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smoothness.gpu_rasterization.polymer failing on multiple builders

Project Member Reported by sheriff-...@appspot.gserviceaccount.com, Feb 8 2018

Issue description

Suspecting a large number of random test crashes on the Windows bots have the same cause; most of them started around the morning of Jan 31.
📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/17b98c85840000
📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/16fd2d65840000
📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/14ecfd85840000
📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/11b45e89840000

Comment 11 by dtu@chromium.org, Feb 9 2018

I've deployed a fix: https://chromium-review.googlesource.com/c/catapult/+/900296
It's an increase to maximum repeat count, to increase the sensitivity for small differences.

And re-ran the job in comments 4/7, which is the one that showed the biggest difference (~98% passing to ~80% passing)

Comment 12 by dtu@chromium.org, Feb 10 2018

Cc: dtu@chromium.org
Project Member

Comment 13 by 42576172...@developer.gserviceaccount.com, Feb 10 2018

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/14cd2595840000
Project Member

Comment 15 by 42576172...@developer.gserviceaccount.com, Feb 10 2018

Cc: hta@chromium.org hbos@chromium.org
Owner: hbos@chromium.org
Status: Assigned (was: Available)
📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/14965b95840000

Define legacy getLocalStreams() on top of track-based API. by hbos@chromium.org
https://chromium.googlesource.com/chromium/src/+/55a6f822232bb39ce9296fe9de7baae0df12b244

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Comment 16 by dtu@chromium.org, Feb 11 2018

Cc: -hbos@chromium.org -hta@chromium.org simonhatch@chromium.org
Owner: dtu@chromium.org
Sorry, I used the new re-run button and it looks like it always runs with auto_explore == False.
Project Member

Comment 19 by 42576172...@developer.gserviceaccount.com, Feb 14 2018

📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/11fe883d840000

Comment 20 by dtu@chromium.org, Feb 16 2018

Last job narrowed it down to 533349-533369, so I'm going to run one with that range.
Sorry about all the retries, Pinpoint is tuned for larger regressions, and 100% passing -> 80% passing is close to the limit.
Project Member

Comment 22 by 42576172...@developer.gserviceaccount.com, Feb 16 2018

📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/13c43a9d840000

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