Re: [PATCH v2] sched/topology: Enable topology_span_sane check only for debug builds

On Tue, Nov 19, 2024 at 11:54:57AM +0530, K Prateek Nayak wrote:

(+ Steve)

Hello Saurabh, On 11/18/2024 3:09 PM, Saurabh Sengar wrote:

...

On a x86 system under test with 1780 CPUs, topology_span_sane() takes around 8 seconds cumulatively for all the iterations. It is an expensive operation which does the sanity of non-NUMA topology masks.

Steve too was optimizing this path. I believe his latest version can be found at: https://lore.kernel.org/lkml/20241031200431.182443-1-steve.wahl@hpe.com/

Yes, Saurabh, I'd be very interested in whether my current patch relieves your situation.

Thanks,

--> Steve Wahl