diff --git a/.github/workflows/diskclean.yml b/.github/workflows/diskclean.yml
new file mode 100644
index 0000000..124dc99
--- /dev/null
+++ b/.github/workflows/diskclean.yml
@@ -0,0 +1,31 @@
+name: diskclean
+on:
+  workflow_dispatch:
+jobs:
+  ubuntu-diskclean:
+    # ubuntu-latest aka ubuntu-24.04 starts out with 2GB more free disk space than ubuntu-22.04
+    runs-on: ubuntu-latest
+    # runs-on: ubuntu-22.04
+    #container:
+      # image: aswf/ci-oiio:2026
+      # image: aswf/ci-common:6
+      # image: aswf/ci-common:4
+      # image: nvidia/cuda:12.9.1-runtime-rockylinux8
+      # options: -v /:/host/root
+    steps:
+       - name: disk space before cleanup
+         run: |
+           df -h /
+           # df -h /host/root
+       - name: Android NDK sizes
+         run : |
+           du -ksh /usr/local/lib/android/*
+       - name: clean up some stuff
+         run: |
+           sudo rm -rf /usr/share/dotnet \
+            /usr/local/lib/android \
+            /usr/local/.ghcup
+       - name: any more disk space after cleanup?
+         run: |
+           df -h /
+           # df -h /host/root
diff --git a/.github/workflows/gpu_test.yml b/.github/workflows/gpu_test.yml
new file mode 100644
index 0000000..103d92e
--- /dev/null
+++ b/.github/workflows/gpu_test.yml
@@ -0,0 +1,28 @@
+name: GPU_TEST
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+jobs:
+  ubuntu-gpu:
+    runs-on: ubuntu-20.04-gpu-6c-112g-336h-16vr
+    steps:
+      - name: Update APT repo for CUDA
+        run: |
+          cat /etc/apt/sources.list
+          ls -l /etc/apt/sources.list.d/
+          echo '#### cuda.list ####'
+          cat /etc/apt/sources.list.d/cuda.list
+          echo '#### cuda.list.save ####'
+          cat /etc/apt/sources.list.d/cuda.list.save
+          echo '#### nvidia-docker.list ####'
+          cat /etc/apt/sources.list.d/nvidia-docker.list
+          echo '### Get rid of cuda.list.save ###'
+          rm /etc/apt/sources.list.d/cuda.list.save
+          #sudo apt-key del 7fa2af80
+          #wget http://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/cuda-keyring_1.0-1_all.deb
+          #sudo dpkg -i cuda-keyring_1.0-1_all.deb
+          sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/3bf863cc.pub
+          time sudo apt-get update
+          sudo apt -y install libnpp-11-8