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bde6f5f59c
android_kernel_xiaomi_sm8350/arch/x86/kernel
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Venki Pallipadi bde6f5f59c x86: voluntary leave_mm before entering ACPI C3 
Aviod TLB flush IPIs during C3 states by voluntary leave_mm()
before entering C3.

The performance impact of TLB flush on C3 should not be significant with
respect to C3 wakeup latency. Also, CPUs tend to flush TLB in hardware while in
C3 anyways.

On a 8 logical CPU system, running make -j2, the number of tlbflush IPIs goes
down from 40 per second to ~ 0. Total number of interrupts during the run
of this workload was ~1200 per second, which makes it ~3% savings in wakeups.

There was no measurable performance or power impact however.

[ akpm@linux-foundation.org: symbol export fixes. ]

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:01 +01:00
..
acpi x86: remove last users of FASTCALL 2008-01-30 13:31:16 +01:00
cpu x86: move definitions to processor.h 2008-01-30 13:31:39 +01:00
.gitignore .gitignore update for x86 arch 2007-10-17 21:19:04 +02:00
alternative.c x86: add set/clear_cpu_cap operations 2008-01-30 13:30:55 +01:00
aperture_64.c x86: clean up arch/x86/kernel/aperture_64.c printk()s 2008-01-30 13:30:10 +01:00
apic_32.c arch/x86/: spelling fixes 2008-01-30 13:31:42 +01:00
apic_64.c x86: adjust enable_NMI_through_LVT0() 2008-01-30 13:31:24 +01:00
apm_32.c x86: unify desc_struct 2008-01-30 13:31:11 +01:00
asm-offsets_32.c x86: unify struct desc_ptr 2008-01-30 13:31:12 +01:00
asm-offsets_64.c x86: unify tss_struct 2008-01-30 13:31:31 +01:00
asm-offsets.c
audit_64.c
bootflag.c
bugs_64.c
cpuid.c PM: Acquire device locks on suspend 2008-01-24 20:40:04 -08:00
crash_dump_32.c kmap leak fix for x86_32 kdump 2007-10-19 11:53:33 -07:00
crash_dump_64.c
crash.c x86: disable hpet legacy replacement for kdump 2007-12-03 17:17:10 +01:00
doublefault_32.c x86: unify tss_struct 2008-01-30 13:31:31 +01:00
ds.c x86, ptrace: new ptrace BTS API 2008-01-30 13:31:20 +01:00
e820_32.c x86 boot: use E820 memory map on EFI 32 platform 2008-01-30 13:31:19 +01:00
e820_64.c x86: prepare 64-bit architecture initialization for paravirt 2008-01-30 13:31:11 +01:00
early_printk.c [x86] remove uses of magic macros for boot_params access 2007-10-16 17:38:31 -07:00
early-quirks.c x86: clean up arch/x86/kernel/early-quirks.c 2008-01-30 13:31:26 +01:00
efi_32.c x86 boot: use E820 memory map on EFI 32 platform 2008-01-30 13:31:19 +01:00
efi_64.c x86: EFI runtime service support 2008-01-30 13:31:19 +01:00
efi_stub_32.S
efi_stub_64.S x86: EFI runtime service support 2008-01-30 13:31:19 +01:00
efi.c x86: EFI runtime service support 2008-01-30 13:31:19 +01:00
entry_32.S x86: move to .rodata/.init.data 2008-01-30 13:31:23 +01:00
entry_64.S sched: high-res preemption tick 2008-01-25 21:08:29 +01:00
genapic_64.c x86: convert cpu_to_apicid to be a per cpu variable 2007-10-19 20:35:03 +02:00
genapic_flat_64.c x86: convert cpu_to_apicid to be a per cpu variable 2007-10-19 20:35:03 +02:00
geode_32.c
head64.c x86: do not set boot cpu in cpu_online_map at x86_64_start_kernel() 2008-01-30 13:30:46 +01:00
head_32.S fix lguest rmmod "bad pgd" 2008-01-01 11:30:35 -08:00
head_64.S x86: turn priviled operation into a macro in head_64.S 2008-01-30 13:31:10 +01:00
hpet.c x86: remove duplicate includes 2008-01-30 13:30:32 +01:00
