On Sun, Jun 1, 2014 at 12:59 AM, Jason Thorpe <[email protected]> wrote:
> Thanks Ben. while I don't need it yet but would be good to know - is there > a way to profile flows in OVS (other than the obvious way of just running > and testing)? It depends on what you're interested in. You can of course profile the OVS kernel module the same way you'd profile any kernel code, but that's probably only going to offer you micro-optimization opportunities (and make you sad about the pervasive kernel changes that would be required to do anything significant). If, however, you're interested in actual forwarding performance with varying flows, then running well-designed tests is going to give you far more useful data for practical deployment purposes. (And there are a lot of host configuration tweaks unrelated to OVS - like IRQ affinity - and host hardware properties - like memory bandwidth - that have considerable impact on performance). -- Nick
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