Re: [patch 02/23] SLUB: Rename NUMA defrag_ratio to remote_node_defrag_ratio

Christoph Lameter
2007-11-08T19:16:43Z

On Thu, 8 Nov 2007, Matt Mackall wrote:

> > I cannot figure out what the number of cycles currently showing on the TSC
> > have to do with a ratio :(. I could semi-understand if we were counting up
> > how many cycles were being spent trying to pack objects but that does not
> > appear to be the case. The comment didn't help a whole lot either. It felt
> > like a cost for packing, not a ratio
>
> It's just a random number generator. And a bad one: lots of arches
> return 0. And I believe at least one of them has some NUMA support.

Do we have a better one? Something with minimal processing overhead? I'd
be glad to switch it.