Johnson9009 opened a new pull request, #15187: URL: https://github.com/apache/tvm/pull/15187
By using RPC server in NPU board, at some time a compiled model will hang the NPU, because of the buggy operator libraries of NPU toolchain, so we must to use the session_timeout to ensure the board resource can be released by the hang jobs. Currently the handling of session timeout error in RPC server is not good, it just kill the server loop sub process, then in the destructor of class `RPCEndpoint` will send the code of `kShutdown` to the RPC client, but the RPC client expect receive the code of `kReturn` or `kException`, so users will see the error message that like the one reported in https://github.com/apache/tvm/issues/15151, this error report will make users very confused and don't know what's happened. When using tuning to search a good schedule for operators, we only want to ignore the RPC session timeout error that indicate the schedule generated is an illegal one, but other error reported by the RPC server may help us find the potential bug of our tool chain built on top of TVM, so the RPC session timeout error should be split to a standalone TVM error class. This PR implemented these requirements by sending the RPC session timeout error message as a PRC server exception to the RPC client before kill the server loop sub process. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
