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

Alexey Budankov
2017-06-15T17:42:46Z

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.
>
>
>