[Vm-dev] [Pharo-project] jenkins cog - slow monticello on osx

[Igor Stasenko]

On 22 September 2011 19:32, Tudor Girba <tudor at tudorgirba.com> wrote:
>
> Hi,
>
> I looked a bit into the slowness of the OS X Jenkins Cog VM with Monticello. The problem exists and it is reproducible.
>
> I performed the following experiments using the following script:
>
> Time millisecondsToRun:
>                [ 1 to: 100 do: [:x |
>                        | window |
>                        window := MCWorkingCopyBrowser new show.
>                        window delete ] ]
>
> I ran it on the same image using the following vms (on Mac OS X Lion):
> - Jenkins VM from 31.08.2011
> - Cog VM r2489
>
> I ran the scenario twice with two different setups:
>
> 1. I placed the image in an empty folder:
>
> Cog VM 2389: 4808 ms
> Jenkins VM: 7345 ms
>
> 2. I places the image in a folder that already had a large package-cache with 7400 mcz files:
> Cog VM: 4867 ms
> Jenkins VM:      50754 ms
>
>
> So:
> - even if there is no package cache, the Jenkins VM seems to perform 1.5 times slower
> - when there is a package-cache, it becomes hardly unusable.
>
Thanks, Tudor for sticking with it :)

so, your measurements telling that its actually could be related more
to filesystem interaction(s)
rather than to network.

we need to ask an experts (Esteban and John) , what are difference
between cocoa and carbon versions
in file handling, that may cause such big slowdown.



> Cheers,
> Doru
>
>
> On 8 Sep 2011, at 12:10, Tudor Girba wrote:
>
>> Hi,
>>
>> I did not forget about this, but I did not have enough time yet.
>>
>> Cheers,
>> Doru
>>
>>
>> On 26 Aug 2011, at 14:40, Igor Stasenko wrote:
>>
>>>
>>> On 26 August 2011 13:30, Tudor Girba <tudor at tudorgirba.com> wrote:
>>>> Hi,
>>>>
>>>> Since a couple of weeks I am working with the Cog VM built on Jenkins:
>>>> https://ci.lille.inria.fr/pharo/view/Cog/job/Cog-Mac-Cocoa/
>>>>
>>>> Here is a little feedback. It worked quite well, the only problem is that Monticello is really slow in the Moose image. This means that even opening the Monticello Browser takes several seconds.
>>>>
>>>> I thought that this might be induced by something in the Moose image, but if I try with the Elliot's VM (2489), it works blazingly fast.
>>>>
>>>
>>> Thanks for the  information, Tudor.
>>> Apparently the difference between Eliot's VM and Cog-Mac-Cocoa that
>>> they are using different frameworks
>>> (Carbon vs Cocoa)
>>> and i don't know too much details about the difference there.
>>> John or Esteban may have better insights how to fix that.
>>>
>>>> Cheers,
>>>> Doru
>>>>
>>>>
>>>> --
>>>> www.tudorgirba.com
>>>>
>>>> "The coherence of a trip is given by the clearness of the goal."
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Best regards,
>>> Igor Stasenko AKA sig.
>>
>> --
>> www.tudorgirba.com
>>
>> "Yesterday is a fact.
>> Tomorrow is a possibility.
>> Today is a challenge."
>>
>>
>>
>
> --
> www.tudorgirba.com
>
> "Sometimes the best solution is not the best solution."
>
>



-- 
Best regards,
Igor Stasenko.