Is power management on? Check the bios.
On Fri, Jul 28, 2000 at 12:14:01PM +0100, David Buscher wrote:
> I've been running RTlinux for about a month now, and three times so far
> I've got an "RTL: lost 122711 jiffies" message. Subsequently the xntpd
> daemon confirms that indeed the system has lost 1227 seconds of time
> compared to UTC. The one time I was logged in, the machine did indeed hang
> for about 20 minutes, and then came back to life of its own accord. The
> suspicious thing is that 122711 jiffies is very close to 2^39 Pentium
> clock ticks on this machine, so it sounds like an overflow problem
> somewhere. Any ideas on what could be happening?
>
> Details: Dell Pentium PII 450MHz, linux version 2.2.14-rtl2.3. I am
> running an RTL module which schedules a periodic task at 5kHz to read
> a ComputerBoards PCI-CTR05 counter card. Every 500 periods the task writes
> the accumulated values to an RT-FIFO. The periodic task does disable
> interrupts, but is always careful to limit the time spent with the
> interrupt disabled. I use long longs everywhere to calculate time delays,
> so numbers of size 2^39 should not cause a problem in my code. Is the
> internal Pentium timer 40 bits?
>
> thanks,
> David
> --------------------------------------+----------------------------------
> David Buscher | Phone +44 1223 337302
> Cavendish Laboratory, Madingley Road | Fax +44 1223 354599
> Cambridge CB3 0HE, UK | http://www.mrao.cam.ac.uk/~dfb
> --------------------------------------+----------------------------------
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