v2 (20191221)

new: Set ZRAM default size based on physical memory size
new: Set minfree based on physical memory size
new: Optional ZRAM level of 2.5GB
improve: Do not change comp_algorithm to LZ4, use only default values
improve: Removed memcg that caused long freezes to reduce excessive page cache drops
improve: Keep page cache more aggressive under high memory pressure
fix: 2 zram devices are not turned off on LG devices
fix: Setting zram size to 0 shows 1.5
fix: swapon swapoff compatibility issues prevent enabling ZRAM
Signed-off-by: Matt Yang <yccy@outlook.com>

README.md

@@ -1,19 +1,36 @@
 # Memory management optimaization for Qualcomm platform
 
+## Feature
+
 English version:
-- Remove QTI ActivityManager CUR_MAX_EMPTY_PROCESSES limit
-- lowmemorykiller tend to keep tasks which adj < 950
-- lowmemorykiller tend to remove tasks which adj >= 950
+- Pure memory management optimization module, not containing other placebo and supporting mainstream Snapdragon platforms
+- Solve the problem that the background can't hang even if the free memory is large, by removing QTI ActivityManager CUR_MAX_EMPTY_PROCESSES
 - Disable automatic kill when vmpressure >= 90
-- Higher watermark_mid reduces the possibility of direct memory allocation
-- Avoid swapping latency intensive processes, such as `system_server`, `systemui` and `launcher`
+- Reduce jitters under high memory pressure, lowmemorykiller tends to kill the process of adj> = 950, so that the file page cache is kept at a high level
+- Reduce stucks under high memory pressure, reduce the probability of direct memory allocation via higher watermark_mid
+- Avoid swapping memory pages which are hard to compress to ZRAM, make the compression rate close to the ideal value of 2.8x
+- ~~Avoid swapping latency intensive processes, such as `system_server`, `systemui` and `launcher`~~
 - Customizable ZRAM size, ranging from 0G to 6G, please edit `/sdcard/qti_mem_panel.txt` after install
 
 中文版：
-- 移除 QTI ActivityManager CUR_MAX_EMPTY_PROCESSES 最大空进程数量的限制
-- lowmemorykiller 倾向于保留 adj < 950 的进程
-- lowmemorykiller 倾向于结束 adj >= 950 的进程
-- 禁止当`vmpressure >= 90`时激进地清理后台
-- 较高的低内存水位线降低触发直接内存分配的概率
-- 避免把延迟敏感的进程移入ZRAM，比如Android系统服务、Android系统界面和桌面
+- 纯粹的内存管理优化模块，不含其它大杂烩，支持骁龙主流平台
+- 解决即使剩余内存较多，后台也挂不住的问题，通过移除最大空进程数量(CUR_MAX_EMPTY_PROCESSES)的限制
+- 禁止当`vmpressure >= 90`时自适应LMK激进地清理后台
+- 减轻高内存压力下掉帧，lowmemorykiller 倾向于结束 adj >= 950 的进程，使文件页面缓存保持在较高水平
+- 减轻高内存压力下卡屏，较高的低内存水位线，降低触发直接内存分配的概率
+- 避免难以压缩的内存页移入ZRAM，使得压缩率接近理想值2.8x
+- ~~避免把延迟敏感的进程移入ZRAM，比如系统框架和桌面，通过MEMCG分组swapiness实现~~
 - 可自定义的ZRAM大小，较大的值会延长解压缩时间，范围从0GB到6GB，在安装后请修改`/sdcard/qti_mem_panel.txt`
+
+## Note
+
+- Magisk >= 17.0
+- 安装模块重启，打开/sdcard/qti_mem_panel.txt修改想要的ZRAM大小，重启后生效
+- ZRAM大小默认值，也可自定义
+  - 3GB内存推荐1.0GB的ZRAM
+  - 4GB内存推荐1.0GB的ZRAM
+  - 6GB内存推荐1.5GB的ZRAM
+  - 8GB内存推荐2.5GB的ZRAM
+  - 12GB内存推荐0GB的ZRAM
+- 一加用户需要关闭“RamBoost启动加速”这个预读器
+- 目前不支持ZSWAP

common/service.sh

@@ -3,4 +3,4 @@
 # This will make your scripts compatible even if Magisk change its mount point in the future
 MODDIR=${0%/*}
 
-/vendor/bin/sh $MODDIR/system/vendor/bin/qti-mem-opt/powercfg_once.sh
+$MODDIR/script/powercfg_once.sh

common/system.prop

@@ -7,5 +7,4 @@
 # CUR_MAX_EMPTY_PROCESSES = CUR_MAX_CACHED_PROCESSES/2
 # working on android 9, not 10
 ro.vendor.qti.sys.fw.bg_apps_limit=600
-ro.vendor.qti.sys.fw.bservice_limit=30
-ro.vendor.qti.sys.fw.bservice_age=86400
+ro.vendor.qti.sys.fw.bservice_limit=60

install.sh

@@ -122,9 +122,10 @@ REPLACE=""
 
 print_modname() {
   ui_print ""
-  ui_print "QTI memory optimization https://github.com/yc9559/qti-mem-opt"
+  ui_print "QTI memory optimization"
+  ui_print "https://github.com/yc9559/qti-mem-opt"
   ui_print "Author: Matt Yang"
-  ui_print "Version: v1 (20191214)"
+  ui_print "Version: v2 (20191221)"
   ui_print ""
 }
 
