diff --git a/.github/workflows/full-mpich.yml b/.github/workflows/full-mpich.yml
index 90f9fde7f..26b645da6 100644
--- a/.github/workflows/full-mpich.yml
+++ b/.github/workflows/full-mpich.yml
@@ -75,6 +75,9 @@ jobs:
           fi
           echo "staging-dir=${{ github.workspace }}/install_staging" >> $GITHUB_OUTPUT
 
+      - name: CPU info
+        run: lscpu
+
       - name: Extract PETSc and runner info
         id: petsc-info
         run: |
@@ -88,8 +91,8 @@ jobs:
         uses: actions/cache@v4
         with:
           path: |
-            ${{ steps.petsc-info.outputs.home }}/freefem/ff-petsc
-          key: petsc-${{ github.workflow }}-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}
+            ${{ env.INSTALL_DIR }}/ff-petsc
+          key: "petsc-Full version MPICH-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}"
 
       - name: Configure
         run: |
@@ -187,6 +190,9 @@ jobs:
       - name: Symlink gfortran
         run: ./etc/actions/macos/link_fortran.sh "$(uname -p)"
 
+      - name: CPU info
+        run: system_profiler SPHardwareDataType
+
       - name: Extract PETSc and runner info
         id: petsc-info
         run: |
@@ -201,7 +207,7 @@ jobs:
         with:
           path: |
             ${{ steps.petsc-info.outputs.home }}/freefem/ff-petsc
-          key: petsc-${{ github.workflow }}-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}
+          key: "petsc-Full version MPICH-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}"
 
       - name: Configure
         run: |
diff --git a/.github/workflows/full-msmpi.yml b/.github/workflows/full-msmpi.yml
index 92e3d51d2..5043d96c4 100644
--- a/.github/workflows/full-msmpi.yml
+++ b/.github/workflows/full-msmpi.yml
@@ -105,6 +105,10 @@ jobs:
             echo "configure-flags=--enable-optim --enable-generic" >> $GITHUB_OUTPUT
           fi
 
+      - name: CPU info
+        shell: pwsh
+        run: systeminfo
+
       - name: Extract PETSc and runner info
         id: petsc-info
         run: |
@@ -120,7 +124,7 @@ jobs:
         with:
           path: |
             ${{ steps.petsc-info.outputs.win_home }}/freefem/ff-petsc
-          key: petsc-${{ github.workflow }}-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}
+          key: "petsc-Full version MS-MPI-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}"
 
       - name: Configure
         run: |
diff --git a/.github/workflows/full-openmpi.yml b/.github/workflows/full-openmpi.yml
index 0f861756a..0afb02e20 100644
--- a/.github/workflows/full-openmpi.yml
+++ b/.github/workflows/full-openmpi.yml
@@ -72,6 +72,9 @@ jobs:
           fi
           echo "staging-dir=${{ github.workspace }}/install_staging" >> $GITHUB_OUTPUT
 
+      - name: CPU info
+        run: lscpu
+
       - name: Extract PETSc and runner info
         id: petsc-info
         run: |
@@ -85,8 +88,8 @@ jobs:
         uses: actions/cache@v4
         with:
           path: |
-            ${{ steps.petsc-info.outputs.home }}/freefem/ff-petsc
-          key: petsc-${{ github.workflow }}-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}
+            ${{ env.INSTALL_DIR }}/ff-petsc
+          key: "petsc-Full version Open MPI-${{ steps.petsc-info.outputs.image }}-${{ matrix.cfg.opts }}-${{ steps.petsc-info.outputs.version }}-${{ hashFiles('3rdparty/ff-petsc/Makefile') }}"
 
       - name: Configure
         run: |
diff --git a/.github/workflows/release_check.yml b/.github/workflows/release_check.yml
index 4ba487a1f..a6842438d 100644
--- a/.github/workflows/release_check.yml
+++ b/.github/workflows/release_check.yml
@@ -42,6 +42,9 @@ jobs:
     name: Ubuntu ${{ matrix.version }} - Check .deb
     runs-on: ubuntu-${{ matrix.version }}
     steps:
+      - name: CPU info
+        run: lscpu
+
       - uses: actions/checkout@v4
 
       - name: Download package
@@ -71,6 +74,9 @@ jobs:
         shell: pwsh
 
     steps:
+      - name: CPU info
+        run: systeminfo
+
       - name: Setup MPI
         uses: mpi4py/setup-mpi@v1
         with: