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