Questions tagged [gpu]

Use for questions about the Broadcom VideoCore IV Graphics Processing Unit included in all Raspberry Pis.

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2answers
4k views

Why does the Raspberry Pi's GPU control the first stages of the boot process?

According to the answers to this question and other sources, the GPU of the Raspberry Pi's BCM2835 SoC is responsible for the first stages of the boot process, including enabling the ARM CPU. Until ...
-2
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1answer
19k 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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1answer
13k views

Pi 3 GPU overclocking ability

As far as I am aware the Pi 3's CPU is currently not overclockable, its maximum clock speed is set at 1.2GHz. But what about overclocking the GPU? Is it even possible? And would I see performance ...
4
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1answer
195 views

Is there way get the GPU-load average per second?

I am interested to get the GPU-load average over, for example, an interval of one second. Alas, I was unable to find a direct way to get this information with the current API or tools ( vcgdb or ...
2
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1answer
1k views

300 MHz (3D core) / 400 MHz (VideoCore IV) difference?

For the Raspberry Pi 3 it's mentioned here that the GPU has a 400 MHz (VideoCore IV subsystem) part and/or a 300 MHz (3D core) part. BCM2837 runs most of the VideoCore IV subsystem at 400MHz and ...
3
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1answer
369 views

How do I view gpu / h.264 block usage?

Normaly I can get this infromation from psensor but on the pi the only monitors i have access to are cpu and ram usage.
1
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1answer
2k views

Temperature differences between CPU & GPU

So recently I was interested in CPU and GPU temperatures and did some work displaying the temperatures in real time on a page and also recording the temperatures on a graph using rrdtool (which is ...
6
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1answer
156 views

GPU Unified Memory?

Is it possible to access the memory the GPU is allocated on the CPU? For instance if I'm running a 3d application and I wish to edit a lookup table which is in a texture, is it possible to access the ...
8
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1answer
2k views

Differences of Raspberry Pi models in GPU computation?

I know the publication Biosignal PI, an Affordable Open-Source ECG and Respiration Measurement System which uses Raspberry Pi A+ / B+ as a component isolated by ADums, since RP is not itself a medical ...
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1answer
260 views

Applications that can utilize raspberry pi 2 Model B's GPU

Are there raspbian compatible applications that can utilize the GPU of the Raspberry PI other than omxplayer?
15
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3answers
15k views

OpenCL w/ Broadcom GPU?

I know this question has been asked and answered before here: Can I use the GPU for calculations? but there have been a number of developments recently, including a hint that there will be more ...
12
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2answers
6k views

OpenCL / GPGPU programming coming soon?

Last June the answer was a qualified no: Can I use the GPU for calculations? However, the Videocore driver code was open sourced towards the end of 2012: http://www.raspberrypi.org/archives/2221 - ...
3
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1answer
1k views

How to display a GPU surface on a afafruit TFT screen?

I'm playing with a PiTFT Plus display on a Raspberry Pi 2 using the Adafruit modified version of Raspian Jessie for this screen. The display looks ok for most things, but I'd like to play a video ...
2
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2answers
6k views

How to get the most out of the raspberry pi 2 GPU?

I just purchased the raspberry pi 2 and I was trying to use it to make my "non-smart" TV a bit smarter. Basically, instead of connecting my laptop (via HDMI) to the TV every time I wanted to watch ...
2
votes
0answers
399 views

Maximise GPU usage on a headless Raspberry Pi

I have a headless Raspberry Pi 2 model B and my goal is to maximise the heat output from the CPU/GPU IC. I've successfully maxed the 4-core CPU by running 4 instances of: yes > /dev/null & ...
0
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1answer
2k views

RaspiCam use GPU to stream h.264 video over TCP

Is there a way to stream the 1080 30p video from the RaspiCam over TCP to use it as surveillance camera in common software? In my case I'm searching for the possibility to stream to my Xeoma server ...
3
votes
1answer
871 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)...
5
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2answers
1k views

Persistent rainbow test pattern

I've got an install of arch linux on my B+, but the test pattern is showing in the upper-right corner of the screen even well after the OS is fully booted. It disappears every now and then, but comes ...
2
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1answer
614 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 ...
5
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1answer
1k views

How to achieve gpu_mem=8?

I see some people claiming (see links) they have a memory splitting of gpu_mem=8, but I always thought 16/496 is the minimum split? Here is an answer on this very page: https://raspberrypi....
2
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1answer
271 views

Can we now use the DSI cnnector?

Now that the GPU source has been made open source, will we be able to use the DSI connector to power display panels?
2
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2answers
991 views

What is the most optimum memory split for streaming pi's as security monitors which you will only ssh into?

I have a few model A's and model B's. I've also read about a few options that allow you to configure an arbitrary split apart from the 16, 32, 64, 128 (and 256 for the B). Any insight would be ...
13
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2answers
23k views

VLC Hardware acceleration

I'm new to Raspberry Pi. I am trying to develop a media player that would use a library like libvlc to do the decoding. Now the problem is that I can't get the hardware acceleration going... I have ...
4
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1answer
3k views

Is it possible to do GPU-accelerated tasks on a raspberry pi?

I have been looking into doing some cluster computing on several raspberry pis. Is it possible to use any kind of GPU acceleration on a pi?
3
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4answers
3k views

GPGPU simple example

I am programming ARM assembly on raspberry and I am wondering whether and how it is possible to access GPU. I already looked userland repo, but I completely do not understand the stucture. I would ...
2
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2answers
4k views

How is memory split by CMA?

The post at http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=19334&p=218282&hilit=cma#p217665 mentions that:- gpu_mem_512=316 cma_lwm=16 cma_hwm=32 In the above ARM has 96M always. ...
0
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1answer
391 views

How to allocate GPU processing power to accelerate internet speed?

From my question about the Pi's slow internet I learned that the main bottleneck is the dismal CPU speed. Is it possible for me to use the GPU to handle the information instead (or perhaps in addition ...
4
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1answer
5k views

How to: build a graphics cluster

Currently, I am waiting for my second RPi to arrive and then I will begin my fun building a RPi cluster. Also, later I want to extend it more and more. =) I am building it at home, home-experiment, ...
16
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1answer
8k views

Running 1080p video from within XOrg smoothly

The 1080p examples that work outside of X.Org run very smoothly on my Pi, but within X.Org they don't run very smoothly at all at the moment. Given that X.Org is currently not GPU-accelerated, this ...