Kaiming Ouyang
2018-04-13 04:51:56 UTC
Hi all,
I am trying to test the bandwidth of intra-MPI send and recv. The code is
attached here. When I give the input 2048 (namely each process will send
and receive 2GB data), the program reported:
Read 2147479552, expected 2147483648, errno = 95
Read 2147479552, expected 2147483648, errno = 98
Read 2147479552, expected 2147483648, errno = 98
Read 2147479552, expected 2147483648, errno = 98
Does this mean Openmpi does not support the send and recv where data size
is larger than 2GB, or is there a bug in my code? Thank you.
I am trying to test the bandwidth of intra-MPI send and recv. The code is
attached here. When I give the input 2048 (namely each process will send
and receive 2GB data), the program reported:
Read 2147479552, expected 2147483648, errno = 95
Read 2147479552, expected 2147483648, errno = 98
Read 2147479552, expected 2147483648, errno = 98
Read 2147479552, expected 2147483648, errno = 98
Does this mean Openmpi does not support the send and recv where data size
is larger than 2GB, or is there a bug in my code? Thank you.