lkml.org 
[lkml]   [2003]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.0-test2-mm3 osdl-aim-7 regression
Cliff White <cliffw@osdl.org> wrote:
>
>
> I see 2.6.0-test2-mm4 is already in our queue, so this may be
> Old News. ( serves me right for taking a weekend off )
> Performance of -mm3 falls off on the 4-cpu machines.
>
> 2-cpu ssytems
> Kernel JPM
> 2.6.0-test2-mm3 1313.53
> linux-2.6.0-test2 1320.68 (0.54 % +)
>
> 4-cpu systems
> 2.6.0-test2-mm3 4824.96
> linux-2.6.0-test2 5381.20 ( 11.53 % + )
>
> Full details at
> http://developer.osdl.org/cliffw/reaim/index.html
> code at
> bk://developer.osdl.org/osdl-aim-7
>

OK, I can reproduce this on 4way.

Binary searching (insert gratuitous rant about benchmarks that take more
than two minutes to complete) reveals that the slowdown is due to
sched-2.6.0-test2-mm2-A3.

So mm4 with everthing up to but not including sched-2.6.0-test2-mm2-A3:

Max Jobs per Minute 1467.06
Max Jobs per Minute 1478.82
Max Jobs per Minute 1473.36

3853.55s user 264.31s system 370% cpu 18:31.95 total

After adding sched-2.6.0-test2-mm2-A3:

Max Jobs per Minute 1375.63
Max Jobs per Minute 1278.40
Max Jobs per Minute 1293.11

4416.70s user 275.61s system 374% cpu 20:53.58 total

A 10% regression there, mainly user time.


The test is:

- build bk://developer.osdl.org/osdl-aim-7

- cd src

- time ./reaim -s4 -q -t -i4 -f./workfile.new_dbase -r3 -b -l./reaim.config



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:47    [W:0.105 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site