On Sun, 29 May 2022 14:46:39 GMT, Alan Bateman <al...@openjdk.org> wrote:
> This patch adds an alternative virtual thread implementation where each > virtual thread is backed by an OS thread. It doesn't scale but it can be used > by ports that don't have continuations support in the VM. Aside from > scalability, the lack of continuations support means: > > 1. JVM TI is not supported when running with --enable-preview (the JVM TI > spec allows for this) > 2. jshell --enable-preview can't be used (as jshell uses the debugger APIs > and so needs JVM TI) > > The VM option "VMContinuations" is added as an experimental option so it can > be used by tests. A number of tests are changed to re-run with > -XX:-VMContinuations. A new jtreg property is added so that tests that need > the underlying VM support to be present can use "@requires vm.continuations" > in the test description. A follow-up change would be to add "@requires > vm.continuations" to the ~70 serviceability/jvmti/vthread that run with > preview features enabled. This pull request has now been integrated. Changeset: 6ff2d89e Author: Alan Bateman <al...@openjdk.org> URL: https://git.openjdk.java.net/jdk/commit/6ff2d89ea11934bb13c8a419e7bad4fd40f76759 Stats: 747 lines in 72 files changed: 574 ins; 53 del; 120 mod 8287496: Alternative virtual thread implementation that maps to OS thread Reviewed-by: rehn, mchung ------------- PR: https://git.openjdk.java.net/jdk/pull/8939
