Messages in this thread | | | Date | Tue, 20 Feb 2001 13:46:18 -0500 (EST) | From | Ingo Molnar <> | Subject | Re: [PATCH] 2.4.1-ac UP-APIC updates |
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On Tue, 20 Feb 2001, Mikael Pettersson wrote:
> * NMI rate reduction for UP-APIC: the 100Hz default rate is excessive for > normal systems, 1Hz suffices. It turns out we cannot start at 1Hz due to > this interacting badly with check_nmi_watchdog() and the watchdog itself, > so the rate is reduced after check_nmi_watchdog() is done.
i dont like this one. 100 times a second makes absolutely no performance difference whatsoever - but eg. i'm driving kernel profiling from the NMI handler to get profiles of eg. IRQ handlers and other cli()-ed code areas.
another reason is that if NMIs intaract with anything else in the system, we'll have much better chances to hit it with 100 Hz than with 1 Hz.
Ingo
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