Database Develop

[Q]Does Quasar kernel support swap?

hi guys,Does Quasar kernel support swap?and how to enable it?
i tried to enable it but failed
and i'm thinking about there's a lot of free space that i never used in /data and /system,so why don't we use those useless space to swap for more ram?
or we can use ZRAM?and how to use it?

we have 512 mb memory, for what you want swap?

actually the ram we can use only have less than 300mb

hmm partitionning SDC should do the job, isn't it ? do "ext" partitions have something to do with that ?

I think there's no reason to use swap, but dxdiag32's idea is not bad... internal memory is quicker than sd...
Regards.

Nah, it doesn't support it.
I did some tests with ZRAM and ZCache back in the LG P500 days and it didn't seem to help with anything so I usually disable Swap support now.
Anyway, you can always mount a tmpfs partition to some applications to boost their I/O operations if that's what you're looking for.
Huexxx said:
I think there's no reason to use swap, but dxdiag32's idea is not bad... internal memory is quicker than sd...
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Click to collapse
Depends on the microSD card's class. A class 10 is faster than internal memory.
In fact, it's a shame they dropped the yaffs2 filesystem as in non-sequential I/O operations it's the best one.

Class10 is faster? At least internal memory will be less energy hungry... won't be?

Huexxx said:
Class10 is faster? At least internal memory will be less energy hungry... won't be?
Click to expand...
Click to collapse
Yes, class 10 (>= 10 mb/s write speed) is faster than internal memory.
This is why moving app, data and dalvik to microSD when you have such microSD provides a good boost on I/O operations. There's many folks using the combo CM + S2E + MicroSD Class 10.
As for battery, it's a good question but I bet it should be the same. I/O stuff isn't heavy.

most of us now is using C4 sdcard,at least in China is .so i wanna give us some more performance.my free space in /data partition keep more than 800MB for a long time,and i think more ram can provide us more stable phone.

Beware that RAM works differently for Android devices.
Whereas free RAM in Windows is arguably better than occupied RAM, this is not so for Android. In Android, having RAM allocated is good which is also behind the reason of why we shouldn't use task killers. That being said, we don't really need more than 512 MB of RAM for a heapsize of 32 MB and proper OOM groupings and adj values! Even with an aggressive usage, it's unlikely you'll manage to trigger an OOM (out of memory) throughout your day.
Here's an oldie but goldie article regarding this:
http://lifehacker.com/5650894/andro...ed-what-they-do-and-why-you-shouldnt-use-them

ok got it , thanks knzo

knzo said:
we shouldn't use task killers.
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Click to collapse
I understand the theory but because of my own experience I do not agree in 100% with You. My previous smartphone was Samsung Spica ( not much RAM ). I used to use my favourite IGO for navigation. It was impossible to succesfully launch IGO if I have not used task killer before.
Without task killer IGO just started and vanished within seconds.

pabgar said:
I understand the theory but because of my own experience I do not agree in 100% with You. My previous smartphone was Samsung Spica ( not much RAM ). I used to use my favourite IGO for navigation. It was impossible to succesfully launch IGO if I have not used task killer before.
Without task killer IGO just started and vanished within seconds.
Click to expand...
Click to collapse
That's because IGO triggered an OOM event and the ROM you had instead of doing an intelligent swipe and killing applications based on certain heuristics, was killing the process responsible for the OOM instead (IGO). It's a flag in sysctl called: OOM kill allocating task.
So in that case, it was just a lousy ROM/kernel. Or perhaps in Spica (old kernel, old android version) there wasn't this setting and the phone always killed the application that made the phone run out of memory. This explains why it vanished after a bit.
Either way I stand correct, there's no need for task killers in a device with >= 256 MB of RAM or properly configured.

knzo said:
That's because IGO triggered an OOM event and the ROM you had instead of doing an intelligent swipe and killing applications based on certain heuristics, was killing the process responsible for the OOM instead (IGO). It's a flag in sysctl called: OOM kill allocating task.
So in that case, it was just a lousy ROM/kernel. Or perhaps in Spica (old kernel, old android version) there wasn't this setting and the phone always killed the application that made the phone run out of memory. This explains why it vanished after a bit.
Either way I stand correct, there's no need for task killers in a device with >= 256 MB of RAM or properly configured.
Click to expand...
Click to collapse
Agreed. I still have my old Galaxy Apollo, with 256 MB ram it goes perfectly as it should. In fact, on a careful observation i 've noticed that if we use taskkiller at autokill level at let's say 30 minutes autokill, it will technicall consume 4 CPU cycles in an hour for each app (two for killing, and two when applications like gmail/facebook etc. starts automatically again).. but without taskkiller they may have stay idle, and not used any CPU cycle at all for as many hours as phone is idle. And for battery purpose, it is the CPU cycle that drain, not the used memory !

in my opinion,we only need to kill the apps that use internet in background to save battery.such as Google Maps,once i used it,its services stay in background and after 3 hours i didn't use phone do anything,battery drain 3%,and if i kill it,no battery drain after all

Google Maps and DRM service process sometimes cause battery drains indeed.

knzo said:
Google Maps and DRM service process sometimes cause battery drains indeed.
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Click to collapse
i deleted DRM service,and seems it's no harm to system

Lol but do you know what is it function ?
Sent from my LG-P970 using xda premium

I've seen drm using a lot of CPU as well from time to time. What is it used for and how would you go about removing it?
dxdiag32 said:
i deleted DRM service,and seems it's no harm to system
Click to expand...
Click to collapse
Sent from my LG-P970 using XDA App

masterthor said:
I've seen drm using a lot of CPU as well from time to time. What is it used for and how would you go about removing it?
Sent from my LG-P970 using XDA App
Click to expand...
Click to collapse
You can use Titanium https://market.android.com/details?id=com.keramidas.TitaniumBackup
-Go to Backup/Restore tab
-Find by DRM Protected Content Storage
-Click and select Freeze
Now the app is Freeze and the system don't see more!

[Q]need help with RAM

I'm using Team ICSSGS RC4.2 ROM on my cappy with Glitch 14 B5 kernel
OC-ed my device to 1.2 with 1350 mV with NSTools
it is wuaite snappy but I get around 50-70MB free RAM most of the time
I'm using RAM Manager Pro to monitor my RAM
Using Nova launcher with 3-4 widgets on
I'm getting ~1500 points in Quadrant bench with 1.2 GHz OC
any advice on improving RAM and what else can I do to tweak my cappy for max performance ?

There's been a lot of discussion about the things you're mentioning, so I'll distill down the key points:
1. Free RAM = Wasted RAM. Android loads programs into RAM to keep them quickly accessible for faster load times. If a program needing more RAM opens, Dalvik will kill other things in RAM to make room.
2. Quandrant Score = very poor metric. The idea of a Quadrant Score, while good in theory, can be manipulated in a lot of ways to where the results aren't as useful as we all would like them to be.
If you're wanting to improve performace, it sounds like you've already got a decent start. Overclocking can help a little, and not having a lot of widgets running helps, too. You may also want to try different kernels - some will respond better to your phone than others.

jmtheiss said:
There's been a lot of discussion about the things you're mentioning, so I'll distill down the key points:
1. Free RAM = Wasted RAM. Android loads programs into RAM to keep them quickly accessible for faster load times. If a program needing more RAM opens, Dalvik will kill other things in RAM to make room.
2. Quandrant Score = very poor metric. The idea of a Quadrant Score, while good in theory, can be manipulated in a lot of ways to where the results aren't as useful as we all would like them to be.
If you're wanting to improve performace, it sounds like you've already got a decent start. Overclocking can help a little, and not having a lot of widgets running helps, too. You may also want to try different kernels - some will respond better to your phone than others.
Click to expand...
Click to collapse
Also installed Autokiller memory optimiser and enabled tweaks from there
I also messed with Rom manager and its kernel tweaks

Lag on every rom

Thats it,last time i've been triying multiple roms wich are full perfomance like CM7 Droid Ace,Stock Revoultion Light V3,SGSII v10,and many more,actually im on sperience and i have same issue,wich could be the problem? there are my overclock settings
I use 245-864 smartassv2 noop i/o
ram booster to clean up under 40mb
ram manager
tweaks
also i only have 30 apps installed with int2ext+
nothing else,and my phone lags like a hell,i've read some people that have over than 60 apps and their phones still lag-free
I have tried adrenaline engine,lagfree script,slaidmod,slaidyboost,v6 supercharger ( obviosly not all togheter :dumb but in any case i cant get lagfree phone,i know it isnt the best phone but is there a way to have it without lags? help me plz..

