linux-kernel - Re: [PATCH v4 01/13] Linux RDMA Core Changes

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Date:	Wed, 03 Jan 2007 09:06:02 -0600
From:	Steve Wise <swise@...ngridcomputing.com>
To:	"Michael S. Tsirkin" <mst@...lanox.co.il>
Cc:	Roland Dreier <rdreier@...co.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, openib-general@...nib.org
Subject: Re: [PATCH  v4 01/13] Linux RDMA Core Changes

On Wed, 2007-01-03 at 17:02 +0200, Michael S. Tsirkin wrote:
> > I've run this code with mthca and didn't notice any performance
> > degradation, but I wasn't specifically measuring cq_poll overhead in a
> > tight loop...
> 
> We were speaking about ib_req_notify_cq here, actually, not cq poll.
> So what was tested?
> 

Sorry, I meant req_notify.  I didn't specifically measure the cost of
req_notify before and after this change.

I've been running the user mode perftest programs mainly.  



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