Hello,
> Can you run oprofile on the older kernel, so that we can compare and see where the time is spent?
> Looks like over 7% of the time is spent in s_lock, which suggests some change in behavior in context switching or something like that, but let's see what the old profile looks like.
I grabbed the 2.6.28.2 as a loaner from prod boxes I had around, may take a while to do that again.
Will see if I can get some nehalem loaners (or do these tests at other environment) to do more modern hardware comparison.
Domas