Suppress NNPACK and Torch Profiler verbosity (#12633)

ultralytics/utils/__init__.py

@@ -102,13 +102,15 @@ HELP_MSG = """
     GitHub: https://github.com/ultralytics/ultralytics
     """
 
-# Settings
+# Settings and Environment Variables
 torch.set_printoptions(linewidth=320, precision=4, profile="default")
 np.set_printoptions(linewidth=320, formatter={"float_kind": "{:11.5g}".format})  # format short g, %precision=5
 cv2.setNumThreads(0)  # prevent OpenCV from multithreading (incompatible with PyTorch DataLoader)
 os.environ["NUMEXPR_MAX_THREADS"] = str(NUM_THREADS)  # NumExpr max threads
 os.environ["CUBLAS_WORKSPACE_CONFIG"] = ":4096:8"  # for deterministic training
 os.environ["TF_CPP_MIN_LOG_LEVEL"] = "2"  # suppress verbose TF compiler warnings in Colab
+os.environ["TORCH_CPP_LOG_LEVEL"] = "ERROR"  # suppress "NNPACK.cpp could not initialize NNPACK" warnings
+os.environ["KINETO_LOG_LEVEL"] = "5"  # suppress verbose PyTorch profiler output when computing FLOPs
 
 
 class TQDM(tqdm_original):