From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Marco Tizzoni <marco.tizzoni@gmail.com>
Cc: "Fajar A." <fajar@fajar.net>, Fasiha Ashraf <feehapk@yahoo.co.in>,
xen <xen-devel@lists.xensource.com>,
xen-users@lists.xensource.com
Subject: Re: Re: [Xen-users] About profiling xen
Date: Thu, 01 Oct 2009 14:40:44 -0700 [thread overview]
Message-ID: <4AC521DC.2020106@goop.org> (raw)
In-Reply-To: <f9611b0f0910011426w4af0b164re00104fb5a66ebd9@mail.gmail.com>
On 10/01/09 14:26, Marco Tizzoni wrote:
>> OK, good, that takes timers out of the equation.
>>
>> I guess the problem is the rate at which Xen will context switch between
>> two domains. Hm.
>>
>> Does anything change if you pin your domains to different cpus?
>>
> mmmh, no. I think without a finer timer the problem could not be solved.
>
Why's that? You said that the timers "work as expected", which I read
to mean that they will generate sub-millisecond events. Did I
misunderstand you?
> For my test application, no problem, I'll use a while() loop with
> counters and sched_yeld(),
> but, for real application, it could be a serious issue to deal with.
>
I don't see why that would be necessary if timers are working properly.
J
next prev parent reply other threads:[~2009-10-01 21:40 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-30 6:07 About profiling xen Fasiha Ashraf
2009-09-30 6:33 ` [Xen-users] " Marco Tizzoni
2009-09-30 6:37 ` Pasi Kärkkäinen
2009-09-30 6:40 ` Marco Tizzoni
2009-09-30 7:45 ` Marco Tizzoni
2009-09-30 9:06 ` [Xen-devel] " Marco Tizzoni
2009-09-30 14:21 ` Dan Magenheimer
2009-09-30 14:48 ` Re: [Xen-users] " Marco Tizzoni
2009-09-30 16:04 ` Dan Magenheimer
2009-09-30 16:38 ` Marco Tizzoni
2009-09-30 23:23 ` [Xen-devel] " Jeremy Fitzhardinge
2009-10-01 7:35 ` Marco Tizzoni
2009-10-01 20:54 ` Re: [Xen-users] " Jeremy Fitzhardinge
2009-10-01 21:05 ` [Xen-devel] " Marco Tizzoni
2009-10-01 21:16 ` Re: [Xen-users] " Jeremy Fitzhardinge
2009-10-01 21:26 ` Marco Tizzoni
2009-10-01 21:40 ` Jeremy Fitzhardinge [this message]
2009-10-01 21:55 ` [Xen-devel] " Marco Tizzoni
2009-10-01 22:01 ` Re: [Xen-users] " Jeremy Fitzhardinge
2009-10-01 22:20 ` Marco Tizzoni
2009-10-05 11:38 ` Fasiha Ashraf
2009-10-05 20:53 ` Jeremy Fitzhardinge
2009-10-06 5:01 ` [Xen-devel] " Fasiha Ashraf
2009-10-06 5:30 ` Re: [Xen-users] " Jeremy Fitzhardinge
2009-09-30 9:16 ` Fasiha Ashraf
2009-09-30 9:23 ` [Xen-devel] " Pasi Kärkkäinen
2009-10-01 3:41 ` Re: [Xen-users] " Fasiha Ashraf
2009-10-01 9:44 ` [Xen-devel] " Fasiha Ashraf
2009-09-30 23:19 ` Jeremy Fitzhardinge
2009-10-06 7:22 ` Fasiha Ashraf
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