2 Commits

Author	SHA1	Message	Date
Bruce Rogers	d69748463c	sys_membarrier: fix up include directives ... Our rule right now is to use <> for external headers only. util/sys_membarrier.c violates that. Fix it up. Signed-off-by: Bruce Rogers <brogers@suse.com> Message-Id: <20180329151018.15319-1-brogers@suse.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>	2018-04-05 14:37:38 +02:00
Paolo Bonzini	a40161cbe9	membarrier: add --enable-membarrier ... Actually enable the global memory barriers if supported by the OS. Because only recent versions of Linux include the support, they are disabled by default. Note that it also has to be disabled for QEMU to run under Wine. Before this patch, rcutorture reports 85 ns/read for my machine, after the patch it reports 12.5 ns/read. On the other hand updates go from 50 *micro*seconds to 20 *milli*seconds. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>	2018-03-12 16:12:47 +01:00