Raspberry Pi

Questions tagged [performance]

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Questions about software, hardware or network performance. Please use as a supplement for other, more specific tags.

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Network speed problem on Raspberry Pi 3

Both my desktop (running Windows Subsystem for Linux) and raspberry pi 3 connect to router via WiFi. Download speed from internet on desktop is decent : ~/tmp$ wget https://cdimage.debian.org/debian-...
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71 views

Does this flat plate even work for cooling?

I bought a raspberry pi 4 case, and it came with these plates you see in the picture + a fan. From the sizes, I guess the flat plat is for the CPU. I kind of find it hard to believe that this works at ...
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26 views

How to power RPi with fan from single source?

Electronics beginner here. I have Raspberry Pi 4 GB variant. I have the following power requirements: power a 5V cooling fan 12V cooling fan (a spare cooler master)thanks @Milliways safely (i.e. ...
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1answer
156 views

External SSD-Drive very slow when using mounted encrypted container

I have a Raspberry Pi4 (4GB) with a 250GB SSD connected via USB3. The SSD has a write speed of about 70MB/s, which is very nice. The SSD is mounted via fstab and the following settings: LABEL=DATA /...
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28 views

Why does raspistill take 10× more real time than the shutter time I set?

I've installed the camera module v2.1, and now I'm trying to make long-exposure photos with it. I seem to get correct results, i.e. the image is bright enough corresponding to the large exposure time, ...
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125 views

UV4L huge CPU load on streaming audio

I'm building a little baby monitor using RaspberryPi ZeroW and UV4L and run into a little problem. I'm using WebRTC to cast video and audio to my browser from RPI camera (used facedetect demo, ...
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1answer
78 views

Raspberry Pi 4 Low Voltage performance

I am looking what exactly happens when a Raspberry Pi 4 is powered with low voltage. I am not looking whether this will hurt the Raspberry (as this has been asked before) or how to fix this. I ...
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1answer
25 views

Raspberry pi 3 A+ [closed]

The Raspberry Pi 3 A+ ,I think is memory-constrained,in that Chromium does not work well. I wanted to code Scratch 3 on it as Scratch 2 is only available offline. Using the web seems off limits and so ...
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172 views

Why does Pi 3 have better WebGL than Pi 4?

Based on https://webglsamples.org/fishtank/fishtank.html Pi 3B, Raspbian Buster, GL driver on, Chromium reports 18 FPS. Pi 4B4, Raspbian Buster, GL driver on, Chromium reports 12 FPS. Any idea why ...
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59 views

Raspberry pi 3 B+ Disk IO Bottleneck

I have a RP3 with several docker containers (11) running at home, some for network purposes, other for IoT. The thing is, I've notice several issues related to disk IO, specially when performing unzip ...
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67 views

How fast is ffmpeg in converting .mkv files to hls format on the Raspberry pi 4?

For my current project, I need to convert Mkv files to hls using ffmpeg on my Rasberry pi 3b+, but the speed is of course relatively slow (The speed is 0,25x to 0,3x or around 6.0 - 6.9 fps). The ...
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312 views

Performance of Raspberry Pi 4 in luks?

I found previous version was quite slow (3MB/s), but this newer Pi has more power. What speeds can I expect with external hdd and standard installation of luks (I believe aes 256, xts, plain 64)?
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69 views

How many blocks can a RPi 2B load per day as a Bitcoin full node?

My Raspi 2B is running a full node over a >20MBit/s internet provider (I subtracted another) and it seems that it only loads about 6 blocks a day which would amount to about 1GB per day. Is it ...
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1answer
602 views

What sort of throughput is achievabe over the USB 3.0 port on the Pi-4?

Looking to run a router application on the rPi-4, and was wondering if anyone has experience using usb 3.0 -> gigabit ethernet adapters on it - specifically what adapter/chipset worked with what ...
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1answer
56 views

Unusably slow performance on Model B Revision 2.0 using latest Raspbian kernel - advice?

I finally decided to try out a RBP that was given to me years ago. It's a Pi 1 Model B Revision 2.0 (PCB 2011.12). I installed and set up the latest Raspian kernel using NOOBS, no problem. However, ...
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243 views

Cost-effectiveness of Pi cluster

Does it make sense to use Pi cluster for real computation? My use case is to carry out intensive computation tasks 24/7. The tasks are pleasantly parallel, and there will be minimum inter-node ...
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38 views

will it Pi? headless home server(s)

I want to run the following: Transmission Sickrage Plex (no transcoding) Openvpn (client) Now for the multiple choice section. Raise your hand to vote: Each in a separate Docker container on a ...
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2answers
204 views

Would ZRAM be helpful for running OpenCV?

I'm doing some OpenCV development on a Raspberry Pi 3, and I have found some information about using ZRAM on the Pi to try and boost its processing effectiveness. I know this isn't actually adding ...
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1answer
482 views

Raspberry Pi 3 Model B+ vs Odroid C2 huge performance difference

So i benchmarked my Raspi 3 B+ and an Odroid C2 with sysbench by in single and multithread operation by using sysbench --test=cpu --cpu-max-prime=20000 --num-threads=4 run The results are kinda ...
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1answer
145 views

Strange performance problems

I've been trying out a raspi 3 as a desktop recently, and have run into strange performance problems, particularly when using chrome. setup: raspberry pi 3 running raspbian stretch 2.5A power supply ...
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98 views

“Performance” gorvernor doesn't change cpu frequency

When i tried to change the default governor of my Raspberry Pi 2 (currently at Powersave mode) to Performance mode which is expected to push my Pi's CPU freq up to its maximum number (900Mhz) by using ...
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1answer
1k views

Lxpanel using 100% CPU (1 core)

On my Raspbian 2018-11-13 installation with all updates (sudo apt-get update and sudo apt-get upgrade), I see the CPU graph in the task bar (top right corner) at constant 25%. I opened a terminal and ...
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1answer
71 views

Is a Raspberry Pi 3 B+ “usable” enough for our coding/development, entertainment, gaming needs?

I'm planning on buying 2 units. One for myself for the purposes of learning web development, and one for my sister for entertainment purposes. I know that the latest iteration of the device will ...
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1answer
1k views

Raspberry PI 3 - Browser, bad performance (Website with HTML5 canvas)

I have encountered a problem while developing a dashboard which is supposed to run on a Raspberry Pi 3. It is a combination of a HTML5 canvas as background to create visuals and some simple elements ...
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2answers
403 views

.NET CORE 2.1 app added to Linux(ARM) deamon cause CPU high

I'm using RaspberryPi (3B+) Linux ARM IOT board which OS is Debian Stretch 9, and my console application is developed on .NET CORE 2.1. My application is quite simple by just open several TCP ...
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2answers
697 views

Pi3B+ automatically shutdown while the temperature is less than 65C

I'm using Raspbian Stretch with desktop which published at 2018 JUNE. I'm doing some performance testing with Pi3B+ by running my application, the application is just keep send/write data via TCP/IP ...
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3answers
1k views

Increase CPU for raspberry pi 3b+

I am running a Bitcoin Full Node on Raspberry pi 3b+. Blockchain sync is dead slow because of less CPU. Is there a way to add additional CPU to a pi board. or connecting additional pi to the same Hard ...
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1answer
71 views

Raspberry Pi dnsmasq performance

I want to block ads in my whole network with dnsmasq running on a Raspberry Pi, connected via Ethernet to the router. Is there any reason to take a RPi3? Or is a RPi2 also sufficient for that task?
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859 views

What could I do to optimize rendering time of image with tkinter?

I've been working on a project using Python 2.7 and TKinter which needs to render 25 images per second based on GPIO inputs. I have working code on my Ubuntu laptop, which is able to render an image ...
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1answer
274 views

Embed UI App in Windows IoT

I developed a foreground app (UI app) for RPI3 on windows IoT core (version 1709: Fall creators update). also I made my app as start-up app. I want to access the app immediately after turning the ...
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1answer
1k views

Data transfer of UART over USB too slow

TL;DR : The PI was not the issue. The sender was. Take a look into my answer. long story I am facing a performance issue right now on a test setup i use to investigate limitations for my upcoming ...
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2answers
140 views

CPU speed changes by a multiply of 2 for short durations

I'm using a raspberry pi and I need really fast performance from my CPU for a certain process. To achieve that, I added isolcpus=3 to my kernel boot parameters, to isolate the core for this process ...
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1answer
294 views

RPi Cluster for Materials Research

I'm Materials Science student interested in using an RPi cluster for calculations of materials properties. I'm very new to HPC but what I know about the RPI is that its processor is based on the ARM ...
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1answer
607 views

Interfacing pygame with dispmanx - performance

I'm working on a graphical application, made for console mode, and facing some performance issues when working with large resolution (1920px wide here). One part of the display, a video background, ...
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1answer
523 views

Raspberry-Pi vs Router as a home data server

I'm planning to build a home server, just to setup a file sharing (hooked up to an external HDD) and a torrent daemon. Between a Raspberry Pi and an older Tp-Link WR1043ND Router, which would have ...
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39 views

Can I use Rasp Pi 3 to detect objects from live streaming videos?

