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From: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
To: Ingo Molnar <mingo@elte.hu>, Avi Kivity <avi@redhat.com>
Cc: peterz@infradead.org, linux-kernel@vger.kernel.org,
	vatsa@linux.vnet.ibm.com, bharata@linux.vnet.ibm.com
Subject: Re: [RFC PATCH 0/4] Gang scheduling in CFS
Date: Mon, 02 Jan 2012 09:50:30 +0530	[thread overview]
Message-ID: <87ty4erb01.fsf@abhimanyu.in.ibm.com> (raw)
In-Reply-To: <87pqf5mqg4.fsf@abhimanyu.in.ibm.com>

On Sat, 31 Dec 2011 07:51:15 +0530, Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> wrote:
> On Fri, 30 Dec 2011 15:40:06 +0530, Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> wrote:
> > On Fri, 30 Dec 2011 10:51:47 +0100, Ingo Molnar <mingo@elte.hu> wrote:
> > > 
> > > * Avi Kivity <avi@redhat.com> wrote:
> > > 
> > > > [...]
> > > > 
> > > > The first part appears to be unrelated to ebizzy itself - it's 
> > > > the kunmap_atomic() flushing ptes.  It could be eliminated by 
> > > > switching to a non-highmem kernel, or by allocating more PTEs 
> > > > for kmap_atomic() and batching the flush.
> > > 
> > > Nikunj, please only run pure 64-bit/64-bit combinations - by the 
> > > time any fix goes upstream and trickles down to distros 32-bit 
> > > guests will be even less relevant than they are today.
> > > 
> > Sure Ingo, got a 64bit guest working yesterday and I am in process of
> > getting the benchmark numbers for the same.
> > 
> Here is the results collected from the 64bit VM runs. 
> 
[...]

PLE worst case:

>      
>     dbench 8vm (degraded -8%)
>     |      dbench|               2.27 |               2.09 |       -8 |
[...]
>     dbench needs some more love, i will get the perf top caller for
>     that.
>

    Baseline:
    75.18%         init  [kernel.kallsyms]  [k] native_safe_halt
    23.32%      swapper  [kernel.kallsyms]  [k] native_safe_halt

    Gang V2:
    73.21%         init  [kernel.kallsyms]       [k] native_safe_halt
    25.74%      swapper  [kernel.kallsyms]       [k] native_safe_halt

That does not give much clue :(
Comments?

>     non-PLE - Test Setup:
> 
>     dbench 8vm (degraded -30%)
>     |      dbench|               2.01 |               1.38 |      -30 |


    Baseline:
    57.75%         init  [kernel.kallsyms]  [k] native_safe_halt
    40.88%      swapper  [kernel.kallsyms]  [k] native_safe_halt

    Gang V2:
    56.25%         init  [kernel.kallsyms]  [k] native_safe_halt
    42.84%      swapper  [kernel.kallsyms]  [k] native_safe_halt

Similar comparison here.

