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Issue 757965 link

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Status: Untriaged
Owner: ----
Cc:
█ robert...@chromium.org
chanli@chromium.org
lijeffrey@chromium.org
liaoyuke@chromium.org
st...@chromium.org
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Pri: 3
Type: Bug

Blocking:
issue 756173



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[Findit] Use commit positions instead of build numbers for build-level exponential search

Project Member Reported by wylieb@chromium.org, Aug 22 2017 
Example here:
https://findit-for-me.appspot.com/waterfall/flake?key=ag9zfmZpbmRpdC1mb3ItbWVysQELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCJ7Y2hyb21pdW0ubWVtb3J5L0xpbnV4IEFTYW4gTFNhbiBUZXN0cyAoMSkvMzgxODIvY2FzdF91bml0dGVzdHMvUlc1a01rVnVaRlJsYzNRdVUyaHZkbVZJYVdkb1JuSmhiV1ZTWVhSbFJHOTNibGxsY2xSb2NtOWhkQT09DAsSE01hc3RlckZsYWtlQW5hbHlzaXMYAQw

It's strange that there's so many data points clustered at the front when we haven't found a 100% data point yet. Shouldn't we lookback until we find where the test is passing, then move forward to find where it failed?

Ignore the error that it ended in -- we should improve how this works.

Shouldn't we do an exponential search backward, then a binary search forward?

Comment 1 by st...@chromium.org, Aug 23 2017

Status: Available (was: Untriaged)
Summary: [Findit] Use commit positions instead build numbers for build-level exponential search (was: [Findit] Unusual distribution of data points when a test is flaky for a long time.)
Currently the exponential search is based on build number. If commits are not evenly distributed, some build number might cluster in the diagram because the x-axis is commit position instead build numbers.

Comment 2 by st...@chromium.org, Aug 23 2017

Summary: [Findit] Use commit positions instead of build numbers for build-level exponential search (was: [Findit] Use commit positions instead build numbers for build-level exponential search)
Project Member

Comment 3 by sheriffbot@chromium.org, Aug 23

Labels: Hotlist-Recharge-Cold
Status: Untriaged (was: Available)
This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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