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(parent: 01d7c60) | patch
x86: kvmclock: drop rdtsc_barrier()
authorMarcelo Tosatti <mtosatti@redhat.com>
Sat, 25 Apr 2015 01:36:14 +0000 (22:36 -0300)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 7 May 2015 09:29:48 +0000 (11:29 +0200)
commita5e93d3ee3317691f078f5bcad577cd5174ad862
tree07568d723daf0d61489c53bb037627d36f36878dtree | snapshot
parent01d7c60ee4cf4c679c5acbf1fd2b59c831b78b58commit | diff
x86: kvmclock: drop rdtsc_barrier()

Drop unnecessary rdtsc_barrier(), as has been determined empirically,
see 1904907fabef98c109188aaa97ecfe0130edbb31 for details.

Noticed by Andy Lutomirski.

Improves clock_gettime() by approximately 15% on
Intel i7-3520M @ 2.90GHz.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/include/asm/pvclock.h diff | blob | history
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