Re: [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64

[Wedson Almeida Filho]

On Fri, Jun 28, 2013 at 7:09 AM, Borislav Petkov <bp@xxxxxxxxx> wrote:

> Btw, do we have any perf data showing any improvements from this patch?

I wrote a simple test the measures the time it takes to acquire and
release  an uncontended mutex (i.e., we always take the fast path)
100k times. I ran it a few times, the original code averages
2.743436ms, and the new code averages 2.101098ms, so it's about 23% improvement.

I also think the code looks cleaner this way.
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