[webkit-dev] Anyone else having these problems with run-webkit-tests?

[Dirk Pranke]

On Mon, Mar 24, 2014 at 3:32 PM, Bem Jones-Bey <bjonesbe at adobe.com> wrote:

>
>  On Mar 24, 2014, at 14:54 , Dirk Pranke <dpranke at chromium.org> wrote:
>
>
>
>
> On Sun, Mar 23, 2014 at 12:52 PM, Benjamin Poulain <benjamin at webkit.org>wrote:
>
>> Same here :(
>>
>>
>> On 3/23/14, 12:15 PM, Darin Adler wrote:
>>
>>> When I use run-webkit-tests to run the entire test suite, on a debug
>>> build of TOT WebKit, on Mavericks, I’m having the following problems:
>>>
>>> - Towards the end of the run, the tests run slowly, over a second per
>>> test on my 3.5GHz i7 iMac with tons of memory, which is about 10X too slow
>>> I think. The sample shows the vast majority of the time is spent in
>>> JavaScript garbage collection. This is running mostly the svg/custom tests.
>>>
>>  Yep. The time from 31k to 33k is a long as from 0 to 31k :(
>>
>>  - Towards the end of the run, instead of the 8 parallel copies of
>>> DumpRenderTree, only 1 copy of DumpRenderTree seems to run. This is running
>>> mostly the svg/custom tests.
>>>
>>  I think the problem is we can only run DumpRenderTree in parallel on
>> different folders. Toward the end, everything left is one or two slow
>> folders.
>>
>>
>  The problem is partially that the sharding is folder-at-a-time,
> partially that the svg folder is big and slow, and partially that "svg"
> comes near the end of the alphabet (i.e., we don't start the big slow
> directory until close to the end of run, so there ends up being one big
> long pole).
>
>  At some point we added code to run-webkit-tests to have a list of "slow"
> directories that got started towards the beginning. I don't remember if we
> did that before or after the Blink fork, but it would be easy to port it
> over from Blink if it was after.
>
>
>  I'm pretty sure this was after the Blink fork. I did a quick look
> through the history, and I found this:
>
>  http://src.chromium.org/viewvc/blink?revision=152697&view=revision
>
>  Is that the correct change? If it will make tests run faster in WebKit
> land as well, I'm more than happy to port it myself. :-)
>
>
Yup, that's the one. Obviously the whole "virtual test suite" thing is less
relevant, but you can use it for any directory you want.

-- Dirk
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