CONFIG_BOOT_TIME_MEASUREMENT

This option enables the recording of timestamps during system start up. The global variable __start_tsc records the time kernel begins executing, while __main_tsc records when main() begins executing, and __idle_tsc records when the CPU becomes idle. All values are recorded in terms of CPU clock cycles since system reset.

Symbol:

BOOT_TIME_MEASUREMENT
Type:

bool
Value:

“n”
User value:

(no user value)
Visibility:

“n”
Is choice item:

false
Is defined:

true
Is from env.:

false
Is special:

false
Prompts:
  • “Boot time measurements [EXPERIMENTAL]” if PERFORMANCE_METRICS (value: “n”)
Default values:
  • n (value: “n”)
  • Condition: PERFORMANCE_METRICS (value: “n”)
Selects:

(no selects)
Reverse (select-related) dependencies:
 

(no reverse dependencies)
Additional dependencies from enclosing menus and ifs:
 

(no additional dependencies)
Locations:
  • ../misc/Kconfig:240