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Re: [PATCH v2]: perf/core: addressing 4x slowdown during per-process, profiling of STREAM benchmark on Intel Xeon Phi

Started byAlexey Budankov <alexey.budankov@linux.intel.com>
First post2017-06-15 19:50 +0200
Last post2017-06-15 19:50 +0200
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  Re: [PATCH v2]: 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

#1666931 — Re: [PATCH v2]: perf/core: addressing 4x slowdown during per-process, profiling of STREAM benchmark on Intel Xeon Phi

FromAlexey Budankov <alexey.budankov@linux.intel.com>
Date2017-06-15 19:50 +0200
SubjectRe: [PATCH v2]: perf/core: addressing 4x slowdown during per-process, profiling of STREAM benchmark on Intel Xeon Phi
Message-ID<tSH45-5q5-7@gated-at.bofh.it>
On 29.05.2017 14:45, Alexey Budankov wrote:
> On 29.05.2017 14:23, Peter Zijlstra wrote:
>> On Mon, May 29, 2017 at 01:56:05PM +0300, Alexey Budankov wrote:
>>> On 29.05.2017 13:43, Peter Zijlstra wrote:
>>
>>>> Why can't the tree do both?
>>>>
>>>
>>> Well, indeed, the tree provides such capability too. However 
>>> switching to
>>> the full tree iteration in cases where we now go through _groups 
>>> lists will
>>> enlarge the patch, what is probably is not a big deal. Do you think 
>>> it is
>>> worth implementing the switch?
>>
>> Do it as a series of patches, where patch 1 introduces the tree, patches
>> 2 through n convert the list users into tree users, and patch n+1
>> removes the list.
> 
> Well ok, let's do that additionally but please expect delay in delivery 
> (I am OOO till Jun 14).

addressed in v3.

> 
>>
>> I think its good to not have duplicate data structures if we can avoid
>> it.
>>
> 
> yeah, makes sense.
> 
> 
> 

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