Develop Bugs

372mb RAM instead of 512?

I tried searching for this one and couldn't come up with any good answers on here, but it's something that I've been wondering since I got the G2. I've noticed that no matter what rom I use, the total memory in settings>about phone never shows up more than 400mb. I can't be sure of the exact amount for all the roms I've tried in the past, but I remember thinking it peculiar, although thinking about the internal memory and the fact that it was advertised as 4gb and only registers as 1.2gb, I was thinking maybe this is a similar thing?
Sent from my G2 running GingerMex Ghost Chili

Gwanatu said:
I tried searching for this one and couldn't come up with any good answers on here, but it's something that I've been wondering since I got the G2. I've noticed that no matter what rom I use, the total memory in settings>about phone never shows up more than 400mb. I can't be sure of the exact amount for all the roms I've tried in the past, but I remember thinking it peculiar, although thinking about the internal memory and the fact that it was advertised as 4gb and only registers as 1.2gb, I was thinking maybe this is a similar thing?
Sent from my G2 running GingerMex Ghost Chili
Click to expand...
Click to collapse
Get a better phone, this is normal.

Get a good one damnit
meXdroid Ghost Chilli

The rest is used up by the operating system.
Sent from my HTC Vision using XDA Premium App

Normal. My mt4g never shows more than 500mb after a fresh reboot.
Sent from prison

tackleberry said:
Normal. My mt4g never shows more than 500mb after a fresh reboot.
Sent from prison
Click to expand...
Click to collapse
That's normal to..
Look at this example
You buy a computer for 400 and in order to play crysis you need to have 2000 total dollars.
The 400 is for the computer, 50 of that is for crysis and the remaining 1550 is used to increase your computers everything just to freaking play that graphic hog game..
Okay better example
You eat a twinkie, it looks good at first, the commercial urges you to buy it. Even the box makes it look good, but once you eat it you realize your stomach hurts and it was a waste of time buying something that is so fattening you wish you hadn't.. bloatware much?

Read the details here HTC Vision XDA wiki

melodicjunkie said:
That's normal to..
Look at this example
You buy a computer for 400 and in order to play crysis you need to have 2000 total dollars.
The 400 is for the computer, 50 of that is for crysis and the remaining 1550 is used to increase your computers everything just to freaking play that graphic hog game..
Okay better example
You eat a twinkie, it looks good at first, the commercial urges you to buy it. Even the box makes it look good, but once you eat it you realize your stomach hurts and it was a waste of time buying something that is so fattening you wish you hadn't.. bloatware much?
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what? how does this at all help anyone understand this.

martonikaj said:
what? how does this at all help anyone understand this.
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Click to collapse
i think he's just saying that the OS is using up the other resources
compare it with a sony PSP.. since it doesn't run a lot of programs in the background, it can play graphics intensive games with such low clocked cpu and less ram compared to mobile phones
BTW i know you are talking about the physical memory but just wanted to bring it out there
you can check the link given by Innocent Devil and check the "The Missing 2GB" part. it explains it there

krizz07 said:
BTW i know you are talking about the physical memory but just wanted to bring it out there
you can check the link given by Innocent Devil and check the "The Missing 2GB" part. it explains it there
Click to expand...
Click to collapse
This has *ABSOLUTELY NOTHING* to do with the "missing 2GB".
The question is about RAM, not storage.
Most relevant example;
You buy a new computer with an integrated video adapter. You go into the BIOS configuration program and it has an option to change the amount of RAM being allocated to the GPU -- 64 MB, 128 MB, 256 MB, or 512 MB. You have 4 GB total and set the GPU to 512 MB. When you boot into your operating system, you only see 3.5 GB. Where is the missing 0.5 GB? Its allocated to the GPU.
In addition to allocating a whole bunch to the GPU, these phones are actually TWO COMPUTERS (with two separate CPUs) that run two different operating systems concurrently. The first one is the RADIO system, responsible for messing with the wireless. The second one is the APPLICATION system, which runs the user operating system and interface (Android). They share a common pool of RAM, so some of it is allocated to the RADIO, some is allocated to the GPU (and other media components), and only what remains is available to Android.

