[PATCH] [Lit] Use multiprocessing instead of threading

[Daniel Dunbar]

I assume you are referring to batching of commits. I already take a fair
amount of care when I push to try and separate things out and commit chunks
that are related.

 - Daniel


On Wed, Aug 28, 2013 at 6:09 PM, Chandler Carruth <chandlerc at gmail.com>wrote:

> On Wed, Aug 28, 2013 at 6:00 PM, Daniel Dunbar <daniel at zuster.org> wrote:
>
>>
>>   Hi Takumi,
>>
>>   I just pushed an implementation of multiprocessing in lit, currently
>>   available under the --use-processes command line flag.
>>
>
> Orthogonal to the specific feature, could you try to commit more
> incrementally? Pushing a large set of changes is really hard to review, and
> in other cases negatively impacts our build bot infrastructure. Also, it
> can avoid folks duplicating effort because they aren't aware that you're
> working on something in the background.
>
>
>>
>>   If you have a moment, could you rerun your previous timings (or
>> similar) to
>>   confirm that the version I pushed shows the same improvements you
>>   originally reported?
>>
>>   Also, I haven't yet tested this feature on Windows, so I would love to
>> hear
>>   if it works and what the performance impact is. Fundamentally it has the
>>   same pickling issues as before so if you previously found that to be a
>>   bottleneck then it may continue to be a problem.
>>
>>    - Daniel
>>
>> http://llvm-reviews.chandlerc.com/D134
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>
>
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