On Sat, 2013-06-15 at 09:30 +0200, Mike Galbraith wrote:

> Gee, just trying to flip back to a single semaphore lock mode if you had
> to do the global wait thing fixed up -rt.

But master wants a sharper rock tossed at it, it's still unstable.

Result matrix:
  Thread   0: 11190947
  Thread   1: 11743861
  Thread   2: 10039223
  Thread   3:  9776111
  Thread   4:  9734815
  Thread   5:  9941121
  Thread   6: 11604118
  Thread   7: 11716281
  Thread   8:  9828587
  Thread   9:  9589199
...

And that's one of the better samples.  Probably -rt sleepy locks help
get us flipped back to single sem lock mode.

Hohum.  On the bright side, -rt gets to scale better than mainline for a
little while, that's kinda different.

-Mike

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