Bug 15615

Summary: Builds schedule unevenly across the cluster
Product: [Infrastructure] AutoBuilder Reporter: Michael Halstead <mhalstead>
Component: autobuilderAssignee: Richard Purdie <richard.purdie>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: Medium+ CC: infras.ab.watcher, Infras.watcher, pidge, tim.orling
Version: unspecified   
Target Milestone: 5.2 M3   
Hardware: x86   
OS: Multiple   
Whiteboard:
OS type for building Yocto: --- Type of Regression: ---
Verified: Documentation change: No (bug/feature does not impact docs)

Description Michael Halstead 2024-10-09 21:32:38 UTC 
Ideally the build scheduler would assign one job to each candidate worker before assigning a second or third job to the same worker.

Right now it's possible to have a single a-full with 3 builds running on half the available workers while the other half of the workers sit idle.

The problem is more apparent with the increased number of workers in the Valkyrie cluster.
Comment 1 Richard Purdie 2024-10-10 10:15:33 UTC 
We do customise the build scheduler so this is possibly a bug with how we've done that.
Comment 2 Michael Halstead 2024-12-19 21:42:08 UTC 
Due to be fixed once we pull in changes from https://github.com/buildbot/buildbot/pull/6286. Blocked on Yocto Project plugin updates.
Comment 3 Richard Purdie 2025-03-24 09:50:28 UTC 
Wasn't quite that simple but fixed with: https://git.yoctoproject.org/yocto-autobuilder2/commit/?id=754040f52cbf4d65d5c1df22d56f7687486e02a2