[Pw_forum] inter_pool_comm

[Dmitry Korotin]

Dear QE developers,
could anyone explain to me in a few words a difference between
inter_pool_comm and intra_pool_comm variables. I am not really
familiar with MPI, but I need to sum some variable over k-points.
Should I use mp_sum(variable_name,inter_pool_comm) or
mp_sum(variable_name,intra_pool_comm)?

Does mp_sum take into account k-point weights? (As I understood from
the source this routine is used for summation over k-points?)

Thank you in advance.
-- 
Best regards,
Dmitry Korotin

Ph. D. Student,
Institute of Metal Physics
S. Kovalevskaya, 18
620041 Ekaterinburg GSP-170
Russia