[Android Q&A, Help & Troubleshooting] ShivaY:
CPU Governors, Hotplug drivers and GPU governors Complete Explanation & Guide Part 2

CPU Governors, Hotplug drivers and GPU governors Explained (Updated 30/12/16)

---------------------------------------------------------------------------------------------------------

Official XDA thread Of The Contributer: http://xdaforums.com/member.php?u=5811506

Edited By ShivaY: http://xdaforums.com/member.php?u=6704044

Guide Part 1 Link : http://xdaforums.com/lenovo-a6000/how-to/cpu-governors-hotplug-drivers-gpu-t3528762

Guide Part 3 Link :http://xdaforums.com/lenovo-a6000/how-to/cpu-governors-hotplug-drivers-gpu-t3528771

Guide Part 4 Link : http://xdaforums.com/lenovo-a6000/how-to/cpu-governors-hotplug-drivers-gpu-t3528772

29: IntelliActive

---------------------

Based off Google's Interactive governor with the following enhancements:

1. self-boost capability from input drivers (no need for PowerHAL assist)

2. two phase scheduling (idle/busy phases to prevent from jumping directly to max freq

3. Checks for offline cpus and short circuits some unnecessary checks to improve code execution paths. Therefore, it avoids CPU hotplugging.

Created by Faux

30: Adaptive

---------------------

This driver adds a dynamic cpufreq policy governor designed for latency-sensitive workloads and also for demanding performance.

This governor attempts to reduce the latency of clock so that the system is more responsive to interactive workloads in lowest steady-state but to reduce power consumption in middle operation level, level up will be done in step by step to prohibit system from going to

max operation level.

31: Nightmare

----------------------

A PegasusQ modified, less aggressive and more stable. A good compromise between performance and battery. In addition to the SoD is a prevention because it usually does not hotplug.

32: ZZmoove

-----------------

The ZZmoove Governor by ZaneZam is optimized for low power consumption when the screen off, with particular attention to the limitation of consumption applications in the background with the screen off, such as listening to music. The unique feature with ZZmoove is that it has predefined profiles and allows profile switching. This governor is still a WIP as the developer is constantly giving updates! Here are the available profiles:

for Default (set governor defaults)

for Yank Battery -> old untouched setting (a very good battery/performance balanced setting DEV-NOTE: highly recommended!)

for Yank Battery Extreme -> old untouched setting (like yank battery but focus on battery saving)

for ZaneZam Battery -> old untouched setting (a more 'harsh' setting strictly focused on battery saving DEV-NOTE: might give some lags!)

for ZaneZam Battery Plus -> NEW! reworked 'faster' battery setting (DEV-NOTE: recommended too! )

for ZaneZam Optimized -> old untouched setting (balanced setting with no focus in any direction DEV-NOTE: relict from back in the days, even though some people still like it!)

for ZaneZam Moderate -> NEW! setting based on 'zzopt' which has mainly (but not strictly only!) 2 cores online

for ZaneZam Performance -> old untouched setting (all you can get from zzmoove in terms of performance but still has the fast down scaling/hotplugging behaving)

for ZaneZam InZane -> NEW! based on performance with new auto fast scaling active. a new experience!

for ZaneZam Gaming -> NEW! based on performance with new scaling block enabled to avoid cpu overheating during gameplay

for ZaneZam Relax -> NEW! based on moderate (except hotplug settings) with relaxed sleep settings

(since version 0.9 beta4: cpu temperature threshold of 65�C enabled if exynos4 cpu temperature reading support was compiled with the governor)

33: Sleepy

-------------------

The Sleepy (formerly known as Solo) is an attempt to strike a balance between performance and battery power to create. It is based on Ondemand. It includes some tweaks like the Down_sampling variable and other features that set by the user through the sysfs of "echo" call. Sleepy is quite similar to Ondemandx.

34: Hyper

---------------

The Hyper (formerly known as kenobi) is an aggressive smart and smooth governor based on the Ondemand and is equipped with several features of Ondemandx suspend profiles. It also has the fast_start deep_sleep variable and detection features. In addition, the maximum frequency is in suspend mode 500Mhz or whatever the kernel devel. This is a more smoothness oriented governor which means that it is good for performance, without sacrificing much battery life.

35: SmartassH3

-------------------------

Based on SmartassV2 with parameters tuned by H3ROS. It has been tuned to have more efficient frequency scaling (not ramping too high when not needed) which this could potentially result in better battery life.