I am doing a project on UAV(Unmanned Autonomous Vehicle) for which I need to detect objects from live streaming videos. Can Raspberry Pi 3 satisfy my needs? Also how is Nvidia Jetson compared to Pi 3? ...
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152 views

Can a Raspberry Pi 3 play videos from Ustream?

I am thinking about purchasing a Raspberry Pi 3 to stream video from Ustream in a web browser. Is a Pi 3 running Raspbian capable of doing this without choppy video? Does it have the necessary codecs? ...
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83 views

Diagnosing Pi slowness?

How do you diagnose slow computing time issues on the Pi? I have Ubuntu 16.04 installed on a Raspberry Pi 3. All Ubuntu package updates are installed, and I've installed the most recent Pi firmware. ...
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1answer
135 views

Very Low Wi-Fi Performance

I've got a problem, i realized that my Wi-Fi connection on RaspberryPI 3 its very slow (that's not normal) I installed speedtest-cli to test speed of internet. And this is the result: Download: ...
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1answer
3k views

Raspberry pi 3 over all slow performance [closed]

I am a Raspberry pi enthusiast and novice in this space. I recently bought my first Raspberry pi 3 with 32 GB SD Card and 1 GB RAM. I find over all it is very slow. My atom (android) is much faster ...
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1answer
837 views

Raspberry Pi Reverse Proxy Performance

I currently have a Nextcloud server on a Raspberry Pi 3, which works perfectly fine. In addition I want to setup my Raspberry 2 as a Gitlab Server. I also have an unused Raspberry Pi 1 Model B+, ...
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2answers
63 views

What motor controller to use for this setup?

I'd like to run two unipolar stepper motors at 6V 1.2A each and two geared dc motors at 9W 1.2A each simultaneously on the same motor controller. What options are there for this particular setup, and ...
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64 views

Hardware platform for building a simple always-on pc

I am considering building a simple Kiosk PC (no keyboard or mouse, only touchscreen). I have a spare 22" touchscreen with HDMI, DVI and VGA outputs and a USB output for touchscreen. I want to use ...
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1answer
332 views

Perfornance communicating through local loopback

I have a Client/Server application where the Server runs on one rpi and communicates with a client running on another rpi. They communicate using Tcp Sockets. I'm going to do a spin-off application ...
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1answer
1k views

Is there a way to log CPU load?

I need to examine how my CPU is performing. I could simply open the task manager, but I will have to sit in front of the monitor long time. My problem is that CPU seems to be spiking or overloading ...
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1answer
887 views

Latency for Raspberry Pi installed on USB drive

I recently bought a Raspberry Pi 3 model B (the last release of the Raspberry foundation), and after reading a lot of articles on the Web for SD card vs USB performances, I decided to move all the ...
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1answer
1k views

Object detection by color [closed]

I just started planning a project including the raspberry pi . I have experience in programming but never used a pi before. In my project I want to do object detection by color. I need to classify the ...
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2answers
330 views

Switching from 128 to 512GB USB storage drive makes computer unusably slow

I run Bitcoin on my raspberry pi 3. I have been storing the blockchain on a 128 GB USB SSD drive: https://www.amazon.com/MyDigitalSSD-SuperSpeed-Portable-External-Storage/dp/B00N0V4JG2 The ...
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1answer
345 views

Is it a good choice to implement IoT Server using Raspberry Pi 3 [closed]

For Arduino (MQTT Client): Light Sensor, Light, etc. For Raspberry Pi 3: Node.js server (with AngularJS front end), MQTT Broker, MongoDB Will the Raspberry Pi 3 Overload? or use Raspberry Pi 3 as ...
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1k views

How to Tell if Too Many Threads Are Crashing My Multithreaded Python Program?

How can I tell if my multithreaded Python program is crashing on my Pi 3 because there are too many threads? (Or poorly written ones?) My multithreaded program involves three looping threads: a main ...

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