CONFIG_BUSY_WAIT_USES_ALTERNATE_CLOCK:

In tickless kernel mode, the system clock will be stopped when there are no timer events programmed. If the system clock is to be used to keep time e.g. to get a delta of time cycles then it needs to be turned on using provided APIs. Some platforms have alternate clocks which can be used instead. In that case this flag would be set to true. This flag would be checked before turning on the system clock in APIs that do busy wait reading clock cycles.

Symbol:

BUSY_WAIT_USES_ALTERNATE_CLOCK
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:
  • “Busy wait uses alternate clock in tickless kernel mode”
Default values:
  • n (value: “n”)
  • Condition: (none)
  • y (value: “y”)
  • Condition: (none)
Selects:

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

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

SYS_POWER_MANAGEMENT && BOARD_QUARK_SE_C1000_DEVBOARD (value: “n”)
Locations:
  • ../kernel/Kconfig.power_mgmt:102
  • ../boards/x86/quark_se_c1000_devboard/Kconfig.defconfig:48