By: Wilco (Wilco.Dijkstra.delete@this.ntlworld.com), March 5, 2015 3:28 pm
Room: Moderated Discussions
Hugo Décharnes (hdecharn.delete@this.outlook.fr) on March 5, 2015 3:40 pm wrote:
> I was very skeptical about the announcement that Cortex-A72 would deliver 85% more performance than Cortex-A57.
Maybe you misread what the announcement actually said - the slides are showing it very prominently: at the same power level. Ie. it's a gain made possible by a combination of process, power optimizations and micro architectural optimizations.
> That's more than Cortex-A57 versus Cortex-A15. (ARM Ltd. announced a “45% increase through incremental
> micro-architecture improvements”. However, regarding to their slides, Cortex-A57 is only 20% faster
> in AArch32 mode than Cortex-A15. The performance gain is not only due to “incremental micro-architecture
> improvements” (20%, not 45%), but also to the new ISA (20%). Marketing, again…)
A57 is definitely more than 20% faster at the same clock, as you can easily conclude from various benchmarks (eg. Geekbench shows 40% single threaded gain overall in AArch32 mode between Galaxy S5 and Galaxy S6 at the same clock).
> I'm waiting for benchmarks. We'll see if it fulfills its promises.
That will be soon given MediaTek announced a 2.4GHz A74 available late Q2.
Wilco
> I was very skeptical about the announcement that Cortex-A72 would deliver 85% more performance than Cortex-A57.
Maybe you misread what the announcement actually said - the slides are showing it very prominently: at the same power level. Ie. it's a gain made possible by a combination of process, power optimizations and micro architectural optimizations.
> That's more than Cortex-A57 versus Cortex-A15. (ARM Ltd. announced a “45% increase through incremental
> micro-architecture improvements”. However, regarding to their slides, Cortex-A57 is only 20% faster
> in AArch32 mode than Cortex-A15. The performance gain is not only due to “incremental micro-architecture
> improvements” (20%, not 45%), but also to the new ISA (20%). Marketing, again…)
A57 is definitely more than 20% faster at the same clock, as you can easily conclude from various benchmarks (eg. Geekbench shows 40% single threaded gain overall in AArch32 mode between Galaxy S5 and Galaxy S6 at the same clock).
> I'm waiting for benchmarks. We'll see if it fulfills its promises.
That will be soon given MediaTek announced a 2.4GHz A74 available late Q2.
Wilco
