Closed Bug 1591938 Opened 4 months ago Closed 3 months ago

Some timing distributions buckets are only one nanosecond apart

Categories

(Data Platform and Tools :: Glean: SDK, defect, P3)

defect

Tracking

(Not tracked)

RESOLVED INVALID

People

(Reporter: mdroettboom, Unassigned)

References

Details

(Whiteboard: [telemetry:glean-rs:m?])

Looking at Geckoview page_load_times timing distributions, some of the bins are only one nanoseconds wide.

This query: https://sql.telemetry.mozilla.org/queries/65670/

The binning:

7,692,387	2,502	0.01	0.17	
8,388,607	5	0.00	0.17	
8,388,608	1,937	0.00	0.17	
9,975,792	1,518	0.00	0.18	

No investigation has yet been performed. However -- some hypotheses:

This may be due to slightly different calculations between glean-core and glean-ac.

We may be seeing it coming from different Android SDK versions.

We should confirm we never see it coming from the same client.

The only cases where the "1 nanosecond less" buckets appears is from clients running Android SDK 22.

https://sql.telemetry.mozilla.org/queries/65674/source

Summary: Some timing distributions are only one nanosecond apart → Some timing distributions buckets are only one nanosecond apart
See Also: → 1592930

Closing this in favor of opening a bug to delete bad data.

Status: NEW → RESOLVED
Closed: 3 months ago
Resolution: --- → INVALID
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