Re: [Qemu-devel] qemu/hw mips_r4k.c

[Thiemo Seufer]

Fabrice Bellard wrote:
> CVSROOT:      /sources/qemu
> Module name:  qemu
> Branch:       
> Changes by:   Fabrice Bellard <address@hidden>        06/05/02 22:18:28
> 
> Modified files:
>       hw             : mips_r4k.c 
> 
> Log message:
>       performance boost (on P4 hosts at least, rdtsc is a _very_ bad random 
> generator)
> 
> CVSWeb URLs:
> http://cvs.savannah.gnu.org/viewcvs/qemu/qemu/hw/mips_r4k.c.diff?tr1=1.15&tr2=1.16&r1=text&r2=text

Does this really provide a measurable performance improvement?
Real hardware simply increments cp0_random together with the cycle
counter, this is randomized enough for TLB entry replacement.


Thiemo