On Mon, Nov 27, 2017 at 9:25 PM, FERNANDO FREDIANI <fernando.frediani@upx.com> wrote:
Hello
As some may have seen recently OVS DPDK has been introduced to oVirt (https://ovirt.org/blog/2017/09/ovs-dpdk/ ). This is very interesting feature which can make a huge performance difference in terms of network performance.
Just wanted to ask if anyone has tested it in any environment and made any comparison, specially for packet forward (e.g: running Virtual Routers or Virtual Firewalls with virtio) or packet dropping as well.
You can see Intel OVS DPDK performance results compared to OVS native in https://download.01.org/packet-processing/ONPS2.1/Intel_ONP_Release_2.1_Performance_Test_Report_Rev1.0.pdf
Performance results of OVS DPDK in oVirt setup will be published soon.
One doubt I have and if someone could clarify is: Should I enable DPDK in the Host any traffic forwarded to any VMs will automatically benefit from this performance gain of DPDK or there additional steps that need to be put in place inside the VM when sharing a physical Network Interface ?
Enabling DPDK is not enough. Since it's tightly coupled to system hardware a few steps are needed in order to achieve good performance results. For example: disabling interrupts, enabling hugepages, isolating CPU cores, allocating them to PMD threads and pinning vcpus.
More information can be found here:
Thanks
Fernando
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