Re: Recent Reaim results

[cliff white]

On Mon, 8 Mar 2004 14:40:50 -0800
Andrew Morton <akpm@xxxxxxxx> wrote:

> cliff white <cliffw@xxxxxxxx> wrote:
> >
> > 
> > Test results from the OSDL reaim test. 
> > The -mm kernels now appear to be scaling a bit nice.
> > I dunno why, but the 8-ways like -mm2 :)
> 
> I think your'e playing with my mind.

It's not _me, it's those STP robots. :)
> 
> > The is the 'database' load, a mixture of IO and CPU activity.
> 
> What about file server load?

Also looking pretty okay on ext3, and sucking somewhat less
on the other filesystems.
 I run filesystem compares on two-ways, so the
delta is not as big.

2-CPU- 
linux-2.6.3		6055.26		0.0	ext3

2.6.4-rc1-mm2		6149.28		1.64    ext3
2.6.4-rc1		6004.18        -0.84    ext3

2.6.4-rc1-mm2		6061.28		0.1	jfs
2.6.4-rc2	        5977.53	       -1.36    jfs

2.6.4-rc1-mm2		6007.67	       -0.83    reiserfs
2.6.4-rc1		5836.39        -3.83    reiserfs

2.6.4-rc1-mm2		5801.30	       -4.44    xfs
2.6.4-rc1		5785.93	       -4.71    xfs
----
> 
> > 4-CPU  ( all AS )
> > linux-2.6.3		5313.36		0.0
> > 2.6.4-rc1		5218.87		-1.78
> > 2.6.4-rc1-mm2		5391.00 	1.46
> 
> I spent a boring evening with the file server load on 4-way x86 with six
> disks.  If I squinted at it hard enough I was able to discern a 1% slowdown
> due to O_DIRECT-vs-buffered-fix.patch, but it was pretty thin.

Gee, i told the STP robots to run the tests, and went out and had fun :)
We should talk, the robots would be your slaves, if you would but ask them. 
> 
> I didn't test the database load.

The db load mixes the IO with some compute stuff, it will always run faster
than the fserver load. 

cliffw

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