Re: [OMPI users] TCP Nagle algorithm and latency

2007-07-28 Thread Jeff Squyres
Sorry I previously missed this mail. I just recently added an MCA parameter to OMPI that allows enabling or disabling Nagle's algorithm on the TCP BTL (OMPI's lowest layer for MPI point-to-point communications for TCP). However, I'll tell you that some of the OMPI developers thought that t

[OMPI users] TCP Nagle algorithm and latency

2007-07-05 Thread Biagio Cosenza
Hi, I'm using Open MPI in a real time rendering system and I need an accurate latency control. consider the 'Nagle' optimization implemented in the TCP/IP protocol, which delays small packets for a short time period to possibly combine them with successive packets generating network friendly pack