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Weird dmesg 'Losing too many ticks!'
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Tashtego
n00b
n00b


Joined: 05 Oct 2004
Posts: 15
Location: Australia

PostPosted: Fri Oct 15, 2004 11:31 am    Post subject: Weird dmesg 'Losing too many ticks!' Reply with quote

A few days after my Gentoo install, (and after some other fiddling), I ran dmesg and noted this at the end:

Code:

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.


What does this mean? And what can I do to fix this up, give that there appears to be a problem?

Thanks!
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hds
Advocate
Advocate


Joined: 21 Aug 2004
Posts: 2629
Location: Sprockhoevel [GER]

PostPosted: Fri Oct 15, 2004 11:41 am    Post subject: Reply with quote

CONFIG_X86_PM_TIMER:
The Power Management Timer is available on all ACPI-capable, in most cases even if ACPI is unusable or blacklisted. This timing source is not affected by powermanagement features like aggressive processor idling, throttling, frequency and/or voltage scaling, unlike the commonly used Time Stamp Counter (TSC) timing source. So, if you see messages like 'Losing too many ticks!' in the kernel logs, and/or you are using a this on a notebook which does not yet have an HPET, you should say "Y" here.
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Deathwing00
Bodhisattva
Bodhisattva


Joined: 13 Jun 2003
Posts: 4087
Location: Dresden, Germany

PostPosted: Fri Oct 15, 2004 12:14 pm    Post subject: Reply with quote

Moved from Installing Gentoo.
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