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Date: Thu, 5 May 2011 18:37:27 +0300
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Krishna Kumar2 <krkumar2@...ibm.com>
Cc: davem@...emloft.net, eric.dumazet@...il.com, kvm@...r.kernel.org,
netdev@...r.kernel.org, netdev-owner@...r.kernel.org,
rusty@...tcorp.com.au
Subject: Re: [PATCH 0/4] [RFC] virtio-net: Improve small packet performance
On Thu, May 05, 2011 at 09:06:00PM +0530, Krishna Kumar2 wrote:
> Krishna Kumar wrote on 05/05/2011 08:57:13 PM:
>
> Oops, I sent my patch's test results for the 16K case.
> The correct one is:
>
> ________________________________________________________
> I/O size: 16K
> # BW1 BW2 (%) SD1 SD2 (%)
> ________________________________________________________
> 1 6684 6670 (-.2) 1.1 .6 (-45.4)
> 2 7674 7859 (2.4) 5.0 2.6 (-48.0)
> 4 7358 7421 (.8) 21.3 11.6 (-45.5)
> 8 7393 7289 (-1.4) 82.7 44.8 (-45.8)
> 16 7958 7280 (-8.5) 283.2 166.3 (-41.2)
> 32 7792 7163 (-8.0) 1257.5 692.4 (-44.9)
> 64 7673 7096 (-7.5) 5723.1 2870.3 (-49.8)
> 96 7462 6963 (-6.6) 12731.8 6475.6 (-49.1)
> 128 7338 6919 (-5.7) 21331.7 12345.7 (-42.1)
> ________________________________________________________
> Summary: BW: (-3.9) SD: (-45.4)
>
> Sorry for the confusion.
>
> Regards,
>
> - KK
Interesting. So which is which?
> > ________________________________________________________
> > I/O size: 16K
> > # BW1 BW2 (%) SD1 SD2 (%)
> > ________________________________________________________
> > 1 6684 7019 (5.0) 1.1 1.1 (0)
> > 2 7674 7196 (-6.2) 5.0 4.8 (-4.0)
> > 4 7358 8032 (9.1) 21.3 20.4 (-4.2)
> > 8 7393 8015 (8.4) 82.7 82.0 (-.8)
> > 16 7958 8366 (5.1) 283.2 310.7 (9.7)
> > 32 7792 8113 (4.1) 1257.5 1363.0 (8.3)
> > 64 7673 8040 (4.7) 5723.1 5812.4 (1.5)
> > 96 7462 7883 (5.6) 12731.8 12119.8 (-4.8)
> > 128 7338 7800 (6.2) 21331.7 21094.7 (-1.1)
> > ________________________________________________________
> > Summary: BW: (4.6) SD: (-1.5)
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