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From: Yan Freedland <YanF@Radware.com>
To: "Ouyang, Changchun" <changchun.ouyang@intel.com>, Matthew Hall
 <mhall@mhcomputing.net>
Thread-Topic: [dpdk-dev] DPDK - VIRTIO performance problems
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Date: Mon, 13 Oct 2014 07:04:38 +0000
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Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] DPDK - VIRTIO performance problems
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Hi

I found that what blocked me was actually the "nf_conntrack",
So enlarging the maximum there solved the issue.

Thanks=20
Yan

-----Original Message-----
From: Ouyang, Changchun [mailto:changchun.ouyang@intel.com]=20
Sent: Monday, October 13, 2014 6:10 AM
To: Matthew Hall; Yan Freedland
Cc: dev@dpdk.org; Ouyang, Changchun
Subject: RE: [dpdk-dev] DPDK - VIRTIO performance problems

Hi ,

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Matthew Hall
> Sent: Sunday, October 12, 2014 9:18 PM
> To: Yan Freedland
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] DPDK - VIRTIO performance problems
>=20
> 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.
>=20
> To me it sounds like it could be similar to what I've seen when I ran=20
> out of mbuf's or ran out of RX / TX descriptor entries. It could be=20
> worth checking the error counters on the interfaces with DPDK and=20
> Linux OS / ethtool to see what might be incrementing during the failed ti=
me periods.
>=20

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