Re: [Patch] numa:x86_64: Cacheline aliasing makesfor_each_populated_zone extremely expensive -V2.

[Robin Holt]

> > I don't think this is stable material. It improves performance and does
> > not fix a bug. But I am not the one to decide this :-)
> 
> The only reason I think it qualifies is we are talking about 0.8% of each
> cpus time.  That means that on the 4096 cpu system, we are dedicating
> the equivalent of 32 cpus to just vmstat_update.  That feels like it

Wrong!  0.08%, not 0.8% and therefore 3.2 cpus, not 32.

Sorry for the confusion,
Robin
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/