On Thu, Jul 27, 2000 at 05:34:54PM -0700, H. Peter Anvin wrote:
> I don't think we want to do this! IMO, HZ should not get exported to
> user space *AT ALL*. Instead, for the few interfaces that need it,
> we'll export a "user space HZ" (USER_HZ) which is fixed. No need for
> a kernel hack. When we support nonstandard values for HZ, we need to
> fix the few interfaces that actually export jiffies values to convert
> from "user jiffies" to real jiffies.
I think the point is less HZ as unit (it shouldn't be a user visible one),
but some programs want to know the timer tick to adapt themselves to it; e.g.
to calibrate their timers. Of course it is only an approximation because
timer events can always be late in a multitasking environment, but it
usually should work out.
-Andi
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