[Lguest] [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes

[Cyrill Gorcunov]

[H. Peter Anvin - Wed, Nov 05, 2008 at 10:20:23AM -0800]
| Cyrill Gorcunov wrote:
| > 
| > I see. Thanks! Btw Peter, I remember I read long time ago about
| > segment caches (well... in time of DOS programming actually). But
| > there was only 'common' words like this cache exist. But maybe
| > it's possible to know what exactly size of such a cache is?
| > You mentoined number 32. (heh... I hadn't remember it until
| > you mentoined about such a cache :-)
| > 
| 
| As with any other caching structure, you can discover its size,
| associativity, and replacement policy by artificially trying to provoke
| patterns that produce pathological timings.
| 
| At Transmeta, at one time we used a 32-entry direct-mapped cache, which
| ended up with a ~96% hit rate on common Win95 benchmarks.
| 
| I should, however, make it clear that there are other alternatives for
| speeding up segment descriptor loading, and not all of them rely on a cache.
| 
| 	-hpa
| 

Thanks a lot for explanation!

		- Cyrill -