CarpetLib: Introduce gdata::allocated_memory_shape

Introduce a function gdata::allocated_memory_shape that determines from a given grid size how many grid points should be allocated. This allows adding padding to grid sizes, e.g. to improve cache performance.

Use this function when checking grid sizes.

1 files changed, 3 insertions, 2 deletions

diff --git a/Carpet/CarpetLib/src/interpolate_3d_4tl.cc b/Carpet/CarpetLib/src/interpolate_3d_4tl.cc
index c5d44ca82..0e5439893 100644
--- a/Carpet/CarpetLib/src/interpolate_3d_4tl.cc
+++ b/Carpet/CarpetLib/src/interpolate_3d_4tl.cc
@@ -8,6 +8,7 @@
 
 #include <loopcontrol.h>
 
+#include "gdata.hh"
 #include "operator_prototypes_3d.hh"
 #include "typeprops.hh"
 
@@ -72,8 +73,8 @@ namespace CarpetLib {
       CCTK_WARN (0, "Internal error: region extent is not contained in array extent");
     }
     
-    if (any (srcext != srcbbox.shape() / srcbbox.stride() or
-             dstext != dstbbox.shape() / dstbbox.stride()))
+    if (any (srcext != gdata::allocated_memory_shape(srcbbox.shape() / srcbbox.stride()) or
+             dstext != gdata::allocated_memory_shape(dstbbox.shape() / dstbbox.stride())))
     {
       CCTK_WARN (0, "Internal error: array sizes don't agree with bounding boxes");
     }