Messages in this thread | | | Date | Tue, 17 Dec 2013 14:14:56 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 2/3] x86: mm: Change tlb_flushall_shift for IvyBridge |
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* Alex Shi <alex.shi@linaro.org> wrote:
> > Building the kernel is obviously a prime workload - and given that > > the kernel is active only about 10% of the time for a typical > > kernel build, a 1-2% speedup means a 10-20% speedup in kernel > > performance (which sounds a bit too good at first glance). > > Maybe a extra time tlb flush causes more tlb refill that cost much > user space time.
All these things are measurable, that way maybes can be converted into certainty.
Thanks,
Ingo
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