Develop Bugs

"ReadyBoost" for Android?

Hello,
Why isnt it possible to use SDCRAM as sort of RAM in android? same as VISA/7 Using ReadyBoost to expand the ram with an USB disk on keys?
thanks!

Why would you want that?

since you only use flash based memory anyway: that's called swaping

And is Swap enabled in all froyo roms today?

rommark said:
And is Swap enabled in all froyo roms today?
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But why would you need it? You have 512MB of RAM, with a clean boot you have around 200-220MB of it free for whatever you want to do with it. Not enough for you?

martino2k6 said:
But why would you need it? You have 512MB of RAM, with a clean boot you have around 200-220MB of it free for whatever you want to do with it. Not enough for you?
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won't heavy 3d games eat that?

rommark said:
won't heavy 3d games eat that?
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No. Smartphones =/= PCs. And if you are really out of space for a short amount of time, unneeded processes get killed automatically. Swap was only really needed on the G1 but definitely not on the Desire.

rommark said:
won't heavy 3d games eat that?
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Click to collapse
No, that's a bit too much even for a game... unless the code has memory leaks. With so much RAM it'd make more sense to use ramdisk (but who knows for what good use)

martino2k6 said:
No, that's a bit too much even for a game... unless the code has memory leaks. With so much RAM it'd make more sense to use ramdisk (but who knows for what good use)
Click to expand...
Click to collapse
RamDisk could be insane for 3d gaming as then the textures would have fast extraction means less delay in rendering....

What Readyboost is NOT
Hey folks. I've only recently discovered Readyboost as I'm primarily a Linux guy. I got all hot and bothered about it immediately as well as it is (despite Microsofts constant onslaught of horrific failures) an absolutely brilliant and elegant technology/idea.
HOWEVER!!!
Nearly everyone is confused about what RB actually does, so I thought I'd take a minute to explain.
ReadyBoost is NOT swap. NOT SWAP!, not swap.
Swap is not something to get excited about, it is a last resort for when you're out of RAM and it's excruciatingly slow. In the land of IT, one of the first things we check for when a server is experiencing horrible performance, is "IS THIS MACHINE SWAPPING". Everyone's gotta learn that swap, while it is more useful than "not enough memory" it is nor more useful than utilizing the memory you already have, and it will always result in poor performance.
ReadyBoost is an additional disc cache for small, non-sequential reads/writes. It works with your existing FS cache but is faster in some cases because FLASH has a much lower seek time. Most FLASH chips have a seek time of <1ms while most rotational discs have a seek time of around 8ms. This adds up on a large number of small non-sequential r/w.
ReadyBoost takes any caching operations which fit it's strength profile (small, non-sequential) and offloads them to your FLASH device. This can increase load speed of some files/application dramatically (2-20x faster).
So, when someone asks you if they can use Readyboost because they don't have enough memory, please, take a moment to explain that RB is not swap, but is in fact a supplementary disc cache for small, non-sequential reads and writes.
That said, I haven't had time to dig into the question of whether or not RB would benefit Linux FS's.

I know this is a really old thread but I just wanted to put my two cents in. Memory boosting apps like ReadyBoost do have a viable purpose. That is keeping older hardware viable as minimum specs increase. There is an Android app that is equivilant to ReadyBoost called Roehsoft RAM Expander. There are mixed reviews for its performance but that is to be expected. If this app helps my aging 8227_Demo head unit work well enough for me to not replace it I will update this post.

RFS filesystem

Hello I had read about the problem of stalling. In the OCLF thread, I read that this is due to the RFS used.
BTW anyone can verify if this is still the problem in Android 2.2 build.
Thanks.
Sent from my GT-I9000 using XDA App

dplate07 said:
Hello I had read about the problem of stalling. In the OCLF thread, I read that this is due to the RFS used.
BTW anyone can verify if this is still the problem in Android 2.2 build.
Thanks.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
Still rfs in the leaked froyo builds; no one can verify what the official build will be like, because it hasn't been released yet.

Seems pretty unlikely that samsung would consider a change in fs for the i9000 at this stage in it's development. I think manufacturers like to stick to their own proprietary fs...

