[PATCH] powerpc: Instrument Hypervisor Calls

Mike Kravetz kravetz at us.ibm.com
Tue Aug 15 09:41:46 EST 2006

On Mon, Aug 14, 2006 at 04:35:12PM -0700, Geoff Levand wrote:
> Mike Kravetz wrote:
> > +config HCALL_STATS
> > +	bool "Hypervisor call instrumentation"
> > +	depends on PPC_PSERIES && DEBUG_FS
> > +	help
> > +	  Adds code to keep track of the number of hypervisor calls made and
> > +	  the amount of time spent in hypervisor calls: both wall time (based
> > +	  on time base) and cpu time (based on PURR).  A directory named
> > +	  hcall_inst is added at the root of the debugfs filesystem.
> Could we keep this more generic and not mention platform specific
> things like PURR?

Not sure if I follow.  PURR will be used/displayed if available.  Time
based statistics will always be available.

I can change the description to make this clear.  Or, are you asking
that this not be mentioned at all?  Based on previous discussions, I
added the ability to display both wall and cpu time if available.


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