Brian Beesley replies to my query...
> > Ok, then a question for the group at large... Anyone else running 2
> > instances of mprime on linux on any sort of dual PPro/P-II/P-III/Xeon
> > system? Using something along the lines of 2.2.13ish (This is a Redhat
> > 6.1 "SBE" edition).
>
> Yep. Two instances of mprime installed in seperate directories.
> System is dual PII-350 in a Supermicro P6DBS board running kernel
> 2.2.12-20smp (straight from the Red Hat 6.1 CD). As a matter of
> principle I run these under a normal user account, not root, and use
> "nice -n20" to control the job priority.
Ok, I have a single copy, using the -A2 flag on the second instance which
tells it to use xxxx0002.xxx for its config files... that *shouldn't*
matter? It seems to be auto-nicing itself now.
> > Anyone see Illegal Sumouts when they do things like
> > startx then stopx or maybe change display modes? For what its worth,
> > this particular system has a ATI Rage128 onboard and is using XF86_SVGA
> > 3.3.6.
>
> Nope. Starting/stopping/reconfiguring X has no effect except to make
> the mprime processes run more slowly. My system has an ATI Xpert@Work
> AGP graphics card. Basically I just installed X from the distribution
> CD (along with everything else), it seems to work fine ... BTW I now
> have Gnome installed but not KDE, this is the default for Red Hat
> distributions these days. Can't see that this should be a problem,
> though.
This is gnome too.
> A "top end" graphics card like the Rage128 is likely to use an
> interrupt for the graphics. This may interfere with any interrupt
> used by whatever you have in PCI slot 1 (or sometimes some of the
> higher PCI slots as well). Interference here might well cause
> problems which could manifest themselves as "illegal sumout". Try
> swapping around the PCI cards so that those that can't share
> interrupts don't have to do so. In fact, I find, as a rule of thumb,
> if you have an AGP graphics card installed then don't use PCI slot 1
> or any other PCI slot which shares an interrupt with AGP.
Um, this is a server class system. Has nothing in any of its PCI slots
except a lonely Intel EEPro 10/100 card which isn't even being used.
Everything else is on the motherboard (Adaptec 7880 ultra-narrow scsi,
Adaptec 7899 dual ultra-160-wide scsi, another Intel EEPro 10/100, ATI
Rage128, some kind of ESS sound chip which I don't even have configured).
> This advice applies wholly irrespective of operating system!
true. Although, I have had my home win98 system configured before where it
had a TON of stuff on a shared IRQ and never had any problems (for a while,
*everything* seemingly was on IRQ11, this included a 3C905, two different
Symbios SCSI cards, NVidia GeForce256 VGA, USB, and Aureal Vortex II 3D
sound card!).
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