i386_ksyms_32.c x86: unexport __{read,write}_lock_failed 2008-01-30 13:30:29 +01:00
i387.c x86: x86 user_regset cleanup 2008-01-30 13:31:55 +01:00
i8237.c Driver core: change sysdev classes to use dynamic kobject names 2008-01-24 20:40:40 -08:00
i8253.c mips, x86: optimize the i8259 code a bit 2008-01-30 13:30:47 +01:00
i8259_32.c x86: rename the struct pt_regs members for 32/64-bit consistency 2008-01-30 13:30:56 +01:00
i8259_64.c x86: move to .rodata/.init.data 2008-01-30 13:31:23 +01:00
init_task.c x86: nuke a ton of unused exports 2008-01-30 13:30:28 +01:00
io_apic_32.c x86: adjust enable_NMI_through_LVT0() 2008-01-30 13:31:24 +01:00
io_apic_64.c x86: adjust enable_NMI_through_LVT0() 2008-01-30 13:31:24 +01:00
io_delay.c x86: add DMI quirk for io-delay hangs on Compaq Presario V6000 laptops 2008-01-30 13:30:05 +01:00
ioport_32.c x86: rename the struct pt_regs members for 32/64-bit consistency 2008-01-30 13:30:56 +01:00
ioport_64.c x86: rename the struct pt_regs members for 32/64-bit consistency 2008-01-30 13:30:56 +01:00
irq_32.c x86: remove all definitions with fastcall 2008-01-30 13:31:17 +01:00
irq_64.c x86: rename the struct pt_regs members for 32/64-bit consistency 2008-01-30 13:30:56 +01:00
k8.c
kprobes.c x86: kprobes leftover cleanups 2008-01-30 13:31:43 +01:00
ldt.c x86: change write_ldt_entry signature 2008-01-30 13:31:13 +01:00
machine_kexec_32.c x86: unify struct desc_ptr 2008-01-30 13:31:12 +01:00
machine_kexec_64.c x86: 64-bit, make sparsemem vmemmap the only memory model 2008-01-30 13:30:47 +01:00
Makefile x86: delete vsyscall files during make clean 2007-10-17 21:56:01 +02:00
Makefile_32 x86: i387 renaming 2008-01-30 13:31:50 +01:00
Makefile_64 x86: x86 i387 user_regset 2008-01-30 13:31:50 +01:00
mca_32.c
mfgpt_32.c x86: GEODE fix a race condition in the MFGPT timer tick 2008-01-22 23:30:16 +01:00
microcode.c cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus() 2008-01-25 21:08:02 +01:00
module_32.c
module_64.c
mpparse_32.c arch/x86/: spelling fixes 2008-01-30 13:31:42 +01:00
mpparse_64.c x86: acpi use cpu_physical_id 2007-10-19 20:35:03 +02:00
msr.c PM: Acquire device locks on suspend 2008-01-24 20:40:04 -08:00
nmi_32.c x86: clean up nmi_32/64.c 2008-01-30 13:30:33 +01:00
nmi_64.c x86: clean up nmi_32/64.c 2008-01-30 13:30:33 +01:00
numaq_32.c
paravirt_32.c x86: change write_ldt_entry signature 2008-01-30 13:31:13 +01:00
pci-calgary_64.c x86: remove duplicate includes 2008-01-30 13:30:32 +01:00
pci-dma_32.c i386: Clean up duplicate includes in arch/i386/kernel/ 2007-10-17 20:15:51 +02:00
pci-dma_64.c x86: pci-dma_64.c: cleanups 2008-01-30 13:30:31 +01:00
pci-gart_64.c x86: code cleanups in arch/x86/kernel/pci-gart_64.c 2008-01-30 13:30:12 +01:00
pci-nommu_64.c x86 gart: rename iommu.h to gart.h 2007-10-30 00:22:22 +01:00
pci-swiotlb_64.c x86: nuke a ton of unused exports 2008-01-30 13:30:28 +01:00
pcspeaker.c
pmtimer_64.c x86: move pmtmr related declarations 2008-01-30 13:30:18 +01:00
process_32.c x86: x86 user_regset cleanup 2008-01-30 13:31:55 +01:00
process_64.c x86: x86 user_regset cleanup 2008-01-30 13:31:55 +01:00
ptrace.c x86: x86 ptrace generic requests 2008-01-30 13:31:56 +01:00
quirks.c x86: Add HPET force support for MCP55 (nForce 5) chipsets 2007-10-23 22:37:25 +02:00
reboot_32.c x86: unify struct desc_ptr 2008-01-30 13:31:12 +01:00