Thanks for those of you that gave me good answers! This clears things right up!
dhkr234 said:
This has *ABSOLUTELY NOTHING* to do with the "missing 2GB".
The question is about RAM, not storage.
Most relevant example;
You buy a new computer with an integrated video adapter. You go into the BIOS configuration program and it has an option to change the amount of RAM being allocated to the GPU -- 64 MB, 128 MB, 256 MB, or 512 MB. You have 4 GB total and set the GPU to 512 MB. When you boot into your operating system, you only see 3.5 GB. Where is the missing 0.5 GB? Its allocated to the GPU.
In addition to allocating a whole bunch to the GPU, these phones are actually TWO COMPUTERS (with two separate CPUs) that run two different operating systems concurrently. The first one is the RADIO system, responsible for messing with the wireless. The second one is the APPLICATION system, which runs the user operating system and interface (Android). They share a common pool of RAM, so some of it is allocated to the RADIO, some is allocated to the GPU (and other media components), and only what remains is available to Android.
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Click to collapse
Very interesting, didn't know about the dual OS thing. Makes sense though, and I figured that was the case but just wanted a sure fire answer. Thanks a lot!!

dhkr234 said:
This has *ABSOLUTELY NOTHING* to do with the "missing 2GB".
The question is about RAM, not storage.
oopsie you're right.. i guess the PSP comparison is the one applicable then haha
he's absolutely right, the other ram is for the OS itself and the rest is for your other apps. this makes the phone silky smooth when running tasks unlike my touch pro 2 before, which has a very low ram plus all the "memory leakage" but it still has the best keyboard
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Only 477mb RAM?

I noticed my phone has only 477 MB of RAM, should not be 512?
I'm on CM7.2 12 feb nightly.

nothings ever a s much as it's quoted ^^
my SD for example is suppose to be 8GB... but it says 7.4GB
& why are chip packets only a third full!? :FFS:

Bleak3993 said:
I noticed my phone has only 477 MB of RAM, should not be 512?
I'm on CM7.2 12 feb nightly.
Click to expand...
Click to collapse
Some part of the ram is occupied by the Android Operating System..
so obviously it shows less than the actual RAM...

size is bluff
King_Rat said:
nothings ever a s much as it's quoted ^^
my SD for example is suppose to be 8GB... but it says 7.4GB
& why are chip packets only a third full!? :FFS:
Click to expand...
Click to collapse
this size difference is coz companies bluff with MB & GB values..while we consider 1M=1024K, 1K=1024 for digital devices, companies calculate with 1M=1000K, 1K=1000 units
ultimately when u have 8GB SD card you consider 8*1024*1024*1024 Bytes but actually its 8*1000*1000*1000 Bytes = 8000000000 Bytes
thus you get (((8000000000)/1024)/1024)/1024) = 7.45 GB

I think that some RAM is taken by the graphics chip, just like all the integrated graphics chips do when they don't have their own RAM
Just my thought, although I could totally be the one who's wrong
Cheers, you buddies

niksy+ said:
I think that some RAM is taken by the graphics chip, just like all the integrated graphics chips do when they don't have their own RAM
Just my thought, although I could totally be the one who's wrong
Cheers, you buddies
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Click to collapse
My thoughts precisely..

niksy+ said:
I think that some RAM is taken by the graphics chip, just like all the integrated graphics chips do when they don't have their own RAM
Just my thought, although I could totally be the one who's wrong
Cheers, you buddies
Click to expand...
Click to collapse
if you have GPU (defy has a powervx) don't needs memory from RAM.... is taken by OS (android).

i understand, thanks you, but some users post screenshots of they system info, and the ram shows exactly 512, the total ram obviously, not the used one.

512mb RAM?

How come the two values dont add to get 512?
Am i confusing it with something? :S
Im on stock rom .49

I think the remainder thats missing is used by the system and thus hidden from view. Kinda like an Xbox360 Hard Drive. Says 20Gb on the case but you only get 12Gb usable (I think)

Just got confused because.my brothers phone (lg optimus one) had so much more free ram than me, and he had more used ram than me too
Same size, 512mb

Jordanooo said:
How come the two values dont add to get 512?
Am i confusing it with something? :S
Im on stock rom .49
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Click to collapse
I think the other RAM is reserved for system use (ie, rild, surfaceflinger...)

GNex memory question

I just got my GNex the other day and loaded up CM10 nightly build. Everything working well but one question I have.
When I go into Settings > About Phone the Memory shows 693MB.
I thought the phone had 1GB of ram?
Just wondering if my phone has 1GB or ram or less.
thanks

tzmueller said:
I just got my GNex the other day and loaded up CM10 nightly build. Everything working well but one question I have.
When I go into Settings > About Phone the Memory shows 693MB.
I thought the phone had 1GB of ram?
Just wondering if my phone has 1GB or ram or less.
thanks
Click to expand...
Click to collapse
You've got 1GB RAM - some is dedicated to the OS though. Much like when you purchase a 16GB SD card, but only 14.XX is actually usable

aSquard said:
You've got 1GB RAM - some is dedicated to the OS though. Much like when you purchase a 16GB SD card, but only 14.XX is actually usable
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Well, the thing is, I have both the Galaxy Nexus and HTC One X running CM10 nightlies with bundled kernels, yet the Nexus has 693MB RAM available while the HOX has 0.95 GB... wondering how does that compute? Thanks...

feicipet said:
Well, the thing is, I have both the Galaxy Nexus and HTC One X running CM10 nightlies with bundled kernels, yet the Nexus has 693MB RAM available while the HOX has 0.95 GB... wondering how does that compute? Thanks...
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Click to collapse
Either the HTC One X is not displaying the amount of free RAM correctly, or it has more than 1024MB RAM.

