Questions tagged [performance]

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

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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
455 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
69 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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1answer
120 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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2answers
2k views

NTFS with high CPU usage

I'm using a RPi B+ with XBian and transmission, and an external USB 2TB disk, which has an external power supply. That disk is NTFS, and I've noticed that the CPU usage of the mount-ntfs process is ...
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47 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
59 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
23 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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1answer
214 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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10answers
4k views

Can the original StarCraft be played on LAN with a Raspberry Pi?

Update! StarCraft has been ported to ARM: Reddit discussion Hacker News discussion Geek.com article Download: http://repo.openpandora.org/?page=detail&app=package.starcraft So, I've unaccepted ...
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0answers
103 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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1answer
314 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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4answers
3k views

Does Raspberry Pi runs Minecraft and Netbeans 7.2?

I have a computer with 512MB of RAM Memory, CPU Intel Celeron 1.60GHz and a 80GB HD. After the new Minecraft update to 1.3.X, Minecraft don't run on my computer any more even on Windows XP and Lubuntu ...
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1answer
62 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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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 ...
4
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1answer
931 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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0answers
43 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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0answers
57 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 ...
6
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1answer
792 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 ...
3
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0answers
149 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? ...
2
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2answers
2k views

What is the performance and the performance per watt of Raspberry Pi 3 in GFLOPS

What is the performance of Raspberry Pi 3 in GFLOPS if the CPU is running at 100% and that the GPU is not running at all?
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6answers
46k views

How can I stress test my Raspberry Pi

I recently picked up a battery powered USB cell phone charger and I'm running some tests to see what kind of battery life I will get. Right now I'm just testing at Idle. I want to also run a test ...
2
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1answer
2k views

Performance with an encrypted disk

Is Raspberry Pi (model B, rev. 2) suitable for a home file server with external disks encrypted with LUKS? In particular, is the de/encryption throughput reasonable? I used to have such a disk in a ...
2
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1answer
44 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, ...
3
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1answer
150 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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3answers
630 views

How Viable is an RPI Laptop?

I've been seriously looking into making one of the Raspberry Pi Laptops that have been floating around using the Motorola Atrix Lapdock solution found here and here. The whole reason for doing this ...
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0answers
35 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 ...
3
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2answers
2k views

How much connection speed can I except using Pi 3 in this setup?

I bought the following product to get good internet in my room: AWUS036ACH 802.11ac AC1200 Wide Range USB 3.0 Wireless Adapter with External Antenna I'm planning to buy a Pi 3 to use this wireless ...
2
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2answers
187 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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0answers
85 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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3answers
3k views

When does the OS kill an application?

I have an application which polls a bunch of servers every few minutes. To do this, it spawns one thread per server to poll (15 servers) and writes back the data to an object, however sometimes the ...
0
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1answer
64 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 ...
3
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4answers
24k views

RPi extremely slow download speed

I am trying to set up my Raspberry Pi as a small home server, and I am having issues with my download speed. My Windows PC is getting up to 6mb/s, the Raspberry Pi is doing a dist-upgrade, and is ...
18
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8answers
36k views

Is Pi powerful enough for an oscilloscope project?

My goal is to make Pi based instruments, starting with an oscilloscope. So I read answers to What Analog to Digital Converters Are Available For RPI? How can I connect an analog to digital converter ...
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3answers
3k views

Expected User Limit of IRC Server on Pi 512 MB?

Does anyone have a clue of the maximum number of users RPi 512 MB could handle if running an IRC server? I'm just looking for an approximate number, is it 100, 10'000 or millions?
2
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0answers
866 views

Is RaspberryPi OpenCV fast enough to run eye blink recognition?

I would like to create application that can recognise eye blink recognition on RaspberryPi with Raspberry Pi Noir camera. Eye blinks are fast, so I will have to process many frames per second. Is ...
28
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6answers
26k views

What is a typical boot time for the standard Debian distribution on a typical SD card?

How long does the RasPi take to boot when using the standard Debian distribution on a typical SD card? Are we talking less than a second? A couple of seconds? 10 seconds? 100 seconds? This isn't too ...
0
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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 ...
4
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3answers
13k views

The Hashrate of the Raspberry Pi 2 and 3

I've been searching for a definitive answer to the above question, but somehow only seem to find semi-true statements (according to replies to these statements), or very outdated answers (for example ...
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2answers
381 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 ...
2
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2answers
615 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 ...
0
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1answer
560 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, ...
1
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1answer
505 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 ...
1
vote
1answer
272 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 ...
0
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1answer
66 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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5answers
20k views

Raspbian is very sluggish. Almost unusable

This is my first time posting in this forum. I have the Model B board 512mb version, a class 4 16gb SDHD. I bought my Raspberry Pi yesterday and tried to load Arch Linux with no avail. I am a fairly ...
0
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0answers
731 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 ...
18
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8answers
49k views

Will a Raspberry Pi perform well with XBMC and many movies?

I have a library with more than 1000 movies and I'm searching for a cheap but good performance media centre system. I've been using a Xtreamer Prodigy until now but it's firmware's a little slow (...
5
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2answers
9k views

How the usage of ZRam module in Raspberry Pi Kernel improves performance?

zRam increases performance by avoiding paging on disk and instead uses a compressed block device in RAM in which paging takes place until it is necessary to use the swap space on the hard disk drive ...
12
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5answers
31k views

How to change the default governor?

I want to change the default governor on my pi from ondemand to performance. Is there a way of doing this?