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SubjectRe: 2.5.33-mm1
On Mon, Sep 02, 2002 at 09:16:44PM -0700, Andrew Morton wrote:
> Seven new patches - mostly just code cleanups.
> +slablru-speedup.patch
> A patch to improve slablru cpu efficiency. Ed is
> redoing this.

count_list() appears to be the largest consumer of cpu after this is
done, or so say the profiles after running updatedb by hand on
2.5.33-mm1 on a 900MHz P-III T21 Thinkpad with 256MB of RAM.

4608 __rdtsc_delay 164.5714
2627 __generic_copy_to_user 36.4861
2401 count_list 42.8750
1415 find_inode_fast 29.4792
1325 do_anonymous_page 3.3801

It also looks like there's either a bit of internal fragmentation or a
missing kmem_cache_reap() somewhere:

ext3_inode_cache: 20001KB 51317KB 38.97
dentry_cache: 4734KB 18551KB 25.52
radix_tree_node: 1811KB 1923KB 94.20
buffer_head: 1132KB 1378KB 82.12

It does stay quite a bit more nicely bounded than without slablru though.

Maybe it's old news. Just thought I'd try running a test on something tiny
for once. (new kbd/mouse config options were a PITA BTW)

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