[Q] How increase RAM in JB..??

Hi All
after upgarde from GB to JB (either LEAK / Official), JB seemed Slow. whether to change the partitions on a flash PIT file MB2 / 4 can increase the RAM capacity in JB.
I found a thread where we can change it by using the application PIT "PIT_Magic".
but I do not understand how its use. if anyone can to using it please share...
Thanks
Original Thread PIT MAGIC

rozyid said:
Hi All
after upgarde from GB to JB (either LEAK / Official), JB seemed Slow. whether to change the partitions on a flash PIT file MB2 / 4 can increase the RAM capacity in JB.
I found a thread where we can change it by using the application PIT "PIT_Magic".
but I do not understand how its use. if anyone can to using it please share...
Thanks
Original Thread PIT MAGIC
Click to expand...
Click to collapse
You cant do that!there is about 140MB unused ram in stock firmware. in order to increase ram and use full of it ,you sould have uncompiled kernel source and know android kernel programming and change it.
but always you can change your phone partition sizes through PIT Magic while falshing.

kernel source
sorset said:
You cant do that!there is about 140MB unused ram in stock firmware. in order to increase ram and use full of it ,you sould have uncompiled kernel source and know android kernel programming and change it.
but always you can change your phone partition sizes through PIT Magic while falshing.
Click to expand...
Click to collapse
Hi Sorset
maybe we can help to hafidzduddin to edit the kernel in order to read that we change the RAM to 1 GB .. ..

From where you flashing JB? From GB or JB XXMB4?

edit PIT to get 1gb RAM
ddikodroid said:
From where you flashing JB? From GB or JB XXMB4?
Click to expand...
Click to collapse
from JB MB4
i just Edit PIT FILE on MB4 to get RAM 1 GB, but I have not dared to try it..
I am still gathering information about the RAM partition address....

1 GB? ~768MB is enough for me. Though i really think that it can't go over 700+MB.

1 Gb? WTF?
Our device doesn't have true ram? I thought that we have some sort of LDDR2 ram and it's quite different from it's flash NAND.
I think you can't go over installed 768 mb and you can't even reach this number because gpu also use the same ram.
I hope Samsung didn't put the ram on storage because it will wear out like hell. NAND it's not fast, not even prone to multiple write cycles.
Even if you're successful in increasing you ram, you will make something like swap partition on linux. But I highly doubt it will work.
Swap system is not used on mobile devices because NAND wears up too fast.

According to this:
http://forum.xda-developers.com/showpost.php?p=35222874&postcount=14
...we do not have LDDR2. There is only 4GB chip named UME300 (IC-NAND Flash Memory, 4 GB, SDIN5D2-4G-944L, BGA, P/N: 1107-002091)
It may be true regarding memory size of ACE 2:
system 1,2 + USB 1,1 + 0,768 + spare for dead cells = 4GB
SIII Mini for example have 1GB RAM and I/O and RAM operations are much much faster. Also there are no 768MB LDDR2 chips on market. Using emmc as low speed LDDR2 substitute is quite common in Samsung devices.

arroyo said:
According to this:
http://forum.xda-developers.com/showpost.php?p=35222874&postcount=14
...we do not have LDDR2. There is only 4GB chip named UME300 (IC-NAND Flash Memory, 4 GB, SDIN5D2-4G-944L, BGA, P/N: 1107-002091)
It may be true regarding memory size of ACE 2:
system 1,2 + USB 1,1 + 0,768 + spare for dead cells = 4GB
SIII Mini for example have 1GB RAM and I/O and RAM operations are much much faster. Also there are no 768MB LDDR2 chips on market. Using emmc as low speed LDDR2 substitute is quite common in Samsung devices.
Click to expand...
Click to collapse
I thought this was a joke at first when rozyid said we can increase our RAM
so it was 601MB system + 302MB cache + 1,2GB data + 1,1GB usb = ~3,2GB
It will make sense if the remaining is our "RAM"
if somehow someone able to increase this by resizing other partition (/cache maybe?) it would be really nice
And btw, what is the function of /cache? When I checked it using link2sd it wasn't used
But hey, didn't we used another partition /preload in JB? If I'm not wrong it was about 200MB, right? So then it be more than 4GB if we add it to previous calculation
Sent from my GT-I8160 using xda app-developers app

[Noob] For example wont decreasing the RAM on the device increase the "ram" allocated to the GPU thus increasing our gaming performance in any way?

