Debugging | NVIDIA cuDNN

For initial debugging, we recommend turning on the cuDNN frontend logging and checking for warnings and errors. The cuDNN frontend API logging records the execution flow through the cuDNN frontend API. This functionality is disabled by default, and can be enabled through methods described in this section.

Debugging by Using Environment Variables

Environment Variables	`CUDNN_FRONTEND_LOG_INFO=0`	`CUDNN_FRONTEND_LOG_INFO=1`
`CUDNN_FRONTEND_LOG_FILE` not set	No Logging	No Logging
`CUDNN_FRONTEND_LOG_FILE` set to `stdout` or `stderr`	No Logging	Logging to `cout` or `cerr`
`CUDNN_FRONTEND_LOG_FILE` set to `filename.txt`	No Logging	Logging to the filename

Debugging by Using API Calls

Calling cudnn_frontend::isLoggingEnabled() = true|false has the same effect of setting the environment variable. Calling cudnn_frontend::getStream() = stream_name can be used to assign the output stream directly.

For further debugging, refer to the Error Reporting and API Logging to turn on the cuDNN backend logs.