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From: Alexandre Pereira Nunes <alexandre.nunes@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: 2.6.18 tsc clocksource + ntp = excessive drift; acpi_pm does fine.
Date: Tue, 28 Nov 2006 21:46:28 -0200	[thread overview]
Message-ID: <456CCA54.6090504@gmail.com> (raw)

Hi,

with default boot I got tsc clocksource selected on an debian's 
2.6.18-3-k7 SMP build (but UP machine). ntp keeps bothering me with this 
message:
frequency error 512 PPM exceeds tolerance 500 PPM

If I remove ntp's drift file and restart, it goes fine for a while and 
then it goes with that behaviour again.
If I remove ntp's drift file, then do a: echo acpi_pm 
 >/sys/devices/system/clocksource/clocksource0/available_clocksource ; 
and then restart ntp, it goes fine "forever".

Any toughs, something I should look at?

I'll be glad to give more feedback.

I don't know if that happened with 2.6.17, but I'm pretty sure that with 
2.6.16 it was fine.

- Alexandre

             reply	other threads:[~2006-11-28 23:46 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-28 23:46 Alexandre Pereira Nunes [this message]
2006-11-29  1:03 ` 2.6.18 tsc clocksource + ntp = excessive drift; acpi_pm does fine john stultz
2006-11-29  1:29   ` Alexandre Pereira Nunes
2006-11-29 11:26   ` Alexandre Pereira Nunes

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