Re: New experimental btrfs branch ready for testing

Chris Mason
2009-06-09T15:26:39Z

On Sat, Jun 06, 2009 at 11:38:45AM -0500, Steven Pratt wrote:
>
> No problem. Raid results are uploading to
> http://btrfs.boxacle.net/repository/raid/history/History.html now.
> There were massive improvements in the random write workloads,
> especially with cow enabled!! MailServer had moderate perf gains, but
> dramatic decrease in CPU utilization, so this is very good as well.
>
> The only regression I see is on large file creates, CPU is up 200% or
> more while performance is fairly flat. btrfs_tree_lock now dominates
> the profile.

I'm not able to reproduce the btrfs_tree_lock usage that you're seeing.
Could you please use the callgraph option to oprofile?

-chris