Re: Multiprocessor support

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Sep 05, 2007 at 07:39:39PM +0300, Andreas Gustafsson wrote:
> Manuel Bouyer wrote:
> > >  - Can you run a GENERIC_MP kernel fully virtualized using HVM and
> > >    take advantage of multiple CPUs that way?
> > 
> > This should work. I run a windows 2003 HVM which see multiple CPUs, so
> > it should work with NetBSD too.
> 
> I built a -current kernel using the following configuration file
> (NOFLOPPY.MP):
> 
>   include "arch/i386/conf/GENERIC.MP"
>   no fdc0 at isa?
>   no fd*  at fdc?
> 
> I then booted it under Xen 3.0.3 on an Intel Core 2 Quad Q6600 CPU,
> using the following Xen configuration file:
> 
>   kernel = "/usr/lib/xen-ioemu-3.0/boot/hvmloader"
>   builder = 'hvm'
>   memory = 256
>   name = "curvi"
>   vcpus = 4
>   acpi = 1
>   apic = 1
>   vif = [ 'type=ioemu, bridge=xenbr0,mac=00:16:3e:49:34:80' ]
>   disk = ['phy:/dev/mapper/guesthouse-current,ioemu:hda,w']
>   device_model = '/usr/lib/xen-ioemu-3.0/bin/qemu-dm'
>   ne2000=0
>   boot='c'
>   serial = 'pty'
>   nographic = 1
> 
> It hung while attaching the third CPU core:
> 
>   >> NetBSD/i386 BIOS Boot, Revision 3.3
>   >> (root%guru.araneus.fi@localhost, Mon Aug  6 21:18:55 EEST 2007)
>   >> Memory: 639/261120 k
>   Press return to boot now, any other key for boot menu
>   booting hd0a:netbsd - starting in 0 
>   9165028+421316+363768 [461888+446360]=0xa5ca38
>   BIOS CFG: Model-SubM-Rev: fc-00-01, 0x4074<EBDA,KBDINT,RTC,IC2,KBDF>
>   Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
>       2006, 2007
>       The NetBSD Foundation, Inc.  All rights reserved.
>   Copyright (c) 1982, 1986, 1989, 1991, 1993
>       The Regents of the University of California.  All rights reserved.
> 
>   NetBSD 4.99.30 (NOFLOPPY.MP) #0: Wed Sep  5 19:10:40 EEST 2007
>         root@dhcppc1:/usr/src/sys/arch/i386/compile/NOFLOPPY.MP
>   total memory = 255 MB
>   rbus: rbus_min_start set to 0x40000000
>   avail memory = 240 MB
>   mainbus0 (root)
>   cpu0 at mainbus0 apid 0: (boot processor)
>   cpu0: Intel Core 2 (Merom) (686-class), 2400.24 MHz, id 0x6f7
>   cpu0: "Intel(R) Core(TM)2 Quad CPU           @ 2.40GHz"
>   cpu1 at mainbus0 apid 1: (application processor)
>   cpu1: Intel Core 2 (Merom) (686-class), 2400.33 MHz, id 0x6f7
>   cpu1: "Intel(R) Core(TM)2 Quad CPU           @ 2.40GHz"
>   cpu2 at mainbus0 apid 2: (application processor)
> 
> There was no more output after that.  When I tried to destroy the hung
> VM using "xm destroy curvi", the whole system locked up (including the
> Linux dom0) and had to be rebooted.
> 
> If I set "vcpus = 2" in the configuration file, NetBSD boots
> successfully.

Maybe try without acpi ?
No need to build a new kernel to try, just
boot -c
disable acpi
quit

-- 
Manuel Bouyer, LIP6, Universite Paris VI.           
Manuel.Bouyer%lip6.fr@localhost
     NetBSD: 26 ans d'experience feront toujours la difference
--