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Android/Kernel Tweaking ~ Team-DomPop Style
I wanted to make sure I got this here, before I forgot what I did to make these awesome tweaks. They should be pretty universal, so long as you can make the edits to the kernels ramdisk. (See your kernel provider for permission and details). I’m going to break this up into sections to make it easier for me to read.
GOALS
My goals for this were pretty simple.
- Low Level Configuration
- Faster Boot Time
- Device Performance Enhancement
- Boot Process Specific Firing of Scripts
CODE
default.prop
Once you have your kernel torn apart, open the file default.prop and add these tweaks in, normally you would put these in your devices build.prop file, however, I want things my way so…
# kevp75 Default Tweaks # Rendering Tweaks debug.composition.type=c2d debug.egl.hw=1 debug.enabletr=true debug.overlayui.enable=1 debug.qctwa.preservebuf=1 debug.performance.tuning=1 debug.sf.hw=1 dev.pm.dyn_samplingrate=1 hw3d.force=1 ro.config.disable.hw_accel=false ro.fb.mode=1 ro.sf.compbypass.enable=0 ro.vold.umsdirtyratio=20 persist.sys.composition.type=c2d persist.sys.ui.hw=1 video.accelerate.hw=1# Enable GPU Acceleration debug.sf.hw=1 video.accelerate.hw=1 debug.performance.tuning=1 persist.sys.composition.type=gpu debug.qc.hardware=true debug.qctwa.statusbar=1 debug.qctwa.preservebuf=1 debug.egl.profiler=1 debug.egl.hw=1 debug.composition.type=gpu hw3d.force=1 ro.product.gpu.driver=1 persist.sys.use_16bpp_alpha=1 persist.sampling_profiler=0 hwui.render_dirty_regions=false hwui.disable_vsync=true# Saves some battery without reducing performances wifi.supplicant_scan_interval=497 pm.sleep_mode=1 power.saving.mode=1 ro.ril.disable.power.collapse=0 ro.vold.umsdirtyratio=20# Battery save pm.sleep_mode=1 ro.ril.disable.power.collapse=0 profiler.force_disable_err_rpt=1 profiler.force_disable_ulog=1 dalvik.vm.checkjni=false dalvik.vm.execution-mode=int:jit ro.ril.power_collapse=1 power_supply.wakeup=enable ro.mot.eri.losalert.delay=1000 ro.config.hw_fast_dormancy=1 ro.config.hw_power_saving=1# Misc Tweaks (enables ADB service) persist.service.adb.enable=1# Sensor Sleep Control ro.ril.sensor.sleep.control=1# Device will boot faster ro.config.hw_fast_dormancy=1 ro.config.hw_quickpoweron=true persist.sys.shutdown.mode=hibernate persist.radio.tdscdma_present=1# Reduce dial-out time ro.telephony.call_ring.delay=0# Allow purge of wp-content to free more ram persist.sys.purgeable_wp-content=1# More free ram and apps load faster dalvik.vm.dexopt-flags=m=y# More RAM persist.service.pcsync.enable=0 persist.service.lgospd.enable=0# Increase general Performance debug.performance.tuning=1# Increase some Performance ro.secure=0 persist.sys.use_16bpp_alpha=1 ro.product.gpu.driver=1 ro.min.fling_velocity=8000# Reduce the black screen time of the proximity sensor ro.lge.proximity.delay=15 mot.proximity.delay=15 ro.ril.enable.amr.wideband=1# TOUCH touch.presure.scale=0.001# Better Scrolling responsiveness and speed windowsmgr.max_events_per_sec=150 ro.max.fling_velocity=15000 ro.min.fling_velocity=8000 ro.min_pointer_dur=8# Smoothens UI persist.service.lgospd.enable=0 persist.service.pcsync.enable=0 ro.ril.enable.a52=1 ro.ril.enable.a53=0# Increase camera's photo and video recording quality ro.media.dec.jpeg.memcap=8000000 ro.media.enc.hprof.vid.bps=8000000 ro.media.enc.hprof.vid.fps=65# Better Flashlight intensity and camera-flash quality ro.media.capture.flash=led ro.media.capture.flashMinV=3300000 ro.media.capture.torchIntensity=40 ro.media.capture.flashIntensity=70 ro.media.capture.maxres=8m ro.media.capture.fast.fps=4 ro.media.capture.slow.fps=120 ro.media.panorama.defres=3264x1840 ro.media.panorama.frameres=1280x720 ro.camcorder.videoModes=true ro.media.enc.hprof.vid.fps=65# Increase the volume steps in-call ro.config.vc_call_steps=20# Better call voice quality. ro.ril.enable.amr.wideband=1# Force launcher into memory ro.HOME_APP_ADJ=1# Disable Bytecode Verification dalvik.vm.verify-bytecode=false dalvik.vm.dexopt-flags=m=y,v=n,o=v# Improves Camera & Video Results ro.media.panorama.defres=3264x1840 ro.media.panorama.frameres=1280x720 ro.camcorder.videoModes=true ime_extend_row_keyboard=true ime_onehand_keyboard=true ime_split_keyboard=true ime_vibration_pattern=0:60# Increase jpg quality to 