🚀 Feature

Currently, the Linux CI checks that are tests are run on large resource_class executors, which are run on machines that don't support AVX512. To test ATen AVX512 kernels, xlarge executors would be required, as these VMs are run on Intel Cascade Lake machines that support AVX512.

Pitch

Some CI checks should be run on xlarge instances, which have AVX512 support. The number of CI tests running on xlarge instances can probably be limited in order to not vastly increase CI costs.

cc @ezyang @seemethere @malfet @walterddr @pytorch/pytorch-dev-infra @ngimel @VitalyFedyunin