----- "Mark Goodwin" <goodwinos@xxxxxxxxx> wrote:
> I'm not 100% sure, but I think the "SYS" entries in /proc/interrupts
> might have been something I added to SGI only kernels many years
> ago. This was an SGI-only patch for per-cpu system call counters.
> (IIRC, the patch was never posted because it needed changes on every
> arch).
Yep, looks right ...
$ pminfo -tT kernel.all.syscall
kernel.all.syscall [total system calls counter from /proc/interrupts]
Help:
This provides a counter (normally converted to a count/second)
of the total number of system calls executed across all CPUs.
A kernel patch is required for the instrumentation to use this metric
(contact markgw@xxxxxxx).
Good thing noone contacted you, else you would've had to scramble to
implement a new patch. :)
> Nathan and I just checked a few kernels, including as far back as
> the RHEL4 2.6.9 kernel and there's no sign of any SYS entries in
> /proc/interrupts, so unless someone else pipes up, I think this is
> probably dead code and we can nuke it.
cheers.
--
Nathan
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