News for hackers. Stuff that matters.

A comment on Java BitSet performance-flicker mystery. Parent comment

Re:Java BitSet performance-flicker mystery by plasma on Saturday February 05, 2022 @06:07PM (#30227275)
I’m not a Java expert, but potentially due to the CPU/memory OS scheduler?

Try running the workload with pinned CPUs assigned and not across NUMA nodes.

[ Parent | on HN ]
Re:Java BitSet performance-flicker mystery by myrryr on Saturday February 05, 2022 @10:07PM (#30228951)
Try running the workload with pinned CPUs assigned ^^^--- it will be this.

I've run into the same weirdness on other things and this always solves it. Some cores are better at some things than others.

[ Parent | on HN ]
Re:Java BitSet performance-flicker mystery by cospaia on Sunday February 06, 2022 @12:51PM (#30234927)
It was indeed this.
[ Parent | on HN ]