From d0f3d525d5dfb6cd7a2f5fe3be5a69c7ddc1306e Mon Sep 17 00:00:00 2001
From: Peter Boyle <paboyle@ph.ed.ac.uk>
Date: Fri, 25 Aug 2017 19:33:54 +0100
Subject: [PATCH] Optimal block size for KNL

---
 benchmarks/Benchmark_ITT.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/benchmarks/Benchmark_ITT.cc b/benchmarks/Benchmark_ITT.cc
index 2edae8d0..c0ce451f 100644
--- a/benchmarks/Benchmark_ITT.cc
+++ b/benchmarks/Benchmark_ITT.cc
@@ -679,8 +679,11 @@ int main (int argc, char ** argv)
   Grid_init(&argc,&argv);
 
   CartesianCommunicator::SetCommunicatorPolicy(CartesianCommunicator::CommunicatorPolicySequential);
+#ifdef KNL
+  LebesgueOrder::Block = std::vector<int>({8,2,2,2});
+#else
   LebesgueOrder::Block = std::vector<int>({2,2,2,2});
-
+#endif
   Benchmark::Decomposition();
 
   int do_memory=1;