AMD P-State vs. ACPI CPUFreq Testing With Ryzen Laptops On Linux 5.17

[Eumaios]

It would have been useful if all the tests had performance per watt results, simply saying pstates + schedutil wasn't as fast doesn't really give the full picture especially when the percentage difference isn't that much but could make a difference in how long the battery lasts

Didn't several tests provide this? For example, several SELENIUM benchmarks tested "Score per watt" (next to the little blue triangle showing whether higher or lower is better).

[Eumaios]

amd-pstate performance looks like a great compromise for laptops for general operation!

[smitty3268]

Didn't several tests provide this? For example, several SELENIUM benchmarks tested "Score per watt" (next to the little blue triangle showing whether higher or lower is better).

The problem is that the tests are still running benchmarks at full speed. Which is pretty much the easiest thing to optimize for - you just run the CPU at full power.

pstate is useful for cases where you're not running at full speed - in other words, non-benchmark loads. Something like a game test with fps capped to 60fps would be better, where you want the CPU to downclock when it can in order to save power, but still run as fast as it needs to.