[Interest] Memory consumption when starting QML application

[Nils Jeisecke]

Hi!

I don't think this is a general problem.

I've seen this behaviour when for example using a repeater on a filter
model. If initially no filter is set, the repeater will happily
instantiate delegates for every model item. Those will then be
destroyed as soon as the filter becomes active, which can happen due
to late property binding.

Maybe you could check your code for such situations.

Nils

On Sun, Sep 4, 2016 at 8:39 AM, Marco Trapanese
<marcotrapanese at gmail.com> wrote:
> I have a QML application which often hangs during launch. I found the GPU
> memory usage has a very high peak when my application starts. Then it
> returns to a reasonable value.
> If this "peak" is so high to use all the available memory my application (of
> course!) hangs.
>
> This is a known behavior of QML engine or there should be a serious lack in
> my application?
>
> For examaple below are some readings: it starts with 100% free, then drops
> down to 5 MB (sometimes goes to 0!) and it says there is an "invalid space".
> Finally comes back to 470 MB free and it will be stable.
>
>
> Relocatable heap version 4 found at 0x13400000
> total space allocated is 680M, with 680M relocatable, 0 legacy and 0 offline
> 0 legacy blocks of size 2359296
>
> free list at 0x3b79c880
> 644M free memory in 6 free block(s)
> largest free block is 625M bytes
>
> 0x13400000: free 668M
> -------------------------------------------------------------------------------
> Relocatable heap version 4 found at 0x13400000
> total space allocated is 680M, with 678M relocatable, 2.3M legacy and 0
> offline
> 1 legacy blocks of size 2359296
>
> free list at 0x3b79c880
> invalid space 0x3579139583 in free list at 0x382eef20
> 5.2M free memory in 5 free block(s)
> largest free block is 4.5M bytes
> -------------------------------------------------------------------------------
>
> Relocatable heap version 4 found at 0x13400000
> total space allocated is 680M, with 678M relocatable, 2.3M legacy and 0
> offline
> 1 legacy blocks of size 2359296
>
> free list at 0x3b79c880
> 476M free memory in 17 free block(s)
> largest free block is 473M bytes
>
> 0x13400000: legacy block 2.3M
>
> Relocatable heap version 4 found at 0x13400000
> total space allocated is 680M, with 678M relocatable, 2.3M legacy and 0
> offline
> 1 legacy blocks of size 2359296
>
> free list at 0x3b79c880
> 472M free memory in 49 free block(s)
> largest free block is 468M bytes
>
>
>
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