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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 Alexey Budankov <alexey.budankov@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 2017-06-30 12:30 +0200
Message-ID <tY1lw-4fP-21@gated-at.bofh.it> (permalink)
References (4 earlier) <tU4UG-3bd-21@gated-at.bofh.it> <tU54m-3eS-17@gated-at.bofh.it> <tU6tr-4hT-9@gated-at.bofh.it> <tU6MP-4pB-47@gated-at.bofh.it> <tU6Wv-4tx-53@gated-at.bofh.it>
Organization Intel Corp.

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On 19.06.2017 18:34, Alexey Budankov wrote:
> On 19.06.2017 18:24, Andi Kleen wrote:
>>> 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)
> 
> Ok. Will try. Thanks.

Tested patch v5 with KASAN enabled. No memory corruptions were revealed so far. 

> 
>>
>> -Andi
>>
>>
> 
> 

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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 Alexey Budankov <alexey.budankov@linux.intel.com> - 2017-06-30 12:30 +0200

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