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

On 16-Jan-2007 Attilio Rao wrote:
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

This is good stuff! I tried your patch on a performance-critical
system that I've been working on. Without going into a lot of detail,
it's a bunch of in-kernel code that blasts packets back and forth
between pairs of gigabit interfaces. Userland isn't involved at
all. Running 4 gigabit ports in this way on a Dell 1950 with 4 CPU
cores running at 3.0 GHz, I got about 4% better performance (in
terms of packets per second) using your patch. That's a pretty good
improvement, considering that the design makes some effort to avoid
lock contention.

John
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