From: Gleb Natapov <gleb@redhat.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
kvm@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, avi@redhat.com, mingo@elte.hu,
tglx@linutronix.de, hpa@zytor.com, riel@redhat.com
Subject: Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
Date: Mon, 30 Nov 2009 12:58:12 +0200 [thread overview]
Message-ID: <20091130105812.GG30150@redhat.com> (raw)
In-Reply-To: <20091130105612.GF30150@redhat.com>
On Mon, Nov 30, 2009 at 12:56:12PM +0200, Gleb Natapov wrote:
> On Tue, Nov 24, 2009 at 09:14:03AM -0600, Christoph Lameter wrote:
> > On Tue, 24 Nov 2009, Gleb Natapov wrote:
> >
> > > On Mon, Nov 23, 2009 at 11:30:02AM -0600, Christoph Lameter wrote:
> > > > This adds significant overhead for the !PREEMPT case adding lots of code
> > > > in critical paths all over the place.
> > > I want to measure it. Can you suggest benchmarks to try?
> >
> > AIM9 (reaim9)?
> Below are results for kernel 2.6.32-rc8 with and without the patch (only
> this single patch is applied).
>
Forgot to tell. The results are average between 5 different runs.
--
Gleb.
WARNING: multiple messages have this Message-ID (diff)
From: Gleb Natapov <gleb@redhat.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
kvm@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, avi@redhat.com, mingo@elte.hu,
tglx@linutronix.de, hpa@zytor.com, riel@redhat.com
Subject: Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
Date: Mon, 30 Nov 2009 12:58:12 +0200 [thread overview]
Message-ID: <20091130105812.GG30150@redhat.com> (raw)
In-Reply-To: <20091130105612.GF30150@redhat.com>
On Mon, Nov 30, 2009 at 12:56:12PM +0200, Gleb Natapov wrote:
> On Tue, Nov 24, 2009 at 09:14:03AM -0600, Christoph Lameter wrote:
> > On Tue, 24 Nov 2009, Gleb Natapov wrote:
> >
> > > On Mon, Nov 23, 2009 at 11:30:02AM -0600, Christoph Lameter wrote:
> > > > This adds significant overhead for the !PREEMPT case adding lots of code
> > > > in critical paths all over the place.
> > > I want to measure it. Can you suggest benchmarks to try?
> >
> > AIM9 (reaim9)?
> Below are results for kernel 2.6.32-rc8 with and without the patch (only
> this single patch is applied).
>
Forgot to tell. The results are average between 5 different runs.
--
Gleb.
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next prev parent reply other threads:[~2009-11-30 10:58 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-23 14:05 [PATCH v2 00/12] KVM: Add asynchronous page fault for PV guest Gleb Natapov
2009-11-23 14:05 ` Gleb Natapov
2009-11-23 14:05 ` [PATCH v2 01/12] Move kvm_smp_prepare_boot_cpu() from kvmclock.c to kvm.c Gleb Natapov
2009-11-23 14:05 ` Gleb Natapov
2009-11-23 14:05 ` [PATCH v2 02/12] Add PV MSR to enable asynchronous page faults delivery Gleb Natapov
2009-11-23 14:05 ` Gleb Natapov
2009-11-25 12:32 ` Avi Kivity
2009-11-25 12:32 ` Avi Kivity
2009-11-23 14:05 ` [PATCH v2 03/12] Add async PF initialization to PV guest Gleb Natapov
2009-11-23 14:05 ` Gleb Natapov
2009-11-23 14:05 ` [PATCH v2 04/12] Add "handle page fault" PV helper Gleb Natapov
2009-11-23 14:05 ` Gleb Natapov
2009-11-23 15:32 ` Peter Zijlstra
2009-11-23 15:32 ` Peter Zijlstra
2009-11-23 14:06 ` [PATCH v2 05/12] Handle asynchronous page fault in a PV guest Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
2009-11-25 12:45 ` Avi Kivity
2009-11-25 12:45 ` Avi Kivity
2009-11-23 14:06 ` [PATCH v2 06/12] Export __get_user_pages_fast Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
2009-11-23 14:06 ` [PATCH v2 07/12] Add get_user_pages() variant that fails if major fault is required Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
2009-11-23 14:06 ` [PATCH v2 08/12] Inject asynchronous page fault into a guest if page is swapped out Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
2009-11-25 13:03 ` Avi Kivity
2009-11-25 13:03 ` Avi Kivity
2009-11-23 14:06 ` [PATCH v2 09/12] Retry fault before vmentry Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
2009-11-25 13:09 ` Avi Kivity
2009-11-25 13:09 ` Avi Kivity
2009-11-25 13:20 ` Gleb Natapov
2009-11-25 13:20 ` Gleb Natapov
2009-11-23 14:06 ` [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
2009-11-23 15:34 ` Peter Zijlstra
2009-11-23 15:34 ` Peter Zijlstra
2009-11-23 15:58 ` Gleb Natapov
2009-11-23 15:58 ` Gleb Natapov
2009-11-23 17:30 ` Christoph Lameter
2009-11-23 17:30 ` Christoph Lameter
2009-11-24 7:12 ` Gleb Natapov
2009-11-24 7:12 ` Gleb Natapov
2009-11-24 15:14 ` Christoph Lameter
2009-11-24 15:14 ` Christoph Lameter
2009-11-30 10:56 ` Gleb Natapov
2009-11-30 10:56 ` Gleb Natapov
2009-11-30 10:58 ` Gleb Natapov [this message]
2009-11-30 10:58 ` Gleb Natapov
2009-11-30 10:59 ` Peter Zijlstra
2009-11-30 10:59 ` Peter Zijlstra
2009-11-30 11:01 ` Avi Kivity
2009-11-30 11:01 ` Avi Kivity
2009-11-30 11:05 ` Peter Zijlstra
2009-11-30 11:05 ` Peter Zijlstra
2009-11-30 16:23 ` Christoph Lameter
2009-11-30 16:23 ` Christoph Lameter
2009-11-23 14:06 ` [PATCH v2 11/12] Handle async PF in non preemptable context Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
2009-11-23 14:06 ` [PATCH v2 12/12] Send async PF when guest is not in userspace too Gleb Natapov
2009-11-23 14:06 ` Gleb Natapov
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