Re: Testing 7.0 Beta: FFS still very slow when creating files

["J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>]

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)