On Wed, 21 Oct 2020 20:04:54 GMT, Chris Plummer <cjplum...@openjdk.org> wrote:
> > > I'm not following how the introduction of LinkedListOfLongArrays is making > the OOME even more reliable. Can you please elaborate? The new LinkedListOfLongArrays is created by renaming LinkedList to LinkedListOfLongArrays. The new LinkedList is a list node without payload, so it is smaller than a LinkedListOfLongArrays node. I try to fill the last free blocks with these. But yeah, this won't make that much of a difference. > Is consumeAllMemory() being called from a different thread than the one doing > the forceEarlyReturn? If so, you might be running into an issue because the > tlab still has available memory to allocate. Yes, the threads are different (well observed :)). As far as I know tlabs are retired before gc. I'd expect that they are allocated lazily. So the jdwp agent thread that does the forceEarlyReturn should not have a tlab at hand. Certainly these are just assumptions. It would be easy to implement the gc interface(*) with different heuristics. (*) Roman Kennke and Aleksey Shipilev demo'ed implementing the gc interface in a FOSDEM talk. ------------- PR: https://git.openjdk.java.net/jdk/pull/775
