Then press 'ctrl o' to save, 'enter' to confirm and 'ctrl x' to exit back to the command line. This will open a text editor where you will then type: #!/bin/sh If in RetroPie, drop to the command line (F4) and type: nano /home/pi/RetroPie/retropiemenu/Check\ Temperature.sh You can try this and if you don't like it, I'll also include the command to delete it. You could do this by launching a script from a menu in Emulation Station that will list shell scripts, such as the RetroPie menu. When looking at performance statistics in vCenter Server, you see a decrease in CPU Usage.Wish there is a way to check the temp in emulation station. And there are other options for you to verify the reduced clock speed. In esxtop, you see a decrease in %USED, compared to %RUN and %UTIL, when the clock speed is reduced. Here are the final results of all tests combined: CPU LoadĪs you can see, thermal throttling works fine with the ESXi-Arm. The runtime increased to 868 seconds ( 30%) and the average bogo ops/s per CPU dropped to 290. It took only 2 minutes to run into thermal throttling and the CPU clock speed is decreased to 4.25 GHz, which is about 70% of the Raspis total performance. The last test runs with 4 CPU (100% load). The average bogo ops/s per CPU dropped from 385 to 375. The runtime increased from 652 to 669 seconds, which is an increase of 3%. With the temperature hitting 83☌, the clock speed is lowered and the temperature did not increase further. After 8 minutes into the test, the first signs of thermal throttling are visible. The third test runs with 3 CPU (75% load). Both tests are running roughly 650 seconds, which is very close to the expected runtime. That is very close to the threshold, so I expect the next test to run into thermal throttling. With the system being hat 50% of its capacity (3 GHz), the temperature was at 75☌. The first two tests with 1 CPU (25% load) and 2 CPU (50% load) did not result in thermal throttling. usr/bin/stress-ng -cpu 4 -cpu-method fft -cpu-ops 1000000 -metrics-brief usr/bin/stress-ng -cpu 3 -cpu-method fft -cpu-ops 750000 -metrics-brief usr/bin/stress-ng -cpu 2 -cpu-method fft -cpu-ops 500000 -metrics-brief usr/bin/stress-ng -cpu 1 -cpu-method fft -cpu-ops 250000 -metrics-brief The fixed set of instructions also allows me to see how thermal throttling increases the runtime. I'm using the CPU Method "Fast Fourier Transform" (fft) with 250000 CPU operations per CPU. This allows me to run repeatable tests with a fixed set of CPU instructions. To create CPU Load, the tool stress-ng is used. The ambient temperature (Measured with a DHT22) is 24.5☌.įor the stress tests, I've created a Virtual Machine running Raspberry Pi OS (Buster) with 4 Virtual CPUs. You can see that the temperature changes from 40☌ to 56☌, which is the baseline for my tests. To get the idle temperature, I've removed the fan at 16:10. There is a warning threshold at 70☌ and a critical at 80☌. This is the value I'm expecting to decrease when running into thermal throttling. To see when the Raspi is throttling, I'm also sending the ESXi hosts value to Graphite. To monitor the temperature, I'm using the Native ESXi on Arm hardware status driver and sending the Temperature to Graphite every 10 seconds.
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