CentOS virt - Jun 2010 - Xen 3.1.2 on CentOS 5.5 doesn't see all 4 CPUs

Hello all,

I've been digging around on this for a few days and I have not come up
with a solution.

I have a Compaq ProLiant DL580 (G1, the old tan Compaq) with 4 x 700MHz
P-III CPUs and 11GB of memory.  I've loaded CentOS 5.5 with Virtualization
(Xen) + KVM and patched up to current (full KS packages file list at the
end).

When it boots, Xen only detects a single CPU as shown in the xm dmesg
output (full output and the end):

(XEN) Detected 701.650 MHz processor.
(XEN) I/O virtualisation disabled
(XEN) CPU0: Intel Pentium III (Cascades) stepping 04
(XEN) Platform timer overflows in 2 jiffies.
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 1 CPUs
[...]
(XEN) Dom0 has maximum 1 VCPUs


The system shows all 4 CPUs when booted outside of Xen.

Any ideas on Xen options or anything I can try to see if I can get all 4
CPUs?


Thanks,

Bryan

___________________________________________________________________

 __  __            _____  _   ____     _  ___  _  _    _____  _       _ ____
 \ \/ /___ _ __   |___ / / | |___ \   / |/ _ \| || |  |___ / / |  ___| | ___|
  \  // _ \ _ \    |_ \ | |   __) |__| | (_) | || |_   |_ \ | | / _ \ |___ \
  /  \  __/ | | |  ___) || |_ / __/|__| |\__, |__   _| ___) || ||  __/
|___) |
 /_/\_\___|_| |_| |____(_)_(_)_____|  |_|  /_/   |_|(_)____(_)_(_)___|_|____/

 http://www.cl.cam.ac.uk/netos/xen
 University of Cambridge Computer Laboratory

 Xen version 3.1.2-194.3.1.el5 (mockbuild at centos.org) (gcc version 4.1.2
20080704 (Red Hat 4.1.2-48)) Thu May 13 13:02:01

EDT 2010
 Latest ChangeSet: unavailable

(XEN) Command line: dom0_mem=1024M crashkernel=128M at 16M
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: V2; EDID transfer time: 2 seconds
(XEN) Disc information:
(XEN)  Found 2 MBR signatures
(XEN)  Found 2 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009d800 (usable)
(XEN)  000000000009d800 - 00000000000a0000 (reserved)
(XEN)  00000000000f0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000dfffc000 (usable)
(XEN)  00000000dfffc000 - 00000000e0000000 (ACPI data)
(XEN)  00000000fec00000 - 00000000fec10000 (reserved)
(XEN)  00000000fee00000 - 00000000fee10000 (reserved)
(XEN)  00000000fff80000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 00000002c0000000 (usable)
(XEN) Kdump: 128MB (131072kB) at 0x1000000
(XEN) System RAM: 10751MB (11009636kB)
(XEN) Xen heap: 9MB (9740kB)
(XEN) Domain heap initialised: DMA width 32 bits
(XEN) PAE enabled, limit: 16 GB
(XEN) Local APIC disabled by BIOS -- you can enable it with "lapic"
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 701.650 MHz processor.
(XEN) I/O virtualisation disabled
(XEN) CPU0: Intel Pentium III (Cascades) stepping 04
(XEN) Platform timer overflows in 2 jiffies.
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 1 CPUs
(XEN) xenoprof: Initialization failed. No APIC
(XEN) *** LOADING DOMAIN 0 ***
(XEN) elf_parse_binary: phdr: paddr=0xc0400000 memsz=0x28771c
(XEN) elf_parse_binary: phdr: paddr=0xc0688000 memsz=0x164000
(XEN) elf_parse_binary: memory: 0xc0400000 -> 0xc07ec000
(XEN) elf_xen_parse_note: GUEST_OS = "linux"
(XEN) elf_xen_parse_note: GUEST_VERSION = "2.6"
(XEN) elf_xen_parse_note: XEN_VERSION = "xen-3.0"
(XEN) elf_xen_parse_note: VIRT_BASE = 0xc0000000
(XEN) elf_xen_parse_note: PADDR_OFFSET = 0xc0000000
(XEN) elf_xen_parse_note: ENTRY = 0xc0400000
(XEN) elf_xen_parse_note: HYPERCALL_PAGE = 0xc0401000
(XEN) elf_xen_parse_note: FEATURES 
"writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel"
(XEN) elf_xen_parse_note: PAE_MODE = "yes"
(XEN) elf_xen_parse_note: LOADER = "generic"
(XEN) elf_xen_addr_calc_check: addresses:
(XEN)     virt_base        = 0xc0000000
(XEN)     elf_paddr_offset = 0xc0000000
(XEN)     virt_offset      = 0x0
(XEN)     virt_kstart      = 0xc0400000
(XEN)     virt_kend        = 0xc07ec000
(XEN)     virt_entry       = 0xc0400000
(XEN)  Xen  kernel: 32-bit, PAE, lsb
(XEN)  Dom0 kernel: 32-bit, PAE, lsb, paddr 0xc0400000 -> 0xc07ec000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   000000003c000000->000000003e000000 (253952 pages to
be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0400000->c07ec000
(XEN)  Init. ramdisk: c07ec000->c0efec00
(XEN)  Phys-Mach map: c0eff000->c0fff000
(XEN)  Start info:    c0fff000->c0fff46c
(XEN)  Page tables:   c1000000->c100f000
(XEN)  Boot stack:    c100f000->c1010000
(XEN)  TOTAL:         c0000000->c1400000
(XEN)  ENTRY ADDRESS: c0400000
(XEN) Dom0 has maximum 1 VCPUs
(XEN) elf_load_binary: phdr 0 at 0xc0400000 -> 0xc068771c
(XEN) elf_load_binary: phdr 1 at 0xc0688000 -> 0xc0733cc4
(XEN) Initrd len 0x712c00, start at 0xc07ec000
(XEN) Scrubbing Free RAM:

