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Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during per-process profiling of STREAM benchmark on Intel Xeon Phi

From Andi Kleen <ak@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during per-process profiling of STREAM benchmark on Intel Xeon Phi
Date 2017-06-19 17:30 +0200
Message-ID <tU6MP-4pB-47@gated-at.bofh.it> (permalink)
References (2 earlier) <tSLhn-8i0-3@gated-at.bofh.it> <tU4Bk-33y-13@gated-at.bofh.it> <tU4UG-3bd-21@gated-at.bofh.it> <tU54m-3eS-17@gated-at.bofh.it> <tU6tr-4hT-9@gated-at.bofh.it>
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> One more:

It may help if you run with KASAN enabled. That often
finds problems earlier. 

Also could use ftrace and use ftrace_dump_on_oops to 
see the sequence (but that has a lot of overhead
and sometimes hides problems)

-Andi

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[PATCH v3 1/n] perf/core: addressing 4x slowdown during per-process  profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-15 19:50 +0200
  Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-15 22:00 +0200
    Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-16 00:20 +0200
      Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-16 11:20 +0200
        Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-16 16:10 +0200
          Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-16 16:30 +0200
            Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-19 14:50 +0200
              Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-19 15:40 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-19 16:10 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Andi Kleen <ak@linux.intel.com> - 2017-06-19 17:00 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-19 17:20 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Andi Kleen <ak@linux.intel.com> - 2017-06-19 17:30 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-19 17:30 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Andi Kleen <ak@linux.intel.com> - 2017-06-19 17:50 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-19 18:00 +0200
      Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-19 15:10 +0200
        Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-19 15:30 +0200
          Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-19 15:40 +0200
            Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-19 17:10 +0200
              Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Andi Kleen <ak@linux.intel.com> - 2017-06-19 17:30 +0200
                Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-19 17:40 +0200
            Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Mark Rutland <mark.rutland@arm.com> - 2017-06-19 17:20 +0200
              Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-19 17:30 +0200
    Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during  per-process profiling of STREAM benchmark on Intel Xeon Phi Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-19 22:40 +0200

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