From: "Michael S. Tsirkin" <mst@mellanox.co.il>
To: Felix Marti <felix@chelsio.com>
Cc: Steve Wise <swise@opengridcomputing.com>,
Roland Dreier <rdreier@cisco.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
openib-general@openib.org
Subject: Re: [PATCH v4 01/13] Linux RDMA Core Changes
Date: Sat, 6 Jan 2007 19:34:40 +0200 [thread overview]
Message-ID: <20070106173439.GC26997@mellanox.co.il> (raw)
In-Reply-To: <8A71B368A89016469F72CD08050AD334F3BE50@maui.asicdesigners.com>
> [Felix Marti] In addition, is arming the CQ really in the performance
> path? - Don't apps poll the CQ as long as there are pending CQEs and
> only arm the CQ for notification once there is nothing left to do? If
> this is the case, it would mean that we waste a few cycles 'idle'
> cycles.
Applications such as IPoIB might queue up packets, then ARM the CQ,
and only then they are processed by the upper layers in the stack.
So arming the CQ is on hot datapath.
--
MST
next prev parent reply other threads:[~2007-01-06 17:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-05 17:32 [openib-general] " Felix Marti
2007-01-05 18:59 ` Steve Wise
2007-01-06 17:34 ` Michael S. Tsirkin [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-12-14 13:52 [PATCH v4 00/13] 2.6.20 Chelsio T3 RDMA Driver Steve Wise
2006-12-14 13:53 ` [PATCH v4 01/13] Linux RDMA Core Changes Steve Wise
2006-12-24 8:49 ` Michael S. Tsirkin
2007-01-03 14:25 ` Steve Wise
2007-01-03 14:41 ` Michael S. Tsirkin
2007-01-03 14:56 ` Steve Wise
2007-01-03 15:00 ` Michael S. Tsirkin
2007-01-03 15:07 ` Steve Wise
2007-01-03 15:18 ` Michael S. Tsirkin
2007-01-03 19:17 ` Steve Wise
2007-01-03 19:33 ` Michael S. Tsirkin
2007-01-03 20:20 ` Steve Wise
2007-01-03 21:22 ` [openib-general] " Steve Wise
2007-01-04 5:07 ` Michael S. Tsirkin
2007-01-04 14:07 ` Steve Wise
2007-01-03 15:02 ` Michael S. Tsirkin
2007-01-03 15:06 ` Steve Wise
2007-01-03 15:10 ` Michael S. Tsirkin
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