@@ -135,6 +136,7 @@ on_install() {
   ui_print "- The platform of this device is $target"
   ui_print "- Extracting module files"
   unzip -o "$ZIPFILE" 'system/*' -d $MODPATH >&2
+  unzip -o "$ZIPFILE" 'script/*' -d $MODPATH >&2
 }
 
 # Only some special files require specific permissions
@@ -143,14 +145,13 @@ on_install() {
 
 set_permissions() {
   # The following is the default rule, DO NOT remove
-  set_perm_recursive $MODPATH 0 0 0755 0644
+  set_perm_recursive $MODPATH 0 0 0755 0755
 
   # Here are some examples:
   # set_perm_recursive  $MODPATH/system/lib       0     0       0755      0644
   # set_perm  $MODPATH/system/bin/app_process32   0     2000    0755      u:object_r:zygote_exec:s0
   # set_perm  $MODPATH/system/bin/dex2oat         0     2000    0755      u:object_r:dex2oat_exec:s0
   # set_perm  $MODPATH/system/lib/libart.so       0     0       0644
-  set_perm $MODDIR/system/vendor/bin/qti-mem-opt/powercfg_once.sh 0 2000 0755 u:object_r:vendor_file:s0
 }
 
 # You can add more functions to assist your custom script code

module.prop

@@ -1,6 +1,6 @@
 id=qti-mem-opt
 name=QTI memory optimization
-version=v1 (20191214)
+version=v2 (20191221)
 versionCode=1
 author=Matt Yang
 description=Memory management optimaization for Qualcomm platform. Repo: https://github.com/yc9559/qti-mem-opt

system/vendor/bin/qti-mem-opt/powercfg_lib.sh → script/powercfg_lib.sh

@@ -1,16 +1,16 @@
-#! /vendor/bin/sh
+#! /system/bin/sh
 # Powercfg Library
 # https://github.com/yc9559/
 # Author: Matt Yang
-# Version: 20191214
+# Version: 20191221
 
 ###############################
 # PATHs
 ###############################
 
 module_dir="/data/adb/modules/qti-mem-opt"
-script_rel=/system/vendor/bin/qti-mem-opt
-perfcfg_rel=/system/vendor/etc/perf
+script_rel="./script"
+perfcfg_rel="/system/vendor/etc/perf"
 panel_path="/sdcard/qti_mem_panel.txt"
 
 ###############################
@@ -24,6 +24,8 @@ cpu_dev=/sys/devices/system/cpu
 ksgl=/sys/class/kgsl/kgsl-3d0
 devfreq=/sys/class/devfreq
 lpm=/sys/module/lpm_levels/parameters
+vm=/proc/sys/vm
+lmk=/sys/module/lowmemorykiller/parameters
 
 ###############################
 # Basic tool functions
@@ -84,6 +86,17 @@ read_cfg_value()
     echo $value
 }
 
+# $1:content
+write_panel()
+{
+    echo "$1" >> $panel_path
+}
+
+clear_panel()
+{
+    true > $panel_path
+}
+
 wait_until_login()
 {
     # we doesn't have the permission to rw "/sdcard" before the user unlocks the screen

