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Re: [Qemu-devel] QEMU NUMA and memory allocation problem
From: |
Wanlong Gao |
Subject: |
Re: [Qemu-devel] QEMU NUMA and memory allocation problem |
Date: |
Fri, 17 May 2013 15:47:52 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130402 Thunderbird/17.0.5 |
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
>
>