You don't need any RAM managing scripts/apps/whatever.
All they do is actually slow it down, as when you open apps, they're stored in RAM so you can open them again later. If you clear RAM all the time, you'll have to load the app every time you want to open it.
Depending on your launcher, this may be a problem with scrolling lag too.
My advice is just remove any RAM managing...stuff.

I'm using Wp7 extreme rom its modified to the Max with visuals and IV got 15 apps on top of that, I haven't even over clocked it and its still smooth and fast with no lag and IV got 1gb partition, the rom it self sorts the has built in app2sd, not the app, it also comes with ram manager what I haven't used yet so maybe try this rom and also try clearing cache on all the apps this has a massive impact on performance
Sent from my GT-S5830

spior said:
You don't need any RAM managing scripts/apps/whatever.
All they do is actually slow it down, as when you open apps, they're stored in RAM so you can open them again later. If you clear RAM all the time, you'll have to load the app every time you want to open it.
Depending on your launcher, this may be a problem with scrolling lag too.
My advice is just remove any RAM managing...stuff.
Click to expand...
Click to collapse
You don't need a ram manager, huh? So when you have 50+ apps and 25MB ram left with your phone TRYING to crawl through whatever you're doing, what will you do? Close them all up one by one to free up ram?
Amazing how all these devs make ram managers just for show, huh. They must be pretty bored.
---------- Post added at 01:27 AM ---------- Previous post was at 01:25 AM ----------
Blackstard said:
Thats it,last time i've been triying multiple roms wich are full perfomance like CM7 Droid Ace,Stock Revoultion Light V3,SGSII v10,and many more,actually im on sperience and i have same issue,wich could be the problem? there are my overclock settings
I use 245-864 smartassv2 noop i/o
ram booster to clean up under 40mb
ram manager
tweaks
also i only have 30 apps installed with int2ext+
nothing else,and my phone lags like a hell,i've read some people that have over than 60 apps and their phones still lag-free
I have tried adrenaline engine,lagfree script,slaidmod,slaidyboost,v6 supercharger ( obviosly not all togheter :dumb but in any case i cant get lagfree phone,i know it isnt the best phone but is there a way to have it without lags? help me plz..
Click to expand...
Click to collapse
The Ace can't run anything COMPLETELY lag-free because of it's lack of hardware. I've tweaked my phone to the max and it's already as "lag-free" as it can get. And it STILL has its slowdown moments. Don't feel bad, it's not just your phone.

Blackstard said:
Thats it,last time i've been triying multiple roms wich are full perfomance like CM7 Droid Ace,Stock Revoultion Light V3,SGSII v10,and many more,actually im on sperience and i have same issue,wich could be the problem? there are my overclock settings
I use 245-864 smartassv2 noop i/o
ram booster to clean up under 40mb
ram manager
tweaks
also i only have 30 apps installed with int2ext+
nothing else,and my phone lags like a hell,i've read some people that have over than 60 apps and their phones still lag-free
I have tried adrenaline engine,lagfree script,slaidmod,slaidyboost,v6 supercharger ( obviosly not all togheter :dumb but in any case i cant get lagfree phone,i know it isnt the best phone but is there a way to have it without lags? help me plz..
Click to expand...
Click to collapse
mate buy a new better phone

Maybe is the MicroSD card, buy a Class 10 one :3 (Or maybe yours is broken)

