[Arm-netbook] Selecting the right Soc for out ARM Notebook project.

[Lauri Kasanen]

On Sun, 06 May 2012 15:20:34 +0100
Gordan Bobic <gordan at bobich.net> wrote:

> Yes, but most of those are synthetic benchmarks that are rather FP 
> heavy, such as rendering, AV encoding, etc.

Well, I do rendering monthly, encoding about weekly and compiling daily. So I wouldn't quite discount those benchmarks.

> In Apachebench it shows rough equivalence clock-for-clock (which puts 
> the A9 massively ahead in performance per watt), and 7z test shows them 
> to be about the same which puts A9 considerably ahead of the Atom 
> clock-for-clock.

Apache is a multiprocess test, so the A9 only got half the perf per clock?

1753/1600 = 1.09 hits/Mhz
1362/1200/2 = 0.56 hits/Mhz (dual core)

> It is also interesting that the Atom got soundly beaten by the A9 in the 
> OpenSSL RSA test. I wonder if this test is multi-threaded which would 
> clearly put the A9 at an advantage since N270 only has a single core. If 
> it isn't then that is quite embarrasing for the Atom.

It's single-threaded, IIRC.

- Lauri