From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: What contributes to IA64 ITC/TOD drift?
Date: Wed, 09 Feb 2005 19:53:30 +0000 [thread overview]
Message-ID: <16906.27194.372672.998370@napali.hpl.hp.com> (raw)
In-Reply-To: <AEBB9AF2F7713A4FAB1397435451162E01120E12@spock.invent.psi.com>
>>>>> 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
next prev parent reply other threads:[~2005-02-09 19:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-09 2:27 What contributes to IA64 ITC/TOD drift? John Lee
2005-02-09 19:53 ` David Mosberger [this message]
2005-02-09 22:25 ` John Lee
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