chore: run regression tests with epoll (#4426)

* chore: run regression tests with epoll

Signed-off-by: kostas <kostas@dragonflydb.io>

.github/actions/regression-tests/action.yml

@@ -28,6 +28,9 @@ inputs:
   s3-bucket:
     required: true
     type: string
+  epoll:
+    required: false
+    type: string
 
 runs:
   using: "composite"
@@ -46,7 +49,15 @@ runs:
         export DRAGONFLY_PATH="${GITHUB_WORKSPACE}/${{inputs.build-folder-name}}/${{inputs.dfly-executable}}"
         export UBSAN_OPTIONS=print_stacktrace=1:halt_on_error=1 # to crash on errors
 
-        timeout 50m pytest -m "${{inputs.filter}}" --durations=10 --timeout=300 --color=yes --json-report --json-report-file=report.json dragonfly --log-cli-level=INFO || code=$?
+        if [[ "${{inputs.epoll}}" == 'true' ]]; then
+          export FILTER="${{inputs.filter}} and not exclude_epoll"
+          # Run only replication tests with epoll
+          timeout 50m pytest -m "$FILTER" --durations=10 --timeout=300 --color=yes --json-report --json-report-file=report.json dragonfly --df force_epoll=true --log-cli-level=INFO || code=$?
+        else
+          export FILTER="${{inputs.filter}}"
+          # Run only replication tests with epoll
+          timeout 50m pytest -m "$FILTER" --durations=10 --timeout=300 --color=yes --json-report --json-report-file=report.json dragonfly --log-cli-level=INFO || code=$?
+        fi
 
         # timeout returns 124 if we exceeded the timeout duration
         if [[ $code -eq 124 ]]; then

.github/workflows/regression-tests.yml

@@ -11,8 +11,13 @@ jobs:
       matrix:
         # Test of these containers
         container: ["ubuntu-dev:20"]
+        proactor: [Uring, Epoll]
         build-type: [Debug, Release]
         runner: [ubuntu-latest, [self-hosted, linux, ARM64]]
+        exclude:
+          - proactor: Epoll
+            build-type: Debug
+
     runs-on: ${{ matrix.runner }}
 
     container:
@@ -31,6 +36,7 @@ jobs:
           cat /proc/cpuinfo
           ulimit -a
           env
+
       - name: Configure & Build
         run: |
           # -no-pie to disable address randomization so we could symbolize stacktraces
@@ -52,6 +58,9 @@ jobs:
           aws-access-key-id: ${{ secrets.AWS_S3_ACCESS_KEY }}
           aws-secret-access-key: ${{ secrets.AWS_S3_ACCESS_SECRET }}
           s3-bucket: ${{ secrets.S3_REGTEST_BUCKET }}
+          # Chain ternary oprator of the form (which can be nested)
+          # (expression == condition && <true expression> || <false expression>)
+          epoll: ${{ matrix.proactor == 'Epoll' && 'true' || '' }}
 
       - name: Upload logs on failure
         if: failure()