[Xen-devel] Bad clock ticking in xen0

[Tomas Kouba <tomas@xxxxxxxx>]

Hi,
I have a problem with too fast clock in dom0.
The clock is 3-4times faster than 'real' clock.
In users list I got an advice suggesting that it is a hw bug. But I have 
no other problem with the hw and
I hope it is a xen bug (or my misconfiguration) and it can be fixed or 
workarounded.
It happens on a notebook compaq evo N115 (Duron 996MHz).
On my desktop with similar configuration there is no problem (xm dmesg 
attached for both).
I tried to locate the bug myself but with no luck :( Could you please 
suggest some hints where
to start debugging?

--
Tomas Kouba

 __  __            _____  ___   ___  
 \ \/ /___ _ __   |___ / / _ \ / _ \ 
  \  // _ \ '_ \    |_ \| | | | | | |
  /  \  __/ | | |  ___) | |_| | |_| |
 /_/\_\___|_| |_| |____(_)___(_)___/ 
                                     
 http://www.cl.cam.ac.uk/netos/xen
 University of Cambridge Computer Laboratory

 Xen version 3.0.0 (rread@xxxxxxxxxxxxxxxxxxxx) (gcc version 4.0.1 20050727 
(Red Hat 4.0.1-5)) Tue Dec 13 15:49:56 PST 2005
 Latest ChangeSet: unavailable 

(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009fc00 (usable)
(XEN)  000000000009fc00 - 00000000000a0000 (reserved)
(XEN)  00000000000f0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000000fff0000 (usable)
(XEN)  000000000fff0000 - 000000000fff3000 (ACPI NVS)
(XEN)  000000000fff3000 - 0000000010000000 (ACPI data)
(XEN)  00000000ffff0000 - 0000000100000000 (reserved)
(XEN) System RAM: 255MB (261692kB)
(XEN) Xen heap: 10MB (10648kB)
(XEN) PAE disabled.
(XEN) found SMP MP-table at 000f5eb0
(XEN) DMI 2.2 present.
(XEN) Using APIC driver default
(XEN) ACPI: RSDP (v000 VIA694                                ) @ 0x000f78b0
(XEN) ACPI: RSDT (v001 VIA694 MSI ACPI 0x42302e31 AWRD 0x00000000) @ 0x0fff3000
(XEN) ACPI: FADT (v001 VIA694 MSI ACPI 0x42302e31 AWRD 0x00000000) @ 0x0fff3040
(XEN) ACPI: MADT (v001 VIA694 MSI ACPI 0x42302e31 AWRD 0x00000000) @ 0x0fff58c0
(XEN) ACPI: DSDT (v001 VIA694 AWRDACPI 0x00001000 MSFT 0x0100000c) @ 0x00000000
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
(XEN) Processor #0 6:3 APIC version 16
(XEN) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 2, version 17, 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 dfl dfl)
(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 849.618 MHz processor.
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
(XEN) CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
(XEN) CPU: L2 Cache: 64K (64 bytes/line)
(XEN) CPU0: AMD Duron(tm) processor stepping 01
(XEN) Total of 1 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN) ..TIMER: vector=0x31 pin1=2 pin2=-1
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 1 CPUs
(XEN) mtrr: v2.0 (20020519)
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen-ELF header found: 
'GUEST_OS=linux,GUEST_VER=2.6,XEN_VER=xen-3.0,VIRT_BASE=0xC0000000,PAE=no,LOADER=generic'
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   01800000->02000000 (55177 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0100000->c047e2a0
(XEN)  Init. ramdisk: c047f000->c06b7600
(XEN)  Phys-Mach map: c06b8000->c06efe24
(XEN)  Start info:    c06f0000->c06f1000
(XEN)  Page tables:   c06f1000->c06f4000
(XEN)  Boot stack:    c06f4000->c06f5000
(XEN)  TOTAL:         c0000000->c0800000
(XEN)  ENTRY ADDRESS: c0100000
(XEN) Initrd len 0x238600, start at 0xc047f000
(XEN) Scrubbing Free RAM: ...done.
(XEN) Xen trace buffers: disabled
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to 
Xen).

 __  __            _____  ___   ___  
 \ \/ /___ _ __   |___ / / _ \ / _ \ 
  \  // _ \ '_ \    |_ \| | | | | | |
  /  \  __/ | | |  ___) | |_| | |_| |
 /_/\_\___|_| |_| |____(_)___(_)___/ 
                                     
 http://www.cl.cam.ac.uk/netos/xen
 University of Cambridge Computer Laboratory

 Xen version 3.0.0 (rread@xxxxxxxxxxxxxxxxxxxx) (gcc version 4.0.1 20050727 
(Red Hat 4.0.1-5)) Tue Dec 13 15:49:56 PST 2005
 Latest ChangeSet: unavailable 

(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009e800 (usable)
(XEN)  000000000009e800 - 00000000000a0000 (reserved)
(XEN)  00000000000c0000 - 00000000000cc000 (reserved)
(XEN)  00000000000dc000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000000eef0000 (usable)
(XEN)  000000000eef0000 - 000000000eeff000 (ACPI data)
(XEN)  000000000eeff000 - 000000000ef00000 (ACPI NVS)
(XEN)  000000000ef00000 - 000000000f000000 (usable)
(XEN)  00000000fff80000 - 0000000100000000 (reserved)
(XEN) System RAM: 239MB (245304kB)
(XEN) Xen heap: 10MB (10652kB)
(XEN) PAE disabled.
(XEN) DMI 2.3 present.
(XEN) Using APIC driver default
(XEN) ACPI: RSDP (v000 PTLTD                                 ) @ 0x000f6dd0
(XEN) ACPI: RSDT (v001 PTLTD    RSDT   0x06040000  LTP 0x00000000) @ 0x0eefb63b
(XEN) ACPI: FADT (v001 COMPAQ  EAGLES  0x06040000 PTL_ 0x000f4240) @ 0x0eefeeb6
(XEN) ACPI: SSDT (v001 PTLTD  POWERNOW 0x06040000  LTP 0x00000001) @ 0x0eefef2a
(XEN) ACPI: DSDT (v001 COMAPQ   EAGLES 0x06040000 MSFT 0x0100000d) @ 0x00000000
(XEN) Local APIC disabled by BIOS -- you can enable it with "lapic"
(XEN) Initializing CPU#0
(XEN) Detected 996.587 MHz processor.
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
(XEN) CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
(XEN) CPU: L2 Cache: 64K (64 bytes/line)
(XEN) CPU0: AMD mobile AMD Duron(tm) Processor stepping 01
(XEN) SMP motherboard not detected.
(XEN) Local APIC not detected. Using dummy APIC emulation.
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 1 CPUs
(XEN) mtrr: v2.0 (20020519)
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen-ELF header found: 
'GUEST_OS=linux,GUEST_VER=2.6,XEN_VER=xen-3.0,VIRT_BASE=0xC0000000,PAE=no,LOADER=generic'
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   01800000->02000000 (22528 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0100000->c0600924
(XEN)  Init. ramdisk: c0601000->c0601000
(XEN)  Phys-Mach map: c0601000->c0619000
(XEN)  Start info:    c0619000->c061a000
(XEN)  Page tables:   c061a000->c061d000
(XEN)  Boot stack:    c061d000->c061e000
(XEN)  TOTAL:         c0000000->c0800000
(XEN)  ENTRY ADDRESS: c0100000
(XEN) Scrubbing Free RAM: ...done.
(XEN) Xen trace buffers: disabled
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to 
Xen).

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