✪Tips to speed up your nexus7✪

Sometimes we feel that our nexus 7 us getting slower.Here are some tips to speed it up again!!
1 Free Up Some Space
Many people report that the Nexus 7 slows down as it fills up. When the 16GB Nexus 7 gets to about 3GB of storage space left, it begins to slow down.so freeing some space helps a lot.
2 Disable Currents Background Sync & Other Background Apps
Google Currents syncing is a notorious cause of lag on the Nexus 7. If your Nexus 7 is too slow or isn’t responding to touch events properly, open the Currents app, go into its Settings screen, and disable the Syncing option. This will prevent Google Currents from constantly downloading and writing data in the background.You may also want to disable background-syncing in other apps, or set them to sync infrequently — similar problems could be caused by other apps downloading and writing data in the background.
3 Delete Multiple User Accounts
If you have multiple user accounts set up on your Nexus 7, you may want to disable them. When you have multiple user accounts set up, apps on other user accounts are syncing data in the background — so if you have three user accounts, three different Gmail accounts will be syncing in the background at once. It’s no surprise that this can slow things down on the Nexus 7′s older hardware.
4 Android 4.2.2
If u ever upgraded to android 4.2.2 and felt there is some lag and found no other way 2 fix it dont hesitate to downgrade to 4.1.2 (I have done this as 4.1.2 feels a lot more faster than 4.2.2 for me.)
5-Run TRIM (LagFix or ForeverGone)
Due to a bug with the driver for the Nexus 7′s internal Samsung NAND storage, Android on the Nexus 7 was not properly issuing TRIM commands to clear unused sectors. This caused write speeds to slow down dramatically. This was fixed in Android 4.1.2, and Android should now properly be issuing TRIM commands to the internal storage.
However, this update does nothing to fix existing sectors that should have been TRIMMed in the past, but were not. To do this yourself, you can try the LagFix app from Google Play AND this will will fix the problem.Link-
https://play.google.com/store/apps/details?id=com.grilledmonkey.lagfix
6 My personal best recomendation
Use the AVG Memory & Cache Cleaner app. link- https://play.google.com/store/apps/details?id=com.avg.cleaner
After clearing the cache with this app my nexus 7 runs like new .Also try Advanced Task Killer, might help a bit.link- https://play.google.com/store/apps/details?id=com.rechild.advancedtaskkiller
Please press the thanks button :good: if this helped you!

6 - don't use too many widgets, they run in the background and can slow down your tablet too
Sent from XDA app

Task killers are pretty debatable. Android is designed in a way that means task killers can actually decrease battery life and slow the device down in some situations.
Sent from my Nexus 7 using XDA Premium HD app

The first few are common-sense solutions that demonstrably work on most devices.
The task manager and memory cache suggestions are snake oil and should be avoided. There is almost no evidence that demonstrates that any of these apps actually improve performance, and there's a lot that suggests they actually impede both performance and battery life. A task killer/memory cleaner sweeps through the system, looks for things not running in the foreground, and kills them. Sounds simple enough, right?
That is, until you realize that these programs can't prevent the apps they just killed from being triggered, and often cannot distinguish between benign apps that have legitimate background services and programs you don't want running. It then unloads them from memory (because free RAM is always good, right? Wrong), which generally results in I/O thrashing as the system tries to reload the killed applications and sees them killed again. And that ties up I/O operations, which have never been the Nexus 7's strong point.
And mind you, starting an activity is one of the most memory-intensive processes in Android, whereas keeping an app in a dormant state has significantly less impact on the system. Multitasking works better to boot, and battery life is better because the system doesn't have to waste resources regenerating resources over and over and over again.
As of this writing, the only real "performance boosting" apps I have seen are Lagfix and Greenify, because they go in at the system level (requiring root access) and actually make the right changes. Greenify temporarily "freezes" an app similar to the Disable option (or Titanium Backup) until it's in use, but unlike a task killer, it also shuts down any self-triggers an app might have to avoid thrashing. If you open the app, Greenify defrosts the app immediately for a minimal performance hit, then freezes it again after you haven't used it for a while.
Lagfix is an implementation of fstrim, which helps keep the internal memory running more smoothly. It's particularly useful on the Nexus 7 owing to the generally poor I/O performance of the internal NAND flash.

1) Install custom ROM
2) Install custom kernel
3) Overclock your CPU
4) Change CPU Governor to performance
5) Change Tegra 3 CPU Quiet Governor to Userspace
6) Setup ZRAM
7) ???
8) Profit

Username invalid said:
1) Install custom ROM
2) Install custom kernel
3) Overclock your CPU
4) Change CPU Governor to performance
5) Change Tegra 3 CPU Quiet Governor to Userspace
6) Setup ZRAM
7) ???
8) Profit
Click to expand...
Click to collapse
9) Come on XDA and complain about battery life.
Sent from my Nexus 7 using Tapatalk HD

veeman said:
9) Come on XDA and complain about battery life.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
The more energy efficient ROM, kernel and undervolting would compensate for the higher clock speed voltage.

Username invalid said:
The more energy efficient ROM, kernel and undervolting would compensate for the higher clock speed voltage.
Click to expand...
Click to collapse
And the one step that users who would do 9) always mess up will invariably muck things up/they'll have bad sync settings and moot the whole process.

veeman said:
9) Come on XDA and complain about battery life.
Click to expand...
Click to collapse
Yep. Performance governor? Derp. This whole thread is derp.

