Messages in this thread | | | Date | Thu, 21 Feb 2013 11:35:17 +0100 | Subject | Re: [PATCH] perf, x86: add Intel IvyBridge event scheduling constraints | From | Stephane Eranian <> |
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On Wed, Feb 20, 2013 at 11:08 PM, Andi Kleen <ak@linux.intel.com> wrote: >> > Except for LDM_PENDING the CYCLE_ACTIVITY events have been also added to Sandy Bridge. >> > So it should be also added there. >> > >> As far as I know and I double-checked the documentation I have, there >> is no CYCLE_ACTIVITY >> event on SNB or SNB-EP. > > page 19-28 in the Jan 2013 SDM. It was only recently added. > It's only a subset of what you have on Ivy Bridge. > I have confirmed that this is a typo in the SDM. This event is not available on SandyBridge.
>> >> > In fact I think you can still share the table because it would just add some >> > non existent events to Sandy Bridge, which is a noop. >> > >> I don't see the point of this, except saving a few bytes. Isn't it >> better to keep each PMU separate? > > Ok, as long as you update the SNB table too. > > -Andi
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