Chris Mason wrote:
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?
Ok, back from vacation and have re-engaged my brain :-) Was thinking I
would have to re-run this for you, but we already have callgraph data
for all the runs. For the 128 thread create workload it is here:
http://btrfs.boxacle.net/repository/raid//2-6-30-rc7-newformat/btrfs-6-2-newformat/btrfs1.ffsb.large_file_creates__threads_0128.09-06-04_01.23.30/analysis/oprofile.breakout.001/oprofile-callgraph
Steve
-chris
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