Use for questions about the Broadcom SoC (BCM2835/BCM2836) Graphics Processing Unit.

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1answer
33 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 ...
1
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1answer
108 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 ...
5
votes
1answer
47 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 ...
1
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0answers
42 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 ...
4
votes
1answer
640 views

Using GPU to decode QRCODE

I'm using a raspberry pi compute module and my question is : Can we use the GPU to decode QRCODE ? I am using my own function inspired by the one from QRTOOLS and by doing so the timing is divided by ...
1
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1answer
114 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 ...
5
votes
1answer
72 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 ...
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4answers
229 views

How to connect a graphic card to Raspberry pi?

I want a way to connect a graphic card like nvidia or amd to raspberry pi do you think has a way to do that?
7
votes
1answer
913 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 ...
3
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1answer
47 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.
3
votes
1answer
195 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 ...
3
votes
1answer
293 views

How do I read the GPU temperature in C?

I am making a graph on the temperature using a NTC resistor and also by reading the CPU temperature, however I'd also like to read the GPU temperature. I read this answer explaining briefly how to ...
2
votes
0answers
95 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
184 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?
3
votes
1answer
152 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 ...
0
votes
0answers
14 views

OpenCL via External GPU on RPI [duplicate]

The subject of my question is pretty self-explanatory, I would like to drive my external GPU via OpenCL with Raspberry Pi (it would be great if potentially multiple devices were supported), I don't ...
1
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0answers
127 views

VideoCore IV capable encoder or running 2 raspivid processes concurrently [closed]

I have B+ and can stream using raspivid. load average: 0.08, 0.04, 0.09 So load is low and I wish to run 2 streams at different resolutions and bitrates. I could run ffmpeg to transcode but as I ...
5
votes
2answers
926 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
votes
2answers
4k 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 ...
0
votes
1answer
86 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 ...
9
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5answers
24k 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
votes
1answer
213 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?
3
votes
1answer
3k views

Hardware-accelerated h264 encoding possible?

The Raspberry Pi will do hardware accelerated h264 encoding when recording video from the camera board. How can I encode h264 (using hardware acceleration) when the source images are not coming ...
4
votes
1answer
505 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: ...
0
votes
1answer
723 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 ...
8
votes
3answers
6k 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 ...
4
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1answer
1k 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 ...
1
vote
2answers
648 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 ...
12
votes
6answers
19k views

Connect a GPU into Raspberry pi

I want to connect a GPU GT640 to a Raspberry pi model B. I know there is not a direct connection and the tranfer data are very differents but. Is there any chance to connect this devices in order to ...
10
votes
1answer
4k views

Can a Pi be used as an OpenCL CPU device?

Can I use a Pi (or, for that matter, Beagle Bone or Arduino) as an OpenCL CPU device? I understand there isn't much of a GPGPU thing on a Pi, but couldn't I link a bunch together under an OpenCL ...
4
votes
1answer
2k 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?
1
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0answers
1k views

OpenGL ES (EGL) without a window [closed]

I'm trying to build a small application that does some image processing. Currently I'm using OpenCV which is a bit slow. This is why I'm thinking to use OpenGL and shaders instead (see this example). ...
3
votes
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
2k 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 ...
5
votes
2answers
2k views

Voice recognition

I was thinking about creating a kind of Jarvis computer (Iron man). Only then a (little) bit more minimalistic. What I want to built is more of a question/answer type of application (something like ...
0
votes
1answer
323 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 ...
9
votes
2answers
4k 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 - ...
12
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4answers
45k views

Get CPU and GPU usage on Raspberry Pi

I am trying to figure out a good split for the CPU/GPU. Is there a way to monitor the CPU and GPU usage to see where I should make the split?
4
votes
1answer
3k 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
votes
3answers
17k views

What speed can I expect from the hardware-H264-encoding?

I stumbled over the Wikipedia-article that the Broadcom GPU has hardware support for encoding H.264/AVC, not only de-coding. I also found an article where someone gave an example using ffmpeg to ...
10
votes
2answers
14k 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 ...
20
votes
3answers
13k views

How can I change the RAM split?

By default, the Pi is set to a 192MiB:64MiB RAM:VRAM split. As I will not be using the pi for graphical purposes, I would like to change the split to allocate more normal ram to ease swap usage.
58
votes
2answers
84k views

What is the optimum split of main versus GPU memory?

I read that it's possible to allocate either 128MB, 64MB or 32MB to the Raspberry Pi's video memory. Given that my primary use case for this machine is educational: I will be running lightweight ...
15
votes
3answers
1k views

Is it possible to mine Bitcoins?

Obviously, the RPi can be used to mine Bitcoins on the CPU, but this would be very slow. Is it possible to use the GPU to mine Bitcoins?
15
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1answer
6k 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 ...
41
votes
5answers
13k views

Is there a GPU accelerated Xorg server?

At present all of the official builds of the X Window System run on the CPU, which takes up a lot of processing power and runs X rather slowly. I know there's no official GPU accelerated version of ...
82
votes
6answers
18k views

Can I use the GPU for calculations?

Is it possible to use the GPU for calculations? (e.g. CUDA/OpenCL)