mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-09-21 11:53:01 +00:00
2568673dd6
rq->curr/prev_runnable_sum counters represent cpu demand from various tasks that have run on a cpu. Any task that runs on a cpu will have a representation in rq->curr_runnable_sum. Their partial_demand value will be included in rq->curr_runnable_sum. Since partial_demand is derived from historical load samples for a task, rq->curr_runnable_sum could represent "inflated/un-realistic" cpu usage. As an example, lets say that task with partial_demand of 10ms runs for only 1ms on a cpu. What is included in rq->curr_runnable_sum is 10ms (and not the actual execution time of 1ms). This leads to cpu busy time being reported on the upside causing frequency to stay higher than necessary. This patch fixes cpu busy accounting scheme to strictly represent actual usage. It also provides for conditional fixup of busy time upon migration and upon heavy-task wakeup. CRs-Fixed: 691443 Change-Id: Ic4092627668053934049af4dfef65d9b6b901e6b Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
341 lines
10 KiB
Plaintext
341 lines
10 KiB
Plaintext
menu "CPU Frequency scaling"
|
|
|
|
config CPU_FREQ
|
|
bool "CPU Frequency scaling"
|
|
help
|
|
CPU Frequency scaling allows you to change the clock speed of
|
|
CPUs on the fly. This is a nice method to save power, because
|
|
the lower the CPU clock speed, the less power the CPU consumes.
|
|
|
|
Note that this driver doesn't automatically change the CPU
|
|
clock speed, you need to either enable a dynamic cpufreq governor
|
|
(see below) after boot, or use a userspace tool.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq>.
|
|
|
|
If in doubt, say N.
|
|
|
|
if CPU_FREQ
|
|
|
|
config CPU_FREQ_GOV_COMMON
|
|
bool
|
|
|
|
config SCHED_FREQ_INPUT
|
|
bool "Scheduler inputs to cpufreq governor"
|
|
depends on SCHED_HMP
|
|
help
|
|
This option enables support for scheduler based CPU utilization
|
|
calculations which may then be used by any cpufreq governor. The
|
|
scheduler keeps track of "recent" cpu demand of tasks, which can
|
|
help determine need for changing frequency well in advance of what
|
|
a governor would have been able to detect on its own.
|
|
|
|
config CPU_FREQ_STAT
|
|
tristate "CPU frequency translation statistics"
|
|
default y
|
|
help
|
|
This driver exports CPU frequency statistics information through sysfs
|
|
file system.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_stats.
|
|
|
|
If in doubt, say N.
|
|
|
|
config CPU_FREQ_STAT_DETAILS
|
|
bool "CPU frequency translation statistics details"
|
|
depends on CPU_FREQ_STAT
|
|
help
|
|
This will show detail CPU frequency translation table in sysfs file
|
|
system.
|
|
|
|
If in doubt, say N.
|
|
|
|
choice
|
|
prompt "Default CPUFreq governor"
|
|
default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ
|
|
default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
|
|
help
|
|
This option sets which CPUFreq governor shall be loaded at
|
|
startup. If in doubt, select 'performance'.
|
|
|
|
config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
|
|
bool "performance"
|
|
select CPU_FREQ_GOV_PERFORMANCE
|
|
help
|
|
Use the CPUFreq governor 'performance' as default. This sets
|
|
the frequency statically to the highest frequency supported by
|
|
the CPU.
|
|
|
|
config CPU_FREQ_DEFAULT_GOV_POWERSAVE
|
|
bool "powersave"
|
|
depends on EXPERT
|
|
select CPU_FREQ_GOV_POWERSAVE
|
|
help
|
|
Use the CPUFreq governor 'powersave' as default. This sets
|
|
the frequency statically to the lowest frequency supported by
|
|
the CPU.
|
|
|
|
config CPU_FREQ_DEFAULT_GOV_USERSPACE
|
|
bool "userspace"
|
|
select CPU_FREQ_GOV_USERSPACE
|
|
help
|
|
Use the CPUFreq governor 'userspace' as default. This allows
|
|
you to set the CPU frequency manually or when a userspace
|
|
program shall be able to set the CPU dynamically without having
|
|
to enable the userspace governor manually.
|
|
|
|
config CPU_FREQ_DEFAULT_GOV_ONDEMAND
|
|
bool "ondemand"
|
|
select CPU_FREQ_GOV_ONDEMAND
|
|
select CPU_FREQ_GOV_PERFORMANCE
|
|
help
|
|
Use the CPUFreq governor 'ondemand' as default. This allows
|
|
you to get a full dynamic frequency capable system by simply
|
|
loading your cpufreq low-level hardware driver.
