From: Gleb Natapov <gleb@redhat.com>
To: Gregory Haskins <gregory.haskins@gmail.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>,
Avi Kivity <avi@redhat.com>, Ingo Molnar <mingo@elte.hu>,
kvm@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>,
torvalds@linux-foundation.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
netdev@vger.kernel.org,
"alacrityvm-devel@lists.sourceforge.net"
<alacrityvm-devel@lists.sourceforge.net>
Subject: Re: [GIT PULL] AlacrityVM guest drivers for 2.6.33
Date: Tue, 22 Dec 2009 09:22:13 +0200 [thread overview]
Message-ID: <20091222072213.GY4490@redhat.com> (raw)
In-Reply-To: <4B2FB3F1.5080808@gmail.com>
On Mon, Dec 21, 2009 at 12:44:17PM -0500, Gregory Haskins wrote:
> > They should be relatively rare
> > because obtaining good receive batching is pretty easy.
>
> Batching is poor mans throughput (its easy when you dont care about
> latency), so we generally avoid as much as possible.
>
> > Considering
> > these are lightweight exits (on the order of 1-2us),
>
> APIC EOIs on x86 are MMIO based, so they are generally much heavier than
> that. I measure at least 4-5us just for the MMIO exit on my Woodcrest,
> never mind executing the locking/apic-emulation code.
>
With x2apic EOIs are not MMIO any longer.
--
Gleb.
next prev parent reply other threads:[~2009-12-22 7:23 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-07 18:53 [GIT PULL] AlacrityVM guest drivers for 2.6.33 Gregory Haskins
2009-12-18 21:51 ` Ingo Molnar
2009-12-21 15:34 ` Gregory Haskins
2009-12-21 15:43 ` Avi Kivity
2009-12-21 16:04 ` Gregory Haskins
2009-12-21 16:37 ` Anthony Liguori
2009-12-21 16:40 ` Avi Kivity
2009-12-21 16:56 ` Gregory Haskins
2009-12-21 17:05 ` Avi Kivity
2009-12-21 17:24 ` Gregory Haskins
2009-12-21 16:46 ` Gregory Haskins
2009-12-21 17:20 ` Anthony Liguori
2009-12-21 17:44 ` Gregory Haskins
2009-12-22 0:12 ` Anthony Liguori
2009-12-22 7:59 ` Ingo Molnar
2009-12-22 11:49 ` Andi Kleen
2009-12-22 15:31 ` Anthony Liguori
2009-12-22 16:01 ` Bartlomiej Zolnierkiewicz
2009-12-22 16:21 ` Anthony Liguori
2009-12-23 6:51 ` Ingo Molnar
2009-12-23 10:13 ` Andi Kleen
2009-12-23 10:22 ` Avi Kivity
2009-12-23 12:14 ` Andi Kleen
2009-12-23 12:48 ` Avi Kivity
2009-12-23 17:00 ` Chris Wright
2009-12-23 17:20 ` Andi Kleen
2009-12-23 15:03 ` Anthony Liguori
2009-12-23 17:52 ` [Alacrityvm-devel] " Peter W. Morreale
2009-12-23 18:17 ` Gregory Haskins
2009-12-23 18:22 ` Chris Wright
2009-12-23 18:15 ` Gregory Haskins
2009-12-23 20:20 ` Avi Kivity
2009-12-23 21:21 ` Gregory Haskins
2009-12-23 21:21 ` Gregory Haskins
2009-12-27 9:15 ` Avi Kivity
2009-12-27 13:18 ` Gregory Haskins
2009-12-27 13:27 ` Avi Kivity
2009-12-27 13:39 ` Gregory Haskins
2009-12-27 13:49 ` Avi Kivity
2009-12-28 1:01 ` Gregory Haskins
2009-12-23 18:51 ` Ingo Molnar
2009-12-23 19:27 ` Andi Kleen
2009-12-23 20:26 ` Avi Kivity
2009-12-24 6:58 ` Gleb Natapov
2009-12-24 20:41 ` Roland Dreier
2009-12-23 13:07 ` Bartlomiej Zolnierkiewicz
2009-12-23 13:31 ` Avi Kivity
2009-12-23 14:08 ` Bartlomiej Zolnierkiewicz
2009-12-23 14:28 ` Avi Kivity
2009-12-23 14:57 ` Anthony Liguori
2009-12-23 18:31 ` Chris Wright
2009-12-23 16:44 ` Gregory Haskins
2009-12-23 17:10 ` Andi Kleen
2009-12-23 17:17 ` Gregory Haskins
2009-12-23 17:29 ` Linus Torvalds
2009-12-23 23:27 ` Anthony Liguori
2009-12-23 17:33 ` Andi Kleen
2009-12-23 20:36 ` Avi Kivity
2009-12-23 21:01 ` Avi Kivity
2009-12-24 9:36 ` Gregory Haskins
2009-12-27 9:33 ` Avi Kivity
2009-12-27 13:34 ` Gregory Haskins
2009-12-27 13:49 ` Avi Kivity
2009-12-27 14:29 ` Gregory Haskins
2009-12-24 9:31 ` Gregory Haskins
2009-12-27 9:29 ` Avi Kivity
2009-12-22 16:21 ` Andi Kleen
2009-12-22 16:27 ` Anthony Liguori
2009-12-22 17:33 ` Andi Kleen
2009-12-22 17:35 ` Avi Kivity
2009-12-22 21:14 ` Anthony Liguori
2009-12-23 0:02 ` Chris Wright
2009-12-23 15:12 ` Anthony Liguori
2009-12-23 15:17 ` Chris Wright
2009-12-22 17:05 ` Avi Kivity
2009-12-22 20:41 ` Gregory Haskins
2009-12-22 7:22 ` Gleb Natapov [this message]
2009-12-22 7:57 ` Ingo Molnar
2009-12-22 17:36 ` Gregory Haskins
2009-12-22 18:53 ` Avi Kivity
2009-12-22 18:56 ` Gregory Haskins
2009-12-22 19:15 ` Gregory Haskins
2009-12-22 19:25 ` Avi Kivity
2009-12-22 19:32 ` Gregory Haskins
2009-12-22 19:37 ` Gregory Haskins
2009-12-22 19:38 ` Avi Kivity
2009-12-22 19:41 ` Gregory Haskins
2009-12-22 19:43 ` Avi Kivity
2009-12-22 19:47 ` Gregory Haskins
2009-12-22 19:40 ` Avi Kivity
2009-12-22 19:39 ` Davide Libenzi
2009-12-22 19:53 ` Gregory Haskins
2009-12-23 1:05 ` Davide Libenzi
2009-12-23 6:15 ` Kyle Moffett
2009-12-23 15:09 ` Anthony Liguori
2009-12-23 19:54 ` [Alacrityvm-devel] " Ira W. Snyder
2009-12-23 22:58 ` Anthony Liguori
2009-12-23 23:42 ` Ira W. Snyder
2009-12-24 17:09 ` Anthony Liguori
2009-12-25 0:38 ` Ira W. Snyder
2009-12-24 4:52 ` Kyle Moffett
2009-12-24 16:57 ` Anthony Liguori
2009-12-23 17:34 ` Gregory Haskins
2009-12-23 19:28 ` Ira W. Snyder
2009-12-23 19:50 ` Andi Kleen
2009-12-24 10:01 ` Michael S. Tsirkin
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