Messages in this thread | | | Date | Wed, 3 Sep 2003 21:49:50 -0700 | From | "David S. Miller" <> | Subject | Re: Scaling noise |
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On Wed, 3 Sep 2003 08:39:01 -0700 Larry McVoy <lm@bitmover.com> wrote:
> It's really easy to claim that scalability isn't the problem. Scaling > changes in general cause very minute differences, it's just that there > are a lot of them. There is constant pressure to scale further and people > think it's cool.
So why are people still going down this path?
I'll tell you why, because as SMP issues start to embark upon the mainstream boxes people are going to find clever solutions to most of the memory sharing issues that cause all the "lock overhead".
Things like RCU are just the tip of the iceberg. And think Larry, we didn't have stuff like RCU back when you were directly working and watching people work on huge SMP systems.
I think it's instructive to look at hyperthreading from another angle in this argument, that the cpu people invested billions of dollars in work to turn memory latency into free cpu cycles.
Put that in your pipe and smoke it :-) - 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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