RFR: 8360046: Scalability issue when submitting virtual threads with almost empty tasks [v5]

[Viktor Klang]

On Mon, 11 Aug 2025 16:40:28 GMT, Viktor Klang <vklang at openjdk.org> wrote:

>> Doug Lea has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Avoid underutilization on resize
>
> src/java.base/share/classes/java/lang/VirtualThread.java line 324:
> 
>> 322:         } else {
>> 323:             executor.execute(task);
>> 324:         }
> 
> Is this worth special-casing—IIRC FJP::submit adapts the task if needed already.

Ah, this is about getting a `AdaptedRunnableAction` rather than a `RunnableExecuteAction` (where the latter is an InterruptibleTask, and the former isn't). Sounds worth of a comment here?

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/26479#discussion_r2267400540