Re: [PATCH] Clustering indirect blocks in Ext3

["Kyungmin Park" <kmpark@infradead.org>]

Hi,

> >
> > Setup: 4 cpu, 8GB RAM, 400GB disk.
> >
> > Average vanilla results
> > ==========================================================================
> > intial create total runs 30 avg 46.49 MB/s (user 1.12s sys 2.25s)
> > create total runs 5 avg 12.90 MB/s (user 1.08s sys 1.97s)
> > patch total runs 4 avg 8.70 MB/s (user 0.60s sys 2.31s)
> > compile total runs 7 avg 21.44 MB/s (user 0.32s sys 2.95s)
> > clean total runs 4 avg 59.91 MB/s (user 0.05s sys 0.26s)
> > read tree total runs 2 avg 21.85 MB/s (user 1.12s sys 2.89s)
> > read compiled tree total runs 1 avg 23.47 MB/s (user 1.45s sys 4.89s)
> > delete tree total runs 2 avg 13.18 seconds (user 0.64s sys 1.02s)
> > no runs for delete compiled tree
> > stat tree total runs 4 avg 4.76 seconds (user 0.70s sys 0.50s)
> > stat compiled tree total runs 1 avg 7.84 seconds (user 0.74s sys 0.54s)
> >
> > Average metaclustering results
> > ==========================================================================
> > intial create total runs 30 avg 45.04 MB/s (user 1.13s sys 2.42s)
> > create total runs 5 avg 15.64 MB/s (user 1.08s sys 1.98s)
> > patch total runs 4 avg 10.50 MB/s (user 0.61s sys 3.11s)
> > compile total runs 7 avg 28.07 MB/s (user 0.33s sys 4.06s)
> > clean total runs 4 avg 83.27 MB/s (user 0.04s sys 0.27s)
> > read tree total runs 2 avg 21.17 MB/s (user 1.15s sys 2.91s)
> > read compiled tree total runs 1 avg 22.79 MB/s (user 1.38s sys 4.89s)
> > delete tree total runs 2 avg 9.23 seconds (user 0.62s sys 1.01s)
> > no runs for delete compiled tree
> > stat tree total runs 4 avg 4.72 seconds (user 0.71s sys 0.50s)
> > stat compiled tree total runs 1 avg 6.50 seconds (user 0.79s sys 0.53s)
> >
> > Overall, metaclustering does better than vanilla except in a few cases.
>

I think above testcases are just run with normal I/O case.
Did you test the direct I/O test with this patch?
With metaclustering patch, I can't run 'fsstress' since it oops when direct I/O.
or is it dependent on other ext3 patches?
Since I tested it with latest kernel 2.6.24-rc3 instead of mm kernel.

Thank you,
Kyungmin Park