Adrian Bunk <[email protected]> writes:
>
> Subject : x86_64: NR_IRQ increase causes 11.5% slowdown
> in lmbench's fork benchmark
> References : http://lkml.org/lkml/2006/11/2/192
> Submitter : Tim Chen <[email protected]>
> Caused-By : Eric W. Biederman <[email protected]>
> commit 550f2299ac8ffaba943cf211380d3a8d3fa75301
> Handled-By : Eric W. Biederman <[email protected]>
> Andi Kleen <[email protected]>
> Status : problem is being debugged
Currently I'm at a loss why the cross cpu fork lm_bench numbers should get
worse when you simply double NR_IRQS. As far as I can determine nothing
on that code path is directly affected by that change.
Eric
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