Open Stack

Hi Roman,

Yes eventlet works well on PyPy, both Marconi and Swift use it.

Alex


On Mon, Sep 9, 2013 at 10:15 PM, Roman Podolyaka <rpodolyaka at mirantis.com>wrote:

> Hi Alex,
>
> That's really cool! I believe, performance is not the only benefit we can
> get from running OpenStack projects on PyPy. We  can also improve the
> overall "correctness" of our code (as PyPy behaves differently with
> non-closed files, etc), just like compiling of your C/C++ app using
> different compilers can show hidden errors.
>
> And what about eventlet? Does it work well on PyPy? (as it is used in
> Nova, Neutron, etc)
>
> Thanks,
> Roman
>
>
> On Tue, Sep 10, 2013 at 12:28 AM, Alex Gaynor <alex.gaynor at gmail.com>wrote:
>
>> Hi all,
>>
>> Many of you have probably seen me send review requests in the last few
>> weeks
>> about adding PyPy support to various OpenStack projects. A few people were
>> confused by these, so I wanted to fill everyone in on what I'm up to :)
>>
>> First, for those who aren't familiar with what PyPy is: PyPy is an
>> implementation of the Python language which includes a high performance
>> tracing
>> just-in-time compiler and which is faster than CPython (the reference,
>> and most
>> widely deployed, implementation) on almost all workloads.
>>
>> The current status is:
>>
>> Two major projects work, both Marconi and Swift, Marconi is gating
>> against PyPy
>> already, Swift isn't yet since I needed to fix a few small PyPy bugs and
>> those
>> aren't in a release yet, expect it soon :)
>>
>> In terms of results, I've observed 30% performance improvements on GET
>> workloads for Swift under PyPy vs. CPython (other workloads haven't been
>> benchmarked tet). I believe the Marconi folks have also observed some
>> performance wins, but I'll let them speak to that, I don't have the full
>> details.
>>
>> Many python-clients projects are also working out of the box and gating:
>> including novaclient, swiftclient, marconiclient, ceilometerclient,
>> heatclient,
>> and ironicclient!
>>
>> There's a few outstanding reviews to add PyPy gating for cinderclient,
>> troveclient, and glanceclient.
>>
>> In terms of future direction:
>>
>> I'm going to continue to work on getting more projects running and gating
>> against PyPy.
>>
>> Right now I'm focusing a lot of my attention on improving Swift
>> performance,
>> particularly under PyPy, but also under CPython.
>>
>> I'm hoping some day PyPy will be the default way to deploy OpenStack!
>>
>>
>> If you're interested in getting your project running on PyPy, or looking
>> at
>> performance under it, please let me know, I'm always interested in
>> helping!
>>
>> Thanks,
>> Alex
>>
>> --
>> "I disapprove of what you say, but I will defend to the death your right
>> to say it." -- Evelyn Beatrice Hall (summarizing Voltaire)
>> "The people's good is the highest law." -- Cicero
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>>
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>
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-- 
"I disapprove of what you say, but I will defend to the death your right to
say it." -- Evelyn Beatrice Hall (summarizing Voltaire)
"The people's good is the highest law." -- Cicero
GPG Key fingerprint: 125F 5C67 DFE9 4084
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