5 ms·
What struck me was how poor the CPU speed management was. The long-term outcome should have been 1GHz, not 600MHz, in most of the plots. The Pi jumps back-and-
by woofie11 7y ago
What struck me was how poor the CPU speed management was.
The long-term outcome should have been 1GHz, not 600MHz, in most of the plots. The Pi jumps back-and-forth between 1GHz and 1.5GHz until it overheats, and then throttles all the way down.
The vertical orientation made a small difference in temperature but a huge difference in how long the Pi took to throttle precisely because of poor clocking schedule.
- stkdump 7y agoI think you read it wrong. The time to throttle is the time it took to go to 1GHz for the first time. The load is applied for 600s and then disabled, at which point the CPU goes to 600MHz due to lack of work.
- isoprophlex 7y agoYeah that was my take too, they include some part of the sensor readings after the load was removed. Probably to show the temperature decay back to no-load conditions...
- woofie11 7y agoYou're right. My mistake. Unless it's also doing other stuff (e.g. shutting down cores), 1GHz isn't a huge throttle.