What is max size of Stack in S60 3 rd addition?

[bnvaikos]

hello,

i m developing application for E61. I have to deal with upto 1MB data in my app.
i m using stack size 80 mb. this much is not sufficient. Can any body tell me how much stack size one can able to use in S60 3 rd add.?
Or any other solution for this?

[wizard_hu_]

Although I do not know how much memory an E61 has, but that 80 MB stack sounds really bad to me. Re-think what you are doing.

[petrib]

Yes. It is also worth remembering that Symbian does not support paging/swapping, so the maximum amount of RAM that can be used by a process is whatever amount of physical RAM is free after the devices has booted up.

On a battery powered devices with limited memory (for run-time and storage), and limited processing power, being frugal with all of them (use of power, memory and CPU cycles) is advisable.

It is also good to keep in mind that the user might want to run other apps than your app, too.

[bnvaikos]

mistake..
it is 80kb. my app works well 4/5 times then it crashes.
i m testing it on same amount of data.
why this happening ?
is it because of some memo has not been freed? alloc error

[Skygyl]

Do you mean HEAP size or STACK size?

80 kb stack size is big, actually the default value is only 8kb, so for large amount of data,always put them in HEAP instead of stack.

For the crash, you need to narrow down which line of codes crash.

[olhed]

Sounds like you are either haveing some heavily recursive functions, or allocate large buffers on the stack.

Both are bad ideas in symbian.

[bnvaikos]

Do you mean HEAP size or STACK size?

80 kb stack size is big, actually the default value is only 8kb, so for large amount of data,always put them in HEAP instead of stack.

For the crash, you need to narrow down which line of codes crash.

i mean stack size.
when i allocated HBufC of 1MB & then trying to process it ,i got error for my app as Myapp full in memory space. it won't allow me to exit from app or to click on menu item it just displays the error.
to find out particular line for crash i need File explorer sothat i would write down log mesg in file & will find out location of crash.

do u know wher i get File explorer for e61?

[bnvaikos]

Sounds like you are either haveing some heavily recursive functions, or allocate large buffers on the stack.

Both are bad ideas in symbian.

yes i m using loop & Rarray.
but same code will work fine on S60 II nd addition ,uiq.
it sometimes crashes in that loop.
to free memo i m using Close() method of RArray is that OK?

[Skygyl]

HBufC allocates memory to heap, you need to check your heap memory, not stack.

You can write your logs to memory card, and view it at pc.


for file explorer, I remember www.newlc.com has 3rd edition one.

[bnvaikos]

HBufC allocates memory to heap, you need to check your heap memory, not stack.

You can write your logs to memory card, and view it at pc.


for file explorer, I remember www.newlc.com has 3rd edition one.

thanks
i will do that.