Re: RFT: virtio_net: limit xmit polling

From: Roopa Prabhu <roprabhu@cisco.com>
To: Tom Lendacky <tahm@linux.vnet.ibm.com>,
	"Michael S. Tsirkin" <mst@redhat.com>
Cc: Krishna Kumar2 <krkumar2@in.ibm.com>,
	habanero@linux.vnet.ibm.com, lguest@lists.ozlabs.org,
	Shirley Ma <xma@us.ibm.com>,
	kvm@vger.kernel.org, Carsten Otte <cotte@de.ibm.com>,
	linux-s390@vger.kernel.org,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org, steved@us.ibm.com,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	netdev@vger.kernel.org,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	linux390@de.ibm.com
Subject: Re: RFT: virtio_net: limit xmit polling
Date: Fri, 24 Jun 2011 05:50:33 -0700	[thread overview]
Message-ID: <CA29D629.2C9B1%roprabhu@cisco.com> (raw)
In-Reply-To: <201106211023.24643.tahm@linux.vnet.ibm.com>

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Michael,  

I am testing this too.
 I have finished one round of testing. But am running it again just to
confirm.
This time I will see if I can collect some exit stats too. Will post results
sometime this weekend.
I am just doing TCP_STREAM and TCP_MAERTS from guest to remote host.

Thanks,
Roopa

On 6/21/11 8:23 AM, "Tom Lendacky" <tahm@linux.vnet.ibm.com> wrote:

> On Sunday, June 19, 2011 05:27:00 AM Michael S. Tsirkin wrote:
>> > OK, different people seem to test different trees.  In the hope to get
>> > everyone on the same page, I created several variants of this patch so
>> > they can be compared. Whoever's interested, please check out the
>> > following, and tell me how these compare:
> 
> I'm in the process of testing these patches.  Base and v0 are complete
> and v1 is near complete with v2 to follow.  I'm testing with a variety
> of TCP_RR and TCP_STREAM/TCP_MAERTS tests involving local guest-to-guest
> tests and remote host-to-guest tests.  I'll post the results in the next
> day or two when the tests finish.
> 
> Thanks,
> Tom
> 
>> >
>> > kernel:
>> >
>> > git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git
>> >
>> > virtio-net-limit-xmit-polling/base - this is net-next baseline to test
>> > against virtio-net-limit-xmit-polling/v0 - fixes checks on out of capacity
>> > virtio-net-limit-xmit-polling/v1 - previous revision of the patch
>> >               this does xmit,free,xmit,2*free,free
>> > virtio-net-limit-xmit-polling/v2 - new revision of the patch
>> >               this does free,xmit,2*free,free
>> >
>> > There's also this on top:
>> > virtio-net-limit-xmit-polling/v3 -> don't delay avail index update
>> > I don't think it's important to test this one, yet
>> >
>> > Userspace to use: event index work is not yet merged upstream
>> > so the revision to use is still this:
>> > git://git.kernel.org/pub/scm/linux/kernel/git/mst/qemu-kvm.git
>> > virtio-net-event-idx-v3
> 

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