RFR: JDK-8329605: hs errfile generic events - introduce sections for Frequent/NotFrequent Events

[Stefan Karlsson]

On Thu, 4 Apr 2024 12:34:19 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Currently the 'generic' hs_errfile Events message log (filled  by Events::log) is rather flooded by messages for memory protection operations. Those seem to occur quite often and move out other less frequent events, because the number of entries in the log is limited.
> It might be better to separate the frequent and less frequent events into 2 sections. The memory protection events would go into the frequent events section.
> The mentioned memory protection operations related entries look like this :
> Event: 0.178 Protecting memory [0x000000016ebf0000,0x000000016ebfc000] with protection modes 0

We still have flooding in the frequent events. Instead of creating a common section for these vent, did you consider creating two new separate, specific sections for memory protection and nmethod flushing?

-------------

PR Comment: https://git.openjdk.org/jdk/pull/18626#issuecomment-2037157291