reboot_64.c x86: EFI runtime service support: EFI runtime services 2008-01-30 13:31:19 +01:00
reboot_fixups_32.c x86: reboot fixup for wrap2c board 2007-11-17 16:27:02 +01:00
relocate_kernel_32.S
relocate_kernel_64.S
rtc.c x86: share rtc code 2008-01-30 13:30:27 +01:00
scx200_32.c
setup64.c x86: unify tss_struct 2008-01-30 13:31:31 +01:00
setup_32.c x86 boot: use E820 memory map on EFI 32 platform 2008-01-30 13:31:19 +01:00
setup_64.c x86: move definitions to processor.h 2008-01-30 13:31:39 +01:00
sigframe_32.h
signal_32.c x86: remove all definitions with fastcall 2008-01-30 13:31:17 +01:00
signal_64.c x86: get rid of _MASK flags 2008-01-30 13:31:27 +01:00
smp_32.c x86: voluntary leave_mm before entering ACPI C3 2008-01-30 13:32:01 +01:00
smp_64.c x86: voluntary leave_mm before entering ACPI C3 2008-01-30 13:32:01 +01:00
smpboot_32.c x86: adjust enable_NMI_through_LVT0() 2008-01-30 13:31:24 +01:00
smpboot_64.c x86: provide 64-bit with a load_sp0 function. 2008-01-30 13:31:31 +01:00
smpcommon_32.c x86: change write_gdt_entry signature. 2008-01-30 13:31:13 +01:00
srat_32.c
stacktrace.c x86: nuke a ton of unused exports 2008-01-30 13:30:28 +01:00
step.c x86, ptrace: support for branch trace store(BTS) 2008-01-30 13:31:09 +01:00
summit_32.c spelling fixes: arch/i386/ 2007-10-20 01:13:56 +02:00
suspend_64.c x86: make __{save,restore}_processor_state static 2008-01-30 13:31:23 +01:00
suspend_asm_64.S x86: rename the struct pt_regs members for 32/64-bit consistency 2008-01-30 13:30:56 +01:00
sys_i386_32.c remove include/asm-*/ipc.h 2007-10-17 08:42:55 -07:00
sys_x86_64.c x86: PIE executable randomization, checkpatch fixes 2008-01-30 13:31:07 +01:00
syscall_64.c
syscall_table_32.S
tce_64.c x86: Create clflush() inline, remove hardcoded wbinvd 2007-10-17 20:16:12 +02:00
time_32.c x86: rename the struct pt_regs members for 32/64-bit consistency 2008-01-30 13:30:56 +01:00
time_64.c x86: prepare time related functions for paravirt 2008-01-30 13:31:10 +01:00
tls.c x86: x86 user_regset TLS 2008-01-30 13:31:52 +01:00
tls.h x86: x86 user_regset TLS 2008-01-30 13:31:52 +01:00
topology.c x86: arch_register_cpu() section fix 2007-12-04 17:19:07 +01:00
trampoline_32.S x86: misc. constifications 2007-10-17 20:16:08 +02:00
trampoline_64.S x86: misc. constifications 2007-10-17 20:16:08 +02:00
traps_32.c x86: remove all definitions with fastcall 2008-01-30 13:31:17 +01:00
traps_64.c x86: get rid of _MASK flags 2008-01-30 13:31:27 +01:00
tsc_32.c x86: scale cyc_2_nsec according to CPU frequency 2008-01-30 13:30:06 +01:00
tsc_64.c x86: split get_cycles_sync 2008-01-30 13:31:03 +01:00
tsc_sync.c x86: fix: s2ram + P4 + tsc = annoyance 2008-01-30 13:30:04 +01:00
verify_cpu_64.S
vm86_32.c arch/x86/: spelling fixes 2008-01-30 13:31:42 +01:00
vmi_32.c x86: change write_ldt_entry signature 2008-01-30 13:31:13 +01:00
vmiclock_32.c x86: move 8259 defines to i8259.h 2008-01-30 13:30:29 +01:00
vmlinux_32.lds.S x86: vmlinux_32.lds.S: remove repeated comment from the x86-32 linker script 2008-01-30 13:30:46 +01:00
vmlinux_64.lds.S all archs: consolidate init and exit sections in vmlinux.lds.h 2008-01-28 23:21:17 +01:00
vmlinux.lds.S
vsmp_64.c x86: clean up arch/x86/kernel/vsmp_64.c 2008-01-30 13:30:24 +01:00
vsyscall_64.c x86: change gdt acessor macro name 2008-01-30 13:31:12 +01:00
x8664_ksyms_64.c x86: export cpu_gdt_descr 2008-01-30 13:31:10 +01:00