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Best option for Xeon cache blocking set

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Peter Boyle
2017-06-30 10:53:22 +01:00
parent 7a788db3dc
commit b5a6e4f1fd
1 changed files with 4 additions and 1 deletions
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5
lib/stencil/Lebesgue.cc
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@@ -32,8 +32,11 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
namespace Grid { namespace Grid {
int LebesgueOrder::UseLebesgueOrder; int LebesgueOrder::UseLebesgueOrder;
#ifdef KNL
std::vector<int> LebesgueOrder::Block({8,2,2,2}); std::vector<int> LebesgueOrder::Block({8,2,2,2});
#else
std::vector<int> LebesgueOrder::Block({2,2,2,2});
#endif
LebesgueOrder::IndexInteger LebesgueOrder::alignup(IndexInteger n){ LebesgueOrder::IndexInteger LebesgueOrder::alignup(IndexInteger n){
n--; // 1000 0011 --> 1000 0010 n--; // 1000 0011 --> 1000 0010
n |= n >> 1; // 1000 0010 | 0100 0001 = 1100 0011 n |= n >> 1; // 1000 0010 | 0100 0001 = 1100 0011