diff options
Diffstat (limited to 'kernel/time/Kconfig')
| -rw-r--r-- | kernel/time/Kconfig | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index c88fc43494c..27cc404ea18 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -75,17 +75,33 @@ config NO_HZ_COMMON depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS select TICK_ONESHOT +# Kept around for compatibility, maps to NO_HZ_IDLE config NO_HZ - bool "Tickless System (Dynamic Ticks)" + bool + +choice + prompt "Timer tick handling" + default NO_HZ_IDLE if NO_HZ + +config PERIODIC_HZ + bool "Periodic timer ticks (constant rate, no dynticks)" + help + This option keeps the tick running periodically at a constant + rate, even when the CPU doesn't need it. + +config NO_HZ_IDLE + bool "Idle dynticks system (tickless idle)" depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS select NO_HZ_COMMON help - This option enables a tickless system: timer interrupts will - only trigger on an as-needed basis both when the system is - busy and when the system is idle. + This option enables a tickless idle system: timer interrupts + will only trigger on an as-needed basis when the system is idle. + This is usually interesting for energy saving. + + Most of the time you want to say Y here. config NO_HZ_EXTENDED - bool "Full dynticks system" + bool "Full dynticks system (tickless single task)" # NO_HZ_COMMON dependency depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS # RCU_USER_QS @@ -112,6 +128,8 @@ config NO_HZ_EXTENDED Say N. +endchoice + config HIGH_RES_TIMERS bool "High Resolution Timer Support" depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS |