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Re: [Xen-devel] [PATCH RFC V4 0/5] kvm : Paravirt-spinlock support for KVM guests
- To: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
- From: Avi Kivity <avi@xxxxxxxxxx>
- Date: Mon, 16 Jan 2012 15:49:37 +0200
- Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxx>, Gleb Natapov <gleb@xxxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Jan Kiszka <jan.kiszka@xxxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Randy Dunlap <rdunlap@xxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Xen <xen-devel@xxxxxxxxxxxxxxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, Glauber Costa <glommer@xxxxxxxxxx>, X86 <x86@xxxxxxxxxx>, Alexander Graf <agraf@xxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>, Sasha Levin <levinsasha928@xxxxxxxxx>, Sedat Dilek <sedat.dilek@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>, Suzuki Poulose <suzuki@xxxxxxxxxxxxxxxxxx>, Rob Landley <rlandley@xxxxxxxxxxxxx>
- Delivery-date: Wed, 18 Jan 2012 10:35:17 +0000
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
On 01/16/2012 03:43 PM, Raghavendra K T wrote:
>>> 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.
Perhaps the PLE stuff fights with the PV stuff?
--
error compiling committee.c: too many arguments to function
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