Messages in this thread | | | From | "Manfred Spraul" <> | Subject | Re: Serial port latency | Date | Thu, 22 Mar 2001 22:45:58 +0100 |
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Is the computer otherwise idle? I've seen one unexplainable report with atm problems that disappeared (!) if a kernel compile was running.
Could you try to run a simple cpu hog (with nice 20)?
<< main() { for(;;) getpid(); } <<
I'm aware of one bug that could cause a delay of up to 20 ms (cpu_idle() doesn't check for pending softirq's before sleeping), but that doesn't explain your 500 ms delay.
-- Manfred
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