36: SLP

--------------

It is a mix of pegasusq and ondemand. Therefore, it has a balance between battery savings and performance.

37: NeoX

---------------

An optimized version of the pegasusq governor but with some extra tweaks for better performance. This means slightly more battery drainage than the original PegasusQ but it is still a balanced governor.

38. ZZmanx

----------------

ZZmanx is exactly the same as ZZmove, but it has been renamed because DorimanX made it into his own version (possibly better performance) . However, it still suffers from below average gaming performance. (Refer to ZZmoove description for guide on profiles)

39. OnDemandPlus

------------------------------

Ondemandplus is an ondemand and interactive-based governor that has additional power-saving capabilities while maintaining very snappy performance. While the interactive governor provides a modern and sleek framework, the scaling logic has been been re-written completely. Reports have found that users find ondemandplus as a more battery friendly governor. In ondemandplus, the downscaling behavior from ondemand is only very slightly modified. However, the upscaling has been modified to not scale up to maximum frequency immediately.

40. Dynamic Interactive (DynInteractive)

-----------------------------------------------------

This governor dynamically adjusts itself according to load. That means it's settings are dynamic (always changing) and not static (not changing). Dyninteractive still obtains the same great balance between battery life and performance found in the original interactive governor and improves it even further. This is not the same as the original interactive governor because of this unique behavior.

41. Smartmax

---------------------

Smartmax is a mix between ondemand and smartassv2. It behaves mostly like smartass with the concept of an "ideal" frequency. By default this is configured for battery saving, so this is NOT a gaming or benchmark governor! Additionally, to make it "snappy", smartmax has "touch poke". So input events from the touchscreen will boost the cpu for a specific time to a specific frequency. Developed by XDA user Maxwen.

42. Ktoonservative\KtoonservativeQ

---------------------------------------------------

A combination of ondemand and conservative. Ktoonservative contains a hotplugging variable which determines when the second core comes online. The governor shuts the core off when it returns to the second lowest frequency thus giving us a handle on the second performance factor in our CPUs behavior.

43. Performance may cry (PMC)

-----------------------------------------

A governor based on Smartmax except it's heavily tweaked for better and maximum battery life. This is not a gaming governor!

44. Dance Dance

-----------------------

Based on conservative with some smartass features, it scales accordingly to conservatives laws. So it will start from the bottom, take a load sample, if it's above the upthreshold, ramp up only one speed at a time, and ramp down one at a time. It will automatically cap the off screen speeds to 245Mhz, and if your min freq is higher than 245mhz, it will reset the min to 120mhz while screen is off and restore it upon screen awakening, and still scale accordingly to conservatives laws. So it spends most of its time at lower frequencies. The goal of this is to get the best battery life with decent performance. It is a performance focused governor but also blends with some battery savings.

45. AbyssPlugv2

------------------------

AbyssPlugv2 is a rewrite of the original CPU governor. It also fixes the problem where the governor is set only for the first core, but now governs all cores right from whatever utility you use. There have been comments on the lack of stability with this governor.

46. IntelliMM

---------------------

A rewrite of the old Min Max governor and has 3 cpu states: Idle, UI and Max. Intelliminmax (intellimm) governor is designed to work with the newer SOCs with fixed voltage rails (ie MSM8974+ SOCs). It is designed to work within those fixed voltage ranges in order to maximize battery performance while creating a smooth UI operations. It is battery friendly and spends most of the time at lower frequencies.

47. Interactive Pro

------------------------

A newer (modified) version of interactive which is optimized for devices such as the One Plus One. It is a more efficient than the original Interactive because it continuously re-evaluates the load of each CPU therefore allowing the CPU to scale efficiently.

48. Slim

--------------

A new governor from the cm branch and the slimrom project. This is a performance optimized governor and has been tuned a lot for newer devices such as the One Plus One.

49. Ondemand EPS

--------------------------

A modified version of Ondemand and is optimized for newer devices. It is based on the Semaphore Kernel's Ondemand which is more optimized for battery life. The EPS at the end stands for Extreme power savings so this governor is biased to power savings!

50. Smartmax EPS

--------------------------

This governor is based on Smartmax but is optimized for 'Extreme Power Saving' (hence the EPS suffix). This means it uses less battery than the original Smartmax so it is not a very good gaming governor (again!) This is only found on newer devices.

51. Uberdemand

------------------------

Uberdemand is Ondemand with 2-phase feature meaning it has a soft cap at 1728 MHz so your cpu won't always go directly to max, made by Chet Kener.

