--On Wednesday, July 10, 2002 09:15:15 -0700 "Martin J. Bligh" <Martin.Bligh@us.ibm.com> wrote:

> 
> Updated patch below ...
> 
> 
>  arch/i386/kernel/i386_ksyms.c   |    5 ++
>  arch/i386/lib/usercopy.c        |   10 +++++
>  arch/i386/mm/fault.c            |   71 +++++++++++++++++++++++++++++++++++
>  fs/exec.c                       |   60 +++++++++++++++++++++---------
>  include/asm-i386/highmem.h      |    5 ++
>  include/asm-i386/kmap_types.h   |    3 +
>  include/asm-i386/processor.h    |    2 +
>  include/asm-ppc/kmap_types.h    |    1 
>  include/asm-sparc/kmap_types.h  |    1 
>  include/asm-x86_64/kmap_types.h |    1 
>  include/linux/highmem.h         |   80 ++++++++++++++++++++++++++++++++++++++++
>  include/linux/sched.h           |    5 ++
>  mm/filemap.c                    |   11 +++--
>  13 files changed, 232 insertions(+), 23 deletions(-)


Andrew and Martin,

	I ran this updated patch on 2.5.25 with dbench on
the 8-way with 4 Gb of memory compared to clean 2.5.25. 
I saw a significant improvement in throughput about 15%
(averaged over 5 runs each). 
	Included is the pretty picture (akpm-2525.png) the 
data that picture came from (akpm-2525.data) and the raw 
results of the runs with min/max and timing results 
(2525akpmkmaphi and 2525clnhi).
	I believe the drop at around 64 clients is caused by
memory swapping leading to increased disk accesses since the 
time increased by 200% in direct correlation with the decreased 
throughput.

Hanna