LinuxQuestions.org - Losing too many ticks! TSC cannot be used as a timesource.

Hi
This is my first thread

I am getting these error messages from past two weeks on my server after i reinstalled centos os and connected new hard disk of 200gb. Due to this error NFS mounting and accessing NFS file has become slow

Error

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.

my system settings are
Processor : Intel Pentium 4 CPU 2.66GHz
Motherboard: Asus
RAM: 512
2 SATA harddisk (each of 200gb)
OS - centos 4
kernel: 2.6.9-34.EL
services running on my server is Nfs and Samba

Is this a serious problem?

below is my output of dmesg

Linux version 2.6.9-34.EL (buildcentos@build-i386) (gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)) #1 Wed Mar 8 00:07:35 CST 2006
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000001f7f0000 (usable)
BIOS-e820: 000000001f7f0000 - 000000001f7f3000 (ACPI NVS)
BIOS-e820: 000000001f7f3000 - 000000001f800000 (ACPI data)
BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
0MB HIGHMEM available.
503MB LOWMEM available.
Using x86 segment limits to approximate NX protection
zapping low mappings.
On node 0 totalpages: 129008
DMA zone: 4096 pages, LIFO batch:1
Normal zone: 124912 pages, LIFO batch:16
HighMem zone: 0 pages, LIFO batch:1
DMI 2.3 present.
ACPI: RSDP (v000 AOpen ) @ 0x000f8880
ACPI: RSDT (v001 AOpen AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x1f7f3040
ACPI: FADT (v001 AOpen AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x1f7f30c0
ACPI: MCFG (v001 AOpen AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x1f7f78c0
ACPI: MADT (v001 AOpen AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x1f7f7800
ACPI: DSDT (v001 AOPEN AWRDACPI 0x00001000 MSFT 0x0100000e) @ 0x00000000
ACPI: PM-Timer IO Port: 0x4008
Built 1 zonelists
Kernel command line: ro root=LABEL=/
Initializing CPU#0
CPU 0 irqstacks, hard=c03e7000 soft=c03e6000
PID hash table entries: 2048 (order: 11, 32768 bytes)
Detected 2661.337 MHz processor.
Using tsc for high-res timesource
Console: colour VGA+ 80x25
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 506936k/516032k available (2117k kernel code, 8380k reserved, 669k data, 144k init, 0k highmem)
Calibrating delay using timer specific routine.. 5325.76 BogoMIPS (lpj=2662881)
Security Scaffold v1.0.0 initialized
SELinux: Initializing.
SELinux: Starting in permissive mode
There is already a security framework initialized, register_security failed.
selinux_register_security: Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: After generic identify, caps: bfebfbff 20100000 00000000 00000000
CPU: After vendor identify, caps: bfebfbff 20100000 00000000 00000000
monitor/mwait feature present.
using mwait in idle threads.
CPU: Trace cache: 12K uops, L1 D cache: 16K
CPU: L2 cache: 1024K
CPU: After all inits, caps: bfebf3ff 20100000 00000000 00000080
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (24) available
CPU: Intel(R) Pentium(R) 4 CPU 2.66GHz stepping 01
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
ACPI: IRQ9 SCI: Level Trigger.
checking if image is initramfs... it is
Freeing initrd memory: 514k freed
NET: Registered protocol family 16
PCI: PCI BIOS revision 3.00 entry at 0xfaab0, last bus=1
PCI: Using MMCONFIG
mtrr: v2.0 (20020519)
ACPI: Subsystem revision 20040816
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.2
PCI: Transparent bridge - 0000:00:1e.0
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.HUB0._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 *10 11 12 14 15)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNK0] (IRQs 3 4 5 6 7 9 10 11 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNK1] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
Linux Plug and Play Support v0.97 (c) Adam Belay
usbcore: registered new driver usbfs
usbcore: registered new driver hub
PCI: Using ACPI for IRQ routing
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 9
ACPI: PCI interrupt 0000:00:02.0[A] -> GSI 9 (level, low) -> IRQ 9
