This request is for a pair of backports. 8231209 is the first (and primary), 8231968 is a minor cleanup. There are CSR’s for both. The effect is to add a convenience method getCurrentThreadAllocatedBytes() to com.sun.management.ThreadMXBean that can be implemented more efficiently than the equivalent getThreadAllocatedBytes(long id), and to make the implementation of getThreadAllocatedBytes(long id) and getThreadAllocatedBytes(long[] id) more efficient. These methods are heavily used by heap profiling tools, including Amazon’s, and their efficiency is important to us. There is no effect on the TCK because com.sun.management is a platform-specific package. See the CSRs for more detail.
The patches apply cleanly (in sequence) to 11u, but I’m posting a review/approval request because the backport CSRs need approval. Once the backport CSRs are reviewed, finalized, and approved, l can tag 8231209 and 8231968. Tested with hotspot/jtreg/vmTestbase/nsk/monitoring jdk/com/sun/management jdk/jdk/jfr/event/runtime The same tests pass/fail as with unpatched jdk11u-dev. JDK-8231209: [REDO] JDK-8207266 ThreadMXBean::getThreadAllocatedBytes() can be quicker for self thread Original RFE: https://bugs.openjdk.java.net/browse/JDK-8231209 Original Patch: https://hg.openjdk.java.net/jdk/jdk/rev/c29e49148be7 Original CSR: https://bugs.openjdk.java.net/browse/JDK-8231374 Original review thread: https://mail.openjdk.java.net/pipermail/serviceability-dev/2019-September/029208.html Backport RFE: https://bugs.openjdk.java.net/browse/JDK-8247806 Backport CSR: https://bugs.openjdk.java.net/browse/JDK-8247807 JDK-8231968: getCurrentThreadAllocatedBytes default implementation s/b getThreadAllocatedBytes Original RFE: https://bugs.openjdk.java.net/browse/JDK-8231968 Original Patch: https://hg.openjdk.java.net/jdk/jdk/rev/5bb426e9acc4 Original CSR: https://bugs.openjdk.java.net/browse/JDK-8232072 Original review thread: https://mail.openjdk.java.net/pipermail/serviceability-dev/2019-October/029659.html Backport RFE: https://bugs.openjdk.java.net/browse/JDK-8247809 Backport CSR: https://bugs.openjdk.java.net/browse/JDK-8247810 Thanks, Paul
