[ovs-discuss] Multi core on OVS

Gurucharan Shetty shettyg at nicira.com
Mon Mar 17 16:08:29 UTC 2014

On Sun, Mar 16, 2014 at 10:21 PM, Sujayyendhiren RAMARAO
SRINIVASAMURTHI <sxr1043 at rit.edu> wrote:
> Basic introduction
> (i) I work with OVS-1.9.0.
> (ii) I have added a function call in OVS dataplane processing which
> additionally takes 16microseconds to 50 microseconds.
> Issue
>  - I am trying to distribute the load (software interrupt processing) across
> both the cores. Steps I follow are :
> (i) Obtain interrupt number for the ethernet device.
> (ii) Make the smp_affinity parameter of ethernet device to 0x03 i.e.
> to use both the cores, so that at high data rates both the cores are
> utilized but i still see only one core reaching 100%.
OVS 1.9 is single threaded. So the userspace code will only run on one CPU.

> Can someone hint at how i should go further.
> Sujayyendhiren
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