Re: top hogs CPU in 2.6: kallsyms_lookup is very slow

[Paulo Marques]

Denis Vlasenko wrote:
> On Thursday 16 September 2004 15:17, William Lee Irwin III wrote:
> > Did the kallsyms patches reduce the cpu overhead from get_wchan()?
>
>
> Yes. top does not hog CPU anymore. It takes even a liitle bit *less*
> CPU than in 2.4 now.

Great!

I was the one who wrote those patches, so I'm glad to know that they 
actually made a difference in real world workloads (like using "top").

Reading /proc/kallsyms should be a lot faster too, although there is no 
comparison with 2.4 kernel, because there where no kallsyms there. It 
can be compared with previous 2.6 kernels, though.

--
Paulo Marques - www.grupopie.com

To err is human, but to really foul things up requires a computer.
Farmers' Almanac, 1978
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