@mytec: iter3.7.0 start, gpu calc int

backend/app/main.py

@@ -1,4 +1,6 @@
-from contextlib import asynccontextmanager
+from contextlib import asynccontextmanager
+import logging
+import platform
 
 from fastapi import FastAPI, WebSocket
 from fastapi.middleware.cors import CORSMiddleware
@@ -7,9 +9,54 @@ from app.core.database import connect_to_mongo, close_mongo_connection
 from app.api.routes import health, projects, terrain, coverage, regions, system, gpu
 from app.api.websocket import websocket_endpoint
 
+logger = logging.getLogger("rfcp.startup")
+
+
+def check_gpu_availability():
+    """Log GPU status on startup for debugging."""
+    is_wsl = "microsoft" in platform.release().lower()
+    env_note = " (WSL2)" if is_wsl else ""
+
+    # Check CuPy / CUDA
+    try:
+        import cupy as cp
+        device_count = cp.cuda.runtime.getDeviceCount()
+        if device_count > 0:
+            props = cp.cuda.runtime.getDeviceProperties(0)
+            name = props["name"]
+            if isinstance(name, bytes):
+                name = name.decode()
+            mem_mb = props["totalGlobalMem"] // (1024 * 1024)
+            logger.info(f"GPU detected{env_note}: {name} ({mem_mb} MB VRAM)")
+            logger.info(f"CuPy {cp.__version__}, CUDA devices: {device_count}")
+        else:
+            logger.warning(f"CuPy installed but no CUDA devices found{env_note}")
+    except Exception as e:
+        logger.warning(f"CuPy FAILED {env_note}: {e}")
+        if is_wsl:
+            logger.warning("Install: pip3 install cupy-cuda12x --break-system-packages")
+        else:
+            logger.warning("Install: pip install cupy-cuda12x")
+    except Exception as e:
+        logger.warning(f"CuPy error{env_note}: {e}")
+
+    # Check PyOpenCL
+    try:
+        import pyopencl as cl
+        platforms = cl.get_platforms()
+        for p in platforms:
+            for d in p.get_devices():
+                logger.info(f"OpenCL device: {d.name.strip()}")
+    except Exception as e:
+        logger.debug("PyOpenCL not installed (optional)")
+    except Exception:
+        pass
+
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
+    # Log GPU status on startup
+    check_gpu_availability()
     await connect_to_mongo()
     yield
     await close_mongo_connection()