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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!elroy.jpl.nasa.gov!ames!sgi!odin!sgihub!eurohub!vaquero.neu.sgi.com!mannel
- From: mannel@vaquero.neu.sgi.com (Bill Mannel)
- Subject: Re: assiging vme ipl to cpu's on mp systems
- Message-ID: <1992Jul24.073035.8864@eurohub.neu.sgi.com>
- Sender: news@eurohub.neu.sgi.com (Net news)
- Nntp-Posting-Host: vaquero.neu.sgi.com
- Reply-To: mannel@vaquero.neu.sgi.com (Bill Mannel)
- Organization: Silicon Graphics S.A., Neuchatel, Switzerland
- References: <22525@hacgate.SCG.HAC.COM>
- Date: Fri, 24 Jul 1992 07:30:35 GMT
- Lines: 56
-
- In article <22525@hacgate.SCG.HAC.COM>, lee@luke.rsg.hac.com (C. Lee) writes:
- |> I remember seeing on our system a few months ago a file (don't
- |> remember the name) that assigned VME IPL numbers to specific cpu's in
- |> an mp system, and mentioned that the default for an unassigned IPL
- |> was cpu 0.
- |>
- |> I *thought* the file was somewhere in "/usr/sysgen/master.d", but
- |> I've looked thru the files there and in "/usr/sysgen/*" and can't
- |> find it. We haven't upgraded since I saw it, but it might have been
- |> "over modified" or accidently deleted, or I'm overlooking it or
- |> looking in the wrong places.
- |>
- |> Does anyone know the name and location of the file?
- |>
- |> Thanks.
-
-
- The IPL directives are placed in the file /usr/sysgen/system.
-
- On an MP machine, with 4.0+, there's a default arrangement of IPL
- directives, with the intent of spreading the interrupts around among
- various processors, for more efficient interrupt handling.
-
-
-
- Here's the default arrangement for a 440 SkyWriter on 4.0.1, if you
- want to recreate (same arrangement on a 340 VGXT on 4.0.5):
-
-
-
- *
- *
- * Tie a VME IPL level to a processor. The default is 0.
- * If the specified processor does not exist at run time,
- * the kernel will default to processor 0.
- * IPL: level cpu#
- *
- * level 0 is local intr on IO2 which is SCSI and ENET so it must go to
- * the network processor
- IPL: 0 1
- * level 4 is for networking device
- IPL: 4 1
- * level 8 is SCSI 0 on IO3
- IPL: 8 2
- * level 9 is SCSI 1 on IO3
- IPL: 9 3
- * level 10 is local ENET on IO3
- IPL: 10 1
- *
-
-
- You won't see this default arrangement on a PI or an Indigo's
- /usr/sysgen/system, since these machines can not be MP (however,
- single-processor Power Series machines still have the default
- arrangement, but all the levels default to proc 0, as they must).
-
-