golang/go

runtime: TestSetGCPercent flaky

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#20,076 opened on Apr 21, 2017

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Description

Despite CL 41374, I'm seeing a bunch of trybot failures like https://storage.googleapis.com/go-build-log/6c83b9bd/linux-amd64_cce08b9e.log:

--- FAIL: TestSetGCPercent (0.17s)
	garbage_test.go:151: NextGC = 172 MB, want 150±20 MB

cc @aclements

Contributor guide

Research direction
Examine the test failure log to identify the specific memory size discrepancy. Check if recent changes to GC trigger or heap layout might affect the expected NextGC value. Reproduce the flake by running the test repeatedly under stress conditions or with different GC configurations.
Tech stack
go
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Go
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50