Re: [PATCH] dst_entry structure use,lastuse and refcnt abstraction

[David S. Miller]

From: Christoph Lameter <clameter@xxxxxxxxxxxx>
Date: Thu, 23 Jun 2005 23:03:45 -0700 (PDT)

> Ok. Then we are done. With 58 Itanium processors and 200G Ram I get 
> more than 10% improvement ;-). With 500 tasks we have 453 vs. 499 j/m/t.
> That is 9.21%. For 300 tasks we have 9.4% etc. I am sure that I can push 
> this some more with bigger counts of processors and also some other NUMA 
> related performance issues.

So it took 7 times more processors to increase the performance gain by
just over 3 on a microscopic synthetic benchmark.  That's not
impressive at all.

And you still haven't shown what happens for the workloads I
suggested.  A web benchmark, with say a thousand unique clients, would
be sufficient for one of those btw.  That case has very low dst
locality, yet dsts are useful because you'll have about 2 or 3
concurrent connections per dst.
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