From: "Russ Cox" <rsc@swtch.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Support for Mac OS X Leopard
Date: Sun, 30 Sep 2007 17:09:09 -0400 [thread overview]
Message-ID: <20070930210912.CB17D1E8C1C@holo.morphisms.net> (raw)
In-Reply-To: <14ec7b180709301127i4bdae0bcs276f771355322816@mail.gmail.com>
>> the right thing to do is to fix timesync to notice
>> such jumps and write them off as suspend/resume
>> instead of assuming that the cpu has gotten *very* slow.
>
> timesync still needs to set the correct time (a system which was
> suspended for, say, 10 hours will live 10 hours in the past). perhaps
> devcons.c:^writebintime should be the one to skip updating the clock
> frequency?
timesync is in charge of figuring out the
correspondence between cpu frequency
and real time. the kernel does what timesync
says. instead of the kernel second-guessing
timesync, timesync should just be fixed.
sometimes clock speed *does* vary w.r.t. real time.
if i switch from ac to battery on a laptop,
then timesync helps navigate the change
in cpu frequency.
russ
prev parent reply other threads:[~2007-09-30 21:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-29 19:52 Tharaneedharan Vilwanathan
2007-09-29 19:57 ` andrey mirtchovski
2007-09-29 20:25 ` Tharaneedharan Vilwanathan
2007-09-29 21:30 ` Francisco J Ballesteros
2007-09-29 21:49 ` andrey mirtchovski
2007-09-29 21:50 ` andrey mirtchovski
2007-09-30 15:18 ` Jack Johnson
2007-09-30 18:20 ` Russ Cox
2007-09-30 18:27 ` andrey mirtchovski
2007-09-30 21:09 ` Russ Cox [this message]
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