time runs too slow on maple

[brian jewell]

FYI: I have seen the real-time clock issue on the Maple board I am using for development. As was pointed out in a previous email on this subject, it almost as if the clock stops running when the board is powered off. But, the loss of clock accuracy is also noticeable if the Maple board is left to run for extended periods of time.

--Brian


-----Original Message-----
From: linuxppc64-dev-bounces at ozlabs.org
[mailto:linuxppc64-dev-bounces at ozlabs.org]On Behalf Of Olaf Hering
Sent: Monday, January 09, 2006 11:17 PM
To: Benjamin Herrenschmidt
Cc: linuxppc64-dev at ozlabs.org
Subject: Re: time runs too slow on maple


 On Tue, Jan 10, Benjamin Herrenschmidt wrote:

> We don't know if the problem has anything to do with the SMP tbsync. You
> are certainly welcome to improve that code, but the root of the problem
> is probably that the timebase calibration that we obtain from Open
> Firmware is not precise. Either that, or the clock is indeed not very
> stable (that would be bad). The first one could be worked around by
> doing some proper calibration and updating PIBS I suppose.

It has firmware 1.06. Does it really work on your board? Just wondering
if only my board goes slower.

-- 
short story of a lazy sysadmin:
 alias appserv=wotan
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