[ntp:questions] Hopelessly broken clock?

Chris Adams cmadams at hiwaay.net
Mon Nov 17 04:36:52 UTC 2008

Once upon a time, Hal Murray <hal-usenet at ip-64-139-1-69.sjc.megapath.net> said:
>>I'm running CentOS 5 on my system and the only clock source I have available
>>is jiffies. Newer kernels should give you options like: acpi_pm jiffies hpet
>>tsc pit.
>I've been happier since I added
>  clocksource=acpi_pm
>to the boot command line.
>TSC is the default, at least on most of the systems I've used.

My Athlon 64 X2 defaulted to HPET.  It seems to have a very stable
clock; my drift file says "7.436" and my offsets right now are all in
the -1.5ms to 2.5ms range.

That's even with CPU frequency scaling enabled (running at 1GHz right

Chris Adams <cmadams at hiwaay.net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.

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