Messages in this thread |  | | Date | Sun, 19 Nov 2000 10:21:43 +0100 | From | Vojtech Pavlik <> | Subject | Re: rdtsc to mili secs? |
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On Sat, Nov 18, 2000 at 03:48:06PM -0800, H. Peter Anvin wrote: > Followup to: <20001118211349.B382@bug.ucw.cz> > By author: Pavel Machek <pavel@suse.cz> > In newsgroup: linux.dev.kernel > > > > Actually, on machines where RDTSC works correctly, you'd like to use > > > that to detect a lost timer interrupt. > > > > > > It's tough, it really is :( > > > > Well, my patch did not do that but you probably want lost timer > > interrupt detection so that you avoid false alarms. > > > > But that means you can no longer detect speed change after 10msec: > > > > going from 150MHz to 300MHz is very similar to one lost timer > > interrupt. > > > > That's the point.
... and, you still can have both - detection of lost timer interrupts and detection of speed changing. It'll take longer than 10ms to notice, though (I think 20 or 30 will just do it).
-- Vojtech Pavlik SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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