On Thu, 30 Apr 2009 20:32:00 +0100 (BST) Robert Watson <[email protected]> wrote:
> > On Thu, 30 Apr 2009, Oliver Pinter wrote: > > > Is the FreeBSD's FS management so slow? > > > > http://www.netbsd.org/~ad/50/img15.html > > > > Or so big is the difference between the two cpu scheduler? > > Also, there's a known and serious performance regression in CAM > relating to tgged queueing, and the generic disk sort routine, > introduced 7.1, which will be fixed in 7.2. I can't speak more > generally to the benchmarks -- we'll need to run them in a controlled > environment and see if we can reproduce the results. > Well, there is also r185801 of vfs_cache.c which all but destroys the usefulness of negative name caching and surely can account for a large percentage of reported performance drop in 7.1, especially with build.sh benchmarks. The bug was fixed in stable/7 soon after 7.1 was released. -- Alexander Kabaev
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