Re: Are Linux pipes slower than the FreeBSD ones ?

[Dmitry Antipov]

Nick Piggin wrote:

> One thing to try is pinning both processes on the same CPU. This
> may be what the FreeBSD scheduler is preferring to do, and it ends
> up being really a tradeoff that helps some workloads and hurts
> others. With a very unscientific test with an old kernel, the
> pipe.c test gets anywhere from about 1.5 to 3 times faster when
> running it as taskset 1 ./pipe

Sounds interesting. What kernel version did you tried? Can you
send your .config to me?

I've tried this trick on 2.6.25-rc4, and got ~20% more throughput for
large (> 8K) buffers at the cost of going ~30% down for the small ones.

Dmitry
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