100% ro.media.enc.jpeg.quality=100# Disable Error reporting and logs profiler.force_disable_err_rpt=1 profiler.force_disable_ulog=1# Disable Sending Usage Data ro.config.nocheckin=1# Fix some application issues (FC) ro.kernel.android.checkjni=0# MMS APN retry timer set to 2 sec( if SMS/MMS couldn`t be sent, it retries after 2 instead of 5 seconds) ro.gsm.2nd_data_retry_config=max/_retries=3, 2000, 2000, 2000# Miscellaneous Tweaks for performance ro.config.hw_menu_unlockscreen=false persist.sys.use_dithering=0 persist.sys.purgeable_wp-content=1 dalvik.vm.dexopt-flags=m=y ro.mot.eri.losalert.delay=1000# Better internet browsing & download speed net.tcp.buffersize.default=4096,87380,256960,4096, 16384,256960 net.tcp.buffersize.wifi=4096,87380,256960,4096,163 84,256960 net.tcp.buffersize.umts=4096,87380,256960,4096,163 84,256960 net.tcp.buffersize.gprs=4096,87380,256960,4096,163 84,256960 net.tcp.buffersize.edge=4096,87380,256960,4096,163 84,256960 net.tcp.buffersize.hspa=6144,87380,524288,6144,163 84,262144 net.tcp.buffersize.lte=524288,1048576,2097152,5242 88,1048576,2097152 net.tcp.buffersize.hsdpa=6144,87380,1048576,6144,8 7380,1048576 net.tcp.buffersize.evdo_b=6144,87380,1048576,6144, 87380,1048576# Smoother video streaming and tweak media media.stagefright.enable-player=true media.stagefright.enable-meta=true media.stagefright.enable-scan=true media.stagefright.enable-http=true media.stagefright.enable-aac=true media.stagefright.enable-qcp=true media.stagefright.enable-record=true# 3G signal and speed tweaks ro.ril.hsxpa=2 ro.ril.gprsclass=10 ro.ril.hep=1 ro.ril.enable.dtm=1 ro.ril.hsdpa.category=10 ro.ril.enable.a53=1 ro.ril.enable.3g.prefix=1 ro.ril.htcmaskw1.bitmask=4294967295 ro.ril.htcmaskw1=14449 ro.ril.hsupa.category=7 ro.ril.hsdpa.category=10 ro.ril.enable.a52=1 ro.ril.set.mtu1472=1 persist.cust.tel.eons=1 ro.config.hw_fast_dormancy=1# GOOGLE DNS net.dns1=8.8.8.8 net.dns2=8.8.4.4 net.rmnet0.dns1=8.8.8.8 net.rmnet0.dns2=8.8.4.4 net.ppp0.dns1=8.8.8.8 net.ppp0.dns2=8.8.4.4 net.wlan0.dns1=8.8.8.8 net.wlan0.dns2=8.8.4.4 net.eth0.dns1=8.8.8.8 net.eth0.dns2=8.8.4.4 net.gprs.dns1=8.8.8.8 net.gprs.dns2=8.8.4.4# CRT persist.sys.screen_off=crt persist.sys.screen_on=none# Support For IPV4 and IPV6 persist.telephony.support.ipv6=1 persist.telephony.support.ipv4=1# ro.com.google.locationfeatures=1 ro.com.google.networklocation=1 htc.audio.alt.enable=0 htc.audio.hac.enable=0# Wireless Tweaks net.ipv4.ip_no_pmtu_disc=0 net.ipv4.route.flush=1 net.ipv4.tcp_ecn=0 net.ipv4.tcp_fack=1 net.ipv4.tcp_mem=187000 187000 187000 net.ipv4.tcp_moderate_rcvbuf=1 net.ipv4.tcp_no_metrics_save=1 net.ipv4.tcp_rfc1337=1 net.ipv4.tcp_rmem=4096 39000 187000 net.ipv4.tcp_sack=1 net.ipv4.tcp_timestamps=1 net.ipv4.tcp_window_scaling=1 net.ipv4.tcp_wmem=4096 39000 18700 wifi.supplicant_scan_interval=180# Video Acceleration Enabled And HW debugging video.accelerate.hw=1 debug.sf.hw=1 debug.performance.tuning=1 debug.egl.profiler=1 # Measure rendering time in adb shell dumpsys gfxinfo debug.egl.hw=1 debug.composition.type=gpu # Disable hardware overlays and use GPU for screen compositing# Disable logcat logcat.live=disable# Better image quality, lower performance. persist.sys.use_dithering=1#Multiwindow persist.splitwindow.support_all=true# MMS APN retry timer set to 2 sec( if SMS/MMS couldn`t be sent, it retries after 2 instead of 5 seconds) ro.gsm.2nd_data_retry_config=max/_retries=3, 2000, 2000, 2000# Flag Tuner ENFORCE_PROCESS_LIMIT=false MAX_SERVICE_INACTIVITY=false MIN_HIDDEN_APPS=false MAX_HIDDEN_APPS=false CONTENT_APP_IDLE_OFFSET=false EMPTY_APP_IDLE_OFFSET=false MAX_ACTIVITIES=false ACTIVITY_INACTIVITY_RESET_TIME=false MAX_RECENT_TASKS=false MIN_RECENT_TASKS=false APP_SWITCH_DELAY_TIME=false MAX_PROCESSES=false PROC_START_TIMEOUT=false CPU_MIN_CHECK_DURATION=false GC_TIMEOUT=false SERVICE_TIMEOUT=false MIN_CRASH_INTERVAL=false# MultiTasking Tweaks ro.config.dha_empty_max=36 ro.config.dha_cached_max=12 ro.config.dha_th_rate=2.3 ro.config.dha_lmk_scale=0.545 ro.config.sdha_apps_bg_max=70 ro.config.sdha_apps_bg_min=8 ro.config.oomminfree_high=7628,9768,11909,14515,16655,20469#Disable Scrolling Cache For Faster Scrolling persist.sys.scrollingcache=3### ViPER4Android lpa.decode=false lpa.releaselock=false lpa.use-stagefright=false tunnel.decode=falselauncher.force_enable_rotation=true fw.max_users=10 fw.show_multiuserui=1
init.rc
