need help about CPU offline/hotplug in Xen Unstable

need help about CPU offline/hotplug in Xen Unstable

[Ting Shen]

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I've noticed this section in Xen 3.4 News(
http://mail-index.netbsd.org/port-xen/2009/03/02/msg004800.html):

CPU offline/hotplug: Xen 3.4 can offline

physical CPUs on CPU-core granularity.
CPU hotplugging works on CPU granularity.
It's meant as an recover-action for the case
of machine-check errors. This feature
requires Dom0 support to utilize it.
This feature has been almost tested

on Intel-CPUs only.

Then I downloaded the stable version from xen.org and installed.
But since the document is not updated, I don't know the detail method to
offline a physical CPU.


Can anyone give me the hint? Thanks very much!

-- 
Yours Sincerely,
Ting Shen

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Re: need help about CPU offline/hotplug in Xen Unstable

[Keir Fraser]

On 12/05/2009 15:47, "Ting Shen" <christieshum@gmail.com> wrote:

> Then I downloaded the stable version from xen.org <http://xen.org>  and
> installed.
> But since the document is not updated, I don't know the detail method to
> offline a physical CPU.

It's available as a library function (xc_cpu_offline) but not actually
plumbed into a xm command, or other tool.

 -- Keir

RE: need help about CPU offline/hotplug in Xen Unstable

[Jiang, Yunhong]

We have a tools to achieve that (i.e. xm command). But as Xen tree is closed now, so we are waiting for it be open again and will send it out.

--jyh

xen-devel-bounces@lists.xensource.com wrote:
> On 12/05/2009 15:47, "Ting Shen" <christieshum@gmail.com> wrote:
> 
>> Then I downloaded the stable version from xen.org <http://xen.org> 
>> and installed. But since the document is not updated, I don't know
>> the detail method to offline a physical CPU.
> 
> It's available as a library function (xc_cpu_offline) but not actually
> plumbed into a xm command, or other tool.
> 
> -- Keir
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

Re: Re: need help about CPU offline/hotplug in Xen Unstable

[ChristieShum]

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Thanks a lot.
Is there a sample or tutorial for how to implement the offline process  
using this library?

On May 12, 2009 11:02pm, Keir Fraser <keir.fraser@eu.citrix.com> wrote:
> On 12/05/2009 15:47, "Ting Shen" christieshum@gmail.com> wrote:



> > Then I downloaded the stable version from xen.org http://xen.org> and

> > installed.

> > But since the document is not updated, I don't know the detail method to

> > offline a physical CPU.



> It's available as a library function (xc_cpu_offline) but not actually

> plumbed into a xm command, or other tool.



> -- Keir






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RE: Re: need help about CPU offline/hotplug in Xen Unstable

[Ke, Liping]

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please try below test code piece. Hope it could help you.

Thanks& Regards,
Criping

#include <stdio.h>
#include <stdlib.h>

#include <xenctrl.h>

int main(int argc, char *argv[] )
{
    int cpu, xc_id;
    if ( argc < 2) {
        printf("Please input offline CPU-id\n");
        exit(0);
    }
    cpu = atoi(argv[1]);
    printf("Offline CPU %d\n", cpu);
    xc_id = xc_interface_open();
    xc_cpu_offline(xc_id, cpu);
    printf("CPU offlined\n");
    xc_interface_close(xc_id);
    return 0;
}

________________________________
From: xen-devel-bounces@lists.xensource.com [mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of ChristieShum@gmail.com
Sent: 2009年5月13日 12:30
To: Xen-devel
Subject: Re: Re: [Xen-devel] need help about CPU offline/hotplug in Xen Unstable

Thanks a lot.
Is there a sample or tutorial for how to implement the offline process using this library?

On May 12, 2009 11:02pm, Keir Fraser <keir.fraser@eu.citrix.com> wrote:
> On 12/05/2009 15:47, "Ting Shen" christieshum@gmail.com> wrote:
>
>
>
> > Then I downloaded the stable version from xen.org http://xen.org>  and
>
> > installed.
>
> > But since the document is not updated, I don't know the detail method to
>
> > offline a physical CPU.
>
>
>
> It's available as a library function (xc_cpu_offline) but not actually
>
> plumbed into a xm command, or other tool.
>
>
>
>  -- Keir
>
>
>
>
>

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Re: Re: need help about CPU offline/hotplug in Xen Unstable

[Ting Shen]

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Yes, It works well. Thank you very much indeed!

2009/5/13 Ke, Liping <liping.ke@intel.com>

>  please try below test code piece. Hope it could help you.
>
> Thanks& Regards,
> Criping
>
> #include <stdio.h>
> #include <stdlib.h>
>
> #include <xenctrl.h>
>
> int main(int argc, char *argv[] )
> {
>     int cpu, xc_id;
>     if ( argc < 2) {
>         printf("Please input offline CPU-id\n");
>         exit(0);
>     }
>     cpu = atoi(argv[1]);
>     printf("Offline CPU %d\n", cpu);
>     xc_id = xc_interface_open();
>     xc_cpu_offline(xc_id, cpu);
>     printf("CPU offlined\n");
>     xc_interface_close(xc_id);
>     return 0;
> }
>
>  ------------------------------
> *From:* xen-devel-bounces@lists.xensource.com [mailto:
> xen-devel-bounces@lists.xensource.com] *On Behalf Of *
> ChristieShum@gmail.com
> *Sent:* 2009年5月13日 12:30
> *To:* Xen-devel
> *Subject:* Re: Re: [Xen-devel] need help about CPU offline/hotplug in Xen
> Unstable
>
> Thanks a lot.
> Is there a sample or tutorial for how to implement the offline process
> using this library?
>
> On May 12, 2009 11:02pm, Keir Fraser <keir.fraser@eu.citrix.com> wrote:
> > On 12/05/2009 15:47, "Ting Shen" christieshum@gmail.com> wrote:
> >
> >
> >
> > > Then I downloaded the stable version from xen.org http://xen.org>  and
> >
> > > installed.
> >
> > > But since the document is not updated, I don't know the detail method
> to
> >
> > > offline a physical CPU.
> >
> >
> >
> > It's available as a library function (xc_cpu_offline) but not actually
> >
> > plumbed into a xm command, or other tool.
> >
> >
> >
> >  -- Keir
> >
> >
> >
> >
> >
>



-- 
Yours Sincerely,
Ting Shen

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need help about CPU offline/hotplug in Xen Unstable

[沈霆]

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I've noticed this section in Xen 3.4 News(
http://mail-index.netbsd.org/port-xen/2009/03/02/msg004800.html):

CPU offline/hotplug: Xen 3.4 can offline
physical CPUs on CPU-core granularity.
CPU hotplugging works on CPU granularity.
It's meant as an recover-action for the case
of machine-check errors. This feature
requires Dom0 support to utilize it.
This feature has been almost tested
on Intel-CPUs only.

Then I downloaded the stable version from xen.org and installed.
But since the document is not updated, I don't know the detail method
to offline a physical CPU.

Can anyone give me the hint? Thanks very much!

-- 
Yours Sincerely,
Ting Shen

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