Hi all, I have encountered an issue about the SR-IOV. The guest OS is win2008 & win2012 in which by using the performance monitor, we saw the pps & bps are zero. Then we upgrade the driver of NIC: https://downloadcenter.intel.com/download/21694, with witch the result showed better. But it's not perfect, because the bps is also 0, but the pps works normally. Is there any else methods to get the bps normally or other drivers to fix it? Thank you for answering! p.s. The following shows the info of the host [root at localhost ~]# lspci|grep I350 04:00.0 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) 04:00.1 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) 04:10.0 Ethernet controller: Intel Corporation I350 Ethernet Controller Virtual Function (rev 01) 04:10.1 Ethernet controller: Intel Corporation I350 Ethernet Controller Virtual Function (rev 01) [root at localhost ~]# cat /etc/redhat-release CentOS release 6.7 (Final) [root at localhost ~]# ethtool -i eth4 driver: igb version: 5.2.15-k firmware-version: 1.63, 0x80000a60, 1.307.0 bus-info: 0000:04:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no [root at localhost ~]# qemu-img --version|head -n 1 qemu-img version 0.12.1, Copyright (c) 2004-2008 Fabrice Bellard [root at localhost ~]# libvirtd --version libvirtd (libvirt) 0.10.2 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20160422/ee41a875/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: 3206F900 at D8057921.3A801957 Type: application/octet-stream Size: 139654 bytes Desc: not available URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20160422/ee41a875/attachment.obj>