> > interrupting decrementer. (i.e just about any modern chip)
>
> Just how would you do kernel/user CPU time accounting then ? It's currently done
> on every timer tick, and doing it less often would make it useless.
On the contrary doing it less often but at the right time massively improves
its accuracy. You do it on reschedule. An rdtsc instruction is cheap and all
of a sudden you have nearly cycle accurate accounting
Alan
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This archive was generated by hypermail 2b29 : Sun Apr 15 2001 - 21:00:12 EST