[EMAIL PROTECTED] wrote:
>
> Ralph Smeets wrote:
>
> > > has run for 3h33m CPU time. The total for ALL the other
> > processes is about 3
> > > minutes.
> >
> > Hmm,
> >
> > what are you doing on that machine?
>
> As little as possible ? Reading/writing endless MD emails ?
Hmm, I've got a UltraSparc II @ 450Mhz with 1GB of memory to do that... (They've
changed my IBM PowerPC AIX machine for a Ultra 60 + FlatPanel 18.1" TFT
display!)
> > to. Add to that that most 'deamons' (little programs that
> > are loaded into memory
> > during the start-up of Windows) need more memory than the
> > Linux equivalent.
> >
> > OS overhead is a real problem in this case.
>
> I agree that OS's can have a considerable MEMORY overhead, and if you don't
> have enough, this can then affect the speed if you get into swapping, but an
> ATRAC algorithm would have a small working set (demand for memory), so I
> wouldn't expect the OS to make a big impact. I'm not intending to digress
> into a Linux/Windoze comparison. Yes, you need to buy enough memory to
> satisfy the demands of your OS to run the programs you want.
It depends. ATRAC works in small packets of several micro-seconds (11.6 ms long,
1.45 ms in the high frequency band and 2.9 ms in the others). With the ATRAC
DSP, you can have a micro-controller put the data into memory and another or the
same micro-controller can take it out of memory and write it to disc. On the PC,
it's not only the ATRAC algorithm that's running, but also writing a packet of
data received by the soundcard to memory, and writing this data back to disc.
And we all know how well PCs handle this (hint, Digital Audio Extraction and
real time burning of a CD-R.).
> > Ralph -> are we still on-topic?
>
> Barely; I suppose we're spinning around the feasability of executing ATRAC
> on a PC. Rat had suggested that a PC is 600 times too slow. I don't think
> that is the case.
I don't think PCs are 600 times too slow. If you've read my other mails, you can
see that I think it's possible with current PCs that are well configured.
Cheers,
Ralph -> The fact remains that real-time ATRAC compression on a PC will remain
more difficult to achieve than using an ATRAC dedicated DSP!
--
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Ralph Smeets Functional Verification Centre Of Competence - CMG
Voice: (+33) (0)4 76 58 44 46 STMicroelectronics
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Mobile: (+33) (0)6 82 66 62 70 38240 MEYLAN
E-Mail: [EMAIL PROTECTED] FRANCE
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"For many years, mankind lived just like the animals. And then
something happened that unleashed the powers of our imagination:
We learned to talk."
-- Stephen Hawking, later used by Pink Floyd --
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