52. Yankactive

---------------------

A slightly modified interactive based governor by Yank555.lu. It has battery tweaks added onto it so expect better battery life! Based on user reports, this governor behaves more battery friendly than the original interactive governor without sacrificing performance.

53. Impulse

----------------

An improved version of interactive modified by neobuddy89. Impulse aims to have a balance between battery and performance just like interactive but has some tweaks to save battery.

54. Bacon

-------------

This is nothing but polished interactive governor branded as "bacon" since it was adapted from bacon device thanks to neobuddy89. Most of the tweaks are for performance/latency improvements

55. Optimax governor

------------------------------

This is based on ONDEMAND, like almost all governors that have arisen from XDA. It contains some enhancements from LG, particularly to freq boost handling so it will boost to a set level, almost like HTC's governor. It has different tunables to the HTC governor but it behaves pretty similar, the tunables it comes with default are a bit more conservative.

It originates from Cl3kener's Uber kernel for Nexus 5, where it has quite a reputation for battery life

56. Preservative governor

-----------------------------------

This is based on the idea that the CPU will consume a lot of power when it changes frequency. It is based on the conservative governor. The idea is that it will stay at the step specified (702MHz selected by the creator Bedalus) unless needed. You will notice it will hover around 702 a lot, and not go above too much, and only to min freq when NOTHING is happening at all. This is most beneficial when you are doing something like reading; the screen is static or playing light games that won't need boosting any more

The governor comes from Moob kernel for nexus 4

57. Touchdemand

------------------------

Touchdemand is based on the ondemand cpu governor but has been modified for the Tegra 3 chip (tablet only) and has additional tweaks for touchscreen responsiveness.

58. ElementalX

---------------------

ElementalX is basically a multiphase Ondemand governor that aims to achieve the best balance between battery life and performance. By default, it is more conservative than Ondemand as it does not ramp up often for most phone activities. If there is a graphics load detected, the governor will switch to a two-phase Ondemand behaviour where different max frequencies are used depending on the load increase. ElementalX comes with input boost enabled by default lowering the sampling rate and increasing the frequency to improve responsiveness.

59. Bioshock

-----------------

Not the game, but rather the CPU governor developed by Jamison904. A mix of ConservativeX and Lionheart. Good balance between battery savings and performance.

60. Blu_active

--------------------

A new cpu governor developed by eng.stk (featured in his Code_Blue kernels) based on interactive with upstream caf patches and ondemand governor bits too. This governor is mainly focused on performance like the other things the developer creates but it is also well balanced for gaming and general usage.

61. Umbrella_core

------------------------

A new cpu governor by twisedumbrella based on interactive that is focused on battery life and not performance. It will still ramp up to a set frequency but will not stay at high frequencies for long. This governor tends to stay in high-mid range frequencies during screen_off.

62. ConservativeX

----------------------------

Also developed by Imoseyon (feat. briefly in the Lean Kernel for Galaxy Nexus), the ConservativeX governor behaves like the Conservative governor with the added benefit of locking the CPU frequency to the lowest interval when the screen is off. This governor may additionally perform hotplugging on CPU1, but there is no documentation to confirm that suspicion at this time.

63. HydrxQ

-----------------

Simply a lulzactiveq governor with tweaks to performance (thanks to tegrak). This means more performance and less battery life.

64. DevilQ

----------------

An aggressive pegasusq governor which keeps the hotplugging at max 2 cpu cores to offline). This is pretty much a more optimized pegasusq for phone's with quad core processors.

65. YankasusQ

--------------------

Yankasusq is another modified pegasusq but with including screen off freq tunable and some other modifications as well. The difference between PegasusQ and YanksusQ is that it doesn't ramp too aggressively when screen turns on (less battery drainage).

66. Darkness

------------------

It's based on nightmare but more simple and fast, basic configs but very complex structure. It is an updated version of the nightmare gov, so far it is quite stable in tests

67. Alucard

-----------------

A favourite choice and one of the original governors that Alucard_24 made. Alucard is based on ondemand but has been heavily tweaked to bring better battery life and performance. It has been known to be battery friendly without sacrificing much performance.

68. Hellsactive

-------------------------

A heavily modified intelliactive governor by hellsgod that has been tweaked to improve battery life. Hellsactive is less aggressive compared to intelliactive so the battery life will be more like the original interactive.

