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Subject: Re: [PATCH v3 1/n] perf/core: addressing 4x slowdown during
 per-process profiling of STREAM benchmark on Intel Xeon Phi
To: Andi Kleen <ak@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
        Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Kan Liang <kan.liang@intel.com>,
        Dmitri Prokhorov <Dmitry.Prohorov@intel.com>,
        Valery Cherepennikov <valery.cherepennikov@intel.com>,
        David Carrillo-Cisneros <davidcc@google.com>,
        Stephane Eranian <eranian@google.com>, linux-kernel@vger.kernel.org
References: <09226446-39b9-9bd2-d60f-b9bb947987c5@linux.intel.com>
 <20170615195618.GA8807@leverpostej>
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 <f3890c43-c737-4d0a-4687-c1a5adb0e542@linux.intel.com>
 <099fbd8a-9b62-faee-7eb6-07c2f94adcaa@linux.intel.com>
 <20170619152410.GC23705@tassilo.jf.intel.com>
From: Alexey Budankov <alexey.budankov@linux.intel.com>
Organization: Intel Corp.
Message-ID: <023e19bb-ecf3-c939-3337-391568c567ff@linux.intel.com>
Date: Mon, 19 Jun 2017 18:34:50 +0300
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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.

> 
> -Andi
> 
>