CDO

Dear Developers,

I'm trying to use "-P" option of the command cdo to map a netcdf file
to a higher resolution on a linux cluster machine (centos os), for example:
cdo -P 16 remapbil,r360x180 infile.nc outfile.nc
However, it seems to me that cdo is not being executed using 16 cpus/nodes,
but only 5 or so cpus even though 46 cpus/nodes are availble and nothing
else is running on the same machine.

My question is whether cdo and netcdf need to be compiled using
mpigcc/mpigxx, etc, rather than just gcc/g++, etc., to make -P option work.

Thanks,
UK