Linux Cluster-Aware Scheduling Being Extended To AMD Processors

[phoronix]

Phoronix: Linux Cluster-Aware Scheduling Being Extended To AMD Processors

Back in 2021 saw work on CPU cluster-aware scheduling by HiSilicon engineers for Arm processors as well as Intel engineers with a focus on their Jacobsville platform being comprised of clusters of Atom cores. That x86 cluster-aware scheduling was enabled for capable Intel processors while now two years later is being extended for AMD processors...

https://www.phoronix.com/news/AMD-Linux-L2-Cluster-Scheduler

[aviallon]

Thanks for the news Michael, just rebuilt my kernel with the patch, will post some benchmark when they finish (I just launched pts/developer tonight)

Edit 3 : updated with "correct" benchmarks : https://openbenchmarking.org/result/...95&hni=1&ppt=D

Leftmost system (the most recent benchmark) is with the patch applied. If the results are to be believed, some workloads benefit from a very measurable increase in performance.

[Mark Rose]

It'll be interesting to see how much of an impact this has.

I wonder how this affected Knights Landing back in the day, which had 4-way SMT and shared L2 caches.

AMD Bulldozer also had shared L2 caches in a module, so that could be interesting to benchmark if you still have such a system hanging around.

[boxie]

It'll be interesting to see how much of an impact this has.

I wonder how this affected Knights Landing back in the day, which had 4-way SMT and shared L2 caches.

AMD Bulldozer also had shared L2 caches in a module, so that could be interesting to benchmark if you still have such a system hanging around.

the answer will probably be 0, since it wouldn't be enabled for those CPUs without work

[rene]

For those who do not want to wait until v6.4 it is now in default kernel at: https://t2sde.org/packages/linux