From 78f2974e321c677e207f2ff2c0006a3c9ac3dfbb Mon Sep 17 00:00:00 2001
From: Dominic Kempf <dominic.kempf@iwr.uni-heidelberg.de>
Date: Tue, 28 Nov 2017 09:53:04 +0100
Subject: [PATCH] Do not allow OpenBLAS/numpy to run multithreaded

---
 python/dune/perftool/__init__.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/python/dune/perftool/__init__.py b/python/dune/perftool/__init__.py
index d433436b..a8b87105 100644
--- a/python/dune/perftool/__init__.py
+++ b/python/dune/perftool/__init__.py
@@ -1,3 +1,8 @@
+# Disallow numpy to use multithreading - it breaks parallel code generation
+# on machines with large core count.
+import os
+os.environ["OMP_NUM_THREADS"] = 1
+
 # Trigger imports that involve monkey patching!
 import dune.perftool.loopy.symbolic
 
-- 
GitLab