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5b43d20a4d12d94f258bbbca5fa4df8ff8a17848
linux/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
[PATCH] powerpc: Implement support for setting little-endian mode via prctl
2006-06-09 21:24:15 +10:00
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
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
entry_64.S
[POWERPC] Lazy interrupt disabling for 64-bit machines
2006-10-16 16:31:36 +10:00
firmware.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
fpu.S
[POWERPC] Restore copyright notice in arch/powerpc/kernel/fpu.S
2006-08-30 14:45:35 +10:00
head_4xx.S
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
head_8xx.S
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
head_32.S
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
head_44x.S
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
head_64.S
[POWERPC] Lazy interrupt disabling for 64-bit machines
2006-10-16 16:31:36 +10:00
head_booke.h
[PATCH] powerpc: Fix Kernel FP unavail exception for BookE
2006-02-10 16:51:50 +11:00
head_fsl_booke.S
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
ibmebus.c
IRQ: Use the new typedef for interrupt handler function pointers
2006-10-09 12:19:47 +01:00
idle_6xx.S
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
idle_power4.S
[POWERPC] Lazy interrupt disabling for 64-bit machines
2006-10-16 16:31:36 +10:00
idle.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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
[PATCH] powerpc: remove io_page_mask
2006-04-22 18:45:05 +10:00
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
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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
[PATCH] powerpc: Fix iSeries bug in VMALLOCBASE/VMALLOC_START consolidation
2006-01-09 15:06:06 +11:00
machine_kexec_32.c
Storage class should be first
2006-06-26 18:57:34 +02:00
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
powerpc: Move module.c over to arch/powerpc
2006-03-27 19:28:58 +11:00
module_64.c
[PATCH] powerpc64: Fix loading of modules without a .toc section
2006-04-28 21:04:49 +10:00
nvram_64.c
[PATCH] nvram_print_partitions cosmetic fixup
2006-04-29 18:08:05 +10:00
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
[POWERPC] cleanup dma_mapping_ops
2006-06-15 19:31:26 +10:00
pci_dn.c
[POWERPC] Constify & voidify get_property()
2006-07-31 15:55:04 +10:00
pci_iommu.c
[POWERPC] cleanup dma_mapping_ops
2006-06-15 19:31:26 +10:00
perfmon_fsl_booke.c
fix file specification in comments
2006-10-03 23:01:26 +02:00
pmc.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
ppc32.h
powerpc: move include/asm-ppc64/ppc32.h to arch/powerpc/kernel
2005-11-03 16:03:28 +11:00
ppc_ksyms.c
[POWERPC] Lazy interrupt disabling for 64-bit machines
2006-10-16 16:31:36 +10:00
proc_ppc64.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
ptrace-common.h
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
ptrace.c
[POWERPC] Fix PPC32 SECCOMP, unexport do_syscall_trace_{enter,leave}
2006-09-26 15:24:34 +10:00
rtas_flash.c
[PATCH] powerpc: reorg RTAS delay code
2006-06-09 21:21:06 +10:00
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
[PATCH] powerpc: reorg RTAS delay code
2006-06-09 21:21:06 +10:00
rtas.c
[POWERPC] reboot when panic_timout is set
2006-08-25 13:30:26 +10:00
semaphore.c
powerpc: Merge enough to start building in arch/powerpc.
2005-09-26 16:04:21 +10:00
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
[PATCH] powerpc: Make early xmon logic immune to location of early parsing
2006-05-19 15:02:12 +10:00
signal_32.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
signal_64.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
tau_6xx.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
vdso.c
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
vecemu.c
[PATCH] powerpc: Move arch/ppc*/kernel/vecemu.c to arch/powerpc
2005-09-21 19:21:07 +10:00
vector.S
Remove obsolete #include <linux/config.h>
2006-06-30 19:25:36 +02:00
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