How to activate all VPCUS for a domU?

How to activate all VPCUS for a domU?

[Omer K.]

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Hi,

I have set maxvcpus and vcpus options in my domU configuration file, and I
can see that X number of vcpu are set for the domU.

I tried to activate all the vpcus by using vpcu_avail option (using decimal
to represent vpcu bitmask e.g. 24=11000) but it doesn't seem to work, and
only the first vpcu is activated (i.e. has -b- state) while all other
vpcu's set for the domU are in the paused state.

Can any one share more insights on how to activate all the vpcu's for the
guest domain ?

Thanks

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Re: How to activate all VPCUS for a domU?

[Mats Petersson]

On 16/11/12 18:09, Omer K. wrote:
> Hi,
>
> I have set maxvcpus and vcpus options in my domU configuration file, 
> and I can see that X number of vcpu are set for the domU.
>
> I tried to activate all the vpcus by using vpcu_avail option (using 
> decimal to represent vpcu bitmask e.g. 24=11000) but it doesn't seem 
> to work, and only the first vpcu is activated (i.e. has -b- state) 
> while all other vpcu's set for the domU are in the paused state.
>
> Can any one share more insights on how to activate all the vpcu's for 
> the guest domain ?
>
> Thanks
This definitely belongs to the Xen-Users list, not on Xen-Devel. Please 
don't post to both lists, it just confuses people.

--
Mats

Re: How to activate all VPCUS for a domU?

[Omer K.]

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Hi,

Apologies for earlier spamming the xen-devel list but this message might be
relevant as I think there is a bug in xm/create.py where 'vcpu_avail'
option doesn't get properly set.

I manage to solve the issue of activating all of the vcpus by apply  a
modified version of the patch earlier discussed:

http://old-list-archives.xen.org/archives/html/xen-users/2010-09/msg00353.html

The following patch fixed the issue for me and after this bitmask value was
activating required vpcu's read from the xen configuration file. Prior to
that, vpcu_avail was always set to '1' (also verified from 'xenstore-ls -f'
output).

--- create.py
+++ create.py.af

         if maxvcpus and vcpus:
             config.append(['vcpus', vcpus])
-            config.append(['vcpu_avail', (1 << vcpus) -1)])
+            config.append(['vcpu_avail', getattr(vals, 'vcpu_avail'])

     def add_conf(n):
         if hasattr(vals, n):

Regards.
Omer


On Fri, Nov 16, 2012 at 6:21 PM, Mats Petersson
<mats.petersson@citrix.com>wrote:

> On 16/11/12 18:09, Omer K. wrote:
>
>> Hi,
>>
>> I have set maxvcpus and vcpus options in my domU configuration file, and
>> I can see that X number of vcpu are set for the domU.
>>
>> I tried to activate all the vpcus by using vpcu_avail option (using
>> decimal to represent vpcu bitmask e.g. 24=11000) but it doesn't seem to
>> work, and only the first vpcu is activated (i.e. has -b- state) while all
>> other vpcu's set for the domU are in the paused state.
>>
>> Can any one share more insights on how to activate all the vpcu's for the
>> guest domain ?
>>
>> Thanks
>>
> This definitely belongs to the Xen-Users list, not on Xen-Devel. Please
> don't post to both lists, it just confuses people.
>
> --
> Mats
>
> ______________________________**_________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
>

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Re: How to activate all VPCUS for a domU?

[Konrad Rzeszutek Wilk]

On Fri, Nov 16, 2012 at 08:19:07PM +0000, Omer K. wrote:
> Hi,
> 
> Apologies for earlier spamming the xen-devel list but this message might be
> relevant as I think there is a bug in xm/create.py where 'vcpu_avail'
> option doesn't get properly set.
> 
> I manage to solve the issue of activating all of the vcpus by apply  a
> modified version of the patch earlier discussed:
> 
> http://old-list-archives.xen.org/archives/html/xen-users/2010-09/msg00353.html
> 
> The following patch fixed the issue for me and after this bitmask value was
> activating required vpcu's read from the xen configuration file. Prior to
> that, vpcu_avail was always set to '1' (also verified from 'xenstore-ls -f'
> output).
> 
> --- create.py
> +++ create.py.af
> 
>          if maxvcpus and vcpus:
>              config.append(['vcpus', vcpus])
> -            config.append(['vcpu_avail', (1 << vcpus) -1)])
> +            config.append(['vcpu_avail', getattr(vals, 'vcpu_avail'])
> 
>      def add_conf(n):
>          if hasattr(vals, n):


Could you want repost this with an Signed-off-By. There is a nice
description here on how to do it:

http://wiki.xen.org/wiki/Submitting_Xen_Patches

> 
> Regards.
> Omer
> 
> 
> On Fri, Nov 16, 2012 at 6:21 PM, Mats Petersson
> <mats.petersson@citrix.com>wrote:
> 
> > On 16/11/12 18:09, Omer K. wrote:
> >
> >> Hi,
> >>
> >> I have set maxvcpus and vcpus options in my domU configuration file, and
> >> I can see that X number of vcpu are set for the domU.
> >>
> >> I tried to activate all the vpcus by using vpcu_avail option (using
> >> decimal to represent vpcu bitmask e.g. 24=11000) but it doesn't seem to
> >> work, and only the first vpcu is activated (i.e. has -b- state) while all
> >> other vpcu's set for the domU are in the paused state.
> >>
> >> Can any one share more insights on how to activate all the vpcu's for the
> >> guest domain ?
> >>
> >> Thanks
> >>
> > This definitely belongs to the Xen-Users list, not on Xen-Devel. Please
> > don't post to both lists, it just confuses people.
> >
> > --
> > Mats
> >
> > ______________________________**_________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
> >

> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel