python-stress-test-research.py•4.33 kB
#!/usr/bin/env python3
"""
Research script for Python MCP stress testing
- How to spawn Node.js MCP servers from Python
- How to monitor process memory accurately
- How to communicate with MCP servers
- What memory patterns indicate leaks
"""
import subprocess
import time
import psutil
import json
import sys
def research_process_spawning():
"""Research: How to spawn and manage Node.js processes"""
print("=== Research: Process Spawning ===")
# Test basic subprocess spawn
try:
# Simple echo test
result = subprocess.run(['echo', 'test'], capture_output=True, text=True)
print(f"Basic subprocess works: {result.stdout.strip()}")
# Test with node
node_version = subprocess.run(['node', '--version'], capture_output=True, text=True)
print(f"Node.js available: {node_version.stdout.strip()}")
except Exception as e:
print(f"Error: {e}")
print()
def research_memory_monitoring():
"""Research: How to accurately measure process memory"""
print("=== Research: Memory Monitoring ===")
# Get current process info
process = psutil.Process()
# Different memory metrics
memory_info = process.memory_info()
print(f"RSS (Resident Set Size): {memory_info.rss / 1024 / 1024:.2f} MB")
print(f"VMS (Virtual Memory Size): {memory_info.vms / 1024 / 1024:.2f} MB")
# Memory percent
print(f"Memory percent: {process.memory_percent():.2f}%")
# Available on some systems
try:
memory_full = process.memory_full_info()
print(f"USS (Unique Set Size): {memory_full.uss / 1024 / 1024:.2f} MB")
print(f"PSS (Proportional Set Size): {memory_full.pss / 1024 / 1024:.2f} MB")
except AttributeError:
print("Full memory info not available on this system")
print()
def research_mcp_communication():
"""Research: How to communicate with MCP servers"""
print("=== Research: MCP Communication ===")
# MCP uses JSON-RPC over stdin/stdout
sample_request = {
"jsonrpc": "2.0",
"method": "tools/list",
"id": 1,
"params": {}
}
print(f"Sample MCP request: {json.dumps(sample_request, indent=2)}")
# Test if we can create proper JSON-RPC
print(f"Serialized for stdin: {json.dumps(sample_request)}")
print()
def research_memory_leak_patterns():
"""Research: What patterns indicate memory leaks"""
print("=== Research: Memory Leak Patterns ===")
print("Indicators of memory leaks:")
print("1. Continuous growth without plateau")
print("2. Memory not released after operations complete")
print("3. Growth rate proportional to request count")
print("4. No garbage collection recovery")
print("\nNormal patterns:")
print("1. Initial growth then stabilization")
print("2. Sawtooth pattern (allocate/GC cycles)")
print("3. Plateau after warm-up period")
print()
def research_subprocess_communication():
"""Research: How to communicate with subprocess stdin/stdout"""
print("=== Research: Subprocess Communication ===")
# Test echo with stdin
try:
proc = subprocess.Popen(
['cat'], # Simple echo back
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True
)
# Send data
stdout, stderr = proc.communicate(input="Hello from Python\n")
print(f"Echo test successful: {stdout.strip()}")
except Exception as e:
print(f"Communication error: {e}")
print()
def main():
print("Python MCP Stress Test Research")
print("=" * 40)
print()
research_process_spawning()
research_memory_monitoring()
research_mcp_communication()
research_memory_leak_patterns()
research_subprocess_communication()
# Check Python version
print(f"Python version: {sys.version}")
# Check required modules
print("\nRequired modules:")
for module in ['subprocess', 'psutil', 'json', 'time']:
try:
__import__(module)
print(f"✓ {module}")
except ImportError:
print(f"✗ {module} (needs installation)")
if __name__ == "__main__":
main()