Messages in this thread | | | From | "Ulrich Windl" <> | Date | Fri, 5 Mar 1999 09:06:02 +0100 | Subject | 2.2.1 (possibly others as well): loosing 2 ticks even under light load |
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Hello, a notifier:
For debugging purposes I added a print statement to show lost ticks in the i386 kernel. On my Pentium 100 even for very light load the kernel declares having lost 2 ticks.
I don't know why this happend, but I see a problem: If the kernel looses 2 ticks on a light load, it might loose more ticks on heavy load. Unfortunately the non-TSC version of the timeoffset routine (using the timer chip's register) can only span one tick, possibly guessing that there's more than one, but not more.
Therefore losing over 1 tick might cause a bad time.
I have no idea how to find the parts that disable interrupts for that long...
Regards, Ulrich
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