Messages in this thread | | | Date | Fri, 25 Nov 2005 11:26:19 +0100 | From | "Schultheiss, Christoph" <> | Subject | duration of udelay differs with activated realtime-preempt patch? |
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kernel: 2.6.14 with and without the realtime-preempt patch
hi list,
after measuring the duration of the function udelay (with oscilloscope at parallel port), I figured out that udelay (5usec) with activated realtime- preempt patch lasts a little bit longer. Without the patch the time is exact. All kernel debug switches are turned off at compile time. Can anyone suggest why this happens?
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