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 <jbeul...@suse.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
