Re: [PATCH v4 0/2] sched: Enable preferred SMT siblings on NVIDIA Olympus

[Andrea Righi <arighi@nvidia.com>]

Hi Dietmar,

On Wed, Sep 09, 2026 at 09:20:35AM +0200, Dietmar Eggemann wrote:
> On 08.09.26 10:23, Andrea Righi wrote:
> 
> [...]
> 
> > The series was tested on a two-node Vera system using an 88-thread
> > single-precision GEMM on the 88 physical cores of NUMA node 0.
> 
> Can we use 'OpenBLAS benchmark/sgemm.goto' as an open alternative for
> your NVIDIA internal single-precision GEMM benchmark?
> 
> IIUC, you used it for the 'Prefer fully idle cores for NOHZ balancing'
> work: https://lore.kernel.org/r/anIq6pU5KXTTFCDN@gpd4
> 
> If yes, I assume you would run something like:
> 
> export OMP_NUM_THREADS=88
> numactl -C XXX --membind=0 ./benchmark/sgemm.goto 16384 16384 16384
> 
> Essentially you want to show that those 88 compute intensive tasks each
> runs on his own core alone and so you get a higher TFLOPS value.
> 
> [...]

Yes, sure! I'll re-run some tests with that and share the results in a bit.

Thanks,
-Andrea