Re: [RFC] [Patch 4/4] lock contention tracking slimmed down

Ingo Molnar
2007-06-07T10:21:39Z

* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

> we have around 1400 locks in the kernel, this would give 414400 per cpu.
>
> vs the old code:
>
> 2048*(4*8) = 65536
> +
> 2048*(4*4*8 + 4*8) = 327680 per cpu
>
> worst case
>
> I'm not convinced 300 lines less code is worth that extra bloat.

agreed, this is not worth it. It would be acceptable if the statistics
stuff was flexible enough to have the same footprint as the current
lockstat data structures.

Ingo