Subject: Re: Multiprocessor support
To: Manuel Bouyer <email@example.com>
From: Andreas Gustafsson <firstname.lastname@example.org>
Date: 09/05/2007 19:39:39
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
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'
serial = 'pty'
nographic = 1
It hung while attaching the third CPU core:
>> NetBSD/i386 BIOS Boot, Revision 3.3
>> (email@example.com, 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
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,
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
total memory = 255 MB
rbus: rbus_min_start set to 0x40000000
avail memory = 240 MB
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
Andreas Gustafsson, firstname.lastname@example.org