Messages in this thread | | | Date | Fri, 10 Sep 2010 14:10:03 +0200 | Subject | Re: [PATCH 0/3 v2] nmi perf fixes | From | Stephane Eranian <> |
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On Fri, Sep 10, 2010 at 1:41 PM, Peter Zijlstra <peterz@infradead.org> wrote: > On Thu, 2010-09-02 at 15:07 -0400, Don Zickus wrote: >> Fixes to allow unknown nmis to pass through the perf nmi handler instead >> of being swallowed. Contains patches that are already in Ingo's tree. Added >> here for completeness. Based on ingo/tip >> >> Tested on intel/amd >> >> v2: patch cleanups and consolidation, no code changes >> >> Don Zickus (1): >> perf, x86: Fix accidentally ack'ing a second event on intel perf >> counter >> >> Peter Zijlstra (1): >> perf, x86: Fix handle_irq return values >> >> Robert Richter (1): >> perf, x86: Try to handle unknown nmis with an enabled PMU >> >> arch/x86/kernel/cpu/perf_event.c | 59 +++++++++++++++++++++++++------- >> arch/x86/kernel/cpu/perf_event_intel.c | 15 +++++--- >> arch/x86/kernel/cpu/perf_event_p4.c | 2 +- >> 3 files changed, 56 insertions(+), 20 deletions(-) > > Both Ingo and I are getting Dazed and confused on our AMD machines, it > started before yesterday (that is, after backing out all my recent > changes it still gets dazed), so I suspect this set. > > I'll look at getting a trace of the thing, but if any of you has a > bright idea...
I still don't buy the back-to-back NMI thing. I suspect there is something else going on. I have continued to track it down. I got closer yesterday, until I ran into other issues. It may have to do with throttling. I am still trying to understanding why the OVF_STATUS does not match the check based on the counter values.
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