On Mon, 12 Nov 2007, Ashley Pittman wrote:

> Typically with parallel applications you launch many copies of the same
> program with the same command line parameters, the MPI implementation
> itself numbers the processes from 0 to N-1 given N processes, this is
> known as the MPI "rank" of a process.  Most job schedulers used for
> launching parallel jobs export the rank as a environment variable so any
> wrapper script, such as valgrind, can use this to name log files et al.
>
> Not having this in cachegrind frequently causes problems, I don't think
> cachegrind supports --log-file-exactly currently which means I can't
> even use a wrapper shell script to deference the variable.

$QUAL support has been added in the trunk, although it's inconsistent at the 
moment (i.e. the naming scheme is inconsistent).  It'll be fixed for 3.3.0.

N

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