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

154         base-frequency(MHz):2600
168 condition is met, then base frequency of 2600 MHz can be maintained. To
183         base-frequency(MHz):2800
211 This matches the base-frequency (MHz) field value displayed from the
215 To check if the average frequency is equal to the base frequency for a 100% busy
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.
424 	Specify clos min in MHz with [--min|-n]
425 	Specify clos max in MHz with [--max|-m]
434  clos min is not specified, default: 0 MHz
435  clos max is not specified, default: 25500 MHz
467         clos-min:0 MHz
469         clos-desired:0 MHz
477         clos-min:0 MHz
479         clos-desired:0 MHz
578 frequency of guaranteed frequency 2600 MHz.
591  # taskset -c 3,4 perf bench -r 100 sched pipe
620 full guaranteed frequency of 2600 MHz.
635         high-priority-base-frequency(MHz):3000
638         low-priority-base-frequency(MHz):2400
643 offer base frequency of 3000 MHz compared to the standard base frequency at this
647 high-priority-cpu-list) can only offer up to 2400 MHz. As a result, if this
651 400 MHz.
691  #taskset -c 5,6 perf bench -r 100 sched pipe
700 observed that the high priority CPUs reached 3000 MHz compared to 2600 MHz.
784             max-turbo-frequency(MHz):3200
787             max-turbo-frequency(MHz):3100
790             max-turbo-frequency(MHz):3100
793             max-turbo-frequency(MHz):3100
796             max-turbo-frequency(MHz):3100
799             max-turbo-frequency(MHz):3100
802             max-turbo-frequency(MHz):3100
805             max-turbo-frequency(MHz):3100
808 MHz can be achieved. If there is some busy workload on cpu 0 - 11 (e.g. stress)
811  # taskset -c 12,13 perf bench -r 100 sched pipe
838 MHz. To check if the hackbench performance can be improved for CPU 12 and CPU
856             high-priority-max-frequency(MHz):3200
857             high-priority-max-avx2-frequency(MHz):3200
858             high-priority-max-avx512-frequency(MHz):3100
861             high-priority-max-frequency(MHz):3100
862             high-priority-max-avx2-frequency(MHz):3000
863             high-priority-max-avx512-frequency(MHz):2900
866             high-priority-max-frequency(MHz):3100
867             high-priority-max-avx2-frequency(MHz):3000
868             high-priority-max-avx512-frequency(MHz):2900
870             low-priority-max-frequency(MHz):2600
871             low-priority-max-avx2-frequency(MHz):2400
872             low-priority-max-avx512-frequency(MHz):2100
876 turbo frequency on those cores can be increased to 3200 MHz. This is 100 MHz
881 cores will be clipped to a lower frequency of 2600 MHz.
924  #taskset -c 12,13 perf bench -r 100 sched pipe
932 turbostat output will show that the CPU 12 and CPU 13 are getting 100 MHz boost.