[PATCH 0/2] xenoprofile: Add IBS support

[PATCH 0/2] xenoprofile: Add IBS support

[Wei Wang2]

Hi,
This patch set adds IBS support for AMD family 10h processors. The major 
implementation is derived from latest Linux. Two hypercalls are added, which 
is necessary for IBS feature detection and user mode parameter read. 
Thanks,
-Wei

Signed-off-by: Wei Wang <wei.wang2@amd.com>
-- 
AMD GmbH, Germany
Operating System Research Center

Legal Information:
Advanced Micro Devices GmbH
Karl-Hammerschmidt-Str. 34
85609 Dornach b. München

Geschäftsführer: Andrew Bowd, Thomas M. McCoy, Giuliano Meroni
Sitz: Dornach, Gemeinde Aschheim, Landkreis München
Registergericht München, HRB Nr. 43632

Re: [PATCH 0/2] xenoprofile: Add IBS support

[George Dunlap]

May I ask a (potentially) dumb question: what is IBS?
 -George

On Fri, Jul 30, 2010 at 2:28 PM, Wei Wang2 <wei.wang2@amd.com> wrote:
> Hi,
> This patch set adds IBS support for AMD family 10h processors. The major
> implementation is derived from latest Linux. Two hypercalls are added, which
> is necessary for IBS feature detection and user mode parameter read.
> Thanks,
> -Wei
>
> Signed-off-by: Wei Wang <wei.wang2@amd.com>
> --
> AMD GmbH, Germany
> Operating System Research Center
>
> Legal Information:
> Advanced Micro Devices GmbH
> Karl-Hammerschmidt-Str. 34
> 85609 Dornach b. München
>
> Geschäftsführer: Andrew Bowd, Thomas M. McCoy, Giuliano Meroni
> Sitz: Dornach, Gemeinde Aschheim, Landkreis München
> Registergericht München, HRB Nr. 43632
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>

Re: [PATCH 0/2] xenoprofile: Add IBS support

[Wei Wang2]

Hi George,
IBS is Instruction-Based Sampling which is a new profiling technique 
introduced by AMD Family 10 processor that can provide rich, precise 
performance information. You can read more details about this from the white 
paper http://developer.amd.com/assets/amd_ibs_paper_en.pdf 

IBS feature is also well documented on Software Optimization Guide for AMD 
Family 10h Processors 
http://support.amd.com/us/Processor_TechDocs/40546-PUB-Optguide_3-11_5-21-09.pdf

Thanks,
Wei

On Friday 06 August 2010 16:13:15 George Dunlap wrote:
> May I ask a (potentially) dumb question: what is IBS?
>  -George
>
> On Fri, Jul 30, 2010 at 2:28 PM, Wei Wang2 <wei.wang2@amd.com> wrote:
> > Hi,
> > This patch set adds IBS support for AMD family 10h processors. The major
> > implementation is derived from latest Linux. Two hypercalls are added,
> > which is necessary for IBS feature detection and user mode parameter
> > read. Thanks,
> > -Wei
> >
> > Signed-off-by: Wei Wang <wei.wang2@amd.com>
> > --
> > AMD GmbH, Germany
> > Operating System Research Center
> >
> > Legal Information:
> > Advanced Micro Devices GmbH
> > Karl-Hammerschmidt-Str. 34
> > 85609 Dornach b. München
> >
> > Geschäftsführer: Andrew Bowd, Thomas M. McCoy, Giuliano Meroni
> > Sitz: Dornach, Gemeinde Aschheim, Landkreis München
> > Registergericht München, HRB Nr. 43632
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel

Re: [PATCH 0/2] xenoprofile: Add IBS support

[Keir Fraser]

On 06/08/2010 15:34, "Wei Wang2" <wei.wang2@amd.com> wrote:

> Hi George,
> IBS is Instruction-Based Sampling which is a new profiling technique
> introduced by AMD Family 10 processor that can provide rich, precise
> performance information. You can read more details about this from the white
> paper http://developer.amd.com/assets/amd_ibs_paper_en.pdf
> 
> IBS feature is also well documented on Software Optimization Guide for AMD
> Family 10h Processors
> http://support.amd.com/us/Processor_TechDocs/40546-PUB-Optguide_3-11_5-21-09.p
> df

Yeah it's a lot like the old Alpha ProfileMe tagged instruction profiling.
In fact I wouldn't be surprised if some of the same engineers are involved,
since a bunch of them ended up at AMD. I'm not sure what oprofile can do
with all that lovely rich information -- a big part of the profiling setup
on Alpha was the associated always-on DCPI software and its integration into
the toolchain. If something like that is developed in open source for
x86/AMD it would be super cool!

 -- Keir

> Thanks,
> Wei
> 
> On Friday 06 August 2010 16:13:15 George Dunlap wrote:
>> May I ask a (potentially) dumb question: what is IBS?
>>  -George
>> 
>> On Fri, Jul 30, 2010 at 2:28 PM, Wei Wang2 <wei.wang2@amd.com> wrote:
>>> Hi,
>>> This patch set adds IBS support for AMD family 10h processors. The major
>>> implementation is derived from latest Linux. Two hypercalls are added,
>>> which is necessary for IBS feature detection and user mode parameter
>>> read. Thanks,
>>> -Wei
>>> 
>>> Signed-off-by: Wei Wang <wei.wang2@amd.com>
>>> --
>>> AMD GmbH, Germany
>>> Operating System Research Center
>>> 
>>> Legal Information:
>>> Advanced Micro Devices GmbH
>>> Karl-Hammerschmidt-Str. 34
>>> 85609 Dornach b. München
>>> 
>>> Geschäftsführer: Andrew Bowd, Thomas M. McCoy, Giuliano Meroni
>>> Sitz: Dornach, Gemeinde Aschheim, Landkreis München
>>> Registergericht München, HRB Nr. 43632
>>> 
>>> 
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@lists.xensource.com
>>> http://lists.xensource.com/xen-devel
> 
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel