[root@localhost ~]# dmesg
Linux version 2.6.12-1.1381_FC3smp (bhcompile@porky.build.redhat.com) (gcc version 3.4.4 20050721 (Red Hat 3.4.4-2)) #1 SMP Fri Oct 21 04:03:26 EDT 2005
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000003f7b1d00 (usable)
 BIOS-e820: 000000003f7b1d00 - 000000003f7b3d00 (ACPI NVS)
 BIOS-e820: 000000003f7b3d00 - 0000000040000000 (reserved)
 BIOS-e820: 00000000f4000000 - 00000000f8000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fed40000 (reserved)
 BIOS-e820: 00000000fed45000 - 0000000100000000 (reserved)
119MB HIGHMEM available.
896MB LOWMEM available.
found SMP MP-table at 000f9bf0
NX (Execute Disable) protection: active
On node 0 totalpages: 260017
  DMA zone: 4096 pages, LIFO batch:1
  Normal zone: 225280 pages, LIFO batch:31
  HighMem zone: 30641 pages, LIFO batch:15
DMI 2.4 present.
Using APIC driver default
Intel MultiProcessor Specification v1.4
    Virtual Wire compatibility mode.
OEM ID: COMPAQ   Product ID:              APIC at: 0xFEE00000
Processor #0 15:6 APIC version 16
I/O APIC #1 Version 17 at 0xFEC00000.
Enabling APIC mode:  Flat.  Using 1 I/O APICs
Processors: 1
Allocating PCI resources starting at 40000000 (gap: 40000000:b4000000)
Built 1 zonelists
Kernel command line: ro root=LABEL=/1 acpi=off
mapped APIC to ffffd000 (fee00000)
mapped IOAPIC to ffffc000 (fec00000)
Initializing CPU#0
CPU 0 irqstacks, hard=c0424000 soft=c0404000
PID hash table entries: 4096 (order: 12, 65536 bytes)
Detected 3193.032 MHz processor.
Using tsc for high-res timesource
Console: colour VGA+ 80x25
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 1024964k/1040068k available (2058k kernel code, 14124k reserved, 772k data, 232k init, 122564k highmem)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay loop... 6291.45 BogoMIPS (lpj=3145728)
Security Framework v1.0.0 initialized
SELinux:  Initializing.
SELinux:  Starting in permissive mode
selinux_register_security:  Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 512
CPU: After generic identify, caps: bfebfbff 20100000 00000000 00000000 0000e59d 00000000 00000001
CPU: After vendor identify, caps: bfebfbff 20100000 00000000 00000000 0000e59d 00000000 00000001
monitor/mwait feature present.
using mwait in idle threads.
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 2048K
CPU: Physical Processor ID: 0
CPU: After all inits, caps: bfebfbff 20100000 00000000 00000080 0000e59d 00000000 00000001
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (24) available
CPU0: Thermal monitoring enabled
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
CPU0: Intel(R) Pentium(R) 4 CPU 3.20GHz stepping 05
Total of 1 processors activated (6291.45 BogoMIPS).
WARNING: 1 siblings found for CPU0, should be 2
ENABLING IO-APIC IRQs
..TIMER: vector=0x31 pin1=-1 pin2=-1
...trying to set up timer (IRQ0) through the 8259A ...  failed.
...trying to set up timer as Virtual Wire IRQ... works.
Brought up 1 CPUs
CPU0 attaching sched-domain:
 domain 0: span 00000001
  groups: 00000001
  domain 1: span 00000001
   groups: 00000001
checking if image is initramfs... it is
Freeing initrd memory: 386k freed
NET: Registered protocol family 16
PCI: PCI BIOS revision 3.00 entry at 0xeafd0, last bus=63
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
ACPI: Subsystem revision 20050902
ACPI: Interpreter disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI: disabled
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: Probing PCI hardware
PCI: Probing PCI hardware (bus 00)
Boot video device is 0000:00:02.0
PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.2
PCI: Transparent bridge - 0000:00:1e.0
PCI: Using IRQ router default [8086/2810] at 0000:00:1f.0
PCI->APIC IRQ transform: 0000:00:02.0[A] -> IRQ 145
PCI->APIC IRQ transform: 0000:00:1a.0[A] -> IRQ 177
PCI->APIC IRQ transform: 0000:00:1a.1[B] -> IRQ 185
PCI->APIC IRQ transform: 0000:00:1a.7[C] -> IRQ 193
PCI->APIC IRQ transform: 0000:00:1b.0[A] -> IRQ 185
PCI->APIC IRQ transform: 0000:00:1c.1[B] -> IRQ 185
PCI->APIC IRQ transform: 0000:00:1d.0[A] -> IRQ 177
PCI->APIC IRQ transform: 0000:00:1d.1[B] -> IRQ 185
PCI->APIC IRQ transform: 0000:00:1d.7[A] -> IRQ 177
PCI->APIC IRQ transform: 0000:00:1f.2[B] -> IRQ 161
PCI->APIC IRQ transform: 0000:00:1f.5[B] -> IRQ 161
PCI BIOS passed nonexistent PCI bus 63!
PCI: using PPB 0000:00:1c.1[A] to get irq 20
PCI->APIC IRQ transform: 0000:3f:00.0[A] -> IRQ 177
PCI->APIC IRQ transform: 0000:07:04.0[A] -> IRQ 177
Losing some ticks... checking if CPU frequency changed.
Number of CPUs sharing cache didn't match any known set of CPUs
Number of CPUs sharing cache didn't match any known set of CPUs
apm: BIOS not found.
audit: initializing netlink socket (disabled)
audit(1186485713.031:1): initialized
highmem bounce pool size: 64 pages
Total HugeTLB memory allocated, 0
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
SELinux:  Registering netfilter hooks
Initializing Cryptographic API
ksign: Installing public key data
Loading keyring
- Added public key DA130D81657437A9
- User ID: Red Hat, Inc. (Kernel Module GPG key)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
PCI: Setting latency timer of device 0000:00:1c.0 to 64
pcie_portdrv_probe->Dev[283f:8086] has invalid IRQ. Check vendor BIOS
assign_interrupt_mode Found MSI capability
Allocate Port Service[pcie00]
Allocate Port Service[pcie02]
PCI: Setting latency timer of device 0000:00:1c.1 to 64
assign_interrupt_mode Found MSI capability
Allocate Port Service[pcie00]
Allocate Port Service[pcie02]
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Real Time Clock Driver v1.12
Linux agpgart interface v0.101 (c) Dave Jones
PNP: No PS/2 controller found. Probing ports directly.
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
Serial: 8250/16550 driver $Revision: 1.90 $ 76 ports, IRQ sharing enabled
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
Probing IDE interface ide0...
hda: WDC WD800JD-60LSA5, ATA DISK drive
Probing IDE interface ide1...
hdc: TSSTcorp CDW/DVD TS-H493A, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 1024KiB
hda: 156301488 sectors (80026 MB) w/8192KiB Cache, CHS=16383/255/63
hda: cache flushes supported
 hda: hda1 hda2 hda3 hda4
hdc: ATAPI 48X DVD-ROM CD-R/RW drive, 1536kB Cache
Uniform CD-ROM driver Revision: 3.20
ide-floppy driver 0.99.newide
usbcore: registered new driver hiddev
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.01:USB HID core driver
mice: PS/2 mouse device common for all mice
md: md driver 0.90.1 MAX_MD_DEVS=256, MD_SB_DISKS=27
NET: Registered protocol family 2
IP: routing cache hash table of 4096 buckets, 64Kbytes
TCP established hash table entries: 131072 (order: 9, 2097152 bytes)
TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
Freeing unused kernel memory: 232k freed
input: AT Translated Set 2 keyboard on isa0060/serio0
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
SELinux:  Disabled at runtime.
SELinux:  Unregistering netfilter hooks
input: ImExPS/2 Generic Explorer Mouse on isa0060/serio1
Losing some ticks... checking if CPU frequency changed.
FDC 0 is a post-1991 82077
3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
0000:07:04.0: 3Com PCI 3c905C Tornado at 0x1100. Vers LK1.1.19
hw_random: cannot enable RNG, aborting
PCI: Setting latency timer of device 0000:00:1a.7 to 64
ehci_hcd 0000:00:1a.7: EHCI Host Controller
ehci_hcd 0000:00:1a.7: debug port 1
ehci_hcd 0000:00:1a.7: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:1a.7: irq 193, io mem 0xf0504000
PCI: cache line size of 128 is not supported by device 0000:00:1a.7
ehci_hcd 0000:00:1a.7: USB 2.0 initialized, EHCI 1.00, driver 10 Dec 2004
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 4 ports detected
PCI: Setting latency timer of device 0000:00:1d.7 to 64
ehci_hcd 0000:00:1d.7: EHCI Host Controller
ehci_hcd 0000:00:1d.7: debug port 1
ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 2
ehci_hcd 0000:00:1d.7: irq 177, io mem 0xf0504400
PCI: cache line size of 128 is not supported by device 0000:00:1d.7
ehci_hcd 0000:00:1d.7: USB 2.0 initialized, EHCI 1.00, driver 10 Dec 2004
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 4 ports detected
USB Universal Host Controller Interface driver v2.2
PCI: Setting latency timer of device 0000:00:1a.0 to 64
uhci_hcd 0000:00:1a.0: UHCI Host Controller
uhci_hcd 0000:00:1a.0: new USB bus registered, assigned bus number 3
uhci_hcd 0000:00:1a.0: irq 177, io base 0x00002100
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
PCI: Setting latency timer of device 0000:00:1a.1 to 64
uhci_hcd 0000:00:1a.1: UHCI Host Controller
uhci_hcd 0000:00:1a.1: new USB bus registered, assigned bus number 4
uhci_hcd 0000:00:1a.1: irq 185, io base 0x00002120
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
PCI: Setting latency timer of device 0000:00:1d.0 to 64
uhci_hcd 0000:00:1d.0: UHCI Host Controller
uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 5
uhci_hcd 0000:00:1d.0: irq 177, io base 0x00002140
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 2 ports detected
PCI: Setting latency timer of device 0000:00:1d.1 to 64
uhci_hcd 0000:00:1d.1: UHCI Host Controller
uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 6
uhci_hcd 0000:00:1d.1: irq 185, io base 0x00002160
hub 6-0:1.0: USB hub found
hub 6-0:1.0: 2 ports detected
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
EXT3 FS on hda4, internal journal
device-mapper: 4.4.0-ioctl (2005-01-12) initialised: dm-devel@redhat.com
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on hda2, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
Adding 1052248k swap on /dev/hda3.  Priority:-1 extents:1
parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE]
parport0: irq 7 detected
ieee1394: Initialized config rom entry `ip1394'
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
NET: Registered protocol family 10
Disabled Privacy Extensions on device c0376ec0(lo)
IPv6 over IPv4 tunneling driver
Losing some ticks... checking if CPU frequency changed.
eth0: no IPv6 routers present
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
Losing some ticks... checking if CPU frequency changed.
.
.
.
Losing too many ticks!
TSC cannot be used as a timesource.
Possible reasons for this are:
  You're running with Speedstep,
  You don't have DMA enabled for your hard disk (see hdparm),
  Incorrect TSC synchronization on an SMP system (see dmesg).
Falling back to a sane timesource now.
[root@localhost ~]#

[root@localhost ~]# hdparm -Tt /dev/hda

/dev/hda:
 Timing cached reads:   4968 MB in  2.00 seconds = 2484.38 MB/sec
 Timing buffered disk reads:   12 MB in  3.07 seconds =   3.91 MB/sec
[root@localhost ~]# hdparm /dev/hda

/dev/hda:
 multcount    = 16 (on)
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  0 (off)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 16383/255/63, sectors = 80026361856, start = 0
[root@localhost ~]# hdparm -d1 /dev/hda

/dev/hda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)