Make mpi cholesky use a default 240x240 tile size instead of 256

mpi/examples/matrix_decomposition/mpi_decomposition_params.c

@@ -1,6 +1,6 @@
 /* StarPU --- Runtime system for heterogeneous multicore architectures.
  *
- * Copyright (C) 2009, 2010  Université de Bordeaux
+ * Copyright (C) 2009, 2010, 2015  Université de Bordeaux
  * Copyright (C) 2010, 2011, 2012, 2013, 2015  CNRS
  *
  * StarPU is free software; you can redistribute it and/or modify
@@ -26,7 +26,7 @@ unsigned size = 4*64;
 unsigned nblocks = 2;
 unsigned nbigblocks = 2;
 #else
-unsigned size = 4*1024;
+unsigned size = 4*960;
 unsigned nblocks = 16;
 unsigned nbigblocks = 2;
 #endif