Roger that, its not double, however its "probably good enough" I do believe
that the new dual core processors have seperate 2MB caches....so all the
better.
The P4 I run with the 2MB cache and the refresh of the pan adapter window
over 30 FPS only makes the unit sit around 15% cpu utilization. So Im
guessing these machines could handle it.
73
Mike - KM0T
www.km0t.com
----- Original Message -----
From: "Jim Lux" <[EMAIL PROTECTED]>
To: "Mike King - KM0T" <[EMAIL PROTECTED]>; "'FlexRadio Mailing List'"
<FlexRadio@flex-radio.biz>
Sent: Friday, February 03, 2006 4:44 PM
Subject: Re: [Flexradio] Repost - Multiple SDRS one CPU
At 12:04 PM 2/3/2006, Mike King - KM0T wrote:
Boy, this would be great for real estate space. A Pent 4 3.4 GHz with a
gig
of ram should have no problems...especially a HyperThread chip, PowerSDR
on
each thread?
HT doesn't necessarily give you twice the throughput. In many systems,
it's the memory bandwidth that limits you. I believe that both CPU cores
share the same Level 1 cache, so if your application is anywhere near 50%
utilization, HT might not buy you much. Makes context switches real fast
though, and allows clever pipelining schemes (speculative execution of
both branches, for instance).
You can go hit the beowulf archives (http://www.beowulf.org/) for a lot of
discussion about the value (or not) of HT in highly compute bound
applications.
James Lux, P.E.
Spacecraft Radio Frequency Subsystems Group
Flight Communications Systems Section
Jet Propulsion Laboratory, Mail Stop 161-213
4800 Oak Grove Drive
Pasadena CA 91109
tel: (818)354-2075
fax: (818)393-6875
