kernel_optimize_test/arch/i386
Venkatesh Pallipadi 991528d734 ACPI: Processor native C-states using MWAIT
Intel processors starting with the Core Duo support
support processor native C-state using the MWAIT instruction.
Refer: Intel Architecture Software Developer's Manual
http://www.intel.com/design/Pentium4/manuals/253668.htm

Platform firmware exports the support for Native C-state to OS using
ACPI _PDC and _CST methods.
Refer: Intel Processor Vendor-Specific ACPI: Interface Specification
http://www.intel.com/technology/iapc/acpi/downloads/302223.htm

With Processor Native C-state, we use 'MWAIT' instruction on the processor
to enter different C-states (C1, C2, C3).  We won't use the special IO
ports to enter C-state and no SMM mode etc required to enter C-state.
Overall this will mean better C-state support.

One major advantage of using MWAIT for all C-states is, with this and
"treat interrupt as break event" feature of MWAIT, we can now get accurate
timing for the time spent in C1, C2, ..  states.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-10-14 00:35:39 -04:00
..
boot [PATCH] Some config.h removals 2006-10-01 00:39:34 -07:00
crypto [CRYPTO] api: Get rid of flags argument to setkey 2006-09-21 11:41:02 +10:00
kernel ACPI: Processor native C-states using MWAIT 2006-10-14 00:35:39 -04:00
lib [PATCH] kernel-doc: fix function name in usercopy.c 2006-10-11 11:14:24 -07:00
mach-default [PATCH] irq-flags: i386: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
mach-es7000
mach-generic [PATCH] i386: Replace i386 open-coded cmdline parsing with 2006-09-26 10:52:32 +02:00
mach-visws IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
mach-voyager [VOYAGER] fix up ptregs removal mess 2006-10-12 22:25:03 -05:00
math-emu
mm [PATCH] mm: use symbolic names instead of indices for zone initialisation 2006-10-11 11:14:14 -07:00
oprofile [PATCH] oprofile: ppro: need to enable/disable all the counters 2006-09-29 09:18:11 -07:00
pci [PATCH] i386/x86_64: FIX pci_enable_irq to set dev->irq to the irq number 2006-10-08 12:24:02 -07:00
power [PATCH] Change the name of pagedir_nosave 2006-09-26 08:49:01 -07:00
defconfig [PATCH] i386: Update defconfig 2006-10-05 18:47:21 +02:00
Kconfig Attack of "the the"s in arch 2006-10-03 22:21:02 +02:00
Kconfig.cpu [PATCH] uml: fix processor selection to exclude unsupported processors and features 2006-10-11 11:14:20 -07:00
Kconfig.debug [PATCH] lockdep: irqtrace subsystem, i386 support 2006-07-03 15:27:03 -07:00
Makefile [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder 2006-09-26 10:52:41 +02:00
Makefile.cpu