Newsgroups: comp.parallel.mpi From: "Umesh Kumar V. Rajasekaran" Subject: any difference in installing MPICH 1.1 in user space and kernel space Organization: ECECS Department, University of Cincinnati, http://www.ececs.uc.edu/ Date: Fri, 27 Feb 1998 12:08:14 -0500 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <34F6F2FE.7A89A381@ececs.uc.edu> Hi, I installed aMPICH version 1.1 on my linux box in the user space and I am using it. Does it make a difference if the system administrator installs it in the kernel space. What I mean by the difference is about the mpi message sending overhead, latency and things like that. I have this doubt, because, I measured the time taken for the routines to send packets using mpi in linux box(two processor Pentium Pro 166Mhz) and SUN machines sparc5. It was found that the time taken in linux box is almost 3 times of that in sparc5. and mpich is installed in the kernel in the SUN machines. I measured the time by sending like 10000 packets continuously from one machine to another machine of fixed size(128, 256 etc..) thanks, -- Umesh Kumar V. Rajasekaran Department of Electrical and Computer Science and Computer Engineering University of Cincinnati email: urajasek@ececs.uc.edu URL: http://www.ececs.uc.edu/~urajasek/