RFR: 8326012: JFR: Event for safepoint timeout [v2]

Fri Feb 16 16:14:53 UTC 2024

On Fri, 16 Feb 2024 14:24:00 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> Can the event use the settings enabled and threshold instead of XX:+SafepointTimeout -XX:SafepointTimeoutDelay=x? Then the event can be configured from command line, a .jfc file and remotely over JMX. Perhaps the event can be enabled by default with a high threshold? Would this work, or am I missing something?

It works.

If implemented in this way, I think `EventTimeToSafepoint` is a more suitable name.

`start_time` of this event is `SafepointTracing::_last_safepoint_begin_time_ns`, and `end_time` is the time when vm_thread found the target thread is not running.

What do you think?

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PR Comment: https://git.openjdk.org/jdk/pull/17888#issuecomment-1948766675