Martin Kustermann
143c1b9dac
If a custom embedder does not use the VM's thread pool implementation (1) but instead installs a custom message handler and invokes that message handler on possibly unlimted number of threads, those mutator threads will be constantly fighting to obtain TLABs. To avoid this, the VM will ensure that only a limited number of mutators can execute at the same time. The limit is the same as we use for determining the VM's mutator thread pool. In order to test this, we simulate such an embedder by disabling the mutator pool limit, thereby allowing unlimited number of thread pool workers. => The added test would timeout without without the new limit imposed by this CL. (1) Which has a maximum size adjusted based on TLAB size and new space size. Issue https://github.com/dart-lang/sdk/issues/36097 Change-Id: I6d459f85fbeb3e4b1d756b752853157e40097271 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148121 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>