Date: Tue, 16 Nov 2004 22:47:36 +0100
From: Florian Schmidt <mista.tapas@gmx.net>
To: "K.R. Foley" <kr@cybsft.com>
Cc: Ingo Molnar <mingo@elte.hu>, Mark_H_Johnson@raytheon.com,
       linux-kernel@vger.kernel.org, Lee Revell <rlrevell@joe-job.com>,
       Rui Nuno Capela <rncbc@rncbc.org>, Bill Huey <bhuey@lnxw.com>,
       Adam Heath <doogie@debian.org>, Thomas Gleixner <tglx@linutronix.de>,
       Michal Schmidt <xschmi00@stud.feec.vutbr.cz>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       Karsten Wiese <annabellesgarden@yahoo.de>,
       Gunther Persoons <gunther_persoons@spymac.com>, emann@mrv.com,
       Shane Shrybman <shrybman@aei.ca>, Amit Shah <amit.shah@codito.com>,
       Stefan Schweizer <sschweizer@gmail.com>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.27-3
Message-ID: <20041116224736.0c647e42@mango.fruits.de>
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On Tue, 16 Nov 2004 15:42:52 -0600
"K.R. Foley" <kr@cybsft.com> wrote:

> Just a thought. What priority are you running rtc_wakup at? If you are 
> doing something like:
> 
> schp.sched_priority = sched_get_priority_max(SCHED_FIFO); // which 
> equates to a priority of 99
> 
> Then you it is actually running at a higher priority than the rtc, and 
> it won't work very well. I tend to run rtc (IRQ 8) at 99 and the 
> programs accessing it at 98 which seems to work reasonably well.

yah, the default for rtc_wakeup is 91 for the read() thread and 90 for the
reporting thread. So rtc's prio is above that.

flo
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