Re: [Qemu-devel] [4600] variable dynamic translation buffer size

[Paul Brook]

On Wednesday 28 May 2008, Fabrice Bellard wrote:
> +        code_gen_buffer = mmap(NULL, code_gen_buffer_size,
> +                               PROT_WRITE | PROT_READ | PROT_EXEC,
> +                               flags, -1, 0);

I'd expect this to cause a significant performance regression on hosts that 
have limited branch range (i.e. everything except x86). The mmap region is 
almost never close to the application text segment, so all helper calls have 
to be indirect.

Paul