Blogbench RAID benchmarks

Francois Tigeot ftigeot at
Mon Jul 18 23:23:55 PDT 2011

On Tue, Jul 19, 2011 at 12:45:55AM -0400, Venkatesh Srinivas wrote:
> Could you give blogbench a try with vm.randomize_mmap = 1? I don't
> think the I/O performance will change, but I think you will see less
> contention on vm_token. (mmap times will be shorter...)

I tried it briefly, performance results were the same.

I saw almost no threads in vm_token state with these last tests; it only
happened when there was much more memory which could be used for caches
(8GB or more).

Francois Tigeot

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