update

.gitignore

@@ -0,0 +1,5 @@
+*.csv
+plots/
+bin/
+__pycache__/
+.DS_Store

README.md

@@ -23,12 +23,13 @@ Deploy the `server/` directory to the Ground Station machine.
 Deploy the `client/` directory to the Drone machine.
 ```bash
 # Blasts framed payloads to the ground station.
-# You can specify the scheduler, the duration in seconds, and the payload size in bytes.
+# You can specify the scheduler, the duration in seconds, the message size, and an optional chunk size.
 ./client/scripts/run.sh \
     --addr <GROUND_STATION_IP>:4242 \
     --scheduler minrtt \
     --duration 30 \
-    --payload-size 2048
+    --message-size 2048 \
+    --chunk-size 512
 ```
 
 ### Analyzing the Results

analysis/visualize.py

@@ -1,7 +1,8 @@
 #!/usr/bin/env python3
 """MP-QUIC Application & eBPF Results Visualizer.
 
-This script takes the CSV outputs and plots their latency distributions and timelines.
+This script takes the CSV outputs and plots their latency distributions and timelines,
+with advanced network statistics.
 
 Usage:
     python visualize.py --app ../server/app_metrics.csv
@@ -13,6 +14,7 @@ import pandas as pd
 import matplotlib.pyplot as plt
 import seaborn as sns
 import os
+import numpy as np
 
 def load_ebpf_data(csv_path, label):
     if not os.path.exists(csv_path):
@@ -24,7 +26,7 @@ def load_ebpf_data(csv_path, label):
     df = df.sort_values('timestamp')
     if not df.empty:
         first_event_time = df['timestamp'].iloc[0]
-        df['rel_time'] = df['timestamp'] - first_event_time
+        df['rel_time'] = (df['timestamp'] - first_event_time) / 1e9
     else:
         df['rel_time'] = 0.0
     df['value_us'] = df['value_ns'] / 1000.0
@@ -41,41 +43,98 @@ def plot_app_metrics(csv_path, output_dir):
         print("App metrics file is empty.")
         return
 
-    df = df.sort_values('sequence_number')
+    # Sort by message ID and then chunk index
+    df = df.sort_values(['message_id', 'chunk_index'])
     
-    # Calculate Jitter and Rel Latency
+    # Calculate Latency
     df['latency_ms'] = df['latency_ns'] / 1000000.0
     
+    # Calculate Jitter (absolute difference between consecutive latencies)
+    df['jitter_ms'] = df['latency_ms'].diff().abs()
+    
     # Relative time from first packet received
     df['rel_time'] = (df['ground_recv_time'] - df['ground_recv_time'].min()) / 1e9
 
