From: David Wells Date: Wed, 9 Nov 2016 23:54:09 +0000 (-0500) Subject: Add a specific exception for MPI failures. X-Git-Tag: v8.5.0-rc1~393^2~1 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2cc5ffb54ca8ca79175739055c5f777eda0a4692;p=dealii.git Add a specific exception for MPI failures. --- diff --git a/include/deal.II/base/exceptions.h b/include/deal.II/base/exceptions.h index 8649ee67fe..ae3e10f9c2 100644 --- a/include/deal.II/base/exceptions.h +++ b/include/deal.II/base/exceptions.h @@ -1082,6 +1082,40 @@ namespace StandardExceptions << arg1); #endif //@} + +#ifdef DEAL_II_WITH_MPI + /** + * Exception for MPI errors. This exception is only defined if + * deal.II is compiled with MPI support. This exception should + * be used with AssertThrow to check error codes of MPI + * functions. For example: + * @code + * const int ierr = MPI_Isend(...); + * AssertThrow(ierr == MPI_SUCCESS, ExcMPI(ierr)); + * @endcode + * or, using the convenience macro AssertThrowMPI, + * @code + * const int ierr = MPI_Irecv(...); + * AssertThrowMPI(ierr); + * @endcode + * + * If the assertion fails then the error code will be used to print a helpful + * message to the screen by utilizing the MPI_Error_string + * function. + * + * @ingroup Exceptions + * @author David Wells, 2016 + */ + class ExcMPI : public dealii::ExceptionBase + { + public: + ExcMPI (const int error_code); + + virtual void print_info (std::ostream &out) const; + + const int error_code; + }; +#endif // DEAL_II_WITH_MPI } /*namespace StandardExceptions*/ @@ -1149,6 +1183,20 @@ namespace StandardExceptions #define AssertIsFinite(number) Assert(dealii::numbers::is_finite(number), \ dealii::ExcNumberNotFinite(std::complex(number))) +#ifdef DEAL_II_WITH_MPI +/** + * An assertion that checks whether or not an error code returned by an MPI + * function is equal to MPI_SUCCESS. If the check fails then an + * exception of type ExcMPI is thrown with the given error code as an + * argument. + * + * @ingroup Exceptions + * @author David Wells, 2016 + */ +#define AssertThrowMPI(error_code) AssertThrow(error_code == MPI_SUCCESS, \ + dealii::ExcMPI(error_code)) +#endif // DEAL_II_WITH_MPI + #ifdef DEAL_II_WITH_CUDA /** * An assertion that checks that the error code produced by calling a CUDA diff --git a/source/base/exceptions.cc b/source/base/exceptions.cc index 865b2c9e5e..7f32809772 100644 --- a/source/base/exceptions.cc +++ b/source/base/exceptions.cc @@ -15,12 +15,19 @@ #include #include +#include +#include + #include #include #include #include #include +#ifdef DEAL_II_WITH_MPI +# include +#endif + #ifdef DEAL_II_HAVE_GLIBC_STACKTRACE # include #endif @@ -336,6 +343,58 @@ void ExceptionBase::generate_message () const +#ifdef DEAL_II_WITH_MPI +namespace StandardExceptions +{ + ExcMPI::ExcMPI (const int error_code) + : + error_code (error_code) + {} + + void ExcMPI::print_info (std::ostream &out) const + { + char error_name[MPI_MAX_ERROR_STRING]; + error_name[0] = '\0'; + int resulting_length = MPI_MAX_ERROR_STRING; + + // get the string name of the error code by first converting it to an error + // class. + int error_class = 0; + int ierr = MPI_Error_class (error_code, &error_class); + + // Check the output of the error printing functions. If either MPI function + // fails we should just print a less descriptive message. + bool error_name_known = ierr == MPI_SUCCESS; + if (error_name_known) + { + ierr = MPI_Error_string (error_class, error_name, &resulting_length); + error_name_known = error_name_known && (ierr == MPI_SUCCESS); + } + + out << "deal.II encountered an error while calling an MPI function." + << std::endl; + if (error_name_known) + { + out << "The description of the error provided by MPI is \"" + << error_name + << "\"." + << std::endl; + } + else + { + out << "This error code is not equal to any of the standard MPI error codes." + << std::endl; + } + out << "The numerical value of the original error code is " + << error_code + << "." + << std::endl; + } +} +#endif // DEAL_II_WITH_MPI + + + namespace deal_II_exceptions { namespace internals diff --git a/tests/base/mpi_exceptions.cc b/tests/base/mpi_exceptions.cc new file mode 100644 index 0000000000..61c1895ff0 --- /dev/null +++ b/tests/base/mpi_exceptions.cc @@ -0,0 +1,68 @@ +// --------------------------------------------------------------------- +// +// Copyright (C) 2016 by the deal.II authors +// +// This file is part of the deal.II library. +// +// The deal.II library is free software; you can use it, redistribute +// it, and/or modify it under the terms of the GNU Lesser General +// Public License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// The full text of the license can be found in the file LICENSE at +// the top level of the deal.II distribution. +// +// --------------------------------------------------------------------- + + +// Check that we can catch all MPI-1 error codes and print appropriate +// exception messages to the screen. + +#include "../tests.h" +#include +#include + +#include + +#include + +int main (int argc, char **argv) +{ + Utilities::MPI::MPI_InitFinalize mpi_initialization(argc, argv, 1); + + std::ofstream logfile("output"); + deallog.attach(logfile); + deallog.threshold_double(1.e-10); + + std::vector