OVS v OVS-DPDK
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This document discusses Open vSwitch (OVS) and how using Data Plane Development Kit (DPDK) can improve its performance. It notes that with standard OVS, there are many components between a virtual machine and physical networking that cause scalability and performance issues due to context switches. OVS-DPDK addresses this by using polling, hugepages, pinned CPUs, and userspace I/O to bypass the kernel and reduce overhead. The document shows that using DPDK can increase OVS throughput by over 8x and reduce latency by 30-37% compared to standard OVS.
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OVS v OVS-DPDK
- 2. ABOUT ME Md Safiyat Reza Open-source enthusiast Delving into cloud. safiyat @reza_safiyat reza.safiyat@acm.org
- 3. What is OVS?
- 6. VM virtio driver ping 8.8.8.8 OK, wait a sec
- 7. virtio driver QEMU virtio backend VM wants to ping 8.8.8.8 OK, wait a sec
- 8. QEMU virtio backend tap device Hey there, ping 8.8.8.8 for me OK, gimme a moment
- 9. tap device Kernel Here is an ICMP packet. Do what you do best. Get back to you in a jiffy
- 11. Why OVS-DPDK?
- 12. • Lots of components between VM and physical networking infrastructure causing scalability issues and performance degradation. • Context switches
- 14. • Polling • Hugepages • Pinned CPUs • Userspace IO
- 17. • Kernel flows are basically a cache • OVS performs very well so long as the packets hit this cache • Default flow timeout is 10 seconds. • Most of the overhead here is in copying packets in the userspace and context switching.
- 18. Standard OVS OVS-DPDK Gbps 1.159 9.9 MPPS 1.72 14.85 Throughput • Xeon E5-2643@3.5 GHz • Intel 82599EB • Linux Kernel 3.17
- 19. Standard OVS OVS-DPDK Difference TCP 46 33 ~ 30% UDP 51 32 ~ 37% Latency • Xeon E5-2643@3.5 GHz • Intel 82599EB • Linux Kernel 3.17
- 20. Thank you!
Editor's Notes
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