Hello, On Thursday 01 April 2010 12:16:25 pm Oliver Geisler wrote: > Does anyone know a benchmark program, I could use for testing? There's an abundance of benchmarks (IMB, netpipe, SkaMPI...) and performance analysis tools (Scalasca, Vampir, Paraver, Opt, Jumpshot).
However, reading through your initial description on Tuesday, none of these fit: You want to actually measure the kernel time on TCP communication costs. So, have You tried attaching "strace -c -f -p PID" to the actual application processes? As a starter You may invoke the benchmark using: mpirun -np 4 strace -c -f ./benchmark (which however includes initialization and all other system calls)... Hope this helps. Best regards, Rainer -- ------------------------------------------------------------------------ Rainer Keller, PhD Tel: +1 (865) 241-6293 Oak Ridge National Lab Fax: +1 (865) 241-4811 PO Box 2008 MS 6164 Email: kel...@ornl.gov Oak Ridge, TN 37831-2008 AIM/Skype: rusraink
