Re: [patch 00/10] [RFC] SLUB patches for more functionality, performanceand maintenance

[Martin Bligh]

Christoph Lameter wrote:
> On Sun, 8 Jul 2007, Andi Kleen wrote:
>
> > Christoph Lameter <clameter@xxxxxxx> writes:
> >
> > > A cmpxchg is less costly than interrupt enabe/disable
> > That sounds wrong.
>
> Martin Bligh was able to significantly increase his LTTng performance 
> by using cmpxchg. See his article in the 2007 proceedings of the OLS 
> Volume 1, page 39.
>
> His numbers were:
>
> interrupts enable disable : 210.6ns
> local cmpxchg             : 9.0ns

Those numbers came from Mathieu Desnoyers (LTTng) if you
want more details.

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