|
|
Be aware that not all cpufreq drivers support the ondemand
|
|
governor. If unsure have a look at the help section of the
|
|
driver. Fallback governor will be the performance governor.
|
|
|
|
config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
|
|
bool "conservative"
|
|
select CPU_FREQ_GOV_CONSERVATIVE
|
|
select CPU_FREQ_GOV_PERFORMANCE
|
|
help
|
|
Use the CPUFreq governor 'conservative' as default. This allows
|
|
you to get a full dynamic frequency capable system by simply
|
|
loading your cpufreq low-level hardware driver.
|
|
Be aware that not all cpufreq drivers support the conservative
|
|
governor. If unsure have a look at the help section of the
|
|
driver. Fallback governor will be the performance governor.
|
|
|
|
config CPU_FREQ_DEFAULT_GOV_INTERACTIVE
|
|
bool "interactive"
|
|
select CPU_FREQ_GOV_INTERACTIVE
|
|
help
|
|
Use the CPUFreq governor 'interactive' as default. This allows
|
|
you to get a full dynamic cpu frequency capable system by simply
|
|
loading your cpufreq low-level hardware driver, using the
|
|
'interactive' governor for latency-sensitive workloads.
|
|
|
|
endchoice
|
|
|
|
config CPU_FREQ_GOV_PERFORMANCE
|
|
tristate "'performance' governor"
|
|
help
|
|
This cpufreq governor sets the frequency statically to the
|
|
highest available CPU frequency.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_performance.
|
|
|
|
If in doubt, say Y.
|
|
|
|
config CPU_FREQ_GOV_POWERSAVE
|
|
tristate "'powersave' governor"
|
|
help
|
|
This cpufreq governor sets the frequency statically to the
|
|
lowest available CPU frequency.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_powersave.
|
|
|
|
If in doubt, say Y.
|
|
|
|
config CPU_FREQ_GOV_USERSPACE
|
|
tristate "'userspace' governor for userspace frequency scaling"
|
|
help
|
|
Enable this cpufreq governor when you either want to set the
|
|
CPU frequency manually or when a userspace program shall
|
|
be able to set the CPU dynamically, like on LART
|
|
<http://www.lartmaker.nl/>.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_userspace.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq/>.
|
|
|
|
If in doubt, say Y.
|
|
|
|
config CPU_FREQ_GOV_ONDEMAND
|
|
tristate "'ondemand' cpufreq policy governor"
|
|
select CPU_FREQ_GOV_COMMON
|
|
help
|
|
'ondemand' - This driver adds a dynamic cpufreq policy governor.
|
|
The governor does a periodic polling and
|
|
changes frequency based on the CPU utilization.
|
|
The support for this governor depends on CPU capability to
|
|
do fast frequency switching (i.e, very low latency frequency
|
|
transitions).
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_ondemand.
|
|
|
|
For details, take a look at linux/Documentation/cpu-freq.
|
|
|
|
If in doubt, say N.
|
|
|
|
config CPU_FREQ_GOV_INTERACTIVE
|
|
tristate "'interactive' cpufreq policy governor"
|
|
help
|
|
'interactive' - This driver adds a dynamic cpufreq policy governor
|
|
designed for latency-sensitive workloads.
|
|
|
|
This governor attempts to reduce the latency of clock
|
|
increases so that the system is more responsive to
|
|
interactive workloads.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_interactive.
|
|
|
|
For details, take a look at linux/Documentation/cpu-freq.
|
|
|
|
If in doubt, say N.
|
|
|
|
config CPU_FREQ_GOV_CONSERVATIVE
|
|
tristate "'conservative' cpufreq governor"
|
|
depends on CPU_FREQ
|
|
select CPU_FREQ_GOV_COMMON
|
|
help
|
|
'conservative' - this driver is rather similar to the 'ondemand'
|
|
governor both in its source code and its purpose, the difference is
|
|
its optimisation for better suitability in a battery powered
|
|
environment. The frequency is gracefully increased and decreased
|
|
rather than jumping to 100% when speed is required.
|
|
|
|
If you have a desktop machine then you should really be considering
|
|
the 'ondemand' governor instead, however if you are using a laptop,
|
|
PDA or even an AMD64 based computer (due to the unacceptable
|
|
step-by-step latency issues between the minimum and maximum frequency
|
|
transitions in the CPU) you will probably want to use this governor.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_conservative.
