Messages in this thread | | | Date | Mon, 29 Oct 2012 11:13:23 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH 01/33] perf, x86: Add PEBSv2 record support |
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On Mon, Oct 29, 2012 at 07:08:04PM +0900, Namhyung Kim wrote: > Hi Andi, > > On Fri, 26 Oct 2012 13:29:43 -0700, Andi Kleen wrote: > > From: Andi Kleen <ak@linux.intel.com> > > > > Add support for the v2 PEBS format. It has a superset of the v1 PEBS > > fields, but has a longer record so we need to adjust the code paths. > > > > The main advantage is the new "EventingRip" support which directly > > gives the instruction, not off-by-one instruction. So with precise == 2 > > we use that directly and don't try to use LBRs and walking basic blocks. > > This lowers the overhead significantly. > > That means it can support precise == 3?
No. It's still 2
I tried to introduced precise == 3 some time ago for PDIR, but it was rejected.
-Andi
-- ak@linux.intel.com -- Speaking for myself only.
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