> 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 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: Kevin Tian <kevin.t...@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
