Re: [patch] Latency Tracer, voluntary-preempt-2.6.8-rc4-O6

[Andi Kleen]

Ingo Molnar <mingo@xxxxxxx> writes:

> * Lee Revell <rlrevell@xxxxxxxxxxx> wrote:
>
>> Interesting results.  One of the problems is kallsyms_lookup,
>> triggered by the printks:
>
> yeah - kallsyms_lookup does a linear search over thousands of symbols. 
> Especially since /proc/latency_trace uses it too it would be worthwile
> to implement some sort of binary searching.

Or just stick some cond_sched()s in there. It was designed to be slow,
but there are no locking issues.

-Andi

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