[dpdk-dev] DPDK - VIRTIO performance problems

Ouyang, Changchun changchun.ouyang at intel.com
Mon Oct 13 05:09:57 CEST 2014


Hi ,

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Matthew Hall
> Sent: Sunday, October 12, 2014 9:18 PM
> To: Yan Freedland
> Cc: dev at dpdk.org
> Subject: Re: [dpdk-dev] DPDK - VIRTIO performance problems
> 
> On Sun, Oct 12, 2014 at 12:37:37PM +0000, Yan Freedland wrote:
> > Every ~2min traffic stopped completely and then immediately came back.
> > This happened in a periodic fashion.
> 
> To me it sounds like it could be similar to what I've seen when I ran out of
> mbuf's or ran out of RX / TX descriptor entries. It could be worth checking the
> error counters on the interfaces with DPDK and Linux OS / ethtool to see
> what might be incrementing during the failed time periods.
> 

I didn't meet this issue before,
I am not sure if the following patch will fix this issue or not. Please try it.
http://dpdk.org/dev/patchwork/patch/779/

By the way, what kind of backend did you use?
User space vhost, or other backend?

Thanks 
Changchun


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