[ovs-discuss] Hashing to megaflow entry

Sara Gittlin sara.gittlin at gmail.com
Mon Aug 21 11:21:35 UTC 2017


Thank you Justin,
Indeed this article is very helpful.
i understand from the article, that generating megaflows and
installing in the kernel cache is already implemented in userspace -
ovs.
Before reading this article, i thought that megaflows were implemented
only for L2 normal mode.
Sara



On Thu, Aug 17, 2017 at 9:59 AM, Justin Pettit <jpettit at ovn.org> wrote:
>
>> On Aug 16, 2017, at 11:56 PM, Sara Gittlin <sara.gittlin at gmail.com> wrote:
>>
>> Hi,
>> Suppose we support megaflows, How the hashing is performed in the
>> kernel module ?
>> when packet arrives how do we know 'beforehand' to mask key fields in
>> order to hit the megaflow entry ?
>
> If you haven't done so already, I'd highly recommend looking at our NSDI paper that answers many of your questions:
>
>         https://www.usenix.org/system/files/conference/nsdi15/nsdi15-paper-pfaff.pdf
>
> I hope you find it helpful.
>
> --Justin
>
>


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