From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
To: Alexander Graf <agraf@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
Greg Kroah-Hartman <gregkh@suse.de>,
linux-doc@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
Jan Kiszka <jan.kiszka@siemens.com>,
Virtualization <virtualization@lists.linux-foundation.org>,
Paul Mackerras <paulus@samba.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Xen <xen-devel@lists.xensource.com>,
Dave Jiang <dave.jiang@intel.com>, KVM <kvm@vger.kernel.org>,
Glauber Costa <glommer@redhat.com>, X86 <x86@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Avi Kivity <avi@redhat.com>,
Rik van Riel <riel@redhat.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
Sasha Levin <levinsasha928@gmail.com>,
Sedat Dilek <sedat.dilek@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>, Dave Hansen <dave@linu>
Subject: Re: [PATCH RFC V4 0/5] kvm : Paravirt-spinlock support for KVM guests
Date: Mon, 16 Jan 2012 19:13:07 +0530 [thread overview]
Message-ID: <4F14296B.4070003@linux.vnet.ibm.com> (raw)
In-Reply-To: <3EC1B881-0724-49E3-B892-F40BEB07D15D@suse.de>
On 01/16/2012 09:27 AM, Alexander Graf wrote:
>
[...]
>> Result for PLE machine:
>> ======================
>> Machine : IBM xSeries with Intel(R) Xeon(R) X7560 2.27GHz CPU with 32/64 core, with 8
>> online cores and 4*64GB RAM
>>
>> Kernbench:
>> BASE BASE+patch %improvement
>> mean (sd) mean (sd)
>> Scenario A:
>> case 1x: 161.263 (56.518) 159.635 (40.5621) 1.00953
>> case 2x: 190.748 (61.2745) 190.606 (54.4766) 0.0744438
>> case 3x: 227.378 (100.215) 225.442 (92.0809) 0.851446
>>
>> Scenario B:
>> 446.104 (58.54 ) 433.12733 (54.476) 2.91
>>
>> Dbench:
>> Throughput is in MB/sec
>> NRCLIENTS BASE BASE+patch %improvement
>> mean (sd) mean (sd)
>> 8 1.101190 (0.875082) 1.700395 (0.846809) 54.4143
>> 16 1.524312 (0.120354) 1.477553 (0.058166) -3.06755
>> 32 2.143028 (0.157103) 2.090307 (0.136778) -2.46012
>
> So on a very contended system we're actually slower? Is this expected?
>
>
I think, the result is interesting because its PLE machine. I have to
experiment more with parameters, SPIN_THRESHOLD, and also may be ple_gap
and ple_window.
> Alex
>
>
next prev parent reply other threads:[~2012-01-16 13:43 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-14 18:25 [PATCH RFC V4 0/5] kvm : Paravirt-spinlock support for KVM guests Raghavendra K T
2012-01-14 18:25 ` [PATCH RFC V4 1/5] debugfs: Add support to print u32 array in debugfs Raghavendra K T
2012-01-14 18:25 ` [PATCH RFC V4 2/5] kvm hypervisor : Add a hypercall to KVM hypervisor to support pv-ticketlocks Raghavendra K T
2012-01-16 3:24 ` Alexander Graf
2012-01-16 8:43 ` Raghavendra K T
2012-01-16 9:03 ` Avi Kivity
2012-01-16 9:55 ` Raghavendra K T
2012-01-14 18:26 ` [PATCH RFC V4 3/5] kvm guest : Added configuration support to enable debug information for KVM Guests Raghavendra K T
2012-01-14 18:26 ` [PATCH RFC V4 4/5] kvm : pv-ticketlocks support for linux guests running on KVM hypervisor Raghavendra K T
2012-01-16 3:12 ` Alexander Graf
2012-01-16 7:25 ` Raghavendra K T
2012-01-16 9:05 ` Avi Kivity
2012-01-16 14:13 ` Raghavendra K T
2012-01-16 14:47 ` Avi Kivity
2012-01-16 23:49 ` Jeremy Fitzhardinge
2012-01-17 11:02 ` Marcelo Tosatti
2012-01-17 11:33 ` Srivatsa Vaddagiri
2012-01-18 1:34 ` Jeremy Fitzhardinge
2012-01-18 13:54 ` Srivatsa Vaddagiri
2012-01-18 21:52 ` Jeremy Fitzhardinge
2012-01-24 14:08 ` Avi Kivity
2012-01-24 18:51 ` Raghavendra K T
2012-01-17 18:57 ` Raghavendra K T
2012-01-24 19:01 ` Raghavendra K T
2012-01-14 18:27 ` [PATCH RFC V4 5/5] Documentation/kvm : Add documentation on Hypercalls and features used for PV spinlock Raghavendra K T
2012-01-16 3:57 ` [PATCH RFC V4 0/5] kvm : Paravirt-spinlock support for KVM guests Alexander Graf
2012-01-16 6:40 ` Jeremy Fitzhardinge
2012-01-16 8:55 ` Avi Kivity
2012-01-16 23:59 ` Jeremy Fitzhardinge
2012-01-18 10:48 ` Raghavendra K T
2012-01-16 10:24 ` Alexander Graf
2012-01-17 0:30 ` Jeremy Fitzhardinge
2012-01-18 10:23 ` Raghavendra K T
2012-01-16 13:43 ` Raghavendra K T [this message]
2012-01-16 13:49 ` Avi Kivity
2012-01-16 18:48 ` Raghavendra K T
2012-01-16 14:20 ` Srivatsa Vaddagiri
2012-01-16 14:23 ` Alexander Graf
2012-01-16 18:38 ` Raghavendra K T
2012-01-16 18:42 ` Alexander Graf
2012-01-17 17:27 ` Raghavendra K T
2012-01-17 17:39 ` Alexander Graf
2012-01-17 18:36 ` Raghavendra K T
2012-01-17 21:57 ` Dave Hansen
2012-01-18 2:27 ` Raghavendra K T
2012-01-25 8:55 ` Raghavendra K T
2012-01-25 16:35 ` Konrad Rzeszutek Wilk
2012-01-25 17:45 ` Raghavendra K T
2012-01-25 19:05 ` Konrad Rzeszutek Wilk
[not found] ` <20120114182710.8604.22277.sendpatchset@oc5400248562.ibm.com>
2012-01-16 3:23 ` [PATCH RFC V4 5/5] Documentation/kvm : Add documentation on Hypercalls and features used for PV spinlock Alexander Graf
2012-01-16 3:51 ` Srivatsa Vaddagiri
2012-01-16 4:00 ` Alexander Graf
2012-01-16 8:47 ` Avi Kivity
2012-01-16 8:44 ` Raghavendra K T
2012-01-16 10:26 ` Alexander Graf
2012-01-16 9:00 ` Avi Kivity
2012-01-16 9:40 ` Srivatsa Vaddagiri
2012-01-16 10:14 ` Avi Kivity
2012-01-16 14:11 ` Srivatsa Vaddagiri
2012-01-17 9:14 ` Gleb Natapov
2012-01-17 12:26 ` Srivatsa Vaddagiri
2012-01-17 12:51 ` Gleb Natapov
2012-01-17 13:11 ` Srivatsa Vaddagiri
2012-01-17 13:20 ` Gleb Natapov
2012-01-17 14:28 ` Srivatsa Vaddagiri
2012-01-17 15:32 ` Gleb Natapov
2012-01-17 15:53 ` Marcelo Tosatti
2012-01-20 15:09 ` Srivatsa Vaddagiri
2012-01-17 13:13 ` Raghavendra K T
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