test(ci): add Android e2e resource monitor

Snapshot host and guest loadavg during Detox runs, upload the log as
a CI artifact, and include it in flake-summary triage.

Author: mikehardy

.github/workflows/scripts/flake-summary.sh

@@ -29,6 +29,7 @@ DETOX_LOG="${RNFB_DETOX_LOG:-}"
   summarize "testing-log" "testing.log"
   summarize "springboard-log" "springboard-invertase.log"
   summarize "resource-monitor" "resource-monitor.log"
+  summarize "resource-monitor-android" "resource-monitor-android.log"
   summarize "metro-log" "metro.log"
 } >"$OUT"
 

.github/workflows/scripts/resource-monitor-android.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# Snapshot host and guest CPU/load during Android e2e runs.
+set -uo pipefail
+
+INTERVAL_SEC="${RNFB_RESOURCE_MONITOR_INTERVAL_SEC:-10}"
+LOG_FILE="${RNFB_RESOURCE_MONITOR_LOG:-resource-monitor-android.log}"
+ADB="${ANDROID_HOME:-${ANDROID_SDK_ROOT:-}}/platform-tools/adb"
+SERIAL="${ANDROID_SERIAL:-emulator-5554}"
+
+if [[ ! -x "$ADB" ]]; then
+  ADB="$(command -v adb || true)"
+fi
+
+echo "[resource-monitor-android] interval=${INTERVAL_SEC}s log=${LOG_FILE} serial=${SERIAL} pid=$$" >>"$LOG_FILE"
+
+while true; do
+  {
+    echo "=== $(date -u +%Y-%m-%dT%H:%M:%SZ) ==="
+    echo "--- host load ---"
+    uptime
+    echo "--- host top (pid pcpu pmem rss elapsed command) ---"
+    ps -eo pid,pcpu,pmem,rss,etime,cmd --sort=-pcpu 2>/dev/null | head -25 || true
+    echo "--- host e2e-related ---"
+    ps -eo pid,pcpu,pmem,rss,etime,cmd 2>/dev/null \
+      | grep -E 'qemu-system|adb |node |java |gradle|Metro' \
+      | grep -v grep || true
+    if [[ -n "$ADB" && -x "$ADB" ]]; then
+      echo "--- guest props ---"
+      "$ADB" -s "$SERIAL" shell getprop sys.boot_completed dev.bootcomplete 2>/dev/null || true
+      echo "--- guest load ---"
+      "$ADB" -s "$SERIAL" shell cat /proc/loadavg 2>/dev/null || true
+      "$ADB" -s "$SERIAL" shell uptime 2>/dev/null || true
+      echo "--- guest e2e-related ---"
+      "$ADB" -s "$SERIAL" shell ps -A -o PID,NAME,CPU 2>/dev/null \
+        | grep -E 'invertase|testing' \
+        | grep -v grep || true
+    fi
+    echo ""
+  } >>"$LOG_FILE" 2>&1
+  sleep "$INTERVAL_SEC"
+done

.github/workflows/tests_e2e_android.yml

@@ -269,7 +269,10 @@ jobs:
           script: |
             $ANDROID_HOME/platform-tools/adb devices
             nohup sh -c "$ANDROID_HOME/platform-tools/adb logcat '*:D' > adb-log.txt" &
+            chmod +x ./.github/workflows/scripts/resource-monitor-android.sh
+            nohup ./.github/workflows/scripts/resource-monitor-android.sh &
             yarn tests:android:test-cover --headless
+            pkill -f resource-monitor-android.sh || true
             yarn tests:android:post-e2e-coverage
 
       # https://github.com/codecov/codecov-action/releases
@@ -297,6 +300,13 @@ jobs:
           name: adb_logs_${{ matrix.api-level}}_${{ matrix.arch }}_${{ matrix.target }}_${{ matrix.iteration }}
           path: adb-*.txt
 
+      - name: Upload Android resource monitor log
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        if: always()
+        with:
+          name: resource-monitor-android-${{ matrix.api-level }}-${{ matrix.arch }}-${{ matrix.target }}-${{ matrix.iteration }}
+          path: resource-monitor-android.log
+
       - name: Upload Firebase emulator script logs
         # https://github.com/actions/upload-artifact/releases
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1