Re: 2.5.69-mm8

Martin J. Bligh
2003-05-23T06:05:21Z

> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.69/2.5.69-mm8/
>
> . One anticipatory scheduler patch, but it's a big one. I have not stress
> tested it a lot. If it explodes please report it and then boot with
> elevator=deadline.
>
> . The slab magazine layer code is in its hopefully-final state.
>
> . Some VFS locking scalability work - stress testing of this would be
> useful.

Well, unsure about the problems I reported earlier - seems to be related
to modem disconnects during SDET runs ... the hung session seems to lock
up the system somehow. But that could have been around for ages - I'll
try to be more scientific about reproducing it at some point.

SDET results are about the same, kernel compile is down a bit on systime
(16-way NUMA-Q)

Kernbench: (make -j vmlinux, maximal tasks)
Elapsed System User CPU
2.5.69-mm7 46.58 117.00 578.47 1492.00
2.5.69-mm8 46.09 115.11 570.74 1487.25

1004 2.0% default_idle
272 8.3% __copy_from_user_ll
129 1.7% __d_lookup
79 7.5% link_path_walk
...
-50 -1.3% find_get_page
-55 -1.5% zap_pte_range
-66 -6.5% file_move
-74 -1.2% page_add_rmap
-80 -0.6% do_anonymous_page
-110 -6.9% schedule
-139 -7.0% atomic_dec_and_lock
-698 -0.4% total
-1139 -4.6% page_remove_rmap

Not sure quite what that's all about, but there it is ;-)