[pypy-dev] recent speed results

Maciej Fijalkowski fijall at gmail.com
Thu May 6 23:51:59 CEST 2010


I looked at svn log, and the only coincidence I can find is upgrade of ubuntu.

On Thu, May 6, 2010 at 7:51 AM,  <exarkun at twistedmatrix.com> wrote:
> On 11:05 am, arigo at tunes.org wrote:
>>
>> Hi,
>>
>> On Tue, May 04, 2010 at 07:59:17PM -0600, Maciej Fijalkowski wrote:
>>>
>>> Anyone has any clue where recent noise comes from? I could not
>>> pinpoint any single revision.
>>
>> That really looks like some external factor, e.g. the machine is
>> overloaded.  Maybe we should move benchmarking to tannit.  It would mean
>> that the results cannot be followed across the move, but at least tannit
>> is a non-virtual machine on which we can ensure some consistent total
>> usage.
>>
>> The drawback of picking tannit is that it's unclear what will occur to
>> it after the end of the current funding period.  Other choices have
>> other drawbacks -- e.g. wyvern is old (and not representative of today's
>> performance) and might die unexpectedly any year now.
>
> What else is on the machine that's causing it to be overloaded now?
>
> I'd suggest temporarily disabling or moving all of that first, getting a few
> benchmark runs that show there hasn't been a performance regression, and
> then considering moving the benchmarks to a new machine.  Otherwise if there
> has been a performance regression, the move will just hide it.
>
> Jean-Paul
>



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