[openib-general] Re: [PATCH 07/16] ehca: interrupt handling routines

[Shirley Ma]

"Michael S. Tsirkin" <mst at mellanox.co.il> wrote on 05/09/2006 11:44:52 AM:

> Quoting r. Shirley Ma <xma at us.ibm.com>:
> > According to some results from different resouces, NAPI only gives
> 3%-10% performance improvement on single CQ.
> 
> When you say performance you mean bandwidth.
> But I think it should improve the CPU utilization on RX side 
significantly.
> If it does, that an important metric as well.

No, CPU utilization wasn't reduced. When you use single CQ, NAPI polls on 
both RX/TX.

> > I am trying a simple NAPI patch on splitting CQ now to see how 
> much performance there.
> 
> What are you using for a benchmark?
> 
> -- 
> MST

netperf, iperf, mpstat, netpipe, oprofiling, what's your suggestion?

Thanks
Shirley Ma
IBM Linux Technology Center
15300 SW Koll Parkway
Beaverton, OR 97006-6063
Phone(Fax): (503) 578-7638




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