Bug 472530 (SpeedyGhost)

Summary: System clock slower in new kernel
Product: [Fedora] Fedora Reporter: SpeedyGhost <SpeedyGhost>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: medium    
Version: 10CC: kernel-maint, lgoncalv, SpeedyGhost
Target Milestone: ---Keywords: Triaged
Target Release: ---   
Hardware: i686   
OS: Linux   
URL: http://smolts.org/client/show_all/pub_653cedda-bd72-40d5-9e25-a3cfe467a293
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-12-18 06:54:35 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
/var/log/dmesg on old kernel
none
/var/log/dmesg on new kernel none

Description SpeedyGhost 2008-11-21 15:28:58 UTC
Description of problem:
    I have fully updated Fedora 9 on my laptop Fujitsu Siemens Amilo PRO V2035 and my system clock is slower, on one minute it's missing about 2.5 seconds, in /proc/interrupts 'LOC: xxxx Local timer interrupts' xxxx is increasing very fast. I have that problem also with 2.6.27.5-37.fc9.i686 kernel, tried also on older kernel (2.6.26.6-79.fc9.i686) but there is ok, timer and system time is working fine. I was thinking first that it's problem with my bios or CMOS battery, but today I bought a new battery and problem is same, tried also on Knoppix live and there is also ok.


Additional info:
    Here is a link on my Smolt profile:
http://smolts.org/client/show_all/pub_653cedda-bd72-40d5-9e25-a3cfe467a293

Comment 1 Chuck Ebbert 2008-11-25 15:52:27 UTC
Can you get the boot messages from the old and new kernels?

1. Boot the old kernel, then attach the file /var/log/dmesg to this bug.
2. Do the same with the new kernel.

Comment 2 SpeedyGhost 2008-11-25 18:59:57 UTC
Created attachment 324647 [details]
/var/log/dmesg on old kernel

Comment 3 SpeedyGhost 2008-11-25 19:01:33 UTC
Created attachment 324648 [details]
/var/log/dmesg on new kernel

Comment 4 SpeedyGhost 2008-11-25 19:04:16 UTC
Here it is, as you asked, from old and new kernel.

Regards

Comment 5 SpeedyGhost 2009-02-28 17:32:01 UTC
Fedora 10, i686 - same problem :(

Comment 6 SpeedyGhost 2009-03-02 17:21:50 UTC
Problem solved! :)

added 'hpet=force' to kernel line in grub, so problem is with clocksource. In available_clocksource was 'acpi_pm jiffies tsc'. It was using acpi_pm and with that clock was slower about 2 seconds on a minute, when I changed to jiffies, then system halted, with 'tsc' as clocksource system clock was faster about half second on a minute and with forced 'hpet' on boot clock is ok. Only it boots little slower than usual, first halts about minute or two and then continues with normal boot.

Comment 7 Luis Claudio R. Goncalves 2009-03-19 18:05:47 UTC
Just a note from the newest dmesg (comment #3) you posted here:

   Linux version 2.6.27.5-41.fc9.i686 
   ...
   HPET not enabled in BIOS. You might try hpet=force boot option

Stress on "HPET not enabled in BIOS". I believe that if you enable HPET in your BIOS you won't need the boot parameters.

Also, yes, this TSC has been ruled as untable during boot (the same dmesg) because it halts on idle:

   Marking TSC unstable due to TSC halts in idle

Comment 8 Bug Zapper 2009-11-18 07:58:59 UTC
This message is a reminder that Fedora 10 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 10.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '10'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 10's end of life.

Bug Reporter: Thank you for reporting this issue and we are sorry that 
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The process we are following is described here: 
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Comment 9 Bug Zapper 2009-12-18 06:54:35 UTC
Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.