lkml.org 
[lkml]   [2004]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Clock inaccuracy seen on NVIDIA nForce2 systems
> The system is running 2.6.9-rc4 and has been up for 2 days. I'm showing
> an offset of -32 seconds and growing.

That's -185 ppm (parts per million) error, or -0.0185%.

Typical cheap quartz crystals are +/- 100 ppm, but there are some cheaper
than that, and ceramic resonators like
http://www.ecsxtal.com/cerares.htm

I know Dave Mills learned from experience that the original +/-100 ppm
specs in NTP weren't wide enough and he had to change it to cope with
+/-500 ppm error in some clocks.

It *could* just be your motherboard's clock source.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:07    [W:0.028 / U:1.140 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site