Poster's Note: Forgot to cc: the linux-smp list.
"Dylan A. Loomis" wrote:
>
> I haven't been able to find a specific answers to some of these questions in
> the FAQ, so here goes. Will linux with SMP support:
>
> Running with:
> two (2) pentium II
> four (4) pentium II
> two (2) pentium III
> four (4) pentium III
> two (2) pentium II Xeon
> four (4) pentium II Xeon
> two (2) pentium III Xeon
> four (4) pentium III Xeon
> two (2) Alpha
>
> If not, is it a limitation of Linux or the processor?
>
>From my understanding, all of the above should be (are) supported.
> What I've seen _seems_ to suggest that all of the above should be supported
> but I'd like to know if anyone has this running? If you have any of the above
4xPPro-200 work on an AMD Goliath II. 4xPII(450) Xeon on an AMD MEGAPLEX I
do not. It has *two* IO-APICS. This seems to be the problem. It appears
that dual IO-APIC support is either broken (or was it left to develop for
2.3.xx?? Someone help me out please!!)
My vendor tells me that dual IO-APIC works on 2.2.7, but the EEPro netcard did
not -- sort of a catch 22.
[CORRECTION: 5/28 EEPro netcard DOES work -- configuration error here....]
For any developers out there that are interested, I will be pleased to
assist with this (rather unusual and $$$) mobo to help test fixes. I have DMESG
logs, etc. No IO-APIC table appears at boot time. (I have not used the
pirq=x,x,x,... command line....)
> running with linux-SMP and wouldn't be adverse to discussing your experience
> please contact me at [EMAIL PROTECTED], or post to this list.
>
> In addition I'd be interested to know what interface cards people have working,
> how much trouble they were to get working. Especially 100BT and Myrinet. Also
> large memory configs i.e. 1GB to 2GB of memory. The literature I've seen
> suggests that this is possible with minor kernel modifications.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2 files, 1 hex number changes in each file. I think there's a FAQ....
>
3C905 Vortex worked out of the box on 4xPPro-200.
I note here that MAD is coming out with Megaplex II, which has 7 slots
and a lower RAM capacity. Without any further info, I believe this
board would have a single IO-APIC, and should be usable at present...
I'd look at the mobo more than the processors. The megaplex has *12* PCI
slots and will hold 8 GB of RAM. This is a dead giveaway for a dual
IO-APIC machine. Basically, you get as many as 8 PCI slots per IO-APIC.
Any more than that, it probably (definitely) will not work with 2.2.9??????
I am making that statement empirically. If someone knows better, PLEASE
correct me! More than 4 CPU's also indicates a multi-IO-APIC configuration.
The drawings and explanations can be found at Intel's web site, and also
on ppg. 526 and 527 of "Pentium Pro and Pentium II System Architecture"
by Shanley in Mindshare Books.
I believe that the 8 processor mobo's that were recently announced must
also be using multi IO-APICS, and also probably won't work with 2.2.9
at this time.
> The intended application is a beowulf cluster running MPI.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> thanks in advance -DAL-
Our intention is the same....
--
*************************************
Paul Reich Motorola Inc.,
Staff Engineer Comm. Enterprise
(815-884-8082)
To the NSA: I know you're listening..
*************************************
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