[MPICH] Maximum message length

[Ashley Pittman]

On Thu, 2006-01-05 at 12:14 +0000, James S Perrin wrote:
> Hi,
> 	As the in Sends/Recvs message count is defined as an int (32bit) is the maximum 
> message count 2^31 or (2^31)/sizeof(datatype) ie the number of bytes is limited 
> to 2^31 ? Is this behaviour implementation specific?

This isn't quite right, the maximum count is 2^31 as you say but the
maximum message size if (2^31)*sizeof(datatype).  Given that a int is 4
bytes allows 8Gb transfers, if you want more just use a larger
datatypes.

Ashley,