Basham, Richard R wrote:
> I have a couple of machines that have been running for around 1700 hours straight
>(approx 71 days).
> However, I have not changed HZ. What is the normal setting for this value?
Normal on intel machines is 100 - this allows 100 timeslices per second.
> Can you explain why your user process exited when the jiffies ran out.
Nope, I can't. It's not that important to my project to find out.
My applications rely on having the user process
> available to the user at any given moment. Is this something I need to worry about?
> What do you recommend to be done for long running applications?
No, don't worry about timeslicing. I need more granular timeslicing
because I'm trying to do soft real time: When an alarm happens, I want
my alarm handler to be invoked fast. If it's invoked in, say, 2
timeslices, that takes 2 msec. If HZ were set to 100, that would be 20
msec - way too long for my application. (note that soft real time is
NOT guaranteed)
Leave your Hz variable set to the default, and your jiffies wont expire
for 1.3 years.
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Steve Rosenbluth
Jim Henson's Creature Shop
2821 Burton St, Burbank CA
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