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Re: Testing 7.0 Beta: FFS still very slow when creating files
On 25 Aug 2014, at 17:39, Taylor R Campbell <riastradh%netbsd.org@localhost>
wrote:
> Date: Mon, 25 Aug 2014 15:55:53 +0200
> From: "J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>
>
> GCC 4.5.4 disabled builtin memcmp as x86 has no cmpmemsi pattern.
>
> See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052, Comment 16.
>
> Could this be the cause of this big loss in performance?
>
> Shouldn't be too hard to test this. Perhaps try dropping in the
> following replacements for the vcache key comparison and running the
> test for each one?
> <memequal.c>
We are talking about a kernel from 2012/09 -- vcache came much later.
--
J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig
(Germany)
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