Mike Tancsa wrote on 03/20/2015 22:02:
OK, I think I found where the RELENG_10 performance loss happened. It seems
https://lists.freebsd.org/pipermail/svn-src-stable-10/2015-March/004778.html
is the issue.
Testing with a kernel from r279796 I get 76-77Mb of throughput. With
r279848 it drops to about 60Mb
I am surprised by this huge performance drop.
If it is really caused by this change (VFS timestamp precision from
seconds to microseconds), wasn't this change tested before commit?
Miroslav Lachman
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