- #75 PERCENT CPU THROTTLED PRO 2 SURFSCE PDF#
- #75 PERCENT CPU THROTTLED PRO 2 SURFSCE FULL#
- #75 PERCENT CPU THROTTLED PRO 2 SURFSCE SOFTWARE#
The program’s CPU usage slowly drops, and when it gets low enough, the CPU is throttled down to 50% of maximum.
#75 PERCENT CPU THROTTLED PRO 2 SURFSCE FULL#
At the start of the trace, the CPU is running at full power, and the program is using around 65% of that. In the above diagram, the blue line represents the maximum CPU currently available due to throttling, and the red line represents CPU usage as an absolute amount. If the CPU were reported as a percentage of current available resources, then performance monitoring tools would not only have to record the history of the process’s CPU usage, but they would also have to record the history of the system’s throttling behavior, in order to get an accurate assessment of how much CPU the program was using over time. While I sympathize with this point of view, I feel that reporting the CPU usage at 50% is a more accurate representation of the situation. The argument for the first point of view is that if your system is acting sluggish, or you hear the fan turn on, you want go to a performance monitor tool and see that, “Oh, program X is using 100% CPU, that’s the problem.” If the system had used the second model, you would see that program X is using 50% CPU, and you would say, “Well, that’s not the problem, because there’s still 50% CPU left for other stuff,” unaware that the other 50% of CPU capacity has been turned off due to throttling. One theory is that this should report 100% CPU usage, because that CPU-intensive program is causing the CPU to consume all of its available cycles.Īnother theory is that this should report 50% CPU usage, because even though that CPU-intensive program is causing the CPU to consume all of its available cycles, it is not consuming all off the cycles that are potentially available. The question is: What percentage CPU usage should performance monitoring tools report? Finally, let’s say that there’s a program that is CPU-intensive, calculating the Mandelbrot set or something. Assume for this scenario that the CPU has been throttled to half-speed for whatever reason, could be thermal, could be energy efficiency, could be due to workload.
#75 PERCENT CPU THROTTLED PRO 2 SURFSCE SOFTWARE#
for about 3 hours.ģ hours later the issue came back - again, a reboot resolved this however I can't be expected to reboot my laptop every 3 hours or so just to get the CPU above 0.8Ghz.For simplicity, let’s say you have a single-CPU system that supports “dynamic frequency scaling”, a feature that allows software to instruct the CPU to run at a lower speed, commonly known as “CPU throttling”. Finally I rebooted it which resolved the issue. I tried putting it to sleep and waking it again and also unplugging and reclogging the charger - nothing helped. The back surface was completely cool to the touch and the fans were not on whatsoever, yet the CPU just refuses to go over 0.8Ghz. Disk I/O usage is at 1% and my RAM is nowhere near full.
#75 PERCENT CPU THROTTLED PRO 2 SURFSCE PDF#
I tried opening a large PDF in Adobe Reader and a file in Adobe Photoshop and both took very long to load - while looking at task manager it looks like the CPU was still sitting at 0.8Ghz while these apps loaded. I opened Task Manager (which took 6+ seconds to load) to see that my CPU was basically stuck between 0.4 and 0.8Ghz. I was using my Surface Book fine until I noticed Microsoft Edge starting to lag out - opening new tabs would take 3 seconds and there was a visible delay when I typed into a text field, even though I had nothing open in the background.
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