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From: Clearasu <clearasu@gmail.com>
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To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [dpdk-virtio] Performance tuning for dpdk with
	virtio?
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Forgot to mention, I am running dpdk within the VM and used virtio-net-pmd.



> On Jul 17, 2015, at 2:20 PM, Stephen Hemminger <stephen@networkplumber.org=
> wrote:
>=20
> On Fri, 17 Jul 2015 11:03:15 -0700
> Clarylin L <clearasu@gmail.com> wrote:
>=20
>> I am running dpdk with a virtual guest as a L2 forwarder.
>>=20
>> If the virtual guest is on passthrough, dpdk can achieve around 10G
>> throughput. However if the virtual guest is on virtio, dpdk achieves just=

>> 150M throughput, which is a huge degrade. Any idea what could be the caus=
e
>> of such poor performance on virtio? and any performance tuning techniques=
 I
>> could try? Thanks a lot!
>=20
> The default Linux bridge (and OVS) switch are your bottleneck.
> It is not DPDK virtio issue in general. There are some small performance
> gains still possible with virtio enhancements (like offloading).
>=20
> Did you try running OVS-DPDK on the host?