Zephyr latency_measures

gistfile1.txt

M5Stack AtomS3 @240MHz

*** Booting Zephyr OS build zephyr-v3.5.0-2395-gc8f4455ef8f9 ***
Preemptive threads ctx switch via k_yield (K -> K)  :     579 cycles ,     2412 ns : 
Cooperative threads ctx switch via k_yield (K -> K) :     568 cycles ,     2370 ns : 
Switch from ISR back to interrupted thread          :     148 cycles ,      620 ns : 
Switch from ISR to another thread (kernel)          :     304 cycles ,     1270 ns : 
Create kernel thread from kernel thread             :     215 cycles ,      896 ns : 
Start kernel thread from kernel thread              :     573 cycles ,     2391 ns : 
Suspend kernel thread from kernel thread            :     681 cycles ,     2841 ns : 
Resume kernel thread from kernel thread             :     636 cycles ,     2654 ns : 
Abort kernel thread from kernel thread              :     205 cycles ,      858 ns : 
Give a semaphore (no waiters) from kernel thread    :      67 cycles ,      279 ns : 
Take a semaphore (no blocking) from kernel thread   :      41 cycles ,      171 ns : 
Take a semaphore (context switch K -> K)            :     727 cycles ,     3029 ns : 
Give a semaphore (context switch K -> K)            :     786 cycles ,     3279 ns : 
Lock a mutex from kernel thread                     :      44 cycles ,      187 ns : 
Unlock a mutex from kernel thread                   :      15 cycles ,       66 ns : 
Average time for heap malloc                        :     819 cycles ,     3416 ns : 
Average time for heap free                          :     709 cycles ,     2957 ns : 
===================================================================
PROJECT EXECUTION SUCCESSFUL




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STM32 F746G Disco @216 MHz

*** Booting Zephyr OS build zephyr-v3.5.0-2347-g76791cd70827 ***
Preemptive threads ctx switch via k_yield (K -> K)  :     318 cycles ,     1474 ns : 
Cooperative threads ctx switch via k_yield (K -> K) :     325 cycles ,     1507 ns : 
Switch from ISR back to interrupted thread          :     419 cycles ,     1943 ns : 
Switch from ISR to another thread (kernel)          :     461 cycles ,     2136 ns : 
Create kernel thread from kernel thread             :     354 cycles ,     1643 ns : 
Start kernel thread from kernel thread              :     465 cycles ,     2155 ns : 
Suspend kernel thread from kernel thread            :     439 cycles ,     2034 ns : 
Resume kernel thread from kernel thread             :     379 cycles ,     1756 ns : 
Abort kernel thread from kernel thread              :     304 cycles ,     1408 ns : 
Give a semaphore (no waiters) from kernel thread    :     105 cycles ,      486 ns : 
Take a semaphore (no blocking) from kernel thread   :      59 cycles ,      273 ns : 
Take a semaphore (context switch K -> K)            :     503 cycles ,     2332 ns : 
Give a semaphore (context switch K -> K)            :     605 cycles ,     2802 ns : 
Lock a mutex from kernel thread                     :      64 cycles ,      296 ns : 
Unlock a mutex from kernel thread                   :      22 cycles ,      101 ns : 
Average time for heap malloc                        :     429 cycles ,     1988 ns : 
Average time for heap free                          :     320 cycles ,     1482 ns : 
===================================================================
PROJECT EXECUTION SUCCESSFUL