Try many different ROMs with many different kernels, find the best match, and be happy with it
On another note, keep away from Gapps. They are a real issue, take about 50 mb on my phone, an the first thing I nuked after rooting. Beleive me, my HTC Sense forgot bein laggy after that. This implies to most devices. Every ROM that I have used, has been devoid of Gapps.

Use F2FS ported to nexus 7 by legolas
Sent from my Nexus 7 using Tapatalk

Another tip: apps may open faster with row io scheduler (prioritized read speed) in custom kernel.
Sent from my iPhone using Tapatalk

Amisuta said:
Another tip: apps may open faster with row io scheduler (prioritized read speed) in custom kernel.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
which rom will you choose for better performance
omni or slimkat

nat510 said:
which rom will you choose for better performance
omni or slimkat
Click to expand...
Click to collapse
I haven't used omni or the normal slimkat before, but I've used the all-f2fs version, which works great.

nat510 said:
which rom will you choose for better performance
omni or slimkat
Click to expand...
Click to collapse
Omni worked much better for me. Also benchmarks are much much higher.
Sent from my Nexus 7 using Tapatalk

467) isn't there 45 000 000 other threads just like this?

Thank you :good:

Good tips.
I personally use ROW and performance governor with no overclocking and my tab runs super smooth.

Thanks.
Although Android 4.3 solved the issue with NAND Trimming.

T-Keith said:
Omni worked much better for me. Also benchmarks are much much higher.
Sent from my Nexus 7 using Tapatalk
Click to expand...
Click to collapse
Year, Omni is awesome

[Q] ROM with much RAM free

Hello,
I'm looking for a good ICS ROM with much RAM memory free.
I know there are many good ones like RocketRom, but the RAM is priority for me, as I use a lot off apps and I don't want them to get killed every time I exit them.
The ROM may be stock based (best) or even some other type.
Do You know some You could recommend?
PS. They don't have to be fast as hell.
Admin please don't close this thread.

try bulletproofing them and freezing/removing unwanted apps.
Also try to set autostarts off for apps you only want to run on request as well as proper exiting them to prevent running ram.
granted its android that should optimize ram usage which is why amount of free ram shouldnt impact, but yet it does.
maybe you have set dont keep activities to on development settings if so, disable it. lol.
Other tweaking can be done with minfree and oom levels to lower values, stock however they are pretty low.
last random thing I can come up with is less memory footprint apps. Alternatives for ones you are using. Lol. Goodluck!
Sent from my GT-N7000 using Tapatalk 2

baz77 said:
try bulletproofing them and freezing/removing unwanted apps.
Also try to set autostarts off for apps you only want to run on request as well as proper exiting them to prevent running ram.
granted its android that should optimize ram usage which is why amount of free ram shouldnt impact, but yet it does.
maybe you have set dont keep activities to on development settings if so, disable it. lol.
Other tweaking can be done with minfree and oom levels to lower values, stock however they are pretty low.
last random thing I can come up with is less memory footprint apps. Alternatives for ones you are using. Lol. Goodluck!
Sent from my GT-N7000 using Tapatalk 2
Click to expand...
Click to collapse
I have used about 170 apps on my SGS2, now I've reduced them to about 120. I have also deleted some system apps, but the problem is android OS.
Killing apps is disabled for 100%, it's just due to 70MB memory free. The launcher is killing almost every time I turn on some other app (build.prop edit didn't stop it from closing).
Android just uses too much RAM. Fresh ROM uses 400+ MB, that's so much.
That's why I'm looking for some ROM that uses max.300MB. Are there any?
I wish I could have ROM from my xpiera x10, which used max 120MB hehe

jakuburban said:
Hello,
I'm looking for a good ICS ROM with much RAM memory free.
I know there are many good ones like RocketRom, but the RAM is priority for me, as I use a lot off apps and I don't want them to get killed every time I exit them.
The ROM may be stock based (best) or even some other type.
Do You know some You could recommend?
PS. They don't have to be fast as hell.
Admin please don't close this thread.
Click to expand...
Click to collapse
These type of threads are not allowed....as the best is up to the individual to figure out, what is best for me, may not be best for you....