From 3b135f665629c25fe64510591cb8709a8dac5bd9 Mon Sep 17 00:00:00 2001
From: Andre Sailer <andre.philippe.sailer@cern.ch>
Date: Fri, 20 Mar 2020 09:32:45 +0100
Subject: [PATCH] [CMake]: add DD4HEP_HIGH_MEM_POOL_DEPTH option
Allow setting of parallel builds of ddparser objects with the ninja generator
defaults to memory / 2000 cores (rounded down)
---
CMakeLists.txt | 7 +++++++
DDParsers/CMakeLists.txt | 6 ++++++
2 files changed, 13 insertions(+)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c9e4120c8..c5472e768 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,6 +61,10 @@ ENDIF()
###############################
# Define DD4hep build options #
###############################
+# NINJA ONLY
+# Limit number of parallel DDParser builds to number equal to 2 gigs per core
+cmake_host_system_information(RESULT HOST_RAM_MB QUERY TOTAL_PHYSICAL_MEMORY)
+math(EXPR DD4HEP_HIGH_MEM_POOL_DEPTH "${HOST_RAM_MB} / 2000" OUTPUT_FORMAT DECIMAL)
option(DD4HEP_USE_XERCESC "Enable 'Detector Builders' based on XercesC" OFF)
option(DD4HEP_USE_GEANT4 "Enable the simulation part based on Geant4" OFF)
@@ -81,7 +85,10 @@ OPTION(DD4HEP_BUILD_EXAMPLES "Build all the examples" OFF)
OPTION(DD4HEP_DEBUG_CMAKE "Print debugging information for DD4hep CMAKE" OFF)
SET(DD4HEP_USE_EXISTING_DD4HEP "" CACHE STRING "Build some parts of DD4hep against an existing installation")
+SET(DD4HEP_HIGH_MEM_POOL_DEPTH "${DD4HEP_HIGH_MEM_POOL_DEPTH}" CACHE STRING "Number of build slots for high memory compile units (DDParsers), Ninja only")
+# create the job pool
+set_property(GLOBAL PROPERTY JOB_POOLS HIGH_MEM_POOL=${DD4HEP_HIGH_MEM_POOL_DEPTH})
#####################
# Configure version #
#####################
diff --git a/DDParsers/CMakeLists.txt b/DDParsers/CMakeLists.txt
index cf4732084..01fc336c0 100644
--- a/DDParsers/CMakeLists.txt
+++ b/DDParsers/CMakeLists.txt
@@ -12,6 +12,10 @@
dd4hep_print("|++> Will build DDParsers")
+
+# set the default job pool to use, is unset below, although this only applies for this directory
+SET(CMAKE_JOB_POOL_COMPILE HIGH_MEM_POOL)
+
file(GLOB DDParsers_SOURCES src/Parsers/*.cpp src/Evaluator/*.cpp)
file(GLOB DDParsers_SPIRIT_SOURCES src/Spirit/*.cpp)
@@ -33,3 +37,5 @@ install(DIRECTORY include/Parsers include/Evaluator DESTINATION include)
install(TARGETS DDParsers ${OPTIONAL_TARGETS} EXPORT DD4hep
LIBRARY DESTINATION lib
ARCHIVE DESTINATION lib)
+# Unset job pool
+SET(CMAKE_JOB_POOL_COMPILE)
--
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