Re: [PATCH 2/7] locking/rwsem: more aggressive use of optimistic spinning

[Mike Galbraith]

On Fri, 2014-08-15 at 13:58 -0400, Waiman Long wrote:

> Thank for the testing recipe. I am afraid that I can't find a 500TB SSD 
> for testing purpose. Do you think the test will still be valid for 
> exercising rwsem if I use a smaller SSD or maybe mechanical hard disk?

I suspect fs_mark will fit in less than a cubic meter of silicon.  You
definitely don't want to use a 400GB USB2 drive to find out though. 

FSUse%        Count         Size    Files/sec     App Overhead
     0       800000            0      22474.9          5551907
     0      1600000            0       1550.0        314304154
     0      2400000            0        832.3        928216719

zzzzz... nope, nobody is _that_ bored ^C 

(starts xfs_repair, perf top.. snort)

Nope, you definitely don't want USB2 crapware for that either :)

	-Mike

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