Re: No 100 HZ timer !

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 10 Apr 2001 13:12:14 +0100 (BST)


> 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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/