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| author |   Andi Kleen <ak@suse.de> | 2007-05-02 19:27:21 +0200 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:21 +0200 |
| commit | c5bcb5635a03da3158f121ae20ccbbf72b4fc62a (patch) | |
| tree | a69fff3138ad14a7949d979f2d2e5893c5cb77de /arch | |
| parent | [PATCH] i386: Add X86_FEATURE_RDTSCP (diff) | |
| download | linux-dev-c5bcb5635a03da3158f121ae20ccbbf72b4fc62a.tar.xz linux-dev-c5bcb5635a03da3158f121ae20ccbbf72b4fc62a.zip | |
[PATCH] x86: Use RDTSCP for synchronous get_cycles if possible
RDTSCP is already synchronous and doesn't need an explicit CPUID.
This is a little faster and more importantly avoids VMEXITs on Hypervisors.
Original patch from Joerg Roedel, but reworked by AK
Also includes miscompilation fix by Eric Biederman
Cc: "Joerg Roedel" <joerg.roedel@amd.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions