Move jemalloc LD_PRELOAD to be set during environment activation (#39869)

Get #39860 into ornl-next

Author: rosswhitfield

buildconfig/CMake/LinuxPackageScripts.cmake

@@ -121,6 +121,17 @@ configure_file(
 # Needs to be executable
 execute_process(COMMAND "chmod" "+x" "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/AddPythonPath.py" OUTPUT_QUIET ERROR_QUIET)
 
+if(MANTID_FRAMEWORK_LIB STREQUAL "BUILD")
+  configure_file(
+    ${CMAKE_MODULE_PATH}/Packaging/activate_mantid.sh.in ${CMAKE_BINARY_DIR}/etc/conda/activate.d/mantid.sh @ONLY
+  )
+  configure_file(
+    ${CMAKE_MODULE_PATH}/Packaging/deactivate_mantid.sh.in ${CMAKE_BINARY_DIR}/etc/conda/deactivate.d/mantid.sh @ONLY
+  )
+  install(FILES ${CMAKE_BINARY_DIR}/etc/conda/activate.d/mantid.sh DESTINATION ${ETC_DIR}/conda/activate.d)
+  install(FILES ${CMAKE_BINARY_DIR}/etc/conda/deactivate.d/mantid.sh DESTINATION ${ETC_DIR}/conda/deactivate.d)
+endif()
+
 # Package version
 unset(PYTHON_ARGS)
 

buildconfig/CMake/Packaging/activate_mantid.sh.in

@@ -0,0 +1,2 @@
+@JEMALLOC_DEFINITIONS@
+export LD_PRELOAD=${LOCAL_PRELOAD}

buildconfig/CMake/Packaging/deactivate_mantid.sh.in

@@ -0,0 +1 @@
+unset LD_PRELOAD

conda/recipes/mantiddocs/build.sh

@@ -7,7 +7,9 @@ bash "${parent_dir}"/archive_env_logs.sh "$BUILD_PREFIX" "$PREFIX" 'mantiddocs'
 mkdir -p build
 cd build
 
-cmake \
+# unset LD_PRELOAD as this causes cmake to segfault
+LD_PRELOAD="" \
+  cmake \
   ${CMAKE_ARGS} \
   -DCMAKE_BUILD_TYPE=Release \
   -DCMAKE_PREFIX_PATH=$PREFIX \

conda/recipes/mantidqt/build.sh

@@ -7,7 +7,9 @@ bash "${parent_dir}"/archive_env_logs.sh "$BUILD_PREFIX" "$PREFIX" 'mantidqt'
 mkdir -p build
 cd build
 
-cmake \
+# unset LD_PRELOAD as this causes cmake to segfault
+LD_PRELOAD="" \
+  cmake \
   ${CMAKE_ARGS} \
   -DCMAKE_BUILD_TYPE=Release \
   -DCMAKE_PREFIX_PATH=$PREFIX \

conda/recipes/mantidworkbench/build.sh

@@ -8,7 +8,9 @@ bash "${parent_dir}"/archive_env_logs.sh "$BUILD_PREFIX" "$PREFIX" 'mantidworkbe
 mkdir -p build
 cd build
 
-cmake \
+# unset LD_PRELOAD as this causes cmake to segfault
+LD_PRELOAD="" \
+  cmake \
   ${CMAKE_ARGS} \
   -DCMAKE_BUILD_TYPE=Release \
   -DCMAKE_PREFIX_PATH=$PREFIX \

docs/source/release/v6.14.0/Framework/Algorithms/New_features/39860.rst

@@ -0,0 +1 @@
+- ``jemalloc`` has been add to the conda activation/deactivation scripts to enable use when running just ``python``. Previously it was only applied in the workbench startup script. This should improve the performance of many algorithms.