MasterJH5574 opened a new pull request, #15401: URL: https://github.com/apache/tvm/pull/15401
This PR introduces the warp-level shuffle primitives used in Metal Shading Language, and uses them in the implementation of allreduce lowering. The introduced primitives are: * `simd_shuffle`, * `simd_shuffle_up`, * `simd_shuffle_down`. See section 6.9.2 of https://developer.apple.com/metal/Metal-Shading-Language-Specification.pdf for details. The correctness are validated by `test_allreduce_cuda` with the backend changed to Metal. Given we do not have Metal CI tests, the correctness is checked only locally. Given the Metal shuffle primitives do not support (or need) masking, the pass LowerThreadAllreduce is updated to support such backend which does not have masks. One unit test for metal is added to ensure that no mask is used. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
