admin-guide/pm/intel-speed-select.rst

152         enable-cpu-list:0,1,2,3,4,5,6,7,8,9,10,11,12,13,28,29,30,31,32,33,34,35,36,37,38,39,40,41
154         base-frequency(MHz):2600
168 condition is met, then base frequency of 2600 MHz can be maintained. To
181         enable-cpu-list:0,1,2,3,5,7,8,9,10,11,28,29,30,31,33,35,36,37,38,39
183         base-frequency(MHz):2800
211 This matches the base-frequency (MHz) field value displayed from the
261 Which shows that the base frequency now increased from 2600 MHz at performance
262 level 0 to 2800 MHz at performance level 4. As a result, any workload, which can
263 use fewer CPUs, can see a boost of 200 MHz compared to performance level 0.
402 	Specify clos min in MHz with [--min|-n]
403 	Specify clos max in MHz with [--max|-m]
412  clos min is not specified, default: 0 MHz
413  clos max is not specified, default: 25500 MHz
445         clos-min:0 MHz
447         clos-desired:0 MHz
455         clos-min:0 MHz
457         clos-desired:0 MHz
556 frequency of guaranteed frequency 2600 MHz.
587  0		5	5	1000
598 full guaranteed frequency of 2600 MHz.
613         high-priority-base-frequency(MHz):3000
615         high-priority-cpu-list:5,6,8,13,33,34,36,41
616         low-priority-base-frequency(MHz):2400
621 offer base frequency of 3000 MHz compared to the standard base frequency at this
625 high-priority-cpu-list) can only offer up to 2400 MHz. As a result, if this
629 400 MHz.
667 workload to high priority CPUs (CPU 5 and 6 in this case)::
669  #taskset -c 5,6 perf bench -r 100 sched pipe
678 observed that the high priority CPUs reached 3000 MHz compared to 2600 MHz.
688  0		5	5	3000
762             max-turbo-frequency(MHz):3200
765             max-turbo-frequency(MHz):3100
768             max-turbo-frequency(MHz):3100
771             max-turbo-frequency(MHz):3100
774             max-turbo-frequency(MHz):3100
775           bucket-5
777             max-turbo-frequency(MHz):3100
780             max-turbo-frequency(MHz):3100
783             max-turbo-frequency(MHz):3100
786 MHz can be achieved. If there is some busy workload on cpu 0 - 11 (e.g. stress)
805  0		5	5	3100
816 MHz. To check if the hackbench performance can be improved for CPU 12 and CPU
834             high-priority-max-frequency(MHz):3200
835             high-priority-max-avx2-frequency(MHz):3200
836             high-priority-max-avx512-frequency(MHz):3100
839             high-priority-max-frequency(MHz):3100
840             high-priority-max-avx2-frequency(MHz):3000
841             high-priority-max-avx512-frequency(MHz):2900
844             high-priority-max-frequency(MHz):3100
845             high-priority-max-avx2-frequency(MHz):3000
846             high-priority-max-avx512-frequency(MHz):2900
848             low-priority-max-frequency(MHz):2600
849             low-priority-max-avx2-frequency(MHz):2400
850             low-priority-max-avx512-frequency(MHz):2100
854 turbo frequency on those cores can be increased to 3200 MHz. This is 100 MHz
859 cores will be clipped to a lower frequency of 2600 MHz.
910 turbostat output will show that the CPU 12 and CPU 13 are getting 100 MHz boost.