script/powercfg_once.sh

@@ -0,0 +1,196 @@
+#! /system/bin/sh
+# QTI memory optimization
+# https://github.com/yc9559/qti-mem-opt
+# Author: Matt Yang
+# Version: v2 (20191221)
+
+# Runonce after boot, to speed up the transition of power modes in powercfg
+
+# load lib
+module_dir="/data/adb/modules/qti-mem-opt"
+script_rel="./script"
+. $module_dir/$script_rel/powercfg_lib.sh
+
+MemTotalStr=`cat /proc/meminfo | grep MemTotal`
+MemTotal=${MemTotalStr:16:8}
+zram_size="0"
+
+config_minfree()
+{
+    minfree=""
+    # <= 4GB
+    if [ $MemTotal -le 4197304 ]; then
+        minfree="19200,25600,76800,102400,128000,153600"
+    # == 6GB
+    elif [ $MemTotal -le 6291456 ]; then
+        minfree="19200,25600,128000,153600,179200,204800"
+    # == 8GB
+    elif [ $MemTotal -le 8388608 ]; then
+        minfree="19200,25600,179200,204800,230400,256000"
+    # > 8GB
+    else
+        minfree="19200,25600,256000,307200,358400,409600"
+    fi
+
+    # minfree unit(page size): 4K
+    lock_val "$minfree" $lmk/minfree
+}
+
+# $return:value(string)
+calc_zram_default_size()
+{
+    value=""
+    # <= 4GB
+    if [ $MemTotal -le 4197304 ]; then
+        value="1"
+    # == 6GB
+    elif [ $MemTotal -le 6291456 ]; then
+        value="1.5"
+    # == 8GB
+    elif [ $MemTotal -le 8388608 ]; then
+        value="2.5"
+    # >= 8GB
+    else
+        value="0"
+    fi
+    echo $value
+}
+
+stop_zram()
+{
+    # LG devices may have 2 zram block devices
+    /system/bin/swapoff /dev/block/zram0
+    /vendor/bin/swapoff /dev/block/zram0
+    /system/bin/swapoff /dev/block/zram1
+    /vendor/bin/swapoff /dev/block/zram1
+    mutate "1" /sys/block/zram0/reset
+    mutate "1" /sys/block/zram1/reset
+    mutate "0" /sys/block/zram0/disksize
+    mutate "0" /sys/block/zram0/mem_limit
+    mutate "0" /sys/block/zram1/disksize
+    mutate "0" /sys/block/zram1/mem_limit
+}
+
+# $1:disksize $2:mem_lim
+start_zram()
+{
+    stop_zram
+    # do not touch comp_algorithm, somebody may prefer zstd
+    # usually not shipped with stock kernels
+    # lock_val "lz4" /sys/block/zram0/comp_algorithm
+    # bigger zram means more blocked IO caused by the zram block device swapping out
+    lock_val $1 /sys/block/zram0/disksize
+    lock_val $2 /sys/block/zram0/mem_limit
+    # fix compatibility issues
+    /system/bin/mkswap /dev/block/zram0
+    /vendor/bin/mkswap /dev/block/zram0
+    /system/bin/swapon /dev/block/zram0 -p 23333
+    /vendor/bin/swapon /dev/block/zram0 -p 23333
+    # zram doesn't need much read ahead(random read)
+    lock_val "0" /sys/block/zram0/queue/read_ahead_kb
+    lock_val "0" $vm/page-cluster
+}
+
+config_zram()
+{
+    # load size from file
+    zram_size=`read_cfg_value zram_size`
+    case "$zram_size" in
+    "0.0"|"0"|"0.5"|"1.0"|"1"|"1.5"|"2.0"|"2"|"2.5"|"3.0"|"3"|"4.0"|"4"|"5.0"|"5"|"6.0"|"6") 
+    ;;
+    *) 
+        zram_size=`calc_zram_default_size`
+    ;;
+    esac
+
+    # ~2.8x compression ratio
+    # higher disksize result in larger space-inefficient SwapCache
+    case "$zram_size" in
+    "0.0"|"0") 
+        stop_zram
+    ;;
+    "0.5") 
+        start_zram 512M 160M
+    ;;
+    "1.0"|"1") 
+        start_zram 1024M 360M
+    ;;
+    "1.5") 
+        start_zram 1536M 540M
+    ;;
+    "2.0"|"2") 
+        start_zram 2048M 720M
+    ;;
+    "2.5") 
+        start_zram 2560M 900M
+    ;;
+    "3.0"|"3") 
+        start_zram 3072M 1080M
+    ;;
+    "4.0"|"4") 
+        start_zram 4096M 1440M
+    ;;
+    "5.0"|"5") 
+        start_zram 5120M 1800M
+    ;;
+    "6.0"|"6") 
+        start_zram 6144M 2160M
+    ;;
+    esac
+}
+
+save_panel()
+{
+    clear_panel
+    write_panel ""
+    write_panel "QTI memory optimization"
+    write_panel "https://github.com/yc9559/qti-mem-opt"
+    write_panel "Author:   Matt Yang"
+    write_panel "Version:  v2 (20191221)"
+    write_panel ""
+    write_panel "[current status]"
+    write_panel "ZRAM size: $zram_size"
+    write_panel "Last:      `date '+%Y-%m-%d %H:%M:%S'`"
+    write_panel ""
+    write_panel "[settings]"
+    write_panel "# Available size(GB): 0 / 0.5 / 1 / 1.5 / 2 / 2.5 / 3 / 4 / 5 / 6"
+    write_panel "zram_size=$zram_size"
+    write_panel ""
+}
+
+# suppress stderr
+(
+
+wait_until_login
+
+config_zram
+
+# copy of common\system.prop
+setprop ro.vendor.qti.sys.fw.bg_apps_limit 600
+setprop ro.vendor.qti.sys.fw.bservice_limit 60
+
+# config traditional LMK
+config_minfree
+lock_val "0,200,920,930,940,950" $lmk/adj
+# disable automatic kill when vmpressure >= 90
+lock_val "0" $lmk/enable_adaptive_lmk
+# please kill all the processes we really don't want when vmpressure >= 90
+# lock_val "960" $lmk/adj_max_shift
+# shorter shrinker(LMK) calling interval
+lock_val "16" $lmk/cost
+
+# higher watermark_mid reduces direct memory allocation
+# 7477M, watermark_mid - watermark_min = 124M
+lock_val "32768" $vm/min_free_kbytes
+lock_val "51200" $vm/extra_free_kbytes
+# lower to reduce useless page swapping
+lock_val "100" $vm/watermark_scale_factor
+# more room for page cache
+lock_val "100" $vm/swappiness
+lock_val "120" $vm/vfs_cache_pressure
+
+# save mode for automatic applying mode after reboot
+save_panel
+
+# suppress stderr
+) 2> /dev/null