The MPS control daemon maintains a control.log file which contains the status of its MPS servers, user commands issued and their result, and startup and shutdown notices for the daemon. The MPS server maintains a server.log file containing its startup and shutdown information and the status of its clients.

By default these log files are stored in the directory /var/log/nvidia-mps. The CUDA_MPS_LOG_DIRECTORY environment variable can be used to override the default value. This environment variable should be set in the MPS control daemon’s environment and is automatically inherited by any MPS servers launched by that control daemon.