Re: [Qemu-devel] Re: IO_MEM_NB_ENTRIES limit

[Paul Brook]

On Sunday 11 May 2008, Fabrice Bellard wrote:
> andrzej zaborowski wrote:
> > [...]
> > Here are some benchmark results:
>
> Benchmarks measuring the boot time mainly measure the dynamic
> translation time, so they are not much meaningful. It would be better to
> launch say nbench or a compilation with gcc.

Once you hit userspace (particularly things like udev) you do a lot of TLB 
thrashing, which can show interesting things about the TLB invalidation/slow 
path performance.

I agree things like nbench tend to be a good test of the TLB fast path.

Paul