69. Ragingmolasses

--------------------------

Besides a gov with an awesome name its a mash up of conservative and ondemand and scales based on load with few tunables. Its meant to be simple, fast, and efficient at keeping the frequency away from the max clock unless it is absolutely needed. it includes gboost for better gaming.

70. Virtuous

---------------

It sets your max cpu for wake and sleep and changes the governor when your device is awake or asleep. It saves battery by lowering cpu frequencies while the device sleeps, when it awakes it automatically speeds it up again. Or alternately you can set the cpu. It is based on smartassV2(It uses 2 governors, one for sleep and other for awake)

71. Sakuractive

-----------------------

An aggressive hybrid of ondemand and hotplug, which means it will scale like ondemand, except a little more aggressive. But also acts like hotplug due to it shutting off a core.

72. InteractiveX v2

-----------------------------

Also developed by Imoseyon (feat. in the Lean Kernel for Galaxy Nexus), the InteractiveX V2 governor behaves like InteractiveX, and additionally forces CPU1 into a hotplug state when the screen is off.

73. Alessa

-----------------

A less aggressive and more stable ondemand modified by TeamMex. A good compromise between performance and battery. It can be used with the complementary hotplug governor. Please note that this governor is still a WIP!

74. GallimaufryX

-------------------------

A modded ondemand that is a 2-stage ondemand governor with speed tweaks. It includes imoseyon's screen-off hotplugging code.

75. AggressiveX

---------------------

A modded conservative governor but with lots of tweaks to increase snappiness while saving power. It also includes imoseyon's screen-off hotplugging code.

76. Tripndroid

---------------------

Instead of the I/O scheduler, this is a CPU governor based on ondemand with extra tweaks for performance

77. Wrexy

---------------

Wrexy is a conservative based governor. Its similiar to the Lionheart gov. It tends to stay out of higher frequencies to favor lower frequencies but performance is not much affected.

78. Xperience

-------------------

A tweaked smartassv2 for better performance and smoothness. Created by TeamMex.

79. Stockdemand

----------------------------

A heavily modified ondemand for better performance and battery life. It is still a well balanced governor and it is designed for everyday use.

80. Zeneractive

------------------------

This new "zeneractive" governor is based on interactive. It handles frequency scaling the exact same as interactive and has the same tunables as interactive for frequency scaling. However, on zeneractive all of the new hotplugging code that's in there is "from scratch."

81. InteractiveB

---------------------

An interactive based governor with a more balance battery life/performance profile

82. Aggressive

-----------------------

Like Lionheart, it is based on conservative, but even more aggressive

83. Intellidemandv2

--------------------------

Much like its predecessor, intellidemandv2 is an intelligent ondemand with browsing detection and scales based on GPU loading. It has been optimized for specific devices and has better battery life and performance.

84. Boostactive

----------------------

Based on Interactive but with cpu frequency boosting capabilities. This is performance oriented governor.

85. Wave

----------------

Based on Conservative with some tweaks for speed and battery. This governor was created by zparallax.

86. Barry-Allen

------------------------

It's based on interactive. The governor is supposed to be more battery friendly and at the same have good performance.

87. Arteractive

---------------------

It is an interactive CPU governor port from newer source code. It has more optimizations for Snapdragon 80x processors.

88. Precognition (PrecoGOV)

---------------------------------------

PrecoGOV takes over and dynamically adapts to your usage pattern. To achieve such goal, PrecoGOV manages the frequency, idle & sleep patterns, hotplugging, temperature per core and even gpu and tries to help the scheduler as best as it can, all while taking into account battery and thermal constraints.

89. Mythx_plug

---------------------

It's based on an improved Interactive governor and has been modified to scale up slower and scale down faster. It is a battery friendly governor.

90. PegasusQPlus

-------------------------

PegasusQPlus is a heavily tweaked PegasusQ governor, which has been implemented by AndreiLux in his Perseus kernel. PegasusQPlus should have a better balance between performance and battery usage.

91. Yankdemand

---------------------

Full stock (JB) ondemand governor with changed default tunable values aimed at lower battery consumption

92. HyperX

----------------

A tweaked interactive based governor for performance.

93. Despair

-----------------

It is a tweaked conservative governor with a couple extra values exposed, it tends to be a bit more conservative with battery than the conservative governor by default. Developed by DespairFactor.

