On Fri, 23 Feb 2024 08:21:11 GMT, Long Yang <duke@openjdk.org> wrote:
hi
I would like to fix this.
As the description in [JDK-8326446](https://bugs.openjdk.org/browse/JDK-8326446). JFR uses task_info() with flavor TASK_ABSOLUTETIME_INFO to read User and System time. it is not reliable on Apple m1.
Libc provides the [times](https://man7.org/linux/man-pages/man2/times.2.html) function, which uses TASK_BASIC_INFO_COUNT and TASK_THREAD_TIMES_INFO_COUNT. It will also return the real time of the process, and the time unit is the same, which is suitable for solving this problem.
I ran test/jdk/jdk/jfr/event/os/TestCPULoad.java and passed.
I would appreciate it if you could review this.
Long Yang has updated the pull request incrementally with one additional commit since the last revision:
update copyright header
Marked as reviewed by egahlin (Reviewer). ------------- PR Review: https://git.openjdk.org/jdk/pull/17976#pullrequestreview-1922606074