while we're at it, also a metric about the number of CQ attempts for a committed CL.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/61780258276dd9f69058cbf4e593bdca598508c9

commit 61780258276dd9f69058cbf4e593bdca598508c9
Author: Aviv Keshet <akeshet@chromium.org>
Date: Sat Feb 25 12:19:52 2017

clactions: record a distribution metric for the number of CQ pickups per CL

BUG= chromium:693177 
TEST=new unittest added

Change-Id: Ibe129a3eef4c3bff392c10556a323ac4fdb4aaef
Reviewed-on: https://chromium-review.googlesource.com/444280
Commit-Ready: Aviv Keshet <akeshet@chromium.org>
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>

[modify] https://crrev.com/61780258276dd9f69058cbf4e593bdca598508c9/lib/constants.py
[modify] https://crrev.com/61780258276dd9f69058cbf4e593bdca598508c9/lib/clactions_unittest.py
[modify] https://crrev.com/61780258276dd9f69058cbf4e593bdca598508c9/lib/clactions.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/9e8a8d09475c2c665f5e6981618649ad9e2eebde

commit 9e8a8d09475c2c665f5e6981618649ad9e2eebde
Author: Aviv Keshet <akeshet@chromium.org>
Date: Thu Mar 02 02:42:20 2017

completion_stages: add CQ wall-clock metric

BUG= chromium:693177 
TEST=unittests pass

Change-Id: I04e79657c685dd2c0cef0c363544cf186ff8c5df
Reviewed-on: https://chromium-review.googlesource.com/444452
Commit-Ready: Aviv Keshet <akeshet@chromium.org>
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Paul Hobbs <phobbs@google.com>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>

[modify] https://crrev.com/9e8a8d09475c2c665f5e6981618649ad9e2eebde/lib/constants.py
[modify] https://crrev.com/9e8a8d09475c2c665f5e6981618649ad9e2eebde/cbuildbot/stages/completion_stages.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/9e8a8d09475c2c665f5e6981618649ad9e2eebde

commit 9e8a8d09475c2c665f5e6981618649ad9e2eebde
Author: Aviv Keshet <akeshet@chromium.org>
Date: Thu Mar 02 02:42:20 2017

completion_stages: add CQ wall-clock metric

BUG= chromium:693177 
TEST=unittests pass

Change-Id: I04e79657c685dd2c0cef0c363544cf186ff8c5df
Reviewed-on: https://chromium-review.googlesource.com/444452
Commit-Ready: Aviv Keshet <akeshet@chromium.org>
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Paul Hobbs <phobbs@google.com>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>

[modify] https://crrev.com/9e8a8d09475c2c665f5e6981618649ad9e2eebde/lib/constants.py
[modify] https://crrev.com/9e8a8d09475c2c665f5e6981618649ad9e2eebde/cbuildbot/stages/completion_stages.py

This metric exists now. http://shortn/_womXmeDFsD

Is there an easy way to convert that to a percentage good CQ time?  Hard to digest it in the format it is currently.

Fraction of time (in previous 24hr) that were spent in a CQ run that submitted anything:
http://shortn/_1LCzl8RYow