Re: [PATCH 1/7] signals: reduce {setup,restore}_sigcontext sizes

[Ralf Baechle <ralf@linux-mips.org>]

On Tue, Jan 23, 2007 at 05:26:21PM +0100, Franck Bui-Huu wrote:

> No, I haven't. Since the size code has been reduced by a factor 2, I
> would think that signal code can better fit in instruction cache
> lines. For example, the loop is made up by 11 instructions (I don't
> know why gcc makes it so big though) which fits into 3 cache lines in
> my cases. Where as the old code generated 246 instructions for the
> same job, which should cause many more cache misses.
> 
> Do you have any pointers on benchmarks I could run ?

For stuff like this microbenchmarks like lmbench are best suited.  Lmbench
recently moved to http://sourceforge.net/projects/lmbench.

  Ralf