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Issue 677985 link

Starred by 1 user
Status: Untriaged
Owner: ----
Cc:
sullivan@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: All
Pri: 3
Type: Bug



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CPU utilization % in telemetry results is huge

Project Member Reported by bokan@chromium.org, Jan 3 2017 
The CPU utilization % appears to need a division by 100. See the attached screenshot. The graph axis is correctly labeled but the raw values in the columns are in the thousands.

Not sure if this is a problem with the benchmark itself or with the dashboard/results view.
Screenshot from 2017-01-03 12:11:29.png
194 KB View Download

Comment 1 by eakuefner@chromium.org, Jan 3 2017

Cc: sullivan@chromium.org
I expect that this isn't a problem with results2; percentages don't really get scaled by ScalarSpans and you can see percentages that look perfectly reasonable in webm_other below.

I'm not sure where this metric comes from, but I'm fairly certain that there's some type of error in the metric itself.

Comment 2 by eakuefner@chromium.org, Jan 3 2017 

Looks like this is the point in legacy code where this value is added:

https://cs.chromium.org/chromium/src/tools/perf/metrics/cpu.py?q=cpu_utilization&sq=package:chromium&dr=C&l=57

Some suspicious multiplication happening above there. I wonder if this is a platform-specific bug.

Comment 3 by benhenry@google.com, Jan 16

Components: Test>Telemetry

Comment 4 by benhenry@google.com, Jan 16

Components: -Tests>Telemetry
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