Upstream test sharder.

Upstream test sharder.

On chromium for android, we shard tests by splitting the set of tests
and running on multiple connected devices.

BUG=
TEST=build/android/run_tests.py


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=124214

[bulach, 2012-02-28 17:25:47]

hey john,

here's the test sharder. there are two aspects of this change:
1. upstreaming the sharding mechanism
2. allowing multiple emulators (this is upstream only)

they're related, but if you prefer, I could probably split in two patches.. 

note also that it'd be easier to address any comments in patches downstream
first, so that this one is more like a merge / cherry-pick rather than editing..

thanks!

[John Grabowski, 2012-02-28 23:59:27]

LGTM to all of this but...

Can you send this through the android_try bot first?
And can you confirm that you've smoked this, upstream, with >1 phone?
(I've given up on emulators so no need to test that aspect).

[bulach, 2012-02-29 11:40:59]

bots are trying now.
I smoked in my local build with both multiple devices, and also multiple
emulators (emulators don't scale too well for base and other small-ish tests,
the emulator startup dominates the time..).

[commit-bot: I haz the power, 2012-02-29 15:45:43]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/bulach@chromium.org/9494007/3001

[commit-bot: I haz the power, 2012-02-29 18:40:29]

Change committed as 124214

[John Grabowski, 2012-02-29 19:52:30]

In attempts at fixing emulator tests, I did things like
- changed the emulator to stop/start for each test bundle
- completely wipe the emulator image on each test bundle run (!!)

So don't worry about the super-suck.

jrg

On Wed, Feb 29, 2012 at 3:40 AM, <bulach@chromium.org> wrote:

> bots are trying now.
> I smoked in my local build with both multiple devices, and also multiple
> emulators (emulators don't scale too well for base and other small-ish
> tests,
> the emulator startup dominates the time..).
>
>
https://chromiumcodereview.**appspot.com/9494007/<https://chromiumcodereview....
>