On Tue, 7 Apr 2026 13:44:37 GMT, Tobias Hartmann <[email protected]> wrote:
> The test randomly excludes methods from C1/C2 compilation to stress test the > calling convention. While this has been proven to be extremely helpful for > testing the Virtual Threads implementation, it's also extremely slow - > especially when we are unlucky enough for multiple methods to be excluded > both from C1 and C2 compilation. On slow machines and in combination with > other VM flags, test execution time can easily exceed an hour. > > While we could now try to improve how these methods are selected, I don't > think it's worth it and we risk wasting significant machine hours just > running methods in the interpreter. I therefore disabled this test feature by > default. It can still be re-enabled for debugging / stress testing purposes > on demand. Long-term, we should add this capability to the VM. I filed > [JDK-8381751](https://bugs.openjdk.org/browse/JDK-8381751) for this. > > Thanks, > Tobias That's unfortunate but I agree that we should better use the machine hours differently instead. ------------- Marked as reviewed by chagedorn (Committer). PR Review: https://git.openjdk.org/valhalla/pull/2306#pullrequestreview-4068567062