Regards
Nikunj


  reply	other threads:[~2012-01-02  4:24 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-19  8:33 [RFC PATCH 0/4] Gang scheduling in CFS Nikunj A. Dadhania
2011-12-19  8:34 ` [RFC PATCH 1/4] sched: Adding cpu.gang file to cpu cgroup Nikunj A. Dadhania
2011-12-19  8:34 ` [RFC PATCH 2/4] sched: Adding gang scheduling infrastrucure Nikunj A. Dadhania
2011-12-19 15:51   ` Peter Zijlstra
2011-12-19 16:51     ` Peter Zijlstra
2011-12-20  1:43       ` Nikunj A Dadhania
2011-12-20  1:39     ` Nikunj A Dadhania
2011-12-19  8:34 ` [RFC PATCH 3/4] sched: Gang using set_next_buddy Nikunj A. Dadhania
2011-12-19  8:35 ` [RFC PATCH 4/4] sched:Implement set_gang_buddy Nikunj A. Dadhania
2011-12-19 15:51   ` Peter Zijlstra
2011-12-20  1:43     ` Nikunj A Dadhania
2011-12-26  2:30     ` Nikunj A Dadhania
2011-12-19 11:23 ` [RFC PATCH 0/4] Gang scheduling in CFS Ingo Molnar
2011-12-19 11:44   ` Avi Kivity
2011-12-19 11:50     ` Nikunj A Dadhania
2011-12-19 11:59       ` Avi Kivity
2011-12-19 12:06         ` Nikunj A Dadhania
2011-12-19 12:50           ` Avi Kivity
2011-12-19 13:09             ` Nikunj A Dadhania
2011-12-19 11:45   ` Nikunj A Dadhania
2011-12-19 13:22     ` Nikunj A Dadhania
2011-12-19 16:28       ` Ingo Molnar
2011-12-21 10:39   ` Nikunj A Dadhania
2011-12-21 10:43     ` Avi Kivity
2011-12-23  3:20       ` Nikunj A Dadhania
2011-12-23 10:36         ` Ingo Molnar
2011-12-25 10:58           ` Avi Kivity
2011-12-25 15:45             ` Avi Kivity
2011-12-26  3:14             ` Nikunj A Dadhania
2011-12-26  9:05               ` Avi Kivity
2011-12-26 11:33                 ` Nikunj A Dadhania
2011-12-26 11:41                   ` Avi Kivity
2011-12-27  1:47                     ` Nikunj A Dadhania
2011-12-27  9:15                       ` Avi Kivity
2011-12-27 10:24                         ` Nikunj A Dadhania
2011-12-29 16:07                 ` Better qemu/kvm defaults (was Re: [RFC PATCH 0/4] Gang scheduling in CFS) Dor Laor
2011-12-29 16:07                   ` [Qemu-devel] " Dor Laor
2011-12-29 16:13                   ` Avi Kivity
2011-12-29 16:13                     ` [Qemu-devel] " Avi Kivity
2011-12-29 16:16                   ` Anthony Liguori
2011-12-29 16:16                     ` Anthony Liguori
2012-01-01 10:16                     ` Dor Laor
2012-01-01 10:16                       ` [Qemu-devel] " Dor Laor
2012-01-01 14:01                       ` Ronen Hod
2012-01-01 14:01                         ` Ronen Hod
2012-01-02  9:37                         ` Dor Laor
2012-01-02  9:37                           ` [Qemu-devel] " Dor Laor
2012-01-03 15:48                       ` Anthony Liguori
2012-01-03 15:48                         ` Anthony Liguori
2012-01-03 22:31                         ` Dor Laor
2012-01-03 22:31                           ` Dor Laor
2012-01-03 22:45                           ` Anthony Liguori
2012-01-03 22:45                             ` [Qemu-devel] " Anthony Liguori
2012-01-03 22:59                             ` Dor Laor
2012-01-03 22:59                               ` Dor Laor
2011-12-27  3:15               ` [RFC PATCH 0/4] Gang scheduling in CFS Nikunj A Dadhania
2011-12-27  9:17                 ` Avi Kivity
2011-12-27  9:44                   ` Nikunj A Dadhania
2011-12-27  9:51                     ` Avi Kivity
2011-12-27 10:10                       ` Nikunj A Dadhania
2011-12-27 10:34                         ` Avi Kivity
2011-12-27 10:43                           ` Nikunj A Dadhania
2011-12-27 10:53                             ` Avi Kivity
2011-12-30  9:51             ` Ingo Molnar
2011-12-30 10:10               ` Nikunj A Dadhania
2011-12-31  2:21                 ` Nikunj A Dadhania
2012-01-02  4:20                   ` Nikunj A Dadhania [this message]
2012-01-02  9:39                     ` Avi Kivity
2012-01-02 10:22                       ` Nikunj A Dadhania
2012-01-02  9:37                   ` Avi Kivity
2012-01-02 10:30                     ` Nikunj A Dadhania
2012-01-02 13:33                       ` Avi Kivity
2012-01-04 10:52                     ` Nikunj A Dadhania
2012-01-04 14:41                       ` Avi Kivity
2012-01-04 14:56                         ` Srivatsa Vaddagiri
2012-01-04 17:13                           ` Avi Kivity
2012-01-05  6:57                             ` Nikunj A Dadhania
2012-01-04 16:47                         ` Rik van Riel
2012-01-04 17:16                           ` Avi Kivity
2012-01-04 20:56                             ` Rik van Riel
2012-01-04 21:31                             ` Peter Zijlstra
2012-01-04 21:41                               ` Avi Kivity
2012-01-05  9:10                                 ` Ingo Molnar
2012-02-20  8:08                                   ` Nikunj A Dadhania
2012-02-20  8:14                                     ` Ingo Molnar
2012-02-20 10:51                                     ` Peter Zijlstra
2012-02-20 11:53                                       ` Nikunj A Dadhania
2012-02-20 12:02                                         ` Srivatsa Vaddagiri
2012-02-20 12:14                                           ` Peter Zijlstra
2012-01-05  2:10                         ` Nikunj A Dadhania
2011-12-19 15:51 ` Peter Zijlstra
2011-12-19 16:09   ` Alan Cox
2011-12-19 22:10   ` Benjamin Herrenschmidt
2011-12-20  1:56   ` Nikunj A Dadhania
2011-12-20  8:52   ` Jeremy Fitzhardinge

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