Thanks for the advice, Jim. I appreciate it. I think I found a 1.1 GHz Pentium M (thanks to Matt) that can be cooled fanless. We're going to give either that board or a 1 GHz Celeron board from Kontron a try. I think "outrunning" is the way to go right now.
On Thu, 2006-04-20 at 13:38 -0500, Jim Hanlon wrote: > I tried to get the USRP talking to an 800MHz VIA fanless industrial control > computer, with expansion card to get USB 2.0 > performance. I found that gnuradio installed and ran OK, but USRP performance > consistently exhibited USB overruns and underruns, to > the point that our evaluation of USRP capabilities was limited by our compute > power. > > I think its nice to be fanless, if you can. And maybe, some clever > engineering of USB interrupt service routines could improve i/o > performance. But it is much simpler these days just to outrun the problem > with a faster CPU clock. > > If you are trapped by form factor and "no fan" rules, you may be out of luck. > Does your architecture allow for (say, USB) expansion > cards ? If so, you could build one that did block transfers to/from the USB > bus and your slowish CPU. > HTH > Jim Hanlon > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] > > g] On Behalf Of Lee Patton > > Sent: Tuesday, April 18, 2006 5:19 PM > > To: Eric Blossom > > Cc: Discuss gnuradio > > Subject: Re: [Discuss-gnuradio] Embedded control of USRP > > > > On Mon, 2006-04-03 at 11:20 -0700, Eric Blossom wrote: > > > ... unless you're a glutton for punishment, don't get the Celeron > > > version, spend the extra bucks and get the Pentium M. > > > > Besides the dearth of on-board cache, what are the other > > drawbacks of a Celeron? > > > > To fit the dimensional requirement I was given (5"x5"x~1"), > > the SBC must be passively cooled. However, I'm not finding a > > Pentium-M solution that can be passively cooled and meets our > > availability requirements. I have found a 600 MHz Celeron > > solution, but has half the L2 cache. > > > > In our application, we'll be pulling full throttle from the > > USRP, maybe FIR filtering, and then pushing back out to USRP. > > Not too heavy on the signal processing. > > > > All advice appreciated. > > > > - Lee > > > > P.S. > > > > Some potential solutions: > > http://www.gms4sbc.com/P60x_BO.html (can't meet availability) > > http://www.kontron-emea.com/index.php?id=82&cat=58 (JRex-PM, > > can only air cool Celeron M 600 MHz) > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
