linux-kernel - Re: [PATCHv2 RFC 0/4] virtio and vhost-net capacity handling

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Message-ID: <OFA835D731.5CFF0BC8-ON652578AE.004A7516-652578AE.004AAAA8@in.ibm.com>
Date:	Mon, 13 Jun 2011 19:08:51 +0530
From:	Krishna Kumar2 <krkumar2@...ibm.com>
To:	Krishna Kumar2 <krkumar2@...ibm.com>
Cc:	Christian Borntraeger <borntraeger@...ibm.com>,
	Carsten Otte <cotte@...ibm.com>, habanero@...ux.vnet.ibm.com,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	kvm@...r.kernel.org, lguest@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
	linux390@...ibm.com, "Michael S. Tsirkin" <mst@...hat.com>,
	netdev@...r.kernel.org, netdev-owner@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Martin Schwidefsky <schwidefsky@...ibm.com>, steved@...ibm.com,
	Tom Lendacky <tahm@...ux.vnet.ibm.com>,
	virtualization@...ts.linux-foundation.org,
	Shirley Ma <xma@...ibm.com>
Subject: Re: [PATCHv2 RFC 0/4] virtio and vhost-net capacity handling

> Krishna Kumar2/India/IBM@...IN wrote on 06/13/2011 07:02:27 PM:

...

> With 16K, there was an improvement in SD, but
> higher sessions seem to slightly degrade BW/SD:

I meant to say "With 16K, there was an improvement in BW"
above. Again the numbers are not very reproducible,
I will test with remote host also to see if I get more
consistent numbers.

Thanks,

- KK

>
> ______________________________
> #sessions  BW%      SD%
> ______________________________
> 1          30.9    -25.0
> 2          16.5    -19.4
> 4         -1.3      7.9
> 8          1.4      6.2
> 16         3.9     -5.4
> 32         0        4.3
> 48        -.5        .1
> 64         32.1    -1.5
> 96        -2.1      23.2
> 128       -7.4      3.8
> ______________________________
> BW: 5.0          SD: 7.5

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