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 Skylake too), while the win is > even higher when e.g. updating more than one base (as may and commonly > will happen in load_segments()). > > Signed-off-by: Jan Beulich <[email protected]>
Reviewed-by: Andrew Cooper <[email protected]> _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
