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SubjectRe: Microstate Accounting for 2.6.11
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Andrew Morton <akpm@osdl.org> writes:

> Why does the kernel need this feature?
>
> Have you any numbers on the overhead?

It does RDTSC and lots of complicated stuff twice for each system call.
On P4 this will be extremly slow (> 1000cycles combined)
It is pretty unlikely that whatever it does justifies this extreme
overhead in a critical fast path.

-Andi
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