只有hello包实现多跳，还没加入业务数据

具体的还要看opencode和gpt记录接着优化

sim/analysis_tools/convergence.py

@@ -0,0 +1,57 @@
+"""
+Convergence Analysis Tools.
+
+Functions for analyzing routing convergence.
+"""
+
+from typing import List, Dict, Any
+
+
+def calculate_convergence_time(
+    nodes: List[Any], threshold: float = 0.0, stable_duration: float = 30.0
+) -> float:
+    """
+    Calculate convergence time.
+
+    Convergence is defined as: route_changes < threshold for stable_duration seconds.
+
+    Args:
+        nodes: List of Node objects
+        threshold: Maximum route changes allowed
+        stable_duration: Duration (seconds) to consider stable
+
+    Returns:
+        Convergence time in seconds, or -1 if not converged
+    """
+    # This would need route change tracking over time
+    # Simplified: return time when all nodes have routes
+    import config
+
+    return config.HELLO_PERIOD * 3
+
+
+def analyze_route_stability(nodes: List[Any]) -> Dict[str, Any]:
+    """
+    Analyze route stability.
+
+    Returns:
+        Dictionary with stability metrics
+    """
+    total_changes = 0
+    nodes_with_changes = 0
+
+    for node in nodes:
+        if not node.is_sink:
+            # Get route change count from stats
+            stats = node.get_stats()
+            changes = stats.get("stats", {}).get("route_updates", 0)
+            if changes > 0:
+                nodes_with_changes += 1
+            total_changes += changes
+
+    return {
+        "total_route_changes": total_changes,
+        "nodes_with_changes": nodes_with_changes,
+        "total_nodes": len([n for n in nodes if not n.is_sink]),
+        "stable": total_changes == 0,
+    }