Add profile script

Author: j-rafique

profile_cascade.sh

@@ -0,0 +1,98 @@
+#!/bin/bash
+
+# Cascade Download Heap Profiling Script
+# Samples heap every 30 seconds during cascade downloads
+
+# Configuration - modify these as needed
+PROFILE_URL="http://localhost:6062/debug/pprof/heap"
+INTERVAL=30
+TIMESTAMP=$(date +%Y%m%d_%H%M%S)
+PROFILE_DIR="profiles_${TIMESTAMP}"
+
+# Allow override via command line
+if [ "$1" != "" ]; then
+    PROFILE_URL="$1"
+fi
+
+echo "=== Cascade Heap Profiling ==="
+echo "Profile URL: $PROFILE_URL"
+echo "Interval: ${INTERVAL}s"
+echo "Output Dir: $PROFILE_DIR"
+echo
+
+# Create profile directory
+mkdir -p "$PROFILE_DIR"
+cd "$PROFILE_DIR"
+
+# Test connection first
+echo "Testing connection to profiling server..."
+if ! curl -s --fail "$PROFILE_URL" > /dev/null; then
+    echo "ERROR: Cannot connect to profiling server at $PROFILE_URL"
+    echo "Make sure your supernode is running on testnet!"
+    exit 1
+fi
+
+echo "✓ Connected to profiling server"
+echo
+
+# Take baseline
+echo "Taking baseline heap snapshot..."
+curl -s -o "heap_00s.prof" "$PROFILE_URL"
+echo "✓ Baseline saved: heap_00s.prof"
+echo
+
+echo "*** NOW START YOUR CASCADE DOWNLOAD ***"
+echo "Press ENTER when download has started..."
+read
+
+echo "Starting heap profiling every ${INTERVAL}s..."
+echo "Press Ctrl+C to stop"
+echo
+
+# Counter for snapshots
+counter=1
+
+# Function to handle cleanup on exit
+cleanup() {
+    echo
+    echo "Profiling stopped. Taking final snapshot..."
+    final_elapsed=$((counter * INTERVAL))
+    curl -s -o "heap_${final_elapsed}s_final.prof" "$PROFILE_URL"
+
+    echo
+    echo "=== Profiling Complete ==="
+    echo "Location: $(pwd)"
+    echo "Files created:"
+    ls -la *.prof
+    echo
+    echo "Analysis commands:"
+    echo "# Compare baseline to final:"
+    echo "go tool pprof -http=:8080 -base heap_00s.prof heap_${final_elapsed}s_final.prof"
+    exit 0
+}
+
+# Set up signal handler
+trap cleanup INT TERM
+
+# Main profiling loop
+while true; do
+    sleep $INTERVAL
+
+    elapsed=$((counter * INTERVAL))
+    minutes=$((elapsed / 60))
+    seconds=$((elapsed % 60))
+
+    timestamp=$(date +%H:%M:%S)
+    filename="heap_${elapsed}s.prof"
+
+    echo "[$timestamp] Taking snapshot $counter (${minutes}m ${seconds}s elapsed)..."
+
+    if curl -s -o "$filename" "$PROFILE_URL"; then
+        size=$(ls -lh "$filename" | awk '{print $5}')
+        echo "✓ Saved: $filename ($size)"
+    else
+        echo "✗ Failed to get snapshot $counter"
+    fi
+
+    ((counter++))
+done