S3 mini RAM score is only 10% faster in antutu, either S3 mini doesn't have true RAM or our device has one.

I think you've added up incorrectly here. 4GB is usually 3.7gb total.
Also, if you looked in the PDF's from one of the links above, you would notice we do in fact have LP-DDR2 ram...

arroyo said:
According to this:
http://forum.xda-developers.com/showpost.php?p=35222874&postcount=14
...we do not have LDDR2. There is only 4GB chip named UME300 (IC-NAND Flash Memory, 4 GB, SDIN5D2-4G-944L, BGA, P/N: 1107-002091)
Click to expand...
Click to collapse
I was very confused when you wrote this. It's absolute non-sense to use NAND as RAM. It will wear in only one month.
They should have at least the most creepy ram, cache or something else that it can be re-writable.
You can have smooth gui with no RAM installed. It's impossible. You can't draw 20000 triangles per frame and having decent framerates without having a ram that it's capable of speed near 1 Gb/s ...
Also usually memory came in banks, 256 Mb banks were usual in the past, so puting 3 banks can give you 768 MB.

@Jamielawther
I would love that fact to be truth, but this diagram is not hardware schematic. It is logical diagram how things push data between elements. Move couple pages further and try to find element for LP-DDR2 on PCB. I did not found one. Also in document 05-GT-I8160-EPLIS-11.pdf you have the list of electrical parts. I did not found SEC Code for anything that could be LP-DDR2.
@veaceslaw
Take a look at PCB in 08-GT-I8160-TSHOO-7.pdf. There are no 3 ram chips there. In fact there is only one 4GB. If they used emmc as a RAM, it won't die in one month. Probably it last for 2 years or more ... after warranty it may die.
In my PC, SSD disk is used as TEMP and cache memory for last 2 years. Still running flawlessly. Every ROM chip has some space left for spare blocks to be used as a replacement for died blocks.

arroyo said:
@veaceslav
Take a look at PCB in 08-GT-I8160-TSHOO-7.pdf. There are no 3 ram chips there. In fact there is only one 4GB. If they used emmc as a RAM, it won't die in one month. Probably it last for 2 years or more ... after warranty it may die.
In my PC, SSD disk is used as TEMP and cache memory for last 2 years. Still running flawlessly. Every ROM chip has some space left for spare blocks to be used as a replacement for died blocks.
Click to expand...
Click to collapse
Can you find the U8500 chip?

veaceslav said:
Can you find the U8500 chip?
Click to expand...
Click to collapse
UCP300

arroyo said:
UCP300
Click to expand...
Click to collapse
http://forum.gsmhosting.com/vbb/archive/t-1363562.html
UCP 300 is RF chip and I don't know what rf is, but it's in GT i9100 and I don't think i9100 have Novathor

if you do it guys it would be awesome
because all good games with best graphics lags
i even dont want to get back to this ugly outdated gingerbread

arroyo said:
@Jamielawther
I would love that fact to be truth, but this diagram is not hardware schematic. It is logical diagram how things push data between elements. Move couple pages further and try to find element for LP-DDR2 on PCB. I did not found one. Also in document 05-GT-I8160-EPLIS-11.pdf you have the list of electrical parts. I did not found SEC Code for anything that could be LP-DDR2.
@veaceslaw
Take a look at PCB in 08-GT-I8160-TSHOO-7.pdf. There are no 3 ram chips there. In fact there is only one 4GB. If they used emmc as a RAM, it won't die in one month. Probably it last for 2 years or more ... after warranty it may die.
In my PC, SSD disk is used as TEMP and cache memory for last 2 years. Still running flawlessly. Every ROM chip has some space left for spare blocks to be used as a replacement for died blocks.
Click to expand...
Click to collapse
Anyone bothered to look through the documentation?
If you check 08-GT-I8160-TSHOO-7.pdf on the first page you can see the block diagram and there you can see stated LP-DDR2.
Check the attached picture.

If same chip is being used as RAM, then what is the benefit of moving data from on part of same memory to another? Won't that reduce io speed, cos I thought the purpose of RAM is to speed up data access for CPU from normally slower data storage eg. Hard drive.
Sent from my GT-I8160 using xda app-developers app