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kernel-ark/arch/powerpc/kernel
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Olof Johansson 5b43d20a4d [POWERPC] powerpc: Enable DEEPNAP power savings mode on 970MP 
Without this patch, on an idle system I get:

cpu-power-0:21.638
cpu-power-1:27.102
cpu-power-2:29.343
cpu-power-3:25.784
Total: 103.8W

With this patch:

cpu-power-0:11.730
cpu-power-1:17.185
cpu-power-2:18.547
cpu-power-3:17.528
Total: 65.0W

If I lower HZ to 100, I can get it as low as:

cpu-power-0:10.938
cpu-power-1:16.021
cpu-power-2:17.245
cpu-power-3:16.145
Total: 60.2W

Another (older) Quad G5 went from 54W to 39W at HZ=250.

Coming back out of Deep Nap takes 40-70 cycles longer than coming back
from just Nap (which already takes quite a while). I don't think it'll
be a performance issue (interrupt latency on an idle system), but in
case someone does measurements feel free to report them.

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-16 16:32:25 +10:00
..
vdso32 [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
vdso64 [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
align.c
asm-offsets.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
binfmt_elf32.c
btext.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
compat_audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
cpu_setup_6xx.S
cpu_setup_ppc970.S [POWERPC] powerpc: Enable DEEPNAP power savings mode on 970MP 2006-10-16 16:32:25 +10:00
cputable.c [POWERPC] powerpc: Enable DEEPNAP power savings mode on 970MP 2006-10-16 16:32:25 +10:00
crash_dump.c [POWERPC] Make doc comments extractable 2006-08-08 17:07:04 +10:00
crash.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
dma_64.c [POWERPC] Simplify dma_ops bug conditions 2006-07-31 15:55:06 +10:00
entry_32.S
entry_64.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
firmware.c
fpu.S [POWERPC] Restore copyright notice in arch/powerpc/kernel/fpu.S 2006-08-30 14:45:35 +10:00
head_4xx.S
head_8xx.S
head_32.S
head_44x.S
head_64.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
head_booke.h
head_fsl_booke.S
ibmebus.c IRQ: Use the new typedef for interrupt handler function pointers 2006-10-09 12:19:47 +01:00
idle_6xx.S
idle_power4.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
idle.c
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
io.c [POWERPC] Merge iSeries i/o operations with the rest 2006-09-22 15:19:58 +10:00
iomap.c
iommu.c [POWERPC] Fix harmless typo 2006-10-06 21:10:40 +10:00
irq.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
kprobes.c [PATCH] kretprobe spinlock deadlock patch 2006-10-02 07:57:16 -07:00
l2cr_6xx.S
legacy_serial.c Merge branch 'merge' 2006-08-25 14:56:07 +10:00
lparcfg.c [POWERPC] clean up pseries hcall interfaces 2006-08-01 16:19:15 +10:00
lparmap.c
machine_kexec_32.c
machine_kexec_64.c Merge branch 'merge' 2006-08-25 14:56:07 +10:00
machine_kexec.c [POWERPC] Move some kexec logic into machine_kexec.c 2006-08-17 16:41:10 +10:00
Makefile [POWERPC] convert string i/o operations to C 2006-09-20 14:06:18 +10:00
misc_32.S [PATCH] rename the provided execve functions to kernel_execve 2006-10-02 07:57:23 -07:00
misc_64.S IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
misc.S [POWERPC] convert string i/o operations to C 2006-09-20 14:06:18 +10:00
module_32.c
module_64.c
nvram_64.c
of_device.c [POWERPC] Remove linux,device properties 2006-07-07 20:19:16 +10:00
paca.c [POWERPC] Implement SLB shadow buffer 2006-08-08 17:08:56 +10:00
pci_32.c [POWERPC] Fix IO Window Updates on P2P bridges. 2006-10-16 15:53:30 +10:00
pci_64.c [POWERPC] Check for offline nodes in pci NUMA code 2006-10-16 15:53:30 +10:00
pci_direct_iommu.c
pci_dn.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
pci_iommu.c
perfmon_fsl_booke.c fix file specification in comments 2006-10-03 23:01:26 +02:00
pmc.c
ppc32.h
ppc_ksyms.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
proc_ppc64.c
process.c [POWERPC] Better check in show_instructions 2006-10-16 15:53:30 +10:00
prom_init.c Merge branch 'merge' 2006-08-31 15:45:48 +10:00
prom_parse.c Revert "[POWERPC] Don't get PCI IRQ from OF for devices with no IRQ" 2006-10-08 15:38:22 -07:00
prom.c [POWERPC] Minor fix for bootargs property 2006-10-06 21:10:41 +10:00
ptrace32.c
ptrace-common.h
ptrace.c [POWERPC] Fix PPC32 SECCOMP, unexport do_syscall_trace_{enter,leave} 2006-09-26 15:24:34 +10:00
rtas_flash.c
rtas_pci.c [POWERPC] Add a helper for calculating RTAS "config_addr" parameters 2006-08-25 13:27:35 +10:00
rtas-proc.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
rtas-rtc.c
rtas.c [POWERPC] reboot when panic_timout is set 2006-08-25 13:30:26 +10:00
semaphore.c
setup_32.c [POWERPC] Fix xmon=off and cleanup xmon initialisation 2006-10-04 14:52:22 +10:00
setup_64.c [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
setup-common.c [POWERPC] Fix xmon=off and cleanup xmon initialisation 2006-10-04 14:52:22 +10:00
setup.h
signal_32.c
signal_64.c
smp-tbsync.c [POWERPC] Fix irq enable/disable in smp_generic_take_timebase 2006-08-30 16:10:47 +10:00
smp.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
swsusp_32.S [PATCH] Change the name of pagedir_nosave 2006-09-26 08:49:01 -07:00
sys_ppc32.c [PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers 2006-10-03 08:03:40 -07:00
syscalls.c [PATCH] namespaces: utsname: switch to using uts namespaces 2006-10-02 07:57:21 -07:00
sysfs.c [POWERPC] Always call cede in pseries dedicated idle loop 2006-09-26 15:24:34 +10:00
systbl.S
tau_6xx.c
time.c [POWERPC] Fix up after irq changes 2006-10-07 22:08:26 +10:00
traps.c [POWERPC] Never panic when taking altivec exceptions from userspace 2006-10-16 15:53:30 +10:00
udbg_16550.c [POWERPC] Fix default clock for udbg_16550 2006-07-26 01:27:13 +10:00
udbg.c
vdso.c
vecemu.c
vector.S
vio.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
vmlinux.lds.S [POWERPC] implement BEGIN/END_FW_FTR_SECTION 2006-10-03 16:50:21 +10:00