Messages in this thread | | | Date | Wed, 15 Feb 2017 11:13:23 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH v9 0/8] perf/amd/iommu: Enable multi-IOMMU support |
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On Tue, Feb 07, 2017 at 02:40:28AM -0600, Suravee Suthikulpanit wrote: > From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> > > This patch series modifies the existing IOMMU and Perf drivers to support > systems with multiple IOMMUs by allocating an amd_iommu PMU per IOMMU instance. > This allows users to specify performance events and filters separately for each > IOMMU. > > This has been tested on the new family17h-based server w/ multiple IOMMUs.
Ok, so far so good.
There's just one thing:
$ perf stat -e amd_iommu_X/Y
says <not supported> and only doing the system wide tracing with -a does it count events.
So, lemme ask perf tool people, can we guys make the -a thing default when detect that we're running only uncore events which all should need -a anyway?
Otherwise people who, like me, don't know that, would try to do measurements and see the <not supported> and wonder...
Lemme add some more people to CC.
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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