...............................................................................................done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type \047CTRL-a\047 three times to switch
input to Xen).
(XEN) Freed 108kB init memory.

___________________________________________________________________

%packages
@admin-tools
@base
@core
@dns-server
@development-libs
@development-tools
@dialup
@editors
@engineering-and-scientific
@ftp-server
@gnome-desktop
@gnome-software-development
@games
@graphical-internet
@graphics
@java
@java-development
@kvm
@legacy-network-server
@mail-server
@mysql
@network-server
@office
@printing
@ruby
@server-cfg
@sound-and-video
@system-tools
@text-internet
@xen
@web-server
@smb-server
@x-software-development
@base-x
system-config-kickstart
system-config-netboot
system-config-netboot-cmd
keyutils
dmraid-events-logwatch
kexec-tools
gpart
iscsi-initiator-utils
trousers
bridge-utils
authd
fipscheck
hardlink
x86info
device-mapper-multipath
hfsutils
perl-XML-SAX
perl-XML-Twig
perl-XML-Dumper
perl-TimeDate
perl-libxml-perl
perl-Convert-ASN1
perl-XML-NamespaceSupport
perl-DateManip
perl-Crypt-SSLeay
perl-Mozilla-LDAP
perl-LDAP
perl-XML-Grove
python-imaging
perl-Archive-Zip
pexpect
imake
gcc-objc
expect
java-1.6.0-openjdk
nasm
statserial
xferstats
libsane-hpaio
libvirt-cim
Virtualization-en-US
libcmpiutil
telnet-server
rsh-server
tftp-server
mailman
postfix
squirrelmail
cyrus-imapd
mod_auth_mysql
mysql-devel
mysql-bench
php-mysql
openldap-servers
vnc-server
freeradius
system-config-bind
system-config-boot
rdesktop
lsscsi
uucp
festival
tsclient
x3270
lslk
nmap-frontend
wireshark-gnome
audit
mrtg
net-snmp-utils
sysstat
gnome-nettool
iptraf
vlock
dstat
Virtualization-en-US
php-odbc
mod_nss
mod_auth_mysql
mod_authz_ldap
php-mysql
xorg-x11-xbitmaps
openmotif-devel
mesa-libGLU-devel
libXp-devel
xorg-x11-resutils
xorg-x11-xsm
xorg-x11-server-Xnest
xorg-x11-xfs-utils
xorg-x11-server-Xvfb
-spamassassin

___________________________________________________________________

-- 
Bryan A. Ignatow
bryan at ignatow.org

Well, I can't say for sure the reason why it doesn't see all cpus, but I
do
know a P-III system is not going to support virtualization technology, so
you would never be able to run windows guests on it. Only systems sold in
the last year or two support VT. And motherboards that do support it are
fairly cheap - starting in the $60 range. 

Anywho, have you tried KVM instead?



-----Original Message-----
From: centos-virt-bounces at centos.org [mailto:centos-virt-bounces at
centos.org]
On Behalf Of Bryan A. Ignatow
Sent: Thursday, June 03, 2010 10:27 AM
To: Discussion about the virtualization on CentOS
Subject: [CentOS-virt] Xen 3.1.2 on CentOS 5.5 doesn't see all 4 CPUs

Hello all,

I've been digging around on this for a few days and I have not come up with
a solution.

I have a Compaq ProLiant DL580 (G1, the old tan Compaq) with 4 x 700MHz
P-III CPUs and 11GB of memory.  I've loaded CentOS 5.5 with Virtualization
(Xen) + KVM and patched up to current (full KS packages file list at the
end).

When it boots, Xen only detects a single CPU as shown in the xm dmesg output
(full output and the end):

(XEN) Detected 701.650 MHz processor.
(XEN) I/O virtualisation disabled
(XEN) CPU0: Intel Pentium III (Cascades) stepping 04
(XEN) Platform timer overflows in 2 jiffies.
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 1 CPUs
[...]
(XEN) Dom0 has maximum 1 VCPUs


The system shows all 4 CPUs when booted outside of Xen.

Any ideas on Xen options or anything I can try to see if I can get all 4
CPUs?


Thanks,

Bryan