kernel_optimize_test/arch/x86
Thomas Gleixner e9623b3559 x86: disable mwait for AMD family 10H/11H CPUs
The previous revert of 0c07ee38c9 left
out the mwait disable condition for AMD family 10H/11H CPUs.

Andreas Herrman said:

It depends on the CPU. For AMD CPUs that support MWAIT this is wrong.
Family 0x10 and 0x11 CPUs will enter C1 on HLT. Powersavings then
depend on a clock divisor and current Pstate of the core.

If all cores of a processor are in halt state (C1) the processor can
enter the C1E (C1 enhanced) state. If mwait is used this will never
happen.

Thus HLT saves more power than MWAIT here.

It might be best to switch off the mwait flag for these AMD CPU
families like it was introduced with commit
f039b75471 (x86: Don't use MWAIT on AMD
Family 10)

Re-add the AMD families 10H/11H check and disable the mwait usage for
those.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-17 22:57:20 +02:00
..
boot x86: relocs ELF handling - use SELFMAG instead of numeric constant 2008-05-04 20:04:45 +02:00
configs x86: add optimized inlining 2008-04-26 17:44:55 +02:00
crypto [CRYPTO] aes-x86-32: Remove unused return code 2008-04-21 10:19:21 +08:00
ia32 signals: x86 TS_RESTORE_SIGMASK 2008-04-30 08:29:37 -07:00
kernel x86: disable mwait for AMD family 10H/11H CPUs 2008-05-17 22:57:20 +02:00
kvm KVM: MMU: Allow more than PAGES_PER_HPAGE write protections per large page 2008-05-04 14:44:49 +03:00
lguest x86: replace remaining __FUNCTION__ occurances 2008-04-17 17:40:57 +02:00
lib x86: fix csum_partial() export 2008-05-13 19:38:47 +02:00
mach-default
mach-es7000
mach-generic x86: coding style fixes to arch/x86/mach-generic/bigsmp.c 2008-04-17 17:40:48 +02:00
mach-rdc321x x86, rdc321x: remove watchdog file 2008-04-17 17:40:50 +02:00
mach-visws x86: fix compilation error in VisWS 2008-04-24 23:15:44 +02:00
mach-voyager x86, voyager: fix ioremap_nocache() 2008-04-30 23:15:34 +02:00
math-emu x86, fpu: split FPU state from task struct - v5 2008-04-19 19:19:55 +02:00
mm x86: fix crash on cpu hotplug on pat-incapable machines 2008-05-17 22:57:20 +02:00
oprofile x86: oprofile: remove NR_CPUS arrays in arch/x86/oprofile/nmi_int.c 2008-04-19 19:44:58 +02:00
pci x86/PCI: X86_PAT & mprotect 2008-05-13 09:51:54 -07:00
power x86: coding style fixes to arch/x86/power/cpu_32.c 2008-04-17 17:40:50 +02:00
vdso x86: vdso ELF handling - use SELFMAG instead of numeric constant 2008-05-04 20:04:45 +02:00
video x86: video/fbdev.c: add MODULE_LICENSE 2008-05-04 20:04:46 +02:00
xen pageflags: use proper page flag functions in Xen 2008-04-28 08:58:22 -07:00
Kconfig x86: rdc: leds build/config fix 2008-05-10 19:31:45 +02:00
Kconfig.cpu x86: CONFIG_X86_ELAN fix 2008-04-30 23:15:35 +02:00
Kconfig.debug x86: Mark OPTIMIZE_INLINING broken 2008-04-30 20:07:22 -07:00
Makefile x86: add subarch support (for headers) to x86_64 2008-04-17 17:41:01 +02:00
Makefile_32.cpu