I'm not sure why, and neither is this person, though I have had this error on one of my RPi's "ImportError: libf77blas.so.3: cannot open shared object file: No such file or directory". If you're running a distro that is going to demand endurance, then check out our passive and active cooling cases (they cost more, though are designed to have better heat management). The Official Case is stylish and great value for everyday computing. But it can happen, and for some people, it's a certainty. Orange = CPU clock speed (1500Mhz = max)Įxtended full-load processing for 30+ minutes isn't a "usual" thing for most Raspberry Pi's.After 20 minutes, the CPU was throttled down a whopping 30% (to 1000Mhz) and at 30 minutes it was bouncing off 750Mhz (50% performance reduction). Official RPi Case - after 10 minutes of full-load, the CPU was clearly in for trouble.An interesting compromise that appears to be keeping the CPU well below the 85✬ over-temperature zone. Bare board - the CPU is doing it's best to deal with the generated heat and appears to be bouncing between 600Mhz and 1.5Ghz sporadically.The room temperature at the time was about 21✬. I ran the above commands on a bare Raspberry Pi 4, and again when inside an Official Case. (-not-transparent) = make image background opaque.(-l 400 1600) = frequency min/max limits.(mytest.out) = file name of the source data.When complete, a PNG image can be generated using this command (assuming you are still in ~\TemperatureTests): MPLBACKEND=Agg /home/pi/.local/bin/stressberry-plot mytest.out -f -d 300 -f -l 400 1600 -t 30 90 -o mytest.png -hide-legend -not-transparent -line-width 2 (mytest.out) = the filename for the collected data.(-i 300) = 5-minute idle periods before and after.(-n "My Test") = test name, which is used later when plotting.That's why I've added the directory ~/TemperatureTests to ensure there are no surprises for unfamiliar people. Important - the generated file will be in the current working directory. home/pi/.local/bin/stressberry-run -n "My Test" -d 1800 -i 300 -c 4 mytest.out Use this command to begin the test (it takes about 30-minutes to complete!): I recommend creating a folder in the home directory as you'll collect a few files and images as time goes by: mkdir ~/TemperatureTests You ought to see these types of messages after each command: Now to install Stressberry: sudo apt install stress Open the Terminal on the Raspberry Pi and first update your RPi (this method will also update your major release version): sudo apt update While I've been experimenting with their repo more than the original, I'll keep this guide on-point for the official package (so it ought to work for you exactly the same). The original Github repo is well maintained, however, I discovered a fork that had more features developed by Github user shortbloke. Like all makers, I searched the Internet for existing methods and stumbled upon Stressberry. It's only for those people who are using the Raspberry Pi for heavy lifting, such as: View the CPU speed (to witness if the CPU is being governed, or not)īefore you get started - this guide doesn't apply to everyone.A stabilization period at the beginning.The goal of this guide is to create a chart like this, which depicts: A quick stress test, in this case, will reveal if your Raspberry Pi 4 can run at full CPU-load in it's case/environment without overheating and not slowing down. ![]() The RPi 3B+ and predecessors could also overheat, however, it was less of a problem for the majority of use cases. This results with the CPU being governed (slowed down) to reduce the electrical energy being consumed, and in turn, reducing heat generation. USB Cable Type A to Micro B (1m) Price: $2.40ġ0k Slide Potentiometer - (Long Shaft) Price: $6.55įirst of all, why subject your Raspberry Pi to this level of stress? In the case of Raspberry Pi 4, the A72 CPU is so powerful that it can overheat if it doesn't have enough cooling. Raspberry Pi Pico W with Soldered Male Headers Price: $14.95 PiicoDev OLED Display Module (128圆4) SSD1306 Price: $13.20
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