Add a README on how to run with act

.github/workflows/README_act.md

@@ -0,0 +1,43 @@
+# Running GitHub CI locally with `act`
+
+The `act` tool (https://github.com/nektos/act) allows you to run GitHub Actions
+workflows locally using Docker. This can be useful for debugging CI logic,
+reproducing failures, or iterating on workflow changes without pushing commits
+to GitHub.
+
+## Installation
+
+There is currently no official Ubuntu package for `act`. Installation options
+include:
+
+- Pre-built binaries, available at  
+  https://nektosact.com/installation/index.html#pre-built-artifacts
+- The conda-forge package:  
+  https://github.com/conda-forge/act-feedstock
+
+Make sure that Docker is installed and that your user has permission to access
+the Docker daemon.
+
+## Running the TransformerEngine CI workflow
+
+To run the CI job locally, use:
+
+```console
+$ act -j build_and_test --matrix runner:linux-mi325-8 -P linux-mi325-8=-self-hosted
+```
+
+## Caching and Cleanup
+
+`act` caches intermediate data (such as runner state and action checkouts) in
+`~/.cache/act`. This cache can grow significantly over time and is safe to
+delete if disk space becomes an issue.
+
+To inspect the current size of the cache:
+
+```console
+$ du -sh ~/.cache/act/
+```
+
+The workflow launches Docker containers internally. If an `act` run
+is interrupted, containers may be left running and consume disk space. Use
+`docker ps` and `docker rm -f` to clean up if needed.

transformer_engine/common/ck_fused_attn/aiter_prebuilt.cmake

@@ -57,7 +57,7 @@ function(download_aiter_prebuilt DOWNLOAD_SUCCESS)
   message(STATUS "[AITER-PREBUILT] NVTE_AITER_PREBUILT_BASE_URL is set - Attempting to download ${KEY}.tar.gz ...")
 
   # Check if ${KEY}.tar.gz exists in the URL provided.
-  file(DOWNLOAD "${FILE_URL}.sha256" "/tmp/aiter_prebuilt_sha256.txt" STATUS sha_status LOG sha_log)
+  file(DOWNLOAD "${FILE_URL}.sha256" "/tmp/aiter_prebuilt_sha256.txt" STATUS sha_status LOG sha_log SHOW_PROGRESS)
   list(GET sha_status 0 sha_code)
   if(NOT sha_code EQUAL 0)
     message(WARNING " [AITER-PREBUILT] Prebuild file with Key=${KEY} not available in the NVTE_AITER_PREBUILT_BASE_URL provided.")