[PATCH] Mantaining turnstile aligned to 128 bytes in i386 CPUs

[Attilio Rao]

2006/7/28, Attilio Rao <attilio at freebsd.org>:
>
> After some thinking, I think it's better using init/fini methods
> (since they hide the sizeof(struct turnstile) with size parameter).
>
> Feedbacks and comments are welcome:
> http://users.gufi.org/~rookie/works/patches/uma_sync_init.diff

[CC'ed all the interested people]

Even if a long time is passed I did some benchmarks based on ebizzy tool.
This program claims to reproduce a real httpd server behaviour and is
used into the Linux world for benchmarks, AFAIK.
I think that results of the comparison on this patch is very
interesting, and I think it worths a commit :)
I think that results can be even better on a Xeon machine (I had no
chance to reproduce this on some of these).
(Results taken in consideration have been measured after some starts,
in order to minimize caching differences).

The patch:
http://users.gufi.org/~rookie/works/patches/ts-sq/ts-sq.diff

The benchmark results:
http://users.gufi.org/~rookie/works/patches/ts-sq/ts-sq.benchmark

The kernel options file:
http://users.gufi.org/~rookie/works/patches/ts-sq/CURRENT

For any information, comment, etc. please feel free to contact me.

Attilio


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