-    plt.figure(figsize=(10, 5))
-    sns.scatterplot(x='rel_time', y='latency_ms', data=df, s=15, alpha=0.6)
-    plt.title('App-Level End-to-End Latency Over Time (Glass-to-Glass)')
-    plt.ylabel('Relative Latency (ms)')
-    plt.xlabel('Time (s)')
-    out_path = os.path.join(output_dir, 'app_latency_timeline.png')
-    plt.savefig(out_path, dpi=300, bbox_inches='tight')
+    # Plot 1: Latency and Jitter Over Time
+    fig, ax1 = plt.subplots(figsize=(12, 6))
+    
+    sns.scatterplot(x='rel_time', y='latency_ms', data=df, s=30, alpha=0.5, color='#1f77b4', label='Latency (ms)', ax=ax1, edgecolor='none')
+    
+    # Rolling average latency
+    df['rolling_latency'] = df['latency_ms'].rolling(window=20, min_periods=1).mean()
+    sns.lineplot(x='rel_time', y='rolling_latency', data=df, color='#d62728', linewidth=2.5, label='Moving Avg Latency', ax=ax1)
+
+    ax1.set_title('App-Level Network Performance: Latency & Jitter Over Time', fontsize=16, fontweight='bold', pad=20)
+    ax1.set_ylabel('Latency (ms)', fontsize=13, fontweight='bold')
+    ax1.set_xlabel('Time (s)', fontsize=13, fontweight='bold')
+    ax1.grid(True, linestyle='--', alpha=0.7)
+
+    # Add Jitter on a secondary y-axis
+    ax2 = ax1.twinx()
+    sns.lineplot(x='rel_time', y='jitter_ms', data=df, color='#2ca02c', alpha=0.4, linewidth=1.5, label='Jitter (ms)', ax=ax2)
+    ax2.set_ylabel('Jitter (ms)', fontsize=13, fontweight='bold', color='#2ca02c')
+    ax2.tick_params(axis='y', labelcolor='#2ca02c')
+
+    # Combine legends
+    lines_1, labels_1 = ax1.get_legend_handles_labels()
+    lines_2, labels_2 = ax2.get_legend_handles_labels()
+    ax1.legend(lines_1 + lines_2, labels_1 + labels_2, loc='upper left', frameon=True, shadow=True)
+
+    out_path_timeline = os.path.join(output_dir, 'app_performance_timeline.png')
+    plt.tight_layout()
+    plt.savefig(out_path_timeline, dpi=300, bbox_inches='tight')
     plt.close()
     
-    # Packet Loss Calculation
-    max_seq = df['sequence_number'].max()
-    min_seq = df['sequence_number'].min()
-    expected_packets = max_seq - min_seq + 1
-    received_packets = len(df)
-    lost_packets = expected_packets - received_packets
-    reliability = (received_packets / expected_packets) * 100 if expected_packets > 0 else 0
-
-    print("\n" + "=" * 55)
-    print("  🏆 APP-LEVEL RELIABILITY (Drone -> Ground)")
-    print("=" * 55)
-    print(f"  Packets Sent (Expected): {expected_packets}")
-    print(f"  Packets Received:        {received_packets}")
-    print(f"  Packets Lost:            {lost_packets}")
-    print(f"  Reliability:             {reliability:.5f}%")
-    print("=" * 55)
+    # Plot 2: Latency CDF
+    plt.figure(figsize=(9, 6))
+    sns.ecdfplot(data=df, x='latency_ms', color='#9467bd', linewidth=3)
+    plt.title('CDF of End-to-End App Latency', fontsize=16, fontweight='bold', pad=20)
+    plt.xlabel('Latency (ms)', fontsize=13, fontweight='bold')
+    plt.ylabel('Cumulative Probability', fontsize=13, fontweight='bold')
+    plt.grid(True, linestyle='--', alpha=0.7)
     
-    print(f"Saved app-level plot to {out_path}")
+    # Mark percentiles
+    p50, p90, p95, p99 = df['latency_ms'].quantile([0.5, 0.9, 0.95, 0.99])
+    plt.axvline(p50, color='r', linestyle=':', linewidth=2, label=f'P50: {p50:.2f} ms')
+    plt.axvline(p90, color='orange', linestyle=':', linewidth=2, label=f'P90: {p90:.2f} ms')
+    plt.axvline(p99, color='green', linestyle=':', linewidth=2, label=f'P99: {p99:.2f} ms')
+    plt.legend(frameon=True, shadow=True, fontsize=11)
+    
+    out_path_cdf = os.path.join(output_dir, 'app_latency_cdf.png')
+    plt.tight_layout()
+    plt.savefig(out_path_cdf, dpi=300, bbox_inches='tight')
+    plt.close()
+
+    # Packet Loss Calculation with Chunking Support
+    max_msg = df['message_id'].max()
+    min_msg = df['message_id'].min()
+    expected_messages = max_msg - min_msg + 1
+    
+    chunks_per_msg = df['total_chunks'].max() if 'total_chunks' in df.columns else 1
+    expected_chunks = expected_messages * chunks_per_msg
+    
+    received_chunks = len(df)
+    lost_chunks = expected_chunks - received_chunks
+    reliability = (received_chunks / expected_chunks) * 100 if expected_chunks > 0 else 0
+
+    print("\n" + "=" * 60)
+    print("  📊 APP-LEVEL NETWORK STATISTICS (Drone -> Ground)")
+    print("=" * 60)
+    print(f"  Messages Sent (Expected): {expected_messages}")
+    print(f"  Chunks Sent (Expected):  {expected_chunks}")
+    print(f"  Chunks Received:         {received_chunks}")
+    print(f"  Chunks Lost:             {lost_chunks}")
+    print(f"  Reliability:             {reliability:.5f}%")
+    print("-" * 60)
+    print(f"  Latency P50 (Median):    {p50:.2f} ms")
+    print(f"  Latency P90:             {p90:.2f} ms")
+    print(f"  Latency P95:             {p95:.2f} ms")
+    print(f"  Latency P99 (Tail):      {p99:.2f} ms")
+    print(f"  Avg Jitter:              {df['jitter_ms'].mean():.2f} ms")
+    print("=" * 60)
+    
+    print(f"Saved app-level timeline plot to {out_path_timeline}")
+    print(f"Saved app-level CDF plot to {out_path_cdf}")
 
