From owner-freebsd-questions  Thu Apr 15  2:35:11 1999
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Date: Thu, 15 Apr 1999 06:31:07 +0200
To: questions@freebsd.org
From: Gianmarco Giovannelli <gmarco@giovannelli.it>
Subject: smp kernel on asus dual P II
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Hello everyone, I have built a kernel for a 3.1-STABLE box with a couple of
PII 300.

I have used 2 keyword:
options         SMP                     # Symmetric MultiProcessor Kernel
options         APIC_IO                 # Symmetric (APIC) I/O

but I wonder what does these (found in LINT) mean ...

# Optional, these are the defaults plus 1:
options         NCPU=5                  # number of CPUs
options         NBUS=5                  # number of busses
options         NAPIC=2                 # number of IO APICs
options         NINTR=25                # number of INTs

NCPU is obviusly to set to 2, but the others ???
Are they needed or can improve performance ?

Here are some parts of my dmesg output:

Copyright (c) 1992-1999 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California. All rights reserved.
FreeBSD 3.1-STABLE #0: Thu Apr 15 08:21:21 CEST 1999
    gmarco@spock.masternet.it:/usr/src/sys/compile/SPOCK
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium II (686-class CPU)
  Origin = "GenuineIntel"  Id = 0x634  Stepping=4

Features=0x80fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,C
MOV,MMX>
real memory  = 201326592 (196608K bytes)
avail memory = 193294336 (188764K bytes)
Programming 24 pins in IOAPIC #0
FreeBSD/SMP: Multiprocessor motherboard
 cpu0 (BSP): apic id:  1, version: 0x00040011, at 0xfee00000
 cpu1 (AP):  apic id:  0, version: 0x00040011, at 0xfee00000
 io0 (APIC): apic id:  2, version: 0x00170011, at 0xfec00000
Preloaded elf kernel "kernel" at 0xf0255000.
Probing for devices on PCI bus 0:
chip0: <Host to PCI bridge (vendor=8086 device=7180)> rev 0x03 on pci0.0.0
chip1: <PCI to PCI bridge (vendor=8086 device=7181)> rev 0x03 on pci0.1.0
chip2: <Intel 82371AB PCI to ISA bridge> rev 0x01 on pci0.4.0
chip3: <Intel 82371AB Power management controller> rev 0x01 on pci0.4.3
[...]
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: routing 8254 via pin 2

The mainboard is the two processors  (PII) capable Austek without the scsi
onboard and with the LX chipset. I think is P297 etc etc

Thanks for your time.
Please cc. also to my email address because I can't read question right now...


Best Regards,
Gianmarco Giovannelli ,  "Unix expert since yesterday"
http://www.giovannelli.it/~gmarco  
http://www2.masternet.it 





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