probe timer.profile registration error

[Frank Ch. Eigler]

Wenhua Zhang <shiziwen@gmail.com> writes:

> [...]
>  Pass 5: starting run.
>  ERROR: probe timer.profile registration error (rc -16)
> [...]

The timer.profile probe, in many kernel versions, is a
single-concurrent-user-only facility.  If there is already another
systemtap script or some other kernel user of the profiling timer
interrupt, then subsequent ones get the -EBUSY (-16) error.

You may be able to use the perf.sw.cpu_clock probe instead, which
has similar semantics but is shareable.  Replace the line
     probe timer.profile {
with
     probe perf.sw.cpu_clock !, timer.profile {
and your script should start to work better.

- FChE