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SubjectRe: [patch] enabling APIC and NMI watchdog on UP systems
Ingo Molnar <> writes:

> that having all said, i'm not against a generic, nonpriviledged (kernel
> based) performance counter API within the kernel (if there is demand), and
> such an API should of course have close control over the contents of the
> performance counter registers, and in this case the NMI oopser has to
> cooperate. Something like doing per-process performance monitoring and
> potentially switching the MSRs on task-switch.

regarding perf. counters, there is also the PAPI initiative, standard
*user level* API :

Performance Data Standard and API

Linux 2.2 and 2.4 (CVS) are actively supported with a patch. Probably
PAPI developers would also be glad to have a standard linux kernel API.

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