Messages in this thread | | | From | "Ulrich Windl" <> | Date | Mon, 15 Sep 1997 10:19:12 +0200 | Subject | loops_per_sec |
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I was playing with nanosleep() and SCHED_FIFO, precisely with 500ns delays on a P100. As I suspected some problem I inspected the code.
nanosleep() calls udelay() which in turn only has 1 microsecond resolution.
Therefore I tried to find udelay(). Was a bit tricky as it's in a include file. Well I saw that udelay uses delay() in turn, and that uses loops_per_sec. All old news you'd say, so far.
Then I wondered who sets loops_per_sec, and I found out that a _lot_ of code uses loops_per_sec directly to call delay(). As I think udelay() is rather new in Linux, I'd suggest to modify the obsolete code to use udelay() (unless a delay shorter than 1 microsecond is used).
Ulrich P.S. Sorry, no patch...
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