Re: [Xen-devel] Xen 3.4.1 NUMA support

[Dulloor <dulloor@xxxxxxxxx>]

George,

What's the current scope and status of your scheduler work ? Is it
going to look similar to the Linux scheduler (with scheduling domains,
et al). In that case, topology is already accounted for, to a large
extent. It would be good to know so that I can work on something that
doesn't overlap.

-dulloor

On Mon, Nov 9, 2009 at 6:33 AM, George Dunlap
<george.dunlap@xxxxxxxxxxxxx> wrote:
> I haven't had time to look at NUMA stuff at all.  I probably will look at it
> eventually, if no one else does, but I'd be happy if someone else could
> pursue it.
>
> -George
>
> Dan Magenheimer wrote:
>>
>> VMware has the notion of a "cell" where VMs can be
>> scheduled only within a cell, not across cells.
>> Cell boundaries are determined by VMware by
>> default, though certains settings can override them.
>>
>> An interesting project might be to implement
>> "numa=cell" for Xen.... or maybe something similar
>> is already in George Dunlap's scheduler plans?
>>
>>
>>>
>>> -----Original Message-----
>>> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
>>> Sent: Wednesday, November 04, 2009 5:33 AM
>>> To: Papagiannis Anastasios; xen-devel@xxxxxxxxxxxxxxxxxxx
>>> Subject: Re: [Xen-devel] Xen 3.4.1 NUMA support
>>>
>>>
>>> Add Xen boot parameter 'numa=on' to enable NUMA detection. Then it's up
>>> to
>>> you to, for example, pin domains to specific nodes, using the 'cpus=...'
>>> option in the domain config file. See /etc/xen/xmexample1 for an example
>>> of
>>> its usage.
>>>
>>>  -- Keir
>>>
>>> On 04/11/2009 12:02, "Papagiannis Anastasios" <apapag@xxxxxxxxxxxx>
>>> wrote:
>>>
>>>
>>>>
>>>> Hello,
>>>>
>>>> does the last version of Xen(3.4.1) support NUMA machines?
>>>
>>> Is there a .pdf
>>>
>>>>
>>>> or a link that can give me some more details about that? I work on a
>>>> project for xen performace in numa machines. And in xen 3.3.0 this
>>>> performance isn't good. Have something changed in last version?
>>>>
>>>> Thanks in advance,
>>>> Papagiannis Anastasios
>>>>
>>>>
>>>> _______________________________________________
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>>>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>>>> http://lists.xensource.com/xen-devel
>>>>
>>>
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>>>
>>>
>
>
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>

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