According to https://builders.intel.com/docs/networkbuilders/intel-speed-select-technology-base-frequency-enhancing-performance.pdf ( test result, figure 3 ) , we can see not only power efficiency got improved but also performance ( throughput ).
Here are some of my questions:
- It looks CPU need Speed Select feature to get better performance? What if CPU (all cores) already set to max speed ? ( and turbo feature also enabled ), will SST feature still get better performance ?
- In my understanding, Linux already can set different cores to different freq, what's the difference compare to speed select?
One more question, according to:
It looks SST-PP and SST-BF both changed base_frequency, what's their major difference between SST-PP and SST-BF ?
Thank you for feedback.
I found a website:
Q1. It seems when using SST-PP, some cores will be disabled ?
However, according to your description, both SST-PP and SST-BF set some cores to higher base freq and some core to lower base freq.
Q2. According to a Intel github: https://github.com/intel/CommsPowerManagement
It seems we can set cores to different freq without SST feature ?