I guess you can't use the intel_pstate frequency governor with the AMD chip, nevertheless I feel like pointing out that on my machine (with kernel 4.8) the "acpi-cpufreq ondemand" appears to be about 1.6x slower for pure CPU code, compared to "intel_pstate powersave".
That's for a test that runs more than 10 secs, and remains the same if the test is run repeatedly.
"acpi-cpufreq performance" is more than 2x faster, and just slightly slower than "intel_pstate performance", in my test.
("intel_pstate performance" compared to "intel_pstate powersave" is about 1.5x faster.)
The performance modes of each also have the least variation in execution times, so to me they seem best suited for performance comparisons. However I haven't tested this as throughly as would be necessary, and it may have changed for kernel 4.10 since 4.8, and also it might be specific to my hardware.
That's for a test that runs more than 10 secs, and remains the same if the test is run repeatedly.
"acpi-cpufreq performance" is more than 2x faster, and just slightly slower than "intel_pstate performance", in my test.
("intel_pstate performance" compared to "intel_pstate powersave" is about 1.5x faster.)
The performance modes of each also have the least variation in execution times, so to me they seem best suited for performance comparisons. However I haven't tested this as throughly as would be necessary, and it may have changed for kernel 4.10 since 4.8, and also it might be specific to my hardware.
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