Messages in this thread | | | Date | Tue, 23 Jul 2013 18:57:39 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] perf, x86: Enable PEBS mode automatically for mem-{loads,stores} v3 |
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On Tue, Jul 23, 2013 at 06:13:34PM +0200, Andi Kleen wrote: > On Tue, Jul 23, 2013 at 10:38:34AM +0200, Peter Zijlstra wrote: > > On Thu, Jul 18, 2013 at 04:03:39PM -0700, Andi Kleen wrote: > > > From: Andi Kleen <ak@linux.intel.com> > > > > > > [The patch to enable this in the user tools has been sent separately] > > > > > > With the earlier patches to automatically try cpu// and add > > > a precise sys attribute, we can now enable PEBS for the mem-loads, > > > mem-stores events everywhere. > > > > > > This allows to use > > > > > > perf record -e mem-loads ... > > > > > > instead of > > > > > > perf record -e cpu/mem-loads/p ... > > > > > > Always use precise=2 even though it is costly pre-Haswell > > > > This Changelog fails to give a reason _why_ we'd want to do this. > > The first is much nicer to type and understand? Just in the spirit of > making perf easier to use.
And here I was thinking that maybe these events don't make sense without pebs or so. But no, rather than giving an actual useful reason you'd have me look things up myself. *sigh*
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