Re: [Discuss-gnuradio] Intel Atom Processor

[Tom Rondeau]

On Fri, Oct 8, 2010 at 2:54 PM, Marcus D. Leech <address@hidden> wrote:
> On 10/08/2010 02:46 PM, Sharif Shaher wrote:
>>  Hello,
>>
>> We are thinking of using a 1.6GHz Intel Atom processor based PC with
>> multiple gigabit Ethernet ports
>> to collect data from multiple USPR2s and save that data off to disk.
>> We are hoping to be able to
>> use decimation rates as low as 4 for captures of shorts (16bit I and
>> 16 bit Q).  We will be doing
>> nothing else on this PC, just capturing data.  So it will host ubuntu
>> and gnuradio.  Does anyone have
>> any idea if there is a throughput limit that we might be up against,
>> say for 2 USRP2s, say 4 USRP2s.
>> Has anyone successfully run gnuradio on an Atom?
>>
>> Thanks,
>> Sharif
>>
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>>
> I run Gnu Radio on an Atom D510 system for narrow-bandwidth radiometry.
>
> No way in heck are you going to be able to run at 25Msps for even a
> *single* USRP2, let alone multiple ones.
>  I tried a 25Msps usrp2_fft.py on my atom D510 system (which is
> dual-core at 1.6GHz), and it couldn't keep
>  up.
>
>
>
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org


I'm just going to parrot Marcus here. Nope, you are not going to be
able to handle that wide a bandwidth with an Atom.

I think the most I ever did was take in about 6 FM channels,
channelize them, and FM demod each, and save each to a file. That's
1.2 MHz of bandwidth there with some processing. My guess, you're
looking at 1.5 MHz of bandwidth with an upper limit on 2 MHz (and
that's if the gods favor you).

You might try to find a dual-core Atom, which still won't give you
what you want, but it will be better.

Tom