Date: Fri, 23 Jul 1999 23:41:09 -0700 From: grady@xcf.berkeley.edu (Steven Grady) To: freebsd-smp@FreeBSD.ORG Subject: Re: slow network reading with SMP Message-ID: <19990724070810.8728514E0B@hub.freebsd.org> In-Reply-To: Your message of Fri, 23 Jul 1999 23:18:27 %2B0000 (GMT) <199907232318.QAA14623@usr09.primenet.com>
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Thanks for the reply.
> You should diff the dmesg output for both kernels.
The non-trivial diffs are approximately (for various reasons,
this is hand-typed...):
diff SMP.dmesg NOSMP.dmesg:
< CPU: Pentium III (686-class CPU)
> CPU: Pentium III (451.02-MHz 686-class CPU)
< Programming 24 pins in IOAPIC #0
< FreeBSD/SMP: Multiprocesor motherboard
< cpu0 (BSP): apic id: 0, version: 0x00040011, at 0xfee00000
< cpu1 (AP): apic id: 1, version: 0x00040011, at 0xfee00000
< io0 (APIC): apic id: 2, version: 0x00170011, at 0xfec00000
< pn0: <82c169 PNIC 10/100BaseTX> rev 0x21 int a irq 18 on pci0.13.0
> pn0: <82c169 PNIC 10/100BaseTX> rev 0x21 int a irq 9 on pci0.13.0
< ahc0: <Adaptec aic7890/91 Ultra2 SCSI adapter> rev 0x00 int a irq 16 on pci0.14.0
> ahc0: <Adaptec aic7890/91 Ultra2 SCSI adapter> rev 0x00 int a irq 10 on pci0.14.0
< vga0: <VGA-compatible display device> rev 0x01 int a irq 19 on pci0.20.0
> vga0: <VGA-compatible display device> rev 0x01 int a irq 11 on pci0.20.0
< APIC_IO: Testing 8254 interrupt delivery
< APIC_IO: routing 8254 via pin 2
< SMP: AP CPU #1 Launched!
Sadly, I know very little about SMP, so I don't understand why different
irq's are being used, but I assume that the difference is expected.
> Let us know it it is complaining about the clock not being
> routed via APIC. There is another configuration option (see
> LINT) that will let you fix this, if this is the case.
Doesn't look like it to me..
> There are also a number of BIOS settings that can effect the
> performance. Specifically, there are BIOS' where you can
> select an OS by name; I believe "UnixWare" works best on most
> of these, but I can't be specific as to what you should select
> to make the BIOS happy without detailed knowledge of your
> BIOS (if you obtain that, your in a better positition to decide,
> anyway).
It was hard to find the BIOS version. It's AMIBIOS, but I couldn't
find a version number -- the best I could find was the setup version,
which was R2.0. There are a _lot_ of options (like > 100), most of
them with cryptic abbreviations that seemed irrelevant. There was no
option for selecting an OS -- the closest were options about whether
the OS is Plug-And-Play compatible (I said yes), and whether it should
boot into OS/2 (I said no). If there are particular things I should
look for, I'd be more than glad to provide further information.
--
Steven
grady@xcf.berkeley.edu
"It's for you, McGruff!"
"Did you hear what he called me? I HATE that! Let's sneak
up to his room later and drain all the liquid out of his body."
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