Re: [RFC][PATCH] sched: Cache aware load-balancing

Peter Zijlstra
2025-03-26T09:42:50Z

On Wed, Mar 26, 2025 at 05:15:24PM +0800, Chen, Yu C wrote:
> Thanks for running the test. I think hackbenc/schbench would be the good
> benchmarks to start with. I remember that you and Gautham mentioned that
> schbench prefers to be aggregated in a single LLC in LPC2021 or 2022. I ran
> a schbench test using mmtests on a Xeon server which has 4 NUMA nodes. Each
> node has 80 cores (with SMT disabled). The numa=off option was appended to
> the boot commandline, so there are 4 "LLCs" within each node.

We really should look at getting the SnC topology even without SnC being
in use.

The sheer size of these LLCs is untenable.