ACPI: PCI interrupt 0000:00:1b.0[A] -> GSI 9 (level, low) -> IRQ 9
ACPI: PCI Interrupt Link [LNK1] enabled at IRQ 11
ACPI: PCI interrupt 0000:00:1d.0[A] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
ACPI: PCI interrupt 0000:00:1d.1[B] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 10
ACPI: PCI interrupt 0000:00:1d.2[C] -> GSI 10 (level, low) -> IRQ 10
ACPI: PCI interrupt 0000:00:1d.3[D] -> GSI 9 (level, low) -> IRQ 9
ACPI: PCI interrupt 0000:00:1d.7[A] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI interrupt 0000:00:1f.2[B] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI interrupt 0000:00:1f.3[B] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 10
ACPI: PCI interrupt 0000:01:08.0[A] -> GSI 10 (level, low) -> IRQ 10
apm: BIOS version 1.2 Flags 0x07 (Driver version 1.16ac)
apm: overridden by ACPI.
audit: initializing netlink socket (disabled)
audit(1042633125.932:1): initialized
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 B4802E7A21D4FA03
- key was been created 99164698 seconds in future
- User ID: CentOS (Kernel Module GPG key)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
ACPI: Fan [FAN] (on)
ACPI: Processor [CPU0] (supports C1)
ACPI: Thermal Zone [THRM] (41 C)
Real Time Clock Driver v1.12
Linux agpgart interface v0.100 (c) Dave Jones
agpgart: Detected an Intel 915G Chipset.
agpgart: Maximum main memory to use for agp memory: 431M
agpgart: Detected 7932K stolen memory.
agpgart: AGP aperture is 256M @ 0xc0000000
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 $ 8 ports, IRQ sharing enabled
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
divert: not allocating divert_blk for non-ethernet device lo
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...
hdb: ST3200827AS, ATA DISK drive
Probing IDE interface ide1...
hdc: ST3200822AS, ATA DISK drive
Probing IDE interface ide2...
Probing IDE interface ide3...
Probing IDE interface ide4...
Probing IDE interface ide5...
Using cfq io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hdb: max request size: 1024KiB
hdb: 390721968 sectors (200049 MB) w/8192KiB Cache, CHS=24321/255/63
hdb: cache flushes supported
hdb: hdb1 hdb2 hdb3 hdb4 < hdb5 hdb6 hdb7 hdb8 >
hdc: max request size: 1024KiB
hdc: 390721968 sectors (200049 MB) w/8192KiB Cache, CHS=24321/255/63
hdc: cache flushes supported
hdc: hdc1 hdc2 hdc3
ide-floppy driver 0.99.newide
usbcore: registered new driver hiddev
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.0:USB HID core driver
mice: PS/2 mouse device common for all mice
input: AT Translated Set 2 keyboard on isa0060/serio0
input: ImPS/2 Logitech Wheel Mouse on isa0060/serio1
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
NET: Registered protocol family 2
IP: routing cache hash table of 1024 buckets, 32Kbytes
TCP: Hash tables configured (established 32768 bind 9362)
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
ACPI: (supports S0 S1 S4 S5)
ACPI wakeup devices:
PCI0 PEX0 PEX1 PEX2 PEX3 HUB0 UAR1 UAR2 USB0 USB1 USB2 USB3 USBE AC97 AZAL
Freeing unused kernel memory: 144k freed
SCSI subsystem initialized
libata version 1.20 loaded.
ata_piix 0000:00:1f.2: version 1.05
ACPI: PCI interrupt 0000:00:1f.2[B] -> GSI 11 (level, low) -> IRQ 11
ata: 0x1f0 IDE port busy
ata: 0x170 IDE port busy
ata_piix: probe of 0000:00:1f.2 failed with error -16
device-mapper: 4.5.0-ioctl (2005-10-04) initialised: dm-devel@redhat.com
kjournald starting. Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
SELinux: Disabled at runtime.
SELinux: Unregistering netfilter hooks
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.
spurious 8259A interrupt: IRQ7.
Losing some ticks... checking if CPU frequency changed.
inserting floppy driver for 2.6.9-34.EL
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
e100: Intel(R) PRO/100 Network Driver, 3.4.8-k2-NAPI
e100: Copyright(c) 1999-2005 Intel Corporation
ACPI: PCI interrupt 0000:01:08.0[A] -> GSI 10 (level, low) -> IRQ 10
divert: allocating divert_blk for eth0
e100: eth0: e100_probe: addr 0xd0000000, irq 10, MAC addr 00:01:80:59:B7:01