Here comes the fun stuff. This is where things can get real screwy, so be real careful what you do in here. Open the file init.rc and add in the sections I specify below, exactly where I specify them…
import /init.dp.rc # Add this line at the top of the file, right under the last existing import
on early-init # Overclock just a tad, through booting boot, also set min scaling and govenor # I use Lean Kernel as my base which allows the overclocking write /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq 2726400 write /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq 2726400 write /sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq 2726400 write /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq 2726400 write /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq 2496000 write /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq 2496000 write /sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq 2496000 write /sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq 2496000 write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor "performance" write /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor "performance" write /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor "performance" write /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor "performance" # At bottom of this put setprop dp.early_init.done 1
on init # At bottom put this: setprop dp.init.done 1
on late-init # At the bottom put this line setprop dp.late_init.done 1
on post-fs # At bottom setprop dp.post_fs.done 1
on post-fs-data # At bottom setprop dp.post_fs_data.done 1
on boot # Above the line class_start core put setprop dp.boot.done 1
What do these all do? Well, right now all they do is create a new property at each stage of the boot process for the kernel. Please google the boot process if you need more information.
init.dp.rc
This is a new file (that we added to init.rc above). Create it now, and put in the following code
# Check Properties on property:dp.early_init.done=1 start dp_early_init start dpu_early_initon property:dp.init.done=1 start dp_init start dpu_initon property:dp.late_init.done=1 start dp_late_init start dpu_late_initon property:dp.post_fs.done=1 start dp_post_fs start dpu_post_fson property:dp.post_fs_data.done=1 start dp_post_fs_data start dpu_post_fs_dataon property:dp.boot.done=1 start dp_boot start dpu_booton property:sys.boot_completed=1 start dp_post_boot start dpu_post_boot# DP User Services service dpu_early_init /sbin/bash /data/dp_scripts/onearlyinit.sh user root disabled oneshotservice dpu_init /sbin/bash /data/dp_scripts/oninit.sh user root disabled oneshotservice dpu_late_init /sbin/bash /data/dp_scripts/onlateinit.sh user root disabled oneshotservice dpu_post_fs /sbin/bash /data/dp_scripts/onpostfs.sh user root disabled oneshot service dpu_post_fs_data /sbin/bash /data/dp_scripts/onpostfsdata.sh user root disabled oneshot service dpu_boot /sbin/bash /data/dp_scripts/onboot.sh user root disabled oneshot service dpu_post_boot /sbin/bash /data/dp_scripts/onpostboot.sh class late_start user root disabled oneshot# DP Services service dp_early_init /sbin/bash /sbin/0/onearlyinit.sh user root disabled oneshotservice dp_init /sbin/bash /sbin/0/oninit.sh user root disabled oneshotservice dp_late_init /sbin/bash /sbin/0/onlateinit.sh user root disabled oneshotservice dp_post_fs /sbin/bash /sbin/0/onpostfs.sh user root disabled oneshot service dp_post_fs_data /sbin/bash /sbin/0/onpostfsdata.sh user root disabled oneshot service dp_boot /sbin/bash /sbin/0/onboot.sh user root disabled oneshot service dp_post_boot /sbin/bash /sbin/0/onpostboot.sh class late_start user root disabled oneshot
This will check for each set property during the boot process and start the services specified. As you can see, I have 2 sets of services. 1 is specifically sitting in the /sbin/0/ folder of the ramdisk. These scripts are the ones that will configure our kernel. The second I added in to allow the users a level of tweaking outside the normal init.d scripts. These all fire at the specified points in the kernel boot process. Rather than posting the files, grab the attached zip file, and see for yourself what I have done. 🙂 I have also included the files above for those that cannot follow directions 😛MEGA: Download Now~ Happy Tweaking!