 
 def plot_latency_distributions(df, output_dir):
@@ -83,13 +142,20 @@ def plot_latency_distributions(df, output_dir):
     if latency_df.empty: return
 
     plt.figure(figsize=(10, 6))
-    sns.violinplot(x='event_type', y='value_us', hue='node', data=latency_df, split=True, inner="quartile")
+    
+    # Use a custom color palette
+    palette = {"Client": "#4C72B0", "Server": "#C44E52"}
+    
+    sns.boxplot(x='event_type', y='value_us', hue='node', data=latency_df, palette=palette, showfliers=False, width=0.6)
     plt.yscale('log')
-    plt.title('Kernel Network Stack Latency Distribution (Log Scale)')
-    plt.ylabel('Latency (µs)')
-    plt.xlabel('Event Type')
+    plt.title('Kernel Network Stack Latency Distribution', fontsize=16, fontweight='bold', pad=20)
+    plt.ylabel('Latency (µs) [Log Scale]', fontsize=13, fontweight='bold')
+    plt.xlabel('Event Type', fontsize=13, fontweight='bold')
+    plt.grid(True, axis='y', linestyle='--', alpha=0.7)
+    plt.legend(title='Node', title_fontsize='13', fontsize='11', frameon=True, shadow=True)
     
     out_path = os.path.join(output_dir, 'kernel_latency_distribution.png')
+    plt.tight_layout()
     plt.savefig(out_path, dpi=300, bbox_inches='tight')
     plt.close()
     print(f"Saved kernel distribution plot to {out_path}")
@@ -98,17 +164,22 @@ def plot_latency_timeline(df, output_dir):
     latency_df = df[df['event_type'].isin(['SEND_LATENCY', 'RECV_LATENCY'])]
     if latency_df.empty: return
 
-    g = sns.FacetGrid(latency_df, col="event_type", row="node", margin_titles=True, height=4, aspect=2)
-    g.map(sns.scatterplot, "rel_time", "value_us", alpha=0.5, s=10)
+    # Group by Event Type and Node
+    g = sns.FacetGrid(latency_df, col="event_type", row="node", margin_titles=True, height=4.5, aspect=2, sharey=False)
+    
+    # Scatter plot with reduced opacity for density
+    g.map(sns.scatterplot, "rel_time", "value_us", alpha=0.5, s=25, color="#55A868", edgecolor='none')
     g.set_axis_labels("Time (s)", "Latency (µs)")
-    g.set_titles(col_template="{col_name}", row_template="{row_name}")
+    g.set_titles(col_template="{col_name}", row_template="{row_name}", size=14, weight='bold')
     
     for ax in g.axes.flat:
         ax.set_yscale('log')
+        ax.grid(True, linestyle=':', alpha=0.7)
         
