On Wed, 2011-06-15 at 13:52 +0200, Peter Zijlstra wrote:

/me goes re-test without the sirq-rcu bits mixed in just to make sure.

I switched from PREEMPT=n to PREEMPT_VOLUNTARY=y, which seemed to make a
difference:

.39             257.651 messages/sec/core
-tip            254.976 messages/sec/core
    +linus      258.03  messages/sec/core
    +sirq       265.951 messages/sec/core


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