Using SR-IOV offloads with Open-vSwitch and …

Using SR-IOV offloads with Open-vSwitch and similar applicationsRony Efraim, Or Gerlitz Mellanox Ra anana, use cases such as NFV pose high performance re-quirements (both in terms of bandwidth and real-time-ness)on hypervisors. When all VM traffic is handled by a hostswitching entity (such as when emulated or Para-Virtualguest network interfaces are used), a very high load on thelocal host CPU is implied. Thus, the traditional way of pro-viding network access to VMs doesn t meet the perfor-mance requirements. SR-IOV devices present opportunityto improve network performance. Up until recent versionsof the Linux kernel, SRIOV environment posed deep limi-tations on the ability of the hypervisor to manage the net-work when flow based approaches like open vswitch andTC or IP based tunnels were used. Recently, an approachthat facilitates SR-IOV performance while maintainingflow-based management Using the TC subsystem frame-work to program the SR-IOV e-switch was introduced inthe Linux kernel.

Using SR-IOV offloads with Open-vSwitch and similar applications Rony Efraim, Or Gerlitz Mellanox Ra’anana, Israel ronye@mellanox.com ogerlitz@mellanox.com

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