On Sat, Oct 24, 2009 at 6:35 PM, Nicolas Sylvain <nsylv...@chromium.org>wrote:

>
>
> On Fri, Oct 23, 2009 at 2:16 PM, Andrew Scherkus <scher...@chromium.org>wrote:
>
>> On Fri, Oct 23, 2009 at 12:28 PM, Nicolas Sylvain 
>> <nsylv...@chromium.org>wrote:
>>
>>>
>>>
>>> On Fri, Oct 23, 2009 at 12:21 PM, Andrew Scherkus <scher...@chromium.org
>>> > wrote:
>>>
>>>> I've never witnessed these tests taking an extra 10-20 seconds on my
>>>> local machine, no.
>>>>
>>>> I don't doubt that some of the tests might be flaky themselves, but that
>>>> machine does run tests slower.  Take a look at the SVG tests, for example:
>>>>
>>>> http://src.chromium.org/viewvc/chrome/trunk/src/webkit/tools/layout_tests/flakiness_dashboard.html#tests=LayoutTests%2Fsvg
>>>>
>>>> Are there other tricks I do on my local machine to simulate running on
>>>> the bots?  I usually try to test for these things by maxing out my CPU then
>>>> running layout tests but even then they run smoothly.
>>>>
>>>
>>> This machine is one of the oldest linux machine we have in the lab. I'll
>>> recreate it, make sure it run fast, and see if it helps.
>>>
>>
>> Thanks Nicolas.
>>
>
> I changed the machine, and so far so good. The time to run the layout tests
> on this machine went from 11minutes to 5 minutes. Looks like
> something was wrong on the machine after all.  There are still some
> flakiness... but at least they are not TIMEOUT.
>
> Thanks
>
> Nicolas
>

Looks like the ball is back in my court to fix the tests now :P

Thanks for investigating!
Andrew


>
>
>>
>> I'm wondering if it's slow disk access... know of any simple commands I
>> can use to simulate disk thrashing?
>>
>>
>>>
>>> Nicolas
>>>
>>>
>>>> Andrew
>>>>
>>>> On Fri, Oct 23, 2009 at 12:02 PM, Nicolas Sylvain <
>>>> nsylv...@chromium.org> wrote:
>>>>
>>>>>
>>>>>
>>>>> On Fri, Oct 23, 2009 at 11:59 AM, Andrew Scherkus <
>>>>> scher...@chromium.org> wrote:
>>>>>
>>>>>> I've been trying to get the media layout tests passing consistently,
>>>>>> but WebKit Linux (dbg)(3) takes an absurdly longer time to run tests and 
>>>>>> I
>>>>>> don't know why.
>>>>>>
>>>>>> For example:
>>>>>>
>>>>>> http://src.chromium.org/viewvc/chrome/trunk/src/webkit/tools/layout_tests/flakiness_dashboard.html#tests=video-played
>>>>>>
>>>>>> To keep the tree green (and collect data), I've marked all media
>>>>>> layout tests on Linux debug as pass/fail/timeout.  My hope is if the bot 
>>>>>> was
>>>>>> less bogged down, it would lead to faster build times (GTTF) and less 
>>>>>> flaky
>>>>>> results/timeouts (LTTF).
>>>>>>
>>>>>> This machine is supposed to be fast.
>>>>>
>>>>> Are you saying that this flakiness never happens on your machine?
>>>>>
>>>>> Are you sure the bot is really to blame here?
>>>>>
>>>>> Nicolas
>>>>>
>>>>> Any ideas?
>>>>>> Andrew
>>>>>>
>>>>>>
>>>>>> >>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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