RFR: 8357473: Compilation spike leaves many CompileTasks in free list

[Vladimir Kozlov]

On Fri, 23 May 2025 09:42:17 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See bug for more discussion.
> 
> This PR implements the "all the way" solution by removing the free list completely. It complements https://github.com/openjdk/jdk/pull/25364, and can go either first, or second. We will remerge the other one once either integrates.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, `compiler`
>  - [ ] Linux AArch64 server fastdebug, `all`

Did you do performance compare?

src/hotspot/share/compiler/compileTask.cpp line 81:

> 79: 
> 80: CompileTask::~CompileTask() {
> 81:   assert(!lock()->is_locked(), "Should not be locked when freed");

Do we need to free `_lock` ?

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PR Comment: https://git.openjdk.org/jdk/pull/25409#issuecomment-2904951634
PR Review Comment: https://git.openjdk.org/jdk/pull/25409#discussion_r2104908263