[ewg] Re: [PATCH 0/5]: Improve small UDP messages

Or Gerlitz ogerlitz at voltaire.com
Sun Feb 3 04:44:50 PST 2008


Eli Cohen wrote:
> On Thu, 2008-01-31 at 21:57 -0800, Shirley Ma wrote:
>> On Fri, 2008-02-01 at 15:40 +0200, Eli Cohen wrote:

>>> On the receive side the code is changed to post to receive queue once in
>>> 16 completions. This is done in for both UD and and CM.

>> Ohmm, have you tested latency? I think it will increase latency for
>> small messages.

> I see also improvement in latency. I used netperf -t UDP_RR and -t
> TCP_RR and in both cases I improvement.

Shirley,

batched posting of send work requests might hurt latency, but I don't 
see why batched posting of receive work requests would do that?

Or.





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