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
George Dunlap
2010-Aug-06 14:13 UTC
Re: [Xen-devel] [PATCH 0/2] xenoprofile: Add IBS support
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
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_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Keir Fraser
2010-Aug-06 14:59 UTC
Re: [Xen-devel] [PATCH 0/2] xenoprofile: Add IBS support
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 > dfYeah 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_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel