RELENG_10 performance regression (was Re: 35-40% performance drop releng9 vs releng10 openvpn

Tue Mar 24 23:26:10 UTC 2015

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On 03/21/2015 14:42, Konstantin Belousov wrote:
> It seems to be a consequnce of the code from r222869.  The 
> test_tsc() does not trust the P-state invariant report and 
> explicitely check for the family.  Your CPU family is 0x14, while 
> code only bumps TSC priority for family 0x15+.

We need to find out whether the Bobcat cores have well-synchronized
TSCs.  If it does, we can white-list it, too.  However, I doubt it.

Sorry for the late response,

Jung-uk Kim
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