on 2012-02-09 13:26 John Francis wrote
On Thu, Feb 09, 2012 at 01:09:02PM -0700, steve harley wrote:
my laptop does about 100,000 mips (without considering the GPU)
Are you sure you didn't add an order of magnitude there?
yes, i'm sure; it's a quad i7 (2820QM); i took my numbers from here:
<http://www.notebookcheck.net/Intel-Core-i7-2820QM-Notebook-Processor.40112.0.html>
this article doesn't have my exact CPU but does have some useful comparisons,
including the ARM11 and a few i7s:
<http://en.wikipedia.org/wiki/Million_instructions_per_second#Million_instructions_per_second>
Mind you, your main point - that a 400MHz processor is a bit underpowered -
is spot-on. My new cellphone, for example, has a two-core, 1GHz processor.
That's about 5x what Paul quoted for the in-car entertainment system. But
the car system also controls more important functions (keyless entry, for
one), so it has to be significantly more robust than one used in a phone,
where the worst that can happen would be a dropped call.
if i were making cars, i wouldn't have the infotainment system run any critical
functions
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