On February 14, 2005 08:59 am, Brent Kilgore wrote: > Whoh cool, you can do that? Forgive me for asking, I'm sure you have a > good reason, but why? I can see having a netboot front end. Is it that > someone somewhere had a huge underutilized file server? (as I think of the > 2.8TB server upstairs doing nothing except humming and awaiting a "use"... > damn government budget rules :) )
Why? Because I wanted no fan/HDD noise in the family room. Now true, the XPC has two fans (power supply and processor) but both are temperature-controlled and once the thing's booted the fans never seem to come on, or if they are on, they're so quiet I don't mind. I did have to replace the ones that came iwth the XPC with better (quieter) ones but for $30 hell it's worth it. :-) > Ooh idea, not original I'm sure, where can I get a sub sub sub micro sized > netboot dumb terminal (cheap preferably)? I remember seeing one used in our > library that was about the size of a small laptop back when they had hopes > of controlling people's use of the internet. Sure but again, why use specialized hardware? Especially in a cash-strapped situation like a library or school. Look at LTSP, the Linux Terminal Server Project. Use any system that can boot PXE, or install any network card that has a boot ROM and is supported with Linux. I know of one company that has 50 systems (all off-lease Dell P2/266-ish systems) with cheapo RTL8139 cards with boot ROMs from etherboot.org. Works like a charm and the maintenance on the actual desktops are next to nil since everything is stored on the server. > But anyways, if you can run a bi-directional video stream over 100mbits/s > (I assume) Ethernet then the pci bus (127Mbytes/s?) should be bored to > death. Which brings be back to my conclusion of DMA sharing deadlock. The > motherboard/kernel getting confused on who is doing what with DMA and > thereby assuming someone still has a lock on the channel and not freeing > it. Until another packet of info knocks it back into order (the packet from > ssh) and things start flowing again. Well that sounds like a system problem and is beyond the scope of this discussion -- fix or replace your hardware, or figure out how to make Linux route around the braindead system issues. > I remember back from the DOS days you had to set a DMA and IRQ channel > manually. Does that still hold today? I know windows (and I suppose Linux > also) has the capability of sharing those DMA and IRQ channels. In windows > sometimes you have to override the IRQ. Would manually fiddling with the > DMA's help any? Or is this obsolete thinking? I'm not sure. I understand ISA DMA (which sucked) and I know a little about PCI DMA, but only enough to be dangerous. I have been learning from Paul Mundt (the linux-sh maintainer) but the education is slow and painful. :-) -A. ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ ivtv-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ivtv-devel
