On 03/01/2011 07:55 PM, Theodore Ts'o wrote:
Hi Eric (and the rest of the ext4 development team),
I still have some ext4 patches to merge, but all or most of the ones
that should affect performance are in the ext4 tree now. You can get
them via
git fetch git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git \
for-enw-benchmark
This patch series is based off of 2.6.38-rc5, plus one fixup commit,
3abb17e82f: "vfs: fix BUG_ON() in fs/namei.c:1461", which shouldn't be
performance relevant (FFSB doesn't use symlinks, which is probably why
you haven't noticed any problems).
This patch series has passed a large number of xfstests runs using 4k
and 1k block sizes. I am currently using this patch set merged with
2.6.38-rc7 on my laptop, and it "feels" faster, but could be becauses of
other optimizations and improvements that went in post-2.6.38, and it
could be because I've enabled CONFIG_SCHED_AUTOGROUP, not just the ext4
improvements :-) --- although commit b616844 could very well help
synchronous write workloads.
<snip>
Hi Ted:
My test results for this patch series are now available for review at:
http://free.linux.hp.com/~enw/ext4/2.6.38-rc5
For this set of runs, I've also tried reworking my old system
utilization graphs to better reflect per transaction efficiency ("CPU
Cost").
Thanks for the patches!
Eric
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