Re: [Qemu-devel] [PATCH v4 4/9] target-ppc: improve lxvw4x implementation

[Richard Henderson]

On 09/28/2016 08:41 PM, Nikunj A Dadhania wrote:
> Without patch:
> ==============
> [tcg_test]$ time ../qemu/ppc64le-linux-user/qemu-ppc64le  -cpu POWER9 le_lxvw4x  
> >/dev/null
> real    0m2.812s
> user    0m2.792s
> sys     0m0.020s
> [tcg_test]$
>
> With patch:
> ===========
> [tcg_test]$ time ../qemu/ppc64le-linux-user/qemu-ppc64le  -cpu POWER9 le_lxvw4x  
> >/dev/null
> real    0m2.801s
> user    0m2.783s
> sys     0m0.018s
> [tcg_test]$
>
> Not much perceivable difference, is there a better way to benchmark?

There should be more of a difference for softmmu, since the tlb lookup for the 
memory is more expensive.


r~