Messages in this thread | | | Date | Fri, 27 Feb 2015 23:05:45 +0100 | From | Peter Zijlstra <> | Subject | Re: [RFC PATCH 1/1] proc: introduce /proc/<pid>/lbr_stack |
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On Fri, Feb 27, 2015 at 09:54:34AM -0800, Andi Kleen wrote: > > > perf record doesn't show where you're currently blocked. > > > > Of course it does; look at perf inject -s. > > Trace points don't support the LBR stack.
Yes, indeed. But would it not make much more sense to squirrel the LBR state into sched:sched_switch and teach that inject -s thing to dtrt, than to make a proc file that's available on all archs but will only work on 1-2 x86 uarchs and only if you're also running the right magic perf record at the same time?
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