[PATCH] powerpc: Keep track of emulated instructions

Kumar Gala galak at kernel.crashing.org
Sat Apr 4 01:15:44 EST 2009

On Apr 3, 2009, at 7:08 AM, Geert Uytterhoeven wrote:

> 	Hi Ben, Kumar,
> Finally (after ca. 1.5 years), he're an updated version of my patch  
> to keep
> track of emulated instructions.  In the light of Kumar's `Emulate  
> enough of SPE
> instructions to make gcc happy' patch, he probably also wants to  
> keep track of
> the actual runtime overhead.
> Changes since last version:
>  - arch/powerpc/kernel/sysfs.c is now compiled on ppc32, so we can  
> provide
>    counters in sysfs on ppc32, too,
>  - WARN_EMULATED() is a no-op if CONFIG_SYSCTL is disabled,
>  - Add warnings for altivec,
>  - Add warnings for recently introduced emulation of vsx and isel
>    instructions.

pretty cool.  Do we think counters should be sysfs or debugfs?

Also it would be nice to be able to zero out the counters.

- k

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