use dist.all_reduce(min) to sync num_blocks_local (#2933)

* pre-commit all files check

* reduce min num_blocks_local

* fix nranks=1

* pre-commit when commit-msg

.pre-commit-config.yaml

@@ -3,6 +3,7 @@ default_install_hook_types:
   - commit-msg
 default_stages:
   - pre-commit # Run locally
+  - commit-msg
 #   - manual # Run in CI
 repos:
 -   repo: https://github.com/psf/black.git