Messages in this thread | | | Date | Sun, 9 Dec 2001 00:46:22 +1100 | From | Anton Blanchard <> | Subject | Re: [Lse-tech] [RFC] [PATCH] Scalable Statistics Counters |
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Hi,
> > There's several things where per cpu data is useful; low frequency > > statistics is not one of them in my opinion. > > ...which may be true for 4-ways and even 8-ways but when you get to > 32-ways and greater, you start seeing cache problems. That was the > case on AIX and per-cpu counters was one of the changes that helped > get the spectacular scalability on Regatta.
I agree there are large areas of improvement to be done wrt cacheline ping ponging (see my patch in 2.4.17-pre6 for one example), but we should do our own benchmarking and not look at what AIX has been doing.
Anton (ppc64 Linux Hacker) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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