From: Gleb Natapov <gleb@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Chris Wright <chrisw@redhat.com>,
kvm@vger.kernel.org, qemu-devel@nongnu.org
Subject: Re: KVM call agenda for Apr 27
Date: Tue, 27 Apr 2010 16:05:56 +0300 [thread overview]
Message-ID: <20100427130556.GH10044@redhat.com> (raw)
In-Reply-To: <4BD6DFD2.7050509@codemonkey.ws>
On Tue, Apr 27, 2010 at 08:00:02AM -0500, Anthony Liguori wrote:
> On 04/27/2010 06:11 AM, Gleb Natapov wrote:
> >Network cards have low number of rx/tx buffers interrupt. This is also
> >heuristic. Do you think driver should poll for this event instead and
> >NIC designers just wasted their time designing the feature?
>
> I don't see how the two cases are at all similar.
>
They are the same. They send notification when resource is low.
> More importantly, I don't see what the burden is of polling when
> you're talking about a very unusual statistic that has a very
> limited use case.
>
Poll is the wrong answer. Always. The statistic is very common and has
wide use case unless you have unlimited storage.
--
Gleb.
WARNING: multiple messages have this Message-ID (diff)
From: Gleb Natapov <gleb@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Chris Wright <chrisw@redhat.com>,
qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: [Qemu-devel] Re: KVM call agenda for Apr 27
Date: Tue, 27 Apr 2010 16:05:56 +0300 [thread overview]
Message-ID: <20100427130556.GH10044@redhat.com> (raw)
In-Reply-To: <4BD6DFD2.7050509@codemonkey.ws>
On Tue, Apr 27, 2010 at 08:00:02AM -0500, Anthony Liguori wrote:
> On 04/27/2010 06:11 AM, Gleb Natapov wrote:
> >Network cards have low number of rx/tx buffers interrupt. This is also
> >heuristic. Do you think driver should poll for this event instead and
> >NIC designers just wasted their time designing the feature?
>
> I don't see how the two cases are at all similar.
>
They are the same. They send notification when resource is low.
> More importantly, I don't see what the burden is of polling when
> you're talking about a very unusual statistic that has a very
> limited use case.
>
Poll is the wrong answer. Always. The statistic is very common and has
wide use case unless you have unlimited storage.
--
Gleb.
next prev parent reply other threads:[~2010-04-27 13:06 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-26 17:26 KVM call agenda for Apr 27 Chris Wright
2010-04-26 17:26 ` [Qemu-devel] " Chris Wright
2010-04-26 17:51 ` Anthony Liguori
2010-04-26 17:51 ` [Qemu-devel] " Anthony Liguori
2010-04-26 22:12 ` Chris Wright
2010-04-26 22:12 ` [Qemu-devel] " Chris Wright
2010-04-26 22:36 ` Anthony Liguori
2010-04-26 22:36 ` [Qemu-devel] " Anthony Liguori
2010-04-27 8:14 ` Avi Kivity
2010-04-27 8:14 ` [Qemu-devel] " Avi Kivity
2010-04-27 8:48 ` Dor Laor
2010-04-27 8:48 ` [Qemu-devel] " Dor Laor
2010-04-27 8:56 ` Avi Kivity
2010-04-27 8:56 ` [Qemu-devel] " Avi Kivity
2010-04-27 9:08 ` Dor Laor
2010-04-27 9:08 ` [Qemu-devel] " Dor Laor
2010-04-27 9:22 ` Avi Kivity
2010-04-27 9:22 ` [Qemu-devel] " Avi Kivity
2010-04-27 9:32 ` Dor Laor
2010-04-27 9:32 ` [Qemu-devel] " Dor Laor
2010-04-27 9:41 ` Kevin Wolf
2010-04-27 9:41 ` [Qemu-devel] " Kevin Wolf
2010-04-27 13:15 ` Anthony Liguori
2010-04-27 13:15 ` [Qemu-devel] " Anthony Liguori
2010-04-27 9:16 ` Kevin Wolf
2010-04-27 9:16 ` [Qemu-devel] " Kevin Wolf
2010-04-27 9:28 ` Avi Kivity
2010-04-27 9:28 ` [Qemu-devel] " Avi Kivity
2010-04-27 13:03 ` Anthony Liguori
2010-04-27 13:03 ` [Qemu-devel] " Anthony Liguori
2010-04-27 13:08 ` Avi Kivity
2010-04-27 13:08 ` [Qemu-devel] " Avi Kivity
2010-04-27 13:11 ` Daniel P. Berrange
2010-04-27 13:11 ` [Qemu-devel] " Daniel P. Berrange
2010-04-27 13:15 ` Gleb Natapov
2010-04-27 13:15 ` [Qemu-devel] " Gleb Natapov
2010-04-27 13:38 ` Daniel P. Berrange
2010-04-27 13:38 ` [Qemu-devel] " Daniel P. Berrange
2010-04-27 14:10 ` Gleb Natapov
2010-04-27 14:10 ` [Qemu-devel] " Gleb Natapov
2010-04-27 8:53 ` Kevin Wolf
2010-04-27 13:10 ` Anthony Liguori
2010-04-27 13:18 ` Kevin Wolf
2010-04-27 13:21 ` Anthony Liguori
2010-04-27 13:42 ` Kevin Wolf
2010-04-27 13:48 ` Anthony Liguori
2010-04-27 13:58 ` Kevin Wolf
2010-04-27 14:01 ` Anthony Liguori
2010-04-27 11:11 ` Gleb Natapov
2010-04-27 11:11 ` [Qemu-devel] " Gleb Natapov
2010-04-27 13:00 ` Anthony Liguori
2010-04-27 13:00 ` [Qemu-devel] " Anthony Liguori
2010-04-27 13:05 ` Gleb Natapov [this message]
2010-04-27 13:05 ` Gleb Natapov
2010-04-27 13:19 ` Anthony Liguori
2010-04-27 13:19 ` [Qemu-devel] " Anthony Liguori
2010-04-27 13:29 ` Gleb Natapov
2010-04-27 13:29 ` [Qemu-devel] " Gleb Natapov
2010-04-27 1:15 ` Luiz Capitulino
2010-04-27 1:15 ` Luiz Capitulino
2010-04-27 3:39 ` Aurelien Jarno
2010-04-27 3:39 ` Aurelien Jarno
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