[REF] Startup script speed tweaks
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oh, I thought he just wanted to parse the output by long listing
and I didnt know there's a -1
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Hi. For vm.swappiness, a value of 0 means "do not swap unless out of free RAM", a value of 100 means "swap whenever possible". The default is 60 which is okay for normal Linux installations.On my GNU/Linux system I've set vm.swappiness to 10, because I've got plenty MiB of RAM and I don't want my system to swap a lot. Is this swappiness the same as Linux? Because that would mean having the system to use more RAM, and since we don't have much of that available by default, I'm just surprised you didn't set a higher value. (I'm not saying you don't know what you're doing, I just want to learn how it works!)
By the way, this script is going to be a must-have, I think you've put an excellent effort on i9000 Android development!Thanks for sharing!
Swap = move portions of programs in RAM to disk (swap partition or file), to free up RAM so that more programs can run.
However Android by default doesn't have any swap partition or files (there is nowhere to swap to). It doesn't really need it though, since it has its own memory management system, so swap is never used. Nevertheless, I feel safer setting it to 0.
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That's strange. Could be different busybox versions. I am using busybox 1.17. The idea is to get a list of directories. If that doesn't work, you can manually put in the list of correct devices.
No there won't be any significant change in Quadrant. This is more for responsiveness and to reduce the lags.
strange, because if you change write params and remove lags this should give some results..
Im sure it will. But i dont trust quadrant anyhow lol. Cant wait to get home and play around with this!!
Thank you, it's clearer now!
I didn't know that Android doesn't have a swap partition!
that's because the ls (and mount) commands are executed from /system/bin instead of /system/xbin, therefore the syntax and format of output is not supported.
either add PATH=/system/xbin:$PATH before the execution of rest of scripts, or add alias, e.g.
alias ls='/system/xbin/ls'
alias mount='/system/xbin/mount'
I put them into a script for downloadable..
edit: btw, I applied the tweak and it feels much snappier than before. Thanks!
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I can confirm that the read/write performance to rfs partitions do increase by this.
From write 1,5 mb/s to 2,2 mb/s and read 55 mb/s to 86 mb/s.
test for write: dd if=/dev/zero of=/data/test count=30000
test for read: dd if=/data/test of=/dev/zero
From write 1,5 mb/s to 2,2 mb/s and read 55 mb/s to 86 mb/s.
test for write: dd if=/dev/zero of=/data/test count=30000
test for read: dd if=/data/test of=/dev/zero
this script for sure should be reworked.
i have no /system/sbin/ls, only usual ls.
btw, "-1" option non required, because "ls" anyway print 1 file per line (at least at JP6 stock firmware).
second,
and moreover, "mount" require "device" at JP6:
i have no /system/sbin/ls, only usual ls.
btw, "-1" option non required, because "ls" anyway print 1 file per line (at least at JP6 stock firmware).
second,
Code:
# mount | cut -d " " -f3
mount | cut -d " " -f3
rootfs
tmpfs
devpts
proc
sysfs
cgroup
j4fs
tmpfs
cgroup
rfs
rfs
rfs
rfs
rfs
vfat
vfat
vfat
tmpfs
#and moreover, "mount" require "device" at JP6:
Code:
# mount -o remount,rw /system
mount -o remount,rw /system
Usage: mount [-r] [-w] [-o options] [-t type] device directory
#I use busybox 1.17.
The expected output of the command should be:
mount | cut -d " " -f3
/
/dev
/dev/pts
/proc
/sys
/acct
/mnt/.lfs
/mnt/asec
/dev/cpuctl
/system
/data
/dbdata
/cache
/efs
You can also put in the names of the mount points manually.
theres no fstab in my JP6 so i cant really use the remount thing since need both device name and directory.. maybe use awk or sed instead of cut?
Does the above as-is run without issue on your phones? Cause the output I get are single line display of the files in the directory. I think expected behaviour is the directory itself?
Like:
NOW
Code:
adb shell ls -1 /sys/block/bml10
bdi
capability
dev
ext_range
holders
power
queue
range
removable
ro
size
slaves
stat
subsystem
ueventSHOULD BE:
Code:
adb shell ls -d -1 /sys/block/bml*
/sys/block/bml0!c
/sys/block/bml1
/sys/block/bml10
/sys/block/bml2
/sys/block/bml3
/sys/block/bml4
/sys/block/bml5
/sys/block/bml6
/sys/block/bml7
/sys/block/bml8
/sys/block/bml9in order to make the script work.
To do so I added " -d " to the ls command, ex. "ls -d -1 /sys/block/bml*"
It doesn't need fstab to work. Maybe the output of your mount command is different? The idea is to get a list of all the mount points. Or just manually put them in.
Sent from my GT-I9000 using XDA App
That's the desired output. I think it's not running because u issued the command using adb.
Try
Adb shell
su
Sent from my GT-I9000 using XDA App
because mount in /system/sbin has different output format than mount in /system/xbin (which is from busybox), and thereofre it appears to have wrong syntax when it's becasue the device is retrieved wrongly from the cut command.
use the script posted above, it'll work correctly.
use the script posted above, it'll work correctly.