ACPI: PCI interrupt 0000:00:1b.0[A] -> GSI 9 (level, low) -> IRQ 9
PCI: Setting latency timer of device 0000:00:1b.0 to 64
hda_codec: Unknown model for ALC880, trying auto-probe from BIOS...
hda_codec: Cannot set up configuration from BIOS. Using 3-stack mode...
hw_random: RNG not detected
ACPI: PCI interrupt 0000:00:1d.7[A] -> GSI 11 (level, low) -> IRQ 11
ehci_hcd 0000:00:1d.7: EHCI Host Controller
PCI: Setting latency timer of device 0000:00:1d.7 to 64
ehci_hcd 0000:00:1d.7: irq 11, pci mem e00c2000
ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 1
PCI: cache line size of 128 is not supported by device 0000:00:1d.7
ehci_hcd 0000:00:1d.7: USB 2.0 enabled, EHCI 1.00, driver 2004-May-10
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 8 ports detected
USB Universal Host Controller Interface driver v2.2
ACPI: PCI interrupt 0000:00:1d.0[A] -> GSI 11 (level, low) -> IRQ 11
uhci_hcd 0000:00:1d.0: UHCI Host Controller
PCI: Setting latency timer of device 0000:00:1d.0 to 64
uhci_hcd 0000:00:1d.0: irq 11, io base 0000e000
uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ACPI: PCI interrupt 0000:00:1d.1[B] -> GSI 11 (level, low) -> IRQ 11
uhci_hcd 0000:00:1d.1: UHCI Host Controller
PCI: Setting latency timer of device 0000:00:1d.1 to 64
uhci_hcd 0000:00:1d.1: irq 11, io base 0000e100
uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 3
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI interrupt 0000:00:1d.2[C] -> GSI 10 (level, low) -> IRQ 10
uhci_hcd 0000:00:1d.2: UHCI Host Controller
PCI: Setting latency timer of device 0000:00:1d.2 to 64
uhci_hcd 0000:00:1d.2: irq 10, io base 0000e200
uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
ACPI: PCI interrupt 0000:00:1d.3[D] -> GSI 9 (level, low) -> IRQ 9
uhci_hcd 0000:00:1d.3: UHCI Host Controller
PCI: Setting latency timer of device 0000:00:1d.3 to 64
uhci_hcd 0000:00:1d.3: irq 9, io base 0000e300
uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 5
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 2 ports detected
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
ACPI: Power Button (FF) [PWRF]
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 hdb7, internal journal
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.
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.
Losing some ticks... checking if CPU frequency changed.
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 dm-1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting. Commit interval 5 seconds
EXT3 FS on dm-0, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting. Commit interval 5 seconds
EXT3 FS on dm-2, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting. Commit interval 5 seconds
EXT3 FS on hdb8, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
Losing some ticks... checking if CPU frequency changed.
IA-32 Microcode Update Driver: v1.14 <tigran@veritas.com>
microcode: CPU0 updated from revision 0x5 to 0x12, date = 11222004
IA-32 Microcode Update Driver v1.14 unregistered
Losing some ticks... checking if CPU frequency changed.
parport0: PC-style at 0x378 [PCSPP,TRISTATE]
ip_tables: (C) 2000-2002 Netfilter core team
ip_tables: (C) 2000-2002 Netfilter core team
e100: eth0: e100_watchdog: link up, 100Mbps, full-duplex
Losing some ticks... checking if CPU frequency changed.
parport0: PC-style at 0x378 [PCSPP,TRISTATE]
lp0: using parport0 (polling).
lp0: console ready
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 c0378f60(lo)
IPv6 over IPv4 tunneling driver
divert: not allocating divert_blk for non-ethernet device sit0
Losing some ticks... checking if CPU frequency changed.
Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
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.
Losing some ticks... checking if CPU frequency changed.
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 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.
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.
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.
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.