This is the 1st and the last time I purchase a Samsung Phone Android, no matter what we do, still crapy slow. I start to hate this phone.... Android is cool but I9000 phone have the best hardware but the software suck....

halabibk said:
I start to hate this phone.... Android is cool but I9000 phone have the best hardware but the software suck....
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No device is perfect. Most problems are fixable, I think. If Samsung doesn't do it, I'm sure the talented developers in this forum will do something - that's the beauty of Android..

the voodoo kernel puts the phone to rights. with that fix, its the fastest thing on the market.
it's just a shame only a small minority of users will see the benefit and the phone will ultimately fail because of this.
are you reading this samsung?

chrissyg123 said:
the voodoo kernel puts the phone to rights. with that fix, its the fastest thing on the market.
it's just a shame only a small minority of users will see the benefit and the phone will ultimately fail because of this.
are you reading this samsung?
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Hi, may I know what is the voodoo kernel? Can you please provide us with a link to the forum. Cheers.

chrissyg123 said:
the voodoo kernel puts the phone to rights. with that fix, its the fastest thing on the market.
it's just a shame only a small minority of users will see the benefit and the phone will ultimately fail because of this.
are you reading this samsung?
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Click to collapse
I'm sorry to say that even the voodoo kernel starts to lag after a while. I don't know whats wrong with this phone but I'm never ever buying Samsung again, no matter how nice the specs are.

cavinsoo said:
Hi, may I know what is the voodoo kernel? Can you please provide us with a link to the forum. Cheers.
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public beta 2 should come online within short time

f samsung...this is the first time in my years and years of using a mobile phone that i have to learn about filesystems and mobile phones.....lol

Disagree
kmrdeva said:
No device is perfect. Most problems are fixable, I think. If Samsung doesn't do it, I'm sure the talented developers in this forum will do something - that's the beauty of Android..
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Click to collapse
True that no device is perfect, but for the money we pay to purchase such a device, we expect a product that works out-of-the-box, which is not the case for the Galaxy S.
Compared to the hardware Samsung put into it, its shockingly laggy and other phones in the market with half the hardware specs dont show such lag due to the tweaked software they have
A mobile phone is not just a piece of hardware, its the hardware with its software that enables the optimum use of the hardware and also the accompanying PC software where Samsung has yet failed through the horribel "Kies"
I am a big fan of android, but Samsung has tarnished android through this ****ty product
This will be clearly seen once a pure android 2.2 OS (with no samsung software on top) is available for the SGS with the proper file system and memory manager

There are 2 problems with the phone.
1. File System
2. Memory
File system can be fix by using lag fix. After you implement lag fix, you feel phone is snappy and fast and you start running and install tons of apps.
This started the 2nd problem, even though is 512MB ram, most you get is 200Meg usable, however with some background service it reduces to 130 on average. After few hours of apps used or longer time the available memory can drop down to 30Meg. This is when you feel the 2nd lag. Even with 80Meg ram available you will still feel lag, and swype start behaving funny.
This can only be solve or temp fix (some people say you shouldn't) if you use softwares like ATK, SystemPanel Apps. (Just KILL THEM ALL) when you feel your phone start to slow down and your phone will than be alive!!!
The real fix for the memory issue.. unfortunately.. i believe we need a phone with minimum 6 to 700MB free RAM. Than you should feel the phone responsive all the time until all the apps start clogging up the usable RAM.

I understand where you're coming from, regarding this. However, being somewhat of a tech freak, I am quite happy that so many tweaks have been developed by the experts here in this forum - my Galaxy S works well enough for me, rooted and sped up with the one-click-lagfix app.
My experience so far with Android on the Galaxy S (shortcomings and all) has generally been way better than my previous experiences with S60v5 on the Nokia 5800 and N97.

kmrdeva said:
I understand where you're coming from, regarding this. However, being somewhat of a tech freak, I am quite happy that so many tweaks have been developed by the experts here in this forum - my Galaxy S works well enough for me, rooted and sped up with the one-click-lagfix app.
My experience so far with Android on the Galaxy S (shortcomings and all) has generally been way better than my previous experiences with S60v5 on the Nokia 5800 and N97.
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Click to collapse
I am so so so so so so AGREE WITH YOU!!!!
Maybe that's why we appreciate the problems that comes with Android and SGS.

xtrememorph said:
There are 2 problems with the phone.
1. File System
2. Memory
File system can be fix by using lag fix. After you implement lag fix, you feel phone is snappy and fast and you start running and install tons of apps.
This started the 2nd problem, even though is 512MB ram, most you get is 200Meg usable, however with some background service it reduces to 130 on average. After few hours of apps used or longer time the available memory can drop down to 30Meg. This is when you feel the 2nd lag. Even with 80Meg ram available you will still feel lag, and swype start behaving funny.
This can only be solve or temp fix (some people say you shouldn't) if you use softwares like ATK, SystemPanel Apps. (Just KILL THEM ALL) when you feel your phone start to slow down and your phone will than be alive!!!
The real fix for the memory issue.. unfortunately.. i believe we need a phone with minimum 6 to 700MB free RAM. Than you should feel the phone responsive all the time until all the apps start clogging up the usable RAM.
Click to expand...
Click to collapse
I haven't had these problems for a long time, actually using a taskkiller makes it slower for me. Since JM* it's not possible anymore to have only 30Megs free as the least low memory killer level starts at around 40 Megs which turns into having 50ish free all the time. The only time i get lags is when installing apps but otherwise never with loads of apps installed. I use the oneclick lagfix btw.