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19Hi guys,
UPDATE: Over time, I've modified some of these values in my SpeedMod kernel. The values here may not be the best ones.
NOTE: These tweaks are now included in kernels based on sztupy's Universal Lagfix, for example:
http://xdaforums.com/showthread.php?t=822756
But they must be manually activated from the recovery menu.
I've been using Linux kernel tweaks in a startup script to make the phone smoother.
With these tweaks, the phone is quite smooth and fast even without using the filesystem lagfixes.
These settings are only useful for you if you know how to create and modify a startup script. I use the old playlogos hack myself, but I'm sure there are many new ways to do it now.
EDIT: Explanations:Code:# Tweak cfq io scheduler for i in $(ls -1 /sys/block/stl*) $(ls -1 /sys/block/mmc*) $(ls -1 /sys/block/bml*) $(ls -1 /sys/block/tfsr*) do echo "0" > $i/queue/rotational echo "1" > $i/queue/iosched/low_latency echo "1" > $i/queue/iosched/back_seek_penalty echo "1000000000" > $i/queue/iosched/back_seek_max echo "3" > $i/queue/iosched/slice_idle done # Remount all partitions with noatime for k in $(busybox mount | grep relatime | cut -d " " -f3) do sync busybox mount -o remount,noatime $k done # Tweak kernel VM management echo "0" > /proc/sys/vm/swappiness #echo "10" > /proc/sys/vm/dirty_ratio #echo "4096" > /proc/sys/vm/min_free_kbytes # Tweak kernel scheduler, less aggressive settings echo "18000000" > /proc/sys/kernel/sched_latency_ns echo "3000000" > /proc/sys/kernel/sched_wakeup_granularity_ns echo "1500000" > /proc/sys/kernel/sched_min_granularity_ns # Misc tweaks for battery life echo "2000" > /proc/sys/vm/dirty_writeback_centisecs echo "1000" > /proc/sys/vm/dirty_expire_centisecs
# Remount all partitions with noatime
atime is a setting where the filesystem updates the access time of a file. This creates a write-after-every-read which slows things down. By default all partitions are mounted with relatime, which is an optimized version of atime. noatime is the fastest, and afaik we don't need atime.
# Tweak cfq io scheduler
Tweaked settings of the disk io scheduler more for flash memory. Defaults are optimized for spinning harddisks. Lowered the idle wait, re-enable the low latency mode of cfq, removed the penalty for back-seeks and explicitly tell the kernel the storage is not a spinning disk.
# Tweak kernel VM management
Set tendency of kernel to swap to minimum, since we don't use swap anyway.
Lower the amount of unwritten write cache to reduce lags when a huge write is required.
Increase tendency of kernel to keep block-cache to help with slower RFS filesystem.
Increase minimum free memory, in theory this should make the kernel less likely to suddenly run out of memory.
# Tweak kernel scheduler
Make the task scheduler more 'fair' when multiple tasks are running. This has a huge effect on UI and App responsiveness. These values (less aggressive settings) are 20% of the Linux defaults, and about half of the Android defaults.
# Miscellaneous tweaks
Increase the write flush timeouts to save some battery life.
___________________________________
EDIT: How to create/use a startup script:
You need root and busybox for this.
This procedure is adapted from the old OCLF which used this method to create a startup script in /system/userinit.sh
Check if the file /system/userinit.sh exists. If it does, u should just edit that file as the startup script and DO NOT do the procedure below.
Here's how to do it manually. Do this only if some other lagfix/patch has not already done the playlogos hack, otherwise u might overwrite the other script!
Create the startup script on your PC. Use adb to push it to /sdcard/userinit.sh
adb push userinit.sh /sdcard/userinit.sh
On your PC, create a file called playlogos1 with this content:
#!/system/bin/sh
sh /data/userinit.sh
playlogosnow
Use adb to push the playlogos1 file to /sdcard/playlogos1
adb push playlogos1 /sdcard/playlogos1
Now use adb shell, su and do this:
busybox mount -o remount,rw /system;
busybox cp /sdcard/userinit.sh /data/userinit.sh;
busybox mv /system/bin/playlogos1 /system/bin/playlogosnow;
busybox cp /sdcard/playlogos1 /system/bin/playlogos1;
chmod 755 /system/bin/playlogos1;
chmod 755 /data/userinit.sh;
The startup script will be /data/userinit.sh
The reason I put the startup script in /data is so that if you mess up the startup script and get stuck during boot, you can do a "clear data" from recovery, and the startup script will be erased.2
Startup scripts r a bit tricky if the kernel doesn't support it. I suggest u check out my speedmod kernel which already has these tweaks and also startup script support.111
The aosp windowmanager (android framework) ignores values <35. (Samsung could have changed something here, but that is very unlikely).
That value does not affect the framerate, but how many touch events are reported to the apps; this saves some cpu if the user keeps touching the screen.
