[webkit-dev] LayoutTests results fallback graph

Dirk Pranke dpranke at chromium.org
Wed Jul 13 13:36:42 PDT 2011

On Wed, Jul 13, 2011 at 1:28 PM, Adam Barth <abarth at webkit.org> wrote:
> On Wed, Jul 13, 2011 at 1:21 PM, Dirk Pranke <dpranke at chromium.org> wrote:
>> On Tue, Jul 12, 2011 at 10:01 PM, Dirk Pranke <dpranke at chromium.org> wrote:
>>> On Tue, Jul 12, 2011 at 9:01 PM, Adam Barth <abarth at webkit.org> wrote:
>>>> On Tue, Jul 12, 2011 at 8:34 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
>>>>> On Tue, Jul 12, 2011 at 8:19 PM, Dirk Pranke <dpranke at chromium.org> wrote:
>>>>>> Hum. I take it back ... it still wouldn't be a tree, since
>>>>>> chromium-mac-leopard would fall back to chromium-mac-snowleopard, then
>>>>>> mac-leopard, but chromium-mac-snow-leopard would fall back to
>>>>>> mac-snowleopard (giving chromium-mac-snowleopard two parents). And it
>>>>>> looks like chromium-mac-leopard picks up 3,494 baselines from
>>>>>> mac-leopard :(.
>>>>> Can we create chromium-mac and move everything that's shared between
>>>>> chromium-mac-leopard and chromium-mac-snowleopard there?
>>>>> It seems wrong for chromium-mac-leopard to fallback to
>>>>> chromium-mac-snowleopard.
>>>> This somewhat surprising fallback strategy is common across ports.
>>>> The "why" is explained on this wiki page:
>>>> http://trac.webkit.org/wiki/LayoutTestsSearchPath
>>> In addition, we do actually have a 'chromium-mac'; we don't have a
>>> 'chromium-mac-snowleopard'. I think I mixed that in my mind while
>>> typing this with the apple mac ports, where there are mac-leopard,
>>> mac-sl, and mac ports (the latter representing lion/future).
>>> Once Lion ships, chromium will undoubtedly add a chromium-mac-snowleopard dir.
>>> -- Dirk
>> Okay, I pulled together a slightly more comprehensive report ... in
>> short, we pull things from everywhere. Maybe this is useful to someone
>> if they want to try and treeify the fallbacks :)
>> The format should be fairly self-explanatory. It is a rollup report
>> for all of the baselines, grouped on the combination of ports,
>> platforms, and type of baselines. The first column is the
>> port/platform configuration. The second is the location of the test
>> ("generic" means not in a platform/* directory). The third is the type
>> of baseline for the test, the fourth is the location of the baseline
>> used, and the fifth is the total # of such baselines in that location.
> To confirm my understanding:
> This row means that the Chromium Mac port running on Snow Leopard gets
> at least 5567 -expected.png files from the LayoutTests/platform/mac
> directory?
> chromium-mac-snowleopard,generic,png,mac,5567

That is correct.

> This is great data!  If you're interested in crunching numbers, it
> might be interested to hack up the deduplicate-tests script to figure
> out how much of the possible sharing we're realizing with our current
> fallback graph.
> Adam

I'm not sure I follow what you have in mind here ...

-- Dirk

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