Messages in this thread | | | Date | Tue, 8 Dec 2015 14:27:53 +0100 | From | Peter Zijlstra <> | Subject | Re: [tip:perf/core] perf/x86: Use INST_RETIRED.PREC_DIST for cycles: ppp |
| |
On Tue, Dec 08, 2015 at 09:57:07AM +0100, Peter Zijlstra wrote: > On Tue, Dec 08, 2015 at 09:50:26AM +0100, Peter Zijlstra wrote: > > On Tue, Dec 08, 2015 at 06:36:04AM +0100, Ingo Molnar wrote: > > > > > So I checked my NHM box with your latest queue and it now works correctly. Do you > > > have any idea what the difference is/was? > > > > Sadly, no clue :/ > > > > I went over those patches and cannot find anything that should affect > > NHM (or <=SNB in fact). > > Oh wait, I spoke too soon, the two new patches affect everything with > PEBS. And esp. the latter one: > > lkml.kernel.org/r/1449177740-5422-2-git-send-email-andi@firstfloor.org >
If that is the patch that makes your NHM go again, then running 2 concurrent perf-top sessions should make it all go dark again.
| |