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:254