Ronald Maas (rmaas.delete@this.wiwo.nl) on February 3, 2015 8:23 pm wrote:
> Hugo Décharnes (hdecharn.delete@this.outlook.fr) on February 3, 2015 2:20 pm wrote:
> > Cortex-A57 delivers better performances than Cortex-A15, though their micro-architectures
> > are–nearly–identical. We'll see if ARM Ltd. reiterates with Cortex-A72.
>
> ARM's own web page about Cortex-A72 mentions 'major micro-architectural improvements'. This
> implies that the micro-architecture will be different compared to the Cortex-A15/A57.
>
> So guys. Any ideas what ARM could have do to make such an impressive performance
> improvement compared to A57? My pick (entirely speculative of cause):
>
> - 4 instruction decoder
> - memory disambiguation
> - 2 x 128-bit NEON execution units
>
> Ronald

Most likely:

- repipelined for ~30% higher frequency target
- more simd
- wider memory bus
- nothing else