Re: [Xen-users] XCP - Maximum CPU cores

[Dustin Marquess <dmarquess@xxxxxxxxx>]

I'm having the same issue myself. However I'm trying to stay as close
to 'stock' XCP 1.0 as possible, since I need stability.

I have the 2 source ISOs & even the xen-api.hg Mercurial repo cloned.
However, I'm not sure which piece of XCP I need to recompile.  Is it
just the hypervisor kernel itself (eg, /boot/xen-3.4.2.gz), or the
dom0 kernel, or the entire xapi?

The build instructions @
http://wiki.xen.org/xenwiki/XCP_Building_Instructions just show how to
rebuild xapi itself, not the entire XCP platform, sadly.

-Dustin

On Tue, Mar 8, 2011 at 11:51 AM, Todd Deshane <todd.deshane@xxxxxxx> wrote:
> On Tue, Mar 8, 2011 at 2:46 PM, AP Xen <apxeng@xxxxxxxxx> wrote:
>> Technically, it is possible as XCP is open source. You would have to
>> download the source ISO and rebuild Xen with nr_phys_cpus=128. Trying to
>> replace Xen in XCP with the Xen 4.x might be more difficult.
>>
>
> True it is open source and should be possible. You're going to want to
> make sure you use at least the 4.1 branch as it has better libxl
> integration.
>
> Do report any problems that you find to xen-devel. I think the
> intention is that this should work, I'm just not sure how much
> community testing we have gotten to this point. Do let us know if/when
> you test it and how you progress.
>
> Thanks,
> Todd
>
>
>>
>>
>> From: Outback Dingo [mailto:outbackdingo@xxxxxxxxx]
>> Sent: Tuesday, March 08, 2011 11:08 AM
>> To: Todd Deshane
>> Cc: AP Xen; Tapas Mishra; xen-users; Boris Quiroz
>>
>> Subject: Re: [Xen-users] XCP - Maximum CPU cores
>>
>>
>>
>> well, i need 128 cores now on XCP :( so im hardware heavy and cant utilize
>> 3/4 my cores on 2 systems, so how can one compensates for this
>>
>> is it possible to use xen 4.x on XCP 1.0 ?
>>
>> On Tue, Mar 8, 2011 at 1:42 PM, Todd Deshane <todd.deshane@xxxxxxx> wrote:
>>
>> On Tue, Mar 8, 2011 at 6:32 PM, AP Xen <apxeng@xxxxxxxxx> wrote:
>>> It is called max_phys_cpus=<nr>
>>>
>>> http://xenbits.xensource.com/xen-unstable.hg/rev/d7cbcf5d7cd6
>>>
>>>
>>>
>>> BTW, the default is 128 for Xen 4.x
>>>
>>
>> Just FYI, the plan will be to move to Xen 4.1+ starting with XCP 1.1
>>
>> We do also plan to track xen-unstable with an XCP unstable version as
>> well. More to come on this.
>>
>> Thanks,
>> Todd
>>
>>>
>>>
>>> Thanks,
>>>
>>> AP
>>>
>>>
>>>
>>> From: Tapas Mishra [mailto:mightydreams@xxxxxxxxx]
>>> Sent: Tuesday, March 08, 2011 10:03 AM
>>> To: xen-users
>>> Cc: AP Xen; Boris Quiroz; Outback Dingo
>>>
>>> Subject: Re: [Xen-users] XCP - Maximum CPU cores
>>>
>>>
>>>
>>> Hi please elaborate as how the compilation method of hypervisor can
>>> enhance
>>> the number of CPU's to be pinned.
>>>
>>>
>>>
>>> On Tue, Mar 8, 2011 at 11:24 PM, AP Xen <apxeng@xxxxxxxxx> wrote:
>>>
>>> The default is 32, however you can up the limit to 64 with a compile time
>>> option. So, It depends on how the hypervisor was compiled.
>>>
>>> Thanks,
>>> AP
>>>
>>>> -----Original Message-----
>>>> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
>>>> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Boris Quiroz
>>>> Sent: Tuesday, March 08, 2011 6:04 AM
>>>> To: Outback Dingo
>>>> Cc: xen-users
>>>> Subject: Re: [Xen-users] XCP - Maximum CPU cores
>>>>
>>>> 2011/3/8 Outback Dingo <outbackdingo@xxxxxxxxx>:
>>>> > Whats the maximum cpu cores XCP will see ?
>>>> > _______________________________________________
>>>> > Xen-users mailing list
>>>> > Xen-users@xxxxxxxxxxxxxxxxxxx
>>>> > http://lists.xensource.com/xen-users
>>>> >
>>>>
>>>> Somewhere I read they were 32 cores maximum. I'm checking..
>>>>
>>>> Cheers.
>>>>
>>>> --
>>>> @cereal_bars
>>>>
>>>> _______________________________________________
>>>> Xen-users mailing list
>>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>>> http://lists.xensource.com/xen-users
>>>
>>>
>>> _______________________________________________
>>> Xen-users mailing list
>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-users
>>>
>>>
>>> --
>>> http://mightydreams.blogspot.com
>>>
>>> _______________________________________________
>>> Xen-users mailing list
>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-users
>>>
>>
>>
>> --
>> Todd Deshane
>> http://www.linkedin.com/in/deshantm
>> http://www.xen.org/products/cloudxen.html
>>
>>
>
>
>
> --
> Todd Deshane
> http://www.linkedin.com/in/deshantm
> http://www.xen.org/products/cloudxen.html
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>

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