On Sat, 13 Feb 2021 05:46:32 GMT, Chris Plummer <[email protected]> wrote:
> > Yes, It is not known at present, but the heapInspect and heapDumper accept > > an outputStream, and the actual parallel thread number can be got by > > gang->active_workers() after WithUpdatedActiveWorkers. Then maybe some code > > can be added there to record the actual number and finally print to > > outputStream at the end. > > So you are proposing having the attach "heapdumpext" and "inspectheap" > commands always print the number of threads used? I'm not so sure that is a > good idea since there are probably existing tools and tests that parse the > output, and changing its format could break them. Correct， if there is parsing tools (which I think there alreay are.), they will be broken. So I am afraid user can only tuning the thread number by expriments and some common sense such as the core number of their server or the multi-processing scenario. ------------- PR: https://git.openjdk.java.net/jdk/pull/2379