mpi_error_codes; + mpi_error_codes.push_back(MPI_ERR_BUFFER); + mpi_error_codes.push_back(MPI_ERR_COUNT); + mpi_error_codes.push_back(MPI_ERR_TYPE); + mpi_error_codes.push_back(MPI_ERR_TAG); + mpi_error_codes.push_back(MPI_ERR_COMM); + mpi_error_codes.push_back(MPI_ERR_RANK); + mpi_error_codes.push_back(MPI_ERR_REQUEST); + mpi_error_codes.push_back(MPI_ERR_ROOT); + mpi_error_codes.push_back(MPI_ERR_GROUP); + mpi_error_codes.push_back(MPI_ERR_OP); + mpi_error_codes.push_back(MPI_ERR_TOPOLOGY); + mpi_error_codes.push_back(MPI_ERR_UNKNOWN); + mpi_error_codes.push_back(MPI_ERR_OTHER); + mpi_error_codes.push_back(MPI_ERR_INTERN); + mpi_error_codes.push_back(MPI_ERR_LASTCODE); + + for (unsigned int i = 0; i < mpi_error_codes.size(); ++i) + { + try + { + throw ExcMPI(mpi_error_codes[i]); + } + catch (const ExceptionBase &exc) + { + deallog << exc.get_exc_name() << std::endl; + exc.print_info(deallog.get_file_stream()); + } + } + + + return 0; +} diff --git a/tests/base/mpi_exceptions.mpirun=1.output b/tests/base/mpi_exceptions.mpirun=1.output new file mode 100644 index 0000000000..dcd5592654 --- /dev/null +++ b/tests/base/mpi_exceptions.mpirun=1.output @@ -0,0 +1,61 @@ + +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_BUFFER: invalid buffer pointer". +The numerical value of the original error code is 1. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_COUNT: invalid count argument". +The numerical value of the original error code is 2. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_TYPE: invalid datatype". +The numerical value of the original error code is 3. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_TAG: invalid tag". +The numerical value of the original error code is 4. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_COMM: invalid communicator". +The numerical value of the original error code is 5. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_RANK: invalid rank". +The numerical value of the original error code is 6. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_REQUEST: invalid request". +The numerical value of the original error code is 7. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_ROOT: invalid root". +The numerical value of the original error code is 8. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_GROUP: invalid group". +The numerical value of the original error code is 9. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_OP: invalid reduce operation". +The numerical value of the original error code is 10. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_TOPOLOGY: invalid communicator topology". +The numerical value of the original error code is 11. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_UNKNOWN: unknown error". +The numerical value of the original error code is 14. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_OTHER: known error not in list". +The numerical value of the original error code is 16. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_INTERN: internal error". +The numerical value of the original error code is 17. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "MPI_ERR_UNKNOWN: unknown error". +The numerical value of the original error code is 92. diff --git a/tests/base/mpi_exceptions.mpirun=1.output.mpich b/tests/base/mpi_exceptions.mpirun=1.output.mpich new file mode 100644 index 0000000000..8da187c170 --- /dev/null +++ b/tests/base/mpi_exceptions.mpirun=1.output.mpich @@ -0,0 +1,61 @@ + +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid buffer pointer". +The numerical value of the original error code was 1. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid count". +The numerical value of the original error code was 2. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid datatype". +The numerical value of the original error code was 3. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid tag". +The numerical value of the original error code was 4. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid communicator". +The numerical value of the original error code was 5. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid rank". +The numerical value of the original error code was 6. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid MPI_Request". +The numerical value of the original error code was 19. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid root". +The numerical value of the original error code was 7. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid group". +The numerical value of the original error code was 8. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid MPI_Op". +The numerical value of the original error code was 9. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Invalid topology". +The numerical value of the original error code was 10. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Unknown error. Please file a bug report.". +The numerical value of the original error code was 13. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Other MPI error". +The numerical value of the original error code was 15. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Internal MPI error!". +The numerical value of the original error code was 16. +DEAL:: +deal.II encountered an error while calling an MPI function. +The description of the error provided by MPI is "Unknown error class". +The numerical value of the original error code was 1073741823.