From a325eb33fbe408243209b19f2d9cc288b2e57548 Mon Sep 17 00:00:00 2001 From: Christian Trautman Date: Mon, 5 Sep 2016 02:42:19 -0400 Subject: merge_buffers: Add option to disable merge buffer on qemu startup In cases with VHost user and non-jumbo frame scenarios we can disable merge buffers on the guest NICS to improve performance. This patch adds this option to the 04_vnf conf file. JIRA: VSPERF-388 Change-Id: Ic1f776e90fdccaa5d5a0c952c96811a8747fe936 Signed-off-by: Christian Trautman --- vnfs/qemu/qemu_dpdk_vhost_user.py | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'vnfs') diff --git a/vnfs/qemu/qemu_dpdk_vhost_user.py b/vnfs/qemu/qemu_dpdk_vhost_user.py index fc46aba1..794a4772 100644 --- a/vnfs/qemu/qemu_dpdk_vhost_user.py +++ b/vnfs/qemu/qemu_dpdk_vhost_user.py @@ -39,6 +39,12 @@ class QemuDpdkVhostUser(IVnfQemu): else: queue_str, mq_vector_str = '', '' + # Guest merge buffer setting + if S.getValue('GUEST_NIC_MERGE_BUFFERS_DISABLE')[self._number]: + merge_buff = 'mrg_rxbuf=off,' + else: + merge_buff = '' + # calculate index of first interface, i.e. check how many # interfaces has been created for previous VMs, where 1st NIC # of 1st VM has index 0 @@ -60,7 +66,8 @@ class QemuDpdkVhostUser(IVnfQemu): '-device', 'virtio-net-pci,mac=' + self._nics[nic]['mac'] + - ',netdev=' + net + ',csum=off,gso=off,' + + ',netdev=' + net + ',csum=off,' + merge_buff + + 'gso=off,' + 'guest_tso4=off,guest_tso6=off,guest_ecn=off' + mq_vector_str, ] -- cgit 1.2.3-korg