Re: [OMPI users] Hooks for Collective's sync/transfer activity?

2009-08-12 Thread Eugene Loh
Manfred Muecke wrote: I would like to understand in more detail how much time some collective communication calls really spend waiting for the last process to enter. I know this can be done by logging entry times for each process, but I wonder if there is a better and more efficient way. "Bette

Re: [OMPI users] Hooks for Collective's sync/transfer activity?

2009-08-12 Thread Rainer Keller
Hello Manfred, this is more a MPI-Standardization question, Open MPI happens to be (the only?) one implementation providing Peruse, While there are people using Peruse event tracing to collect information on collectives in Open MPI, however, these are not in trunk. The specification itself has n

[OMPI users] Hooks for Collective's sync/transfer activity?

2009-08-12 Thread Manfred Muecke
Hello *, I would like to understand in more detail how much time some collective communication calls really spend waiting for the last process to enter. I know this can be done by logging entry times for each process, but I wonder if there is a better and more efficient way. The peruse interface