The filesystem choice is not wise from samsung, the hardware and software interaction are because samsung is using Hummingbird processor and that google developed android to improve it on snapdragon because the nexus one is running it and most of the andro phones. So samsung has to "fix" android for their processor.
For the memory "issues" like I said on another topic
http://geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/
Linux however isn’t generally affected by this. While I admit that I don’t know the architecture and reason for this… linux will run the same regardless of if you have 20mb free memory or 200mb.
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Freeing more ram on Galaxy S

Hypothesis:
The memory for this device is contiguous with memory holes. This holes are for DMA for front/back camera, video decoding/encoding, etc. In 99.99% of time this is wasted memory.
Proposal:
Why not allocating all ram and dynamically allocating memory for DMA only when needed?
For example this could be like this:
1.The phone boots and the mm allocates all memory but lies the driver for camera that he could use a portion of ram for DMA
2.The system use normally all memory (maybe allocating last the reserved memory)
3.The user starts the camera
4.A hook in camera's driver instruct the mm that he needs the reserved memory
5.The MM frees a portion of ram(other than the one needed by the camera and equal with that) and moves everything from the reserved memory in that
6.The MM updates it's maps(virtual memory ↔ real memory)
7.The camera uses normally in DMA the reserved memory
8.The user closes the camera, the camera driver notifies the MM that he doesn't need memory anymore
9.The MM allocates normally the reserved memory
Pros: You'll have like 50% more ram in user space
Cons: Some lag when starting camera
I'm ready to start implementing this but I don't have lots of experience with the linux's mm and I don't really know if this is possible so I'm asking:
How crazy this idea is and it could be implemented? And if yes, how hard?

WOW! Your the first to suggest it. After everybody else here on forum, that is.

dupel said:
WOW! Your the first to suggest it. After everybody else here on forum, that is.
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Yes, I know, the idea is not revolutionary or smth ) but I'm ready to try to implement it...
So please respond only if you can provide some useful information.

Not sure anyone really knows how easy it is to do for sure, but it has been mentioned a few times (but sounds like you have done it in further detail).
Personally, I've always believed that it's something which Samsung is working on, but maybe not. Could be awesome if you managed to make it work reliably.

Check out Hardcore's Speedmod kernel here in the development section.
His kernel gives you 341 RAM instead of the default 304. Might give you some ideas.

I know this isn't a bounty thread, but I would be willing to donate $20 if you could get this working. I wouldn't mind a slightly delay when launcher camera. I'd much rather have more free RAM.

andars05 said:
I know this isn't a bounty thread, but I would be willing to donate $20 if you could get this working. I wouldn't mind a slightly delay when launcher camera. I'd much rather have more free RAM.
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I seriously think Samsung messed up a very good phone by allotting ONLY 512 MB ram. With 16/8 GB at their disposal, they could have easily allotted at least 1 gb

ragin said:
I seriously think Samsung messed up a very good phone by allotting ONLY 512 MB ram. With 16/8 GB at their disposal, they could have easily allotted at least 1 gb
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+1 here!
I have the 16GB version so I wish Sammy gave this version at least 2GB RAM and 1 GB ROM

android.francis said:
+1 here!
I have the 16GB version so I wish Sammy gave this version at least 2GB RAM and 1 GB ROM
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Can any developer DO THIS?
Seems simple. I think you need hack the pit file.

hi . . .
I dont want to be rude, but seeing these comments I couldn't stop myself -
Dudes, if you dont know what you are talking about STFU!!!
Seriously?? Allocate more to RAM from 16/8 GB??????? And edit the PIT file for this???? I am assuming that you all would've used computers, are you allocating more to RAM from the free space in your Hard Disk?? What you are suggesting is the same!!!
Please think for a moment before you post stuff.
And to the original query regarding how hard this would be - it would be pretty hard. You will have to touch upon everything that uses and reserves RAM. And this would also include modifying firmware of individual components on the phone. And if there are parts in this for which Samsung has not released source code, it would be very difficult. Not to say that - you could end up damaging the phone.
Good thoughts - but it would need a lot of work to get going.
Cheerios!!