|
|
|
|
For details, take a look at linux/Documentation/cpu-freq.
|
|
|
|
If in doubt, say N.
|
|
|
|
config CPU_BOOST
|
|
tristate "Event base short term CPU freq boost"
|
|
depends on CPU_FREQ
|
|
help
|
|
This driver boosts the frequency of one or more CPUs based on
|
|
various events that might occur in the system. As of now, the
|
|
events it reacts to are:
|
|
- Migration of important threads from one CPU to another.
|
|
|
|
If in doubt, say N.
|
|
|
|
config GENERIC_CPUFREQ_CPU0
|
|
tristate "Generic CPU0 cpufreq driver"
|
|
depends on HAVE_CLK && REGULATOR && PM_OPP && OF
|
|
help
|
|
This adds a generic cpufreq driver for CPU0 frequency management.
|
|
It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
|
|
systems which share clock and voltage across all CPUs.
|
|
|
|
If in doubt, say N.
|
|
|
|
menu "x86 CPU frequency scaling drivers"
|
|
depends on X86
|
|
source "drivers/cpufreq/Kconfig.x86"
|
|
endmenu
|
|
|
|
menu "ARM CPU frequency scaling drivers"
|
|
depends on ARM || ARM64
|
|
source "drivers/cpufreq/Kconfig.arm"
|
|
endmenu
|
|
|
|
menu "AVR32 CPU frequency scaling drivers"
|
|
depends on AVR32
|
|
|
|
config AVR32_AT32AP_CPUFREQ
|
|
bool "CPU frequency driver for AT32AP"
|
|
depends on PLATFORM_AT32AP
|
|
default n
|
|
help
|
|
This enables the CPU frequency driver for AT32AP processors.
|
|
If in doubt, say N.
|
|
|
|
endmenu
|
|
|
|
menu "CPUFreq processor drivers"
|
|
depends on IA64
|
|
|
|
config IA64_ACPI_CPUFREQ
|
|
tristate "ACPI Processor P-States driver"
|
|
depends on ACPI_PROCESSOR
|
|
help
|
|
This driver adds a CPUFreq driver which utilizes the ACPI
|
|
Processor Performance States.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq/>.
|
|
|
|
If in doubt, say N.
|
|
|
|
endmenu
|
|
|
|
menu "MIPS CPUFreq processor drivers"
|
|
depends on MIPS
|
|
|
|
config LOONGSON2_CPUFREQ
|
|
tristate "Loongson2 CPUFreq Driver"
|
|
help
|
|
This option adds a CPUFreq driver for loongson processors which
|
|
support software configurable cpu frequency.
|
|
|
|
Loongson2F and it's successors support this feature.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq/>.
|
|
|
|
If in doubt, say N.
|
|
|
|
endmenu
|
|
|
|
menu "PowerPC CPU frequency scaling drivers"
|
|
depends on PPC32 || PPC64
|
|
source "drivers/cpufreq/Kconfig.powerpc"
|
|
endmenu
|
|
|
|
menu "SPARC CPU frequency scaling drivers"
|
|
depends on SPARC64
|
|
config SPARC_US3_CPUFREQ
|
|
tristate "UltraSPARC-III CPU Frequency driver"
|
|
help
|
|
This adds the CPUFreq driver for UltraSPARC-III processors.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq>.
|
|
|
|
If in doubt, say N.
|
|
|
|
config SPARC_US2E_CPUFREQ
|
|
tristate "UltraSPARC-IIe CPU Frequency driver"
|
|
help
|
|
This adds the CPUFreq driver for UltraSPARC-IIe processors.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq>.
|
|
|
|
If in doubt, say N.
|
|
endmenu
|
|
|
|
menu "SH CPU Frequency scaling"
|
|
depends on SUPERH
|
|
config SH_CPU_FREQ
|
|
tristate "SuperH CPU Frequency driver"
|
|
help
|
|
This adds the cpufreq driver for SuperH. Any CPU that supports
|
|
clock rate rounding through the clock framework can use this
|
|
driver. While it will make the kernel slightly larger, this is
|
|
harmless for CPUs that don't support rate rounding. The driver
|
|
will also generate a notice in the boot log before disabling
|
|
itself if the CPU in question is not capable of rate rounding.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq>.
|
|
|
|
If unsure, say N.
|
|
endmenu
|
|
|
|
endif
|
|
endmenu
|