On 3/8/07, Nils Faerber <[EMAIL PROTECTED]> wrote:
Pierre Hébert schrieb:
> It doesn't seem so bad : my [EMAIL PROTECTED] shows 199bogomips, so at
> 200MHz 100bogomips seems correct (s3c2440 has the same cpu as s3c2410).
> I don't know if the bogomips indication is a value in which we can really
> trust, these little devices are really efficient even at
> 100/200bogomips.
The bogomips result is a little different depending on the core
architecture. So for the Samsung CPU bogomips ~= 1/2 MHz.
OK, good to know!
A PXA270 I have on my desk has the ~ 1:1 bogomips to MHz mapping...
I guess this depends on how many cycles the __delay(loops_per_jiffy) loop
ENTRY(__delay)
subs r0, r0, 1
bhi __delay
mov pc,lr
takes on the given cpu.
On the S3C2440 subs takes 1S and bhi takes 2S+1N cycles.
Is information about the PXA27x instruction cycle times available somewhere?
regards
Philipp
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