From ca127c818c52679f6449e07a9deb9e538ddc3e1c Mon Sep 17 00:00:00 2001
From: Luca Fedeli <luca.fedeli@cea.fr>
Date: Thu, 22 Jun 2023 17:52:37 +0200
Subject: Move MPIInitHelpers into ablastr (#4026)

* move MPIInitHelper into ablastr

* fix bug

* fix bug
---
 Source/Utils/MPIInitHelpers.cpp | 93 -----------------------------------------
 1 file changed, 93 deletions(-)
 delete mode 100644 Source/Utils/MPIInitHelpers.cpp

(limited to 'Source/Utils/MPIInitHelpers.cpp')

diff --git a/Source/Utils/MPIInitHelpers.cpp b/Source/Utils/MPIInitHelpers.cpp
deleted file mode 100644
index 9d205eb5f..000000000
--- a/Source/Utils/MPIInitHelpers.cpp
+++ /dev/null
@@ -1,93 +0,0 @@
-/* Copyright 2020 Axel Huebl
- *
- * This file is part of WarpX.
- *
- * License: BSD-3-Clause-LBNL
- */
-#include "MPIInitHelpers.H"
-
-#include <ablastr/warn_manager/WarnManager.H>
-
-#include <AMReX_Config.H>
-#include <AMReX_ParallelDescriptor.H>
-#include <AMReX_Print.H>
-
-#if defined(AMREX_USE_MPI)
-#   include <mpi.h>
-#endif
-
-#include <string>
-#include <utility>
-#include <sstream>
-
-namespace utils
-{
-    int
-    warpx_mpi_thread_required ()
-    {
-        int thread_required = -1;
-#ifdef AMREX_USE_MPI
-        thread_required = MPI_THREAD_SINGLE;  // equiv. to MPI_Init
-#   ifdef AMREX_USE_OMP
-        thread_required = MPI_THREAD_FUNNELED;
-#   endif
-#   ifdef AMREX_MPI_THREAD_MULTIPLE  // i.e. for async_io
-        thread_required = MPI_THREAD_MULTIPLE;
-#   endif
-#endif
-        return thread_required;
-    }
-
-    std::pair< int, int >
-    warpx_mpi_init (int argc, char* argv[])
-    {
-        const int thread_required = warpx_mpi_thread_required();
-#ifdef AMREX_USE_MPI
-        int thread_provided = -1;
-        MPI_Init_thread(&argc, &argv, thread_required, &thread_provided);
-#else
-        amrex::ignore_unused(argc, argv);
-        const int thread_provided = -1;
-#endif
-        return std::make_pair(thread_required, thread_provided);
-    }
-
-
-    void
-    warpx_mpi_finalize ()
-    {
-#ifdef AMREX_USE_MPI
-        MPI_Finalize();
-#endif
-    }
-
-    void
-    warpx_check_mpi_thread_level ()
-    {
-#ifdef AMREX_USE_MPI
-        const int thread_required = warpx_mpi_thread_required();
-        int thread_provided = -1;
-        MPI_Query_thread(&thread_provided);
-        auto mtn = amrex::ParallelDescriptor::mpi_level_to_string;
-
-        std::stringstream ss;
-        if( thread_provided < thread_required ){
-            ss << "WARNING: Provided MPI thread safety level ("
-                           << mtn(thread_provided) << ") is LOWER than requested "
-                           << mtn(thread_required) << "). This might lead to undefined "
-                           << "results in asynchronous operations (e.g. async_io).";
-            ablastr::warn_manager::WMRecordWarning(
-                    "MPI", ss.str(), ablastr::warn_manager::WarnPriority::high);
-        }
-        if( thread_provided > thread_required ){
-            ss << "NOTE: Provided MPI thread safety level ("
-                           << mtn(thread_provided) << ") is stricter than requested "
-                           << mtn(thread_required) << "). This might reduce multi-node "
-                           << "communication performance.";
-            ablastr::warn_manager::WMRecordWarning(
-                    "MPI", ss.str());
-        }
-#endif
-    }
-
-} // namespace utils
-- 
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