94. Electroactive

--------------------------

The Electroactive CPU governor has been created to get some of the best balances between battery life and performance that you will see on a device. This governor is the replacement over the original electrodemand governor, being much more battery friendly with much smoother transitions compared to the original. It is a hybrid class governor, using a unique way to merge the best of both interactive and ondemand. It includes some extra additions and enhancements to be more battery saving than interactive governor and some boost tunes and additions that allow better power management and performance in games as well as better power saving when in normal use. CPU boost, graphics boost, fast_start deep_sleep and detection features are built in as well as 300 MHz clock speed in suspend.

95. Electrodemand

----------------------------

Based on the ondemand cpu governor, this is the older governor that was used in the electroactive kernel which uses the same tunables found in the original ondemand governor.

96. Lionfish

-----------------

The Lionfish governor combines traits of the conservative, ondemand, and interactive governors. It is designed to maximize battery life without noticeably impacting performance. It responds quickly to heavy loads (similar to ondemand and interactive) while staying within the region of optimal CPU performance per watt. With moderate loads, it periodically votes to raise, maintain, or decrease the frequency. When there are enough votes to change the frequency, it is ramped up and down gradually. The voting mechanism reduces frequency jitter compared to ondemand and conservative. squid2's testing had found that this governor uses moderate frequencies (where efficiency is optimal) more effectively than interactive, ondemand, and conservative. This improved frequency distribution results in a moderate reduction in CPU power consumption while maintaining responsiveness comparable to the interactive governor.

97. Interextrem

--------------------

A tweaked interactive governor by thehacker911. It is found in hacker kernel s6, where it has been tuned for better performance while still maintaining good battery life.

98. Cafactive

---------------------

Found in arter97's kernels, cafactive is the qualcomm optimized version of interactive from CodeAurora. This version promises to bring greatly enhanced performance over samsung's own version of interactive (benchmarks have shown a increase in performance scores), however it may be unstable on some devices and may cause some performance issues under normal and heavy operation.

99. Lightning

-------------------

Lightning is modified darkness gov made by [MENTION=5903873]HridayHS[/MENTION]

100. ThunderX

-----------------------

ThunderX is a power saving CPU governor based on SmartAssv2 optimized for Mediatek SoCs.

101. sched-DVFS

----------------------

A governor by Linaro and ARM that promises to provide better battery life while also being easy to configure. Unlike normal CPU governors that rely on a sampling-based approach to consider cpu time, sched-DVFS uses scheduler task utilization tracking which provides smoother scaling and better response to changing CPU load. Only found on Energy Aware Scheduling (EAS) kernels. According to some reports, energy savings differ between devices and may cause instabilities

102. Intel

--------------

It's an interactive based governor that is optimized for Intel devices. It is thought to be more battery friendly than interactive while still having good performance. Found only on intel based SOCs.

103. Frankenstein

-------------------------

Based on interactive with hotplugging, it is a performance oriented governor but aims to save battery when screen is off. However, it may be unstable on some devices. Found only on intel based SOCs.

104. Cyan

-------------

Cyan is an interactive based CPU governor intended for heavy gaming and processes. It was originally developed for the i9500, but is now found in kernels for devices with intel SOCs.

105. TheSSJactive

----------------------------

TheSSJactive is based on yankactive but with the addition of hotplugging support for intel SOCs. It is known to be a battery friendly governor.

106. Chill

-------------

A conservative based governor by frap129 (Electron kernel). It's aims to provide more aggressive battery savings while screen is off.

107. sprdemand

----------------------

A modded ondemand governor with functionality to offline CPUs when screen is off. It has thermal control logic implemented into the governor.

108. Kraken

-------------------

Based on ElementalX but with tweaks for better performance while remaining well balanced. Found in Kraken Kernel by Team OctOS.

109. Ironactive

--------------------

Based on the latest CAF 4.4 version of interactive without any additional modifications. It is found in [MENTION=5899304]Tkkg1994[/MENTION]'s superkernel for the Samsung Galaxy S7.

Guide Part 1 Link : http://xdaforums.com/lenovo-a6000/how-to/cpu-governors-hotplug-drivers-gpu-t3528762

Guide Part 3 Link :http://xdaforums.com/lenovo-a6000/how-to/cpu-governors-hotplug-drivers-gpu-t3528771

Guide Part 4 Link : http://xdaforums.com/lenovo-a6000/how-to/cpu-governors-hotplug-drivers-gpu-t3528772

Please Press Thanks Button If It Helped . It Will Encourage Me to Work More For You Guys

THANK YOU