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[Xen-bugs] [Bug 608] New: Many "Timer ISR/1: Time went backwards" messag

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Subject: [Xen-bugs] [Bug 608] New: Many "Timer ISR/1: Time went backwards" messages on Dom0
From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx
Date: Sat, 08 Apr 2006 04:23:05 -0700
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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=608

           Summary: Many "Timer ISR/1: Time went backwards" messages on Dom0
           Product: Xen
           Version: unstable
          Platform: x86
        OS/Version: Linux-2.6
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: yongjhen@xxxxxxxxxxxxxxx


platform:
Intel Centrino Duo notebook (Asus W5F)

xen-unstable version:
changeset:   9532:5baf152d63ef
tag:         tip
user:        kaf24@xxxxxxxxxxxxxxxxxxxx
date:        Tue Apr  4 22:20:12 2006 +0100

I saw many messages of this kind in my /var/log/messages file:

Apr  8 20:53:11 ubuntu kernel: printk: 119 messages suppressed.
Apr  8 20:53:11 ubuntu kernel: Timer ISR/1: Time went backwards:
delta=-38986492 delta_cpu=91013508 shadow=7726599529282 off=511525662
processed=7727150000000 cpu_processed=7727020000000
Apr  8 20:53:11 ubuntu kernel:  0: 7727150000000
Apr  8 20:53:11 ubuntu kernel:  1: 7727020000000
Apr  8 20:53:17 ubuntu kernel: printk: 46 messages suppressed.
Apr  8 20:53:17 ubuntu kernel: Timer ISR/0: Time went backwards:
delta=-11960790 delta_cpu=38039210 shadow=7731780188528 off=707872103
processed=7732500000000 cpu_processed=7732450000000
Apr  8 20:53:17 ubuntu kernel:  0: 7732450000000
Apr  8 20:53:17 ubuntu kernel:  1: 7732500000000
Apr  8 20:53:22 ubuntu kernel: printk: 66 messages suppressed.
Apr  8 20:53:22 ubuntu kernel: Timer ISR/1: Time went backwards:
delta=-10288562 delta_cpu=29711438 shadow=7737885754780 off=163978991
processed=7738060000000 cpu_processed=7738020000000
Apr  8 20:53:22 ubuntu kernel:  0: 7738060000000
Apr  8 20:53:22 ubuntu kernel:  1: 7738020000000

xm dmesg:
 __  __            _____  ___                     _        _     _
 \ \/ /___ _ __   |___ / / _ \    _   _ _ __  ___| |_ __ _| |__ | | ___
  \  // _ \ '_ \    |_ \| | | |__| | | | '_ \/ __| __/ _` | '_ \| |/ _ \
  /  \  __/ | | |  ___) | |_| |__| |_| | | | \__ \ || (_| | |_) | |  __/
 /_/\_\___|_| |_| |____(_)___/    \__,_|_| |_|___/\__\__,_|_.__/|_|\___|

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

 Xen version 3.0-unstable (root@) (gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu3))
�  4�  8 18:22:51 CST 2006
 Latest ChangeSet: Tue Apr  4 22:20:12 2006 +0100 9532:5baf152d63ef

(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009fc00 (usable)
(XEN)  000000000009fc00 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000003f7c0000 (usable)
(XEN)  000000003f7c0000 - 000000003f7ce000 (ACPI data)
(XEN)  000000003f7ce000 - 000000003f800000 (ACPI NVS)
(XEN)  00000000fee00000 - 00000000fee01000 (reserved)
(XEN)  00000000ffb80000 - 0000000100000000 (reserved)
(XEN) System RAM: 1015MB (1039740kB)
(XEN) Xen heap: 10MB (10596kB)
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
(XEN) PAE disabled.
(XEN) found SMP MP-table at 000ff780
(XEN) DMI 2.3 present.
(XEN) Using APIC driver default
(XEN) ACPI: RSDP (v000 ACPIAM                                ) @ 0x000f7910
(XEN) ACPI: RSDT (v001 A M I  OEMRSDT  0x01000610 MSFT 0x00000097) @ 0x3f7c0000
(XEN) ACPI: FADT (v002 A M I  OEMFACP  0x01000610 MSFT 0x00000097) @ 0x3f7c0200
(XEN) ACPI: MADT (v001 A M I  OEMAPIC  0x01000610 MSFT 0x00000097) @ 0x3f7c0390
(XEN) ACPI: MCFG (v001 A M I  OEMMCFG  0x01000610 MSFT 0x00000097) @ 0x3f7c03f0
(XEN) ACPI: BOOT (v001 A M I  OEMBOOT  0x01000610 MSFT 0x00000097) @ 0x3f7c0430
(XEN) ACPI: OEMB (v001 A M I  AMI_OEM  0x01000610 MSFT 0x00000097) @ 0x3f7ce040
(XEN)   >>> ERROR: Invalid checksum
(XEN) ACPI: TCPA (v001 A M I  TBLOEMID 0x00000001 MSFT 0x00000097) @ 0x3f7c8230
(XEN)   >>> ERROR: Invalid checksum
(XEN) ACPI: DSDT (v001  W5F00 W5F00005 0x00000005 INTL 0x02002026) @ 0x00000000
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
(XEN) Processor #0 6:14 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
(XEN) Processor #1 6:14 APIC version 20
(XEN) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
(XEN) ACPI: IRQ0 used by override.
(XEN) ACPI: IRQ2 used by override.
(XEN) ACPI: IRQ9 used by override.
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) Initializing CPU#0
(XEN) Detected 1828.828 MHz processor.
(XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
(XEN) CPU: L2 cache: 2048K
(XEN) CPU: Physical Processor ID: 0
(XEN) CPU: Processor Core ID: 0
(XEN) VMXON is done
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#0.
(XEN) CPU0: Intel Genuine Intel(R) CPU           T2400  @ 1.83GHz stepping 08
(XEN) Booting processor 1/1 eip 90000
(XEN) Initializing CPU#1
(XEN) CPU: L1 I cache: 32K, L1 D cache: 32K
(XEN) CPU: L2 cache: 2048K
(XEN) CPU: Physical Processor ID: 0
(XEN) CPU: Processor Core ID: 1
(XEN) VMXON is done
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#1.
(XEN) CPU1: Intel Genuine Intel(R) CPU           T2400  @ 1.83GHz stepping 08
(XEN) Total of 2 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN) ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
(XEN) checking TSC synchronization across 2 CPUs: passed.
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 2 CPUs
(XEN) Machine check exception polling timer started.
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Domain 0 kernel supports features = { 0000001f }.
(XEN) Domain 0 kernel requires features = { 00000000 }.
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   01800000->02000000 (236463 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0100000->c043d394
(XEN)  Init. ramdisk: c043e000->c043e000
(XEN)  Phys-Mach map: c043e000->c0526ebc
(XEN)  Start info:    c0527000->c0528000
(XEN)  Page tables:   c0528000->c052b000
(XEN)  Boot stack:    c052b000->c052c000
(XEN)  TOTAL:         c0000000->c0800000
(XEN)  ENTRY ADDRESS: c0100000
(XEN) Dom0 has maximum 2 VCPUs
(XEN) Scrubbing Free RAM: ...........done.
(XEN) Xen trace buffers: disabled
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to
Xen).

Any thing I can help?
Thank.


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