Chris Mason wrote:
On Thu, Sep 17, 2009 at 05:04:11PM -0500, Steven Pratt wrote:
Chris Mason wrote:
On Thu, Sep 17, 2009 at 04:17:14PM -0400, Chris Mason wrote:
[ crashes on runs involving unmounts ]
The run is still going here, but it has survived longer than before.
I'm trying with Yan Zheng's patch:
From: Yan Zheng <zheng.yan@xxxxxxxxxx>
Date: Fri, 11 Sep 2009 16:11:19 -0400
Subject: [PATCH] Btrfs: improve async block group caching
Quick update, I got through a full run of Steve's test with this
applied. I'll start a few more ;)
Seems to work for me too! Got through all the random write tests
with no problems. Will kick off full run overnight.
Thanks again.
I've updated the btrfs-unstable tree to include Yan Zheng's fix. I've
also included two more buffered writeback speedups, and I expect these
to make a difference on the multi-threaded tests.
I took a look at 1MB O_DIRECT writes, and the latencies of sending off
checksumming to the checksum threads seem to be the biggest problem. I
get full tput at 8MB O_DIRECT writes, so for now I'm going to leave this
one alone.
Updated performance results are available. Ran both the 9/16 tree +
async patches and the tree from 9/18. Results are a mixed bag, some
faster some slower.
http://btrfs.boxacle.net/repository/raid/history/History.html
Steve
-chris
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