Messages in this thread | | | Subject | Re: [RFC PATCH v6 01/26] Documentation/x86: Add CET description | From | Yu-cheng Yu <> | Date | Tue, 20 Nov 2018 12:36:38 -0800 |
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On Tue, 2018-11-20 at 10:52 +0100, Ingo Molnar wrote: > * Yu-cheng Yu <yu-cheng.yu@intel.com> wrote: > > > +X86 Documentation > > [...] > > + > > +At run time, /proc/cpuinfo shows the availability of SHSTK and IBT. > > What is the rough expected performance impact of CET on average function > call frequency user applications and the kernel itself?
I don't have any conclusive numbers yet; but since currently only user-mode protection is implemented, I suspect any impact would be most likely to the application. The kernel would spend some small amount of time on the setup of CET.
Yu-cheng
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