log/glusterfs/nfs.log;
+
+function check_event_thread_log ()
+{
+        local nlines
+
+        nlines=$(grep "$1" /var/log/glusterfs/nfs.log | grep -v G_LOG | wc -l)
+        if [ "$nlines" != "0" ]; then
+                echo "Y" 
+        else
+                echo "N"
+        fi;
+}
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 3 $H0:$B0/${V0}{0,1,2}
+TEST $CLI volume set $V0 nfs.disable off
+TEST $CLI volume start $V0
+
+EXPECT_WITHIN $NFS_EXPORT_TIMEOUT "1" is_nfs_export_available;
+
+# Make sure its not enabled without the option
+EXPECT_WITHIN 10 "N" check_event_thread_log "Started thread with index 3";
+
+# Turn it on and check that we spawned the threads
+TEST $CLI volume set $V0 nfs.disable on
+TEST $CLI volume set $V0 nfs.event-threads 4
+TEST $CLI volume set $V0 nfs.disable off
+EXPECT_WITHIN 10 "Y" check_event_thread_log "Started thread with index 4";
+
+cleanup;