Re: 2.5.70-mm1

Andrew Morton
2003-05-29T18:39:16Z

"Martin J. Bligh" <mbligh@aracnet.com> wrote:
>
> > SDET 128 (see disclaimer)
> > Throughput Std. Dev
> > 2.5.66-mm2 100.0% 0.6%
> > 2.5.66-mm2-ext3 3.9% 0.4%
> >
> > SDET 128 (see disclaimer)
> > Throughput Std. Dev
> > 2.5.70-mm1-ext2 100.0% 0.1%
> > 2.5.70-mm1-ext3 22.7% 2.0%
>
> Andrew pointed out I should turn off extended attributes, I reran
> like this ... not much change (with error margins)
>
> SDET 32 (see disclaimer)
> Throughput Std. Dev
> 2.5.70-mm1-ext2 100.0% 0.2%
> 2.5.70-mm1-ext3 30.9% 7.8%
> 2.5.70-mm1-noxa 34.6% 6.5%

OK, a 10x improvement isn't too bad. I'm hoping the gap between ext2 and
ext3 is mainly idle time and not spinning-on-locks time.

>
> 2024927 267.3% total
> 1677960 472.8% default_idle
> 116350 0.0% .text.lock.transaction
> 42783 0.0% do_get_write_access
> 40293 0.0% journal_dirty_metadata
> 34251 6414.0% __down
> 27867 9166.8% .text.lock.attr

Bah. In inode_setattr(), move the mark_inode_dirty() outside
lock_kernel().

> 20016 2619.9% __wake_up
> 19632 927.4% schedule
> 12204 0.0% .text.lock.sched
> 12128 0.0% start_this_handle
> 10011 0.0% journal_add_journal_head

hm, lots of context switches still.