From 2211424f27a4db11273b5def5f90ac8450bb319d Mon Sep 17 00:00:00 2001
From: Rudolf Weeber <weeber@icp.uni-stuttgart.de>
Date: Tue, 15 Oct 2024 10:57:18 +0200
Subject: [PATCH] Disable mpi process pinning in test suite

---
 CMakeLists.txt                  | 9 +++++++++
 testsuite/python/CMakeLists.txt | 3 ++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 06e29ace6f5..82ea4986284 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -421,6 +421,15 @@ else()
   endfunction()
 endif()
 
+# mpiexec argument to disable pinning of processes to cores. Used in test suite
+# as several tests are run at the same time.
+if(NOT APPLE)
+  set(ESPRESSO_MPIEXEC_DONT_PIN --bind-to none)
+else()
+  # not supported on Apple
+  set(ESPRESSO_MPIEXEC_DONT_PIN "")
+endif()
+
 #
 # Boost
 #
diff --git a/testsuite/python/CMakeLists.txt b/testsuite/python/CMakeLists.txt
index 2fa3fa7977a..21e639f0282 100644
--- a/testsuite/python/CMakeLists.txt
+++ b/testsuite/python/CMakeLists.txt
@@ -92,7 +92,8 @@ function(python_test)
     add_test(
       NAME ${TEST_NAME}
       COMMAND
-        ${MPIEXEC} ${ESPRESSO_MPIEXEC_OVERSUBSCRIBE} ${MPIEXEC_NUMPROC_FLAG}
+        ${MPIEXEC} ${ESPRESSO_MPIEXEC_DONT_PIN}
+        ${ESPRESSO_MPIEXEC_OVERSUBSCRIBE} ${MPIEXEC_NUMPROC_FLAG}
         ${TEST_NUM_PROC} ${MPIEXEC_PREFLAGS} ${ESPRESSO_MPIEXEC_TMPDIR}
         ${CMAKE_BINARY_DIR}/pypresso ${PYPRESSO_OPTIONS}
         ${TEST_FILE_CONFIGURED} ${TEST_ARGUMENTS} ${MPIEXEC_POSTFLAGS})