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From: Wanlong Gao <gaowanlong@cn.fujitsu.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel <qemu-devel@nongnu.org>,
	Wanlong Gao <gaowanlong@cn.fujitsu.com>,
	ehabkost@redhat.com
Subject: Re: [Qemu-devel] QEMU NUMA and memory allocation problem
Date: Fri, 17 May 2013 15:47:52 +0800	[thread overview]
Message-ID: <5195E0A8.8060605@cn.fujitsu.com> (raw)
In-Reply-To: <5194CAC3.9040908@redhat.com>

On 05/16/2013 08:02 PM, Paolo Bonzini wrote:
> Il 16/05/2013 11:50, Wanlong Gao ha scritto:
>> To see that this 300M memory is allocated from host node0 again, but not host node1 as
>> I expected.
>>
>> We think that QEMU can't handled this numa memory allocation well, and it will cause the
>> cross node memory access performance regression.
>>
>> Any thoughts? Or, am I missing something?
> 
> Pinning memory to host NUMA nodes is not implemented.  Something like
> AutoNUMA would be able to balance the memory the right way.

Any plan to implement this? Or, handle this by QEMU is not necessary?
I just enabled AutoNUMA on the host kernel, but the memory allocation
numbers seems no change at all. Am I missing something?

Thanks,
Wanlong Gao

> 
> Paolo
> 
> 

  reply	other threads:[~2013-05-17  7:48 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-16  9:50 [Qemu-devel] QEMU NUMA and memory allocation problem Wanlong Gao
2013-05-16 12:02 ` Paolo Bonzini
2013-05-17  7:47   ` Wanlong Gao [this message]
2013-05-17 13:36     ` Eduardo Habkost
2013-05-20  2:03 ` Wanlong Gao
2013-05-20  2:03   ` Wanlong Gao
2013-05-20  3:03   ` Wanpeng Li
2013-05-20  3:03   ` [Qemu-devel] " Wanpeng Li
2013-05-20  3:03   ` Wanpeng Li
2013-05-20  3:03     ` Wanpeng Li

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