GMAP
FT running problem on classD
I built and ran the FT program for the class D problem size, but the verification fails. The verification routine is failing because an overflow error is occurring with class D (int type is not large enough for this class). Would you please give me some help?
Hello. Thank you for using our NPB version and reporting this issue.
We have recently solved a similar issue in the IS benchmark (concerning the class D and overflow with int numbers).
A way to solve this is creating a macro that uses long type instead of int type when running the class D or larger.
A macro should be something like this:
#if CLASS == 'D'
typedef long INT_TYPE;
#else
typedef int INT_TYPE;
#endif
After that, you can replace the int type in the source code with that macro:
// using int type
int number;
// using the macro for class D
INT_TYPE number;
We will provide this update in the FT benchmark as soon as possible.
Additionally, since class D consumes a lot of memory, you should verify if your GPU has enough memory.
