Re: What contributes to IA64 ITC/TOD drift?

From: David Mosberger <davidm_at_napali.hpl.hp.com>
Date: 2005-02-10 06:53:30
>>>>> On Tue, 8 Feb 2005 18:27:01 -0800, "John Lee" <jlee@platsolns.com> said:

  John> Maybe too broad a question but,

  John> 1. What in IA64 platform contributes to ITC drift?

Are you asking when the IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT bit should
be set?  If so, then the answer is that it should be set whenever the
ITC clocks of the processors in a machine are not driven off the same
oscillator.

  John> 2. What in IA64 platform contributes to TOD fluctuation?
  John> (excluding the quality of oscillator)

NTP comes to mind.  Any other error I can think of probably would lead
to a systematic error, not to fluctuations.

	--david
-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Received on Wed Feb 9 14:54:19 2005

This archive was generated by hypermail 2.1.8 : 2005-08-02 09:20:35 EST