> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Thursday, March 8, 2018 7:16 PM
>
> Instead of using RDMSR/WRMSR, on fsgsbase-capable systems use a
> double
> SWAPGS combined with RDGSBASE/WRGSBASE. This halves execution time
> for
> a shadow GS update alone on my Haswell (and we have indic
On 08/03/18 11:15, Jan Beulich wrote:
> Instead of using RDMSR/WRMSR, on fsgsbase-capable systems use a double
> SWAPGS combined with RDGSBASE/WRGSBASE. This halves execution time for
> a shadow GS update alone on my Haswell (and we have indications of
> good performance improvements by this on Sky
Instead of using RDMSR/WRMSR, on fsgsbase-capable systems use a double
SWAPGS combined with RDGSBASE/WRGSBASE. This halves execution time for
a shadow GS update alone on my Haswell (and we have indications of
good performance improvements by this on Skylake too), while the win is
even higher when e
