Re: No 100 HZ timer !

schwidefsky
2001-04-10T07:29:17Z

>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.
This part is architecture dependent. For S/390 I choose to do a "STCK" on
every
system entry/exit. Dunno if this can be done on other architectures too, on
S/390
this is reasonably cheap (one STCK costs 15 cycles). That means the
kernel/user CPU
time accounting is MUCH better now.

blue skies,
Martin

Linux/390 Design & Development, IBM Deutschland Entwicklung GmbH
Schönaicherstr. 220, D-71032 Böblingen, Telefon: 49 - (0)7031 - 16-2247
E-Mail: schwidefsky@de.ibm.com