I'm wondering what's the correct way to define a custom struct datatype to be later used in a collective.
I'm my case I have structs defined as:
MyStruct{
float a;
float b;
int c;
};
that I would like to collect to the root using gatherv.
I know how to do this using plain MPI, but I'm wondering what's the process for mxx in order to avoid the error
static assertion failed: Type `T` is not a `trivial` type and is thus not supported for mxx send/recv operations. This type needs one of the following to be supported as trivial datatype: specialized build_datatype<T>, a member function `datatype`, or global function `make_datatype(Layout& l, T&)`
The error describes my options but I haven't been able to find examples of how to make mxx aware of custom datatypes.
Hello,
I'm wondering what's the correct way to define a custom struct datatype to be later used in a collective.
I'm my case I have structs defined as:
that I would like to collect to the root using
gatherv.I know how to do this using plain MPI, but I'm wondering what's the process for mxx in order to avoid the error
The error describes my options but I haven't been able to find examples of how to make mxx aware of custom datatypes.