Questions tagged [memory-split]

On the Raspberry Pi the CPU (central processing unit) and the GPU (graphics processing unit) share the same RAM. memory-split describes at what ratio the RAM is allocated for the CPU vs GPU.

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Pi 3B addressable physical memory

Using valgrind, I have found a program (written by co-worker) receives a bus error: Non-existent physical address at address 0x4859008 This had me wondering how physical memory was mapped. I read ...
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Pi 3 Model B+ can't boot after changing vRAM

I just got the device (Pi 3 Model B+) and am a total beginner. I'm using NOOB/Raspbian. Every time I try to change the video ram (either through the GUI or the config.txt) the device is unable to ...
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1answer
171 views

Does gpu memory affect video processing speeds using openCV or image array manipulations?

I am using my pi for video processing. The data transformations include image array manipulations and object detection. It does not include any video display. Essentially, the pi takes in a video ...
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1answer
4k views

Unable to set GPU memory split on Raspberry Pi Zero W

I have looked everywhere (both on and off StackExchange) for this but cannot get an answer: I have a Raspberry Pi Zero W, which has 512MB of RAM total. I am running it headless, so I want to ...
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0answers
385 views

How to force GPU memory to 0 on a headless server [duplicate]

Is there any way to force the shared memory to 0? I'm running Jessie on a pi3 (and a pi2 and a few zero-w's) as a headless server and only ever access it via SSH or a WebUI for certain services. I ...
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1answer
1k views

Extra 16M memory on Pi2/Pi3

My 1 GiB RAM Pi shows this: >vcgencmd get_mem gpu gpu=128M >vcgencmd get_mem arm arm=880M The former is specified in /boot/config.txt, but the total here is only 1008 MiB. What happened to ...
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2answers
261 views

python slideshow runs out of memory

I'm working on a small project to turn an old Raspberry Pi model A into a photo frame. I'm using slideshow.py. The script starts to run, shows the 1st photo and when transitioning to the 2nd photo it ...
13
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3answers
8k views

Raspberry Pi 3 has less than 1GB memory available at OS level

I don't know if it is a critical issue or not. But, I need to get rid of the question marks in my mind. I recently purchased a Raspberry Pi 3 board and while I was playing with it, I realized that ...
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1answer
18k views

Raspberry PI 3 Increase Gpu Memory to 944 [closed]

I use Raspberry PI 3 and wnat to get more GPU memory to work. I overclock my PI to get more performance because I use it for home Apache/PHP/MySQL server, Access Point and somethimes play music and ...
2
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0answers
417 views

Understanding the memory map in QA7 document on the official website

The description of the first row says "GPU access". That looks confusing. Isn't the memory split for CPU and GPU usage? From most other sources the peripheral base is 0x3f000000. Why does it say ...
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1answer
109 views

Why does audio playback seem to depend on GPU memory?

I encountered a really odd behaviour with my Raspberry Pi B+, running a slightly modified version of Raspbian with a PiTFT screen from Adafruit. Because the screen cannot access the GPU I dialed down ...
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1answer
184 views

Optimum memory split for a RasPi 2 streaming movies

What's the optimum memory split for a Raspberry Pi 2 with 1 GB of RAM streaming movies.
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0answers
2k views

Fixing comxaudio decode timeout

On omxplayer, if I play a file, it often works the first time, then if I press q and play it again, I get COMXAudio::Decode timeout This apparently has to do with insufficient memory being allocated ...
3
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1answer
847 views

Memory split - How much is the GPU responsible for?

I am using my Pi2 to run some Python scripts that are heavily use the CSI camera (being pulled with the picamera module), being processed with OpenCV, and draw a GUI to screen (using the PyGame module)...
2
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1answer
571 views

What's the smallest amount of memory that can be allocated to GPU?

According to http://elinux.org/RPiconfig#Memory , the minimum that can be specified in /boot/config.txt is 16MB. Is there a way to shut off video completely and allocate nothing? I'm asking about ...
11
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6answers
64k views

Raspberry pi 2 1024M Increase Gpu Memory to 512 at least

I have a Raspberry B and a Raspberry 2. In the B model, I set the config file to gpu_mem_512=256 in order to get more memory for the graphics. It works fine. If I type the command vcgencmd get_mem ...
2
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1answer
1k views

Optimal gpu_mem_512 split for headless server

I own a Raspberry PI model B with 512MB of RAM. I am not running any graphical application on it. It just run a few services and when I need to administer it I do that via SSH. I see that my /boot/...
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0answers
233 views

Usage of graphics core for headless XRDP server

I run my Pi as a headless server, running (among others) XRDP. My question is this: does XRDP use the video core and RAM? If not what is the lowest possible memory split?