Messages in this thread | | | From | schwidefsky@de ... | Date | Tue, 10 Apr 2001 14:54:31 +0200 | Subject | Re: No 100 HZ timer ! |
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>Does not sound very attractive all at all on non virtual machines (I see the point on >UML/VM): >making system entry/context switch/interrupts slower, making add_timer slower, just to >process a few less timer interrupts. That's like robbing the fast paths for a slow path. The system entry/exit/context switch is slower. The add_timer/mod_timer is only a little bit slower in the case a new soonest timer event has been created. I think you can forget the additional overhead for add_timer/mod_timer, its the additional path length on the system entry/exit that might be problematic.
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
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