> From: Jan Beulich [mailto:[email protected]] > 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 <[email protected]>
Reviewed-by: Kevin Tian <[email protected]> _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