-    g.fig.suptitle('Kernel Latency Over Time', y=1.02)
+    g.fig.suptitle('Kernel Latency Over Time (Log Scale)', y=1.05, fontsize=18, fontweight='bold')
     
     out_path = os.path.join(output_dir, 'kernel_latency_timeline.png')
+    plt.tight_layout()
     plt.savefig(out_path, dpi=300, bbox_inches='tight')
     plt.close()
     print(f"Saved kernel timeline plot to {out_path}")
@@ -122,6 +193,9 @@ def main():
     args = parser.parse_args()
 
     os.makedirs(args.outdir, exist_ok=True)
+    
+    # Set global aesthetic for seaborn
+    sns.set_theme(style="whitegrid", context="notebook", font_scale=1.1)
 
     if args.app:
         plot_app_metrics(args.app, args.outdir)
@@ -134,11 +208,10 @@ def main():
         
     if dfs:
         df = pd.concat(dfs, ignore_index=True)
-        sns.set_theme(style="whitegrid")
         plot_latency_distributions(df, args.outdir)
         plot_latency_timeline(df, args.outdir)
         
-    print("\nVisualization complete! Check the '{}' directory.".format(args.outdir))
+    print(f"\n✅ Visualization complete! Beautiful plots generated in '{args.outdir}' directory.")
 
 if __name__ == "__main__":
     main()

client/main.go

@@ -19,7 +19,8 @@ func main() {
 	listScheds := flag.Bool("list-schedulers", false, "List available schedulers")
 	addr := flag.String("addr", "127.0.0.1:4242", "Server address")
 	duration := flag.Int("duration", 10, "Duration in seconds")
-	payloadSize := flag.Int("payload-size", 1024, "Size of the payload in bytes (min 20)")
+	messageSize := flag.Int("message-size", 1024, "Size of the full application message in bytes (min 36)")
+	chunkSize := flag.Int("chunk-size", 0, "Chunk size. If > 0, splits message-size into multiple chunks (min 36)")
 	flag.Parse()
 
 	if *listScheds {
@@ -30,8 +31,8 @@ func main() {
 		return
 	}
 
-	if *payloadSize < 20 {
-		*payloadSize = 20 // 4 bytes length, 8 bytes seq, 8 bytes timestamp
+	if *messageSize < 36 {
+		*messageSize = 36 // 4 len + 8 seq + 8 ts + 8 chunk_idx + 8 tot_chunks
 	}
 
 	tlsConf := &tls.Config{
@@ -60,37 +61,52 @@ func main() {
 		log.Fatal(err)
 	}
 
-	fmt.Printf("Stream opened, sending data for %d seconds (Payload Size: %d bytes)...\n", *duration, *payloadSize)
+	fmt.Printf("Stream opened, sending data for %d seconds (Message Size: %d bytes, Chunk Size: %d)...\n", *duration, *messageSize, *chunkSize)
 
 	end := time.Now().Add(time.Duration(*duration) * time.Second)
-	payload := make([]byte, *payloadSize)
 	
-	// Frame structure:
-	// [0:4] uint32 Total Length
-	// [4:12] uint64 Sequence Number
-	// [12:20] uint64 Send Timestamp (nanoseconds)
-	// [20:] Padding (dummy data)
-	binary.BigEndian.PutUint32(payload[0:4], uint32(*payloadSize))
-
-	var seqNum uint64 = 0
+	var msgId uint64 = 0
 	totalBytes := 0
+	totalChunksSent := 0
+	
+	actualChunkSize := *messageSize
+	if *chunkSize > 36 && *chunkSize <= *messageSize {
+		actualChunkSize = *chunkSize
+	}
+
+	totalChunks := uint64((*messageSize + actualChunkSize - 1) / actualChunkSize)
 	
