Messages in this thread | | | Subject | Re: No 100 HZ timer ! | Date | Tue, 10 Apr 2001 13:12:14 +0100 (BST) | From | Alan Cox <> |
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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.
Measure the number of clocks executing a timer interrupt. rdtsc is fast. Now consider the fact that out of this you get KHz or better scheduling resolution required for games and midi. I'd say it looks good. I agree the accounting of user/system time needs care to avoid slowing down syscall paths
Alan
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