Mechanism to detect performance CPU core is not reliable

[ykhrustalev]

When running the code

executorch::extension::cpuinfo::get_num_performant_cores()

It will report all cores in some cases, in particular

• Apple iPhone 14
• Pixel8

related to pytorch/executorch#10549

[ykhrustalev]

@digantdesai can't assign directly

[kimishpatel]

@ykhrustalev I am actually working on this. Few things have been derailing it.

[kimishpatel]

#290 solves for apple silicon

[kimishpatel]

can you say more about pixel 8. What does it report? I think that one should just work

[kimishpatel]

#290 solves for apple silicon

Integration into executorch is pending

[ykhrustalev]

can you say more about pixel 8. What does it report? I think that one should just work

can't reproduce on the recent executorch

Integration into executorch is pending

thank you, Kimish

[kimishpatel]

Ok this pytorch/executorch#11268 should fix the executorch issue as well