[Linux-ia64] perfmon usage?

I've looked at the perfmon.c in the arch/ia64/kernel directory of the
kernel source. Not beeing a kernel expert I suspect that this is or will
be a syscall called 'perfmonctl'.

Is there any tool available to play around with the performance counters
by using this syscall?

Thanks in advance for the help,

Erich Focht
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NEC European Supercomputer Systems, European HPC Technology Center