Kelvin Nilsen

I'm working on some performance regressions identified on certain tests. Converting to draft until these are resolved.

@rkennke : Thanks for all your careful feedback. If you could be more specific about loops that might result in quadratic behavior, I'll look more closely. There are some loops...

/integrate

I'm going to leave this as draft until I complete more testing. Publishing now in draft form for collaboration and discussion with other developers.

FWIW, I have confirmed that the "problem" workload we have been debugging does emit the message: "KELVIN CONFIRMS PROBLEM"

I should add that when I run top, it confirms that rr is still running and is consuming "100%" of one core's available CPU time.

I'm running: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 22.04.2 LTS Release: 22.04 Codename: jammy Command line: ~/lib/rr-5.6.0-Linux-x86_64/bin/rr record -h -n --disable-cpuid-features-ext 0xfc230000,0x2c42,0xc --num-cores=8 \ ~/github/shenandoah.expand-old-on-demand/build/linux-x86-server-slowdebug/jdk/bin/java \...

Thanks for quick responses to my issue.

/integrate

After merging, I'm experiencing many unsuccessful GHA tests. These were apparently introduced by the merge.