On 18/10/2025 00:13, Man Cao wrote:
Thanks for the detailed response. We hope OpenJDK will commit to supporting custom schedulers at some point.
Do you know if David/Firestore team have tried one or both of the prototypes in the loom repo? It would be helpful to this project to know what they have tried, what worked and didn't work. I think it would at least be useful to know if they have tried setting the virtual thread scheduler to a deterministic stride scheduler.
I think it would also be useful to expand on the comment about antagonistic workloads and if that assumes a means to do forced preemption. There is a prototype support for forced preemption but going further would require detailed changes in several core areas of the JDK and some features for a scheduler to control it.
-Alan