Actually, using a swap partition on flash isn't that bad an idea, they are low latency. It would be pretty slow compared to physical ram though
Sent from my GT-I9000 using XDA App

coooolboyz said:
hi . . .
I dont want to be rude, but seeing these comments I couldn't stop myself -
Dudes, if you dont know what you are talking about STFU!!!
Seriously?? Allocate more to RAM from 16/8 GB??????? And edit the PIT file for this???? I am assuming that you all would've used computers, are you allocating more to RAM from the free space in your Hard Disk?? What you are suggesting is the same!!!
Please think for a moment before you post stuff.
And to the original query regarding how hard this would be - it would be pretty hard. You will have to touch upon everything that uses and reserves RAM. And this would also include modifying firmware of individual components on the phone. And if there are parts in this for which Samsung has not released source code, it would be very difficult. Not to say that - you could end up damaging the phone.
Good thoughts - but it would need a lot of work to get going.
Cheerios!!
Click to expand...
Click to collapse
My response: VIRTUAL RAM. And yes, I think before I post. My response was more of wishful thinking. So as an added response: ANALYZE and comprehend BEFORE you react. And I orginally was not suppose to reply but similar to you, I JUST COULDN'T STOP MYSELF
Now as for the topic of more RAM, I said before to check out Hardcore's SPEEDMOD KERNEL. It is fully functional and your RAM goes from 304MB to 341MB. Yes, it is hard but Hardcore already did it.

Advance users help with crossbreeder

Anyone can explain this
http://forum.xda-developers.com/showthread.php?t=2113150
Globally recognized N00B

alkesh95 said:
Anyone can explain this
http://forum.xda-developers.com/showthread.php?t=2113150
Globally recognized N00B
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Its just scripts used to speed up your UI. Similar to supercharged scripts that used to float around a while back.
Waste of time if you ask me. I don't understand how someone could want their phone to be faster when everything already happens in the blink of an eye!
My old Moto Atrix would probably see improvements with this. But I don't think it would do much to our ZL's, if anything at all.

alkesh95 said:
Anyone can explain this
http://forum.xda-developers.com/showthread.php?t=2113150
Globally recognized N00B
Click to expand...
Click to collapse
it is similar to pure performace script of my thread

I have used supercharger on my galaxy y
I got improved performance only a little n ram consumption reduced total ram was 290mb
Now I always have 900-1200mb free ram I am confused how to fill it up
Thread officially closed
Globally recognized N00B

[Q] G3 - Dalvik vs. ART, opinions/results?

Just what it says, now that these are in the wild has anyone tried ART yet, and is it worth it or are you sticking with Dalvik?

Please search next time a thread about art has been created. Next time post this in questions http://forum.xda-developers.com/showthread.php?t=2810770
Sent from my Nexus 5 using XDA Premium 4 mobile app

I am curious how much extra storage space is taken. I have read anywhere from 20% to 30%.
To me that is not worth it if true.

rushless said:
I am curious how much extra storage space is taken. I have read anywhere from 20% to 30%.
To me that is not worth it if true.
Click to expand...
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My remaining storage went from 7gb to 5.5gb about 23% when I changed from dalvik to art.

Sucks IMO since not seeing the advantage over losing the space. I prefer storage over a tiny technical improvement in performance. I would however notice the storage loss.

hopefully the new nexus will have an sd slot

bulldog2000 said:
hopefully the new nexus will have an sd slot
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It won't. Google doesn't believe in SD cards.

First day on ART today and battery is awesome!

Will this fix ram usage?
Sent from my LG-D855 using Tapatalk

Seifer1975 said:
First day on ART today and battery is awesome!
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I agree

hi.
be careful!
it seems the use of ART is directly related to bluetooth problems
http://forum.xda-developers.com/lg-g3/help/bluetooth-audio-stutter-t2810220

rushless said:
Sucks IMO since not seeing the advantage over losing the space. I prefer storage over a tiny technical improvement in performance. I would however notice the storage loss.
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Click to collapse
I hope you don't plan on updating to Android L then. They removed Dalvik entirely so you'll lose the storage space if you update. Android L ART is different than KitKat ART though, so maybe the performance increase will be worth it to you by then

Please use this thread to continue discussion: http://forum.xda-developers.com/lg-g3/help/switching-to-art-improves-performance-t2810770
Closed