-	// Target sending rate: we don't want to lock the CPU entirely in a busy loop.
-	// We yield slightly to allow the network stack to process.
-	// But to measure max throughput we just send as fast as stream.Write allows.
 	for time.Now().Before(end) {
-		seqNum++
+		msgId++
 		sendTime := uint64(time.Now().UnixNano())
 		
-		binary.BigEndian.PutUint64(payload[4:12], seqNum)
-		binary.BigEndian.PutUint64(payload[12:20], sendTime)
+		bytesLeft := *messageSize
 		
-		n, err := stream.Write(payload)
-		if err != nil {
-			log.Fatal("Stream write error:", err)
+		for chunkIdx := uint64(0); chunkIdx < totalChunks; chunkIdx++ {
+			currentLength := actualChunkSize
+			if bytesLeft < actualChunkSize {
+				currentLength = bytesLeft
+			}
+			if currentLength < 36 {
+				currentLength = 36
+			}
+			
+			payload := make([]byte, currentLength)
+			binary.BigEndian.PutUint32(payload[0:4], uint32(currentLength))
+			binary.BigEndian.PutUint64(payload[4:12], msgId)
+			binary.BigEndian.PutUint64(payload[12:20], sendTime)
+			binary.BigEndian.PutUint64(payload[20:28], chunkIdx)
+			binary.BigEndian.PutUint64(payload[28:36], totalChunks)
+
+			n, err := stream.Write(payload)
+			if err != nil {
+				log.Fatal("Stream write error:", err)
+			}
+			totalBytes += n
+			bytesLeft -= currentLength
+			totalChunksSent++
 		}
-		totalBytes += n
 	}
 	
-	fmt.Printf("Finished sending %d packets, %d bytes (%.2f MB)\n", seqNum, totalBytes, float64(totalBytes)/1024/1024)
+	fmt.Printf("Finished sending %d messages (%d chunks), %d bytes (%.2f MB)\n", msgId, totalChunksSent, totalBytes, float64(totalBytes)/1024/1024)
 }

server/main.go

@@ -68,7 +68,7 @@ func main() {
 	defer f.Close()
 
 	writer := csv.NewWriter(f)
-	writer.Write([]string{"sequence_number", "drone_send_time", "ground_recv_time", "latency_ns", "bytes_received"})
+	writer.Write([]string{"message_id", "chunk_index", "total_chunks", "drone_send_time", "ground_recv_time", "latency_ns", "bytes_received"})
 	writer.Flush()
 
 	// Mutex to protect CSV writer if multiple streams are used
@@ -99,7 +99,7 @@ func main() {
 						}
 						
 						length := binary.BigEndian.Uint32(header)
-						if length < 20 {
+						if length < 36 {
 							fmt.Printf("Warning: Invalid frame length %d\n", length)
 							continue
 						}
@@ -114,20 +114,24 @@ func main() {
 						
 						recvTime := time.Now().UnixNano()
 						
-						seqNum := binary.BigEndian.Uint64(payload[0:8])
+						msgId := binary.BigEndian.Uint64(payload[0:8])
 						sendTime := binary.BigEndian.Uint64(payload[8:16])
+						chunkIdx := binary.BigEndian.Uint64(payload[16:24])
+						totalChunks := binary.BigEndian.Uint64(payload[24:32])
 						latency := recvTime - int64(sendTime)
 						
 						mu.Lock()
 						writer.Write([]string{
-							strconv.FormatUint(seqNum, 10),
+							strconv.FormatUint(msgId, 10),
+							strconv.FormatUint(chunkIdx, 10),
+							strconv.FormatUint(totalChunks, 10),
 							strconv.FormatUint(sendTime, 10),
 							strconv.FormatInt(recvTime, 10),
 							strconv.FormatInt(latency, 10),
 							strconv.FormatUint(uint64(length), 10),
 						})
 						// Periodically flush? 
-						if seqNum % 1000 == 0 {
+						if msgId % 1000 == 0 {
 							writer.Flush()
 						}
 						mu.Unlock()