Re: NUMA balancing degrading performance

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On Tue, Oct 28, 2014 at 10:57:37PM +0100, Andreas Hollmann wrote:
> Hi Martin,
>=20
> I had some time to run NPB.
>=20
> LU-HP is not available in NPB 3.3.1, so I used LU instead.
>=20
> With numa balance enabled
> Enabling this option increases the runtime by more then 50 % in the worst=
 case.

Andreas,

Thank you for taking the time to run it in your computer. I ran LU from
NPB 3.1.1 and got results similar to yours (up to 50% performance loss).
Do you have any idea/guess what might be causing it?

Do you know of any benchmark that improves with the automatic NUMA
balancing? I'd like to see how that goes on my machine.

Thanks,
Martin

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