On Wed, Feb 02, 2011 at 07:42:51AM -0800, Shirley Ma wrote:

On Wed, 2011-02-02 at 12:49 +0200, Michael S. Tsirkin wrote:

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On Tue, Feb 01, 2011 at 11:33:49PM -0800, Shirley Ma wrote:

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On Tue, 2011-02-01 at 23:14 -0800, Shirley Ma wrote:

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w/i guest change, I played around the parameters,for example: I

could

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get 3.7Gb/s with 42% CPU BW increasing from 2.5Gb/s for 1K message
size,
w/i dropping packet, I was able to get up to 6.2Gb/s with similar

CPU

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usage. 

I meant w/o guest change, only vhost changes. Sorry about that.

Shirley

Ah, excellent. What were the parameters? 

I used half of the ring size 129 for packet counters, but the
performance is still not as good as dropping packets on guest, 3.7 Gb/s
vs. 6.2Gb/s.

Shirley

And this is with sndbuf=0 in host, yes?
And do you see a lot of tx interrupts?
How packets per interrupt?

-- 
MST