GHA: Use Linux ARM runners for build and test

Author: dalcinl

.cibw/setup-build.py

@@ -61,7 +61,7 @@ def pp3(y_min=7, y_max=10):
 
 GHA_RUNNER = {
     "Linux": {
-        "aarch64": "ubuntu-latest",
+        "aarch64": "ubuntu-24.04-arm",
         "ppc64le": "ubuntu-latest",
         "x86_64": "ubuntu-latest",
         None: "ubuntu-latest"

.cibw/setup-test.py

@@ -90,14 +90,15 @@
     assert match is not None
     std, mpi, py, x, y, ostag, archtag = match.groups()
     osname, mpiabi, x, y = osmap[ostag], f"{std}-{mpi}", int(x), int(y)
-    for arch in ("x86_64", "AMD64", "arm64"):
+    for arch in ("x86_64", "AMD64", "arm64", "aarch64"):
         if arch.lower() in archtag.lower():
             builds.append((osname, arch, mpiabi, py, (x, y)))
 builds = sorted(builds, key=lambda r: (r[0].lower(), *r[1:]))
 
 
 runners = {
-    "Linux-x86_64": "ubuntu-22.04",
+    "Linux-aarch64": "ubuntu-24.04-arm",
+    "Linux-x86_64": "ubuntu-24.04",
     "macOS-arm64": "macos-14",
     "macOS-x86_64": "macos-13",
     "Windows-AMD64": "windows-2022",
@@ -130,9 +131,13 @@
 
 
 runners = {
+    "Linux-aarch64": [
+        "ubuntu-22.04-arm",
+        "ubuntu-24.04-arm",
+    ],
     "Linux-x86_64": [
-        "ubuntu-20.04",
         "ubuntu-22.04",
+        "ubuntu-24.04",
     ],
     "macOS-arm64": [
         "macos-14",

.github/workflows/cd-wheel.yml

@@ -130,7 +130,7 @@ jobs:
       working-directory: mpi4py.git
 
     - id: setup-qemu
-      if: ${{ runner.os == 'Linux' }}
+      if: ${{ runner.os == 'Linux' && matrix.arch == 'ppc64le' }}
       uses: docker/setup-qemu-action@v3
       with:
         platforms: all
@@ -265,6 +265,13 @@ jobs:
       matrix-test-gh: ${{ steps.setup.outputs.matrix-test-gh }}
     steps:
     - uses: actions/checkout@v4
+    - if: ${{ contains(needs.setup.outputs.os-arch-list, '"Linux-aarch64"') }}
+      uses: actions/download-artifact@v4
+      with:
+        path: wheelhouse
+        pattern: build-Linux-aarch64-*
+        merge-multiple: true
+    - uses: actions/checkout@v4
     - if: ${{ contains(needs.setup.outputs.os-arch-list, '"Linux-x86_64"') }}
       uses: actions/download-artifact@v4
       with: