2007-02-16 17:28:03 +08:00
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#
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# Timer subsystem related configuration options
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#
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2012-03-31 18:45:43 +08:00
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2012-05-18 15:59:57 +08:00
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# Options selectable by arch Kconfig
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# Watchdog function for clocksources to detect instabilities
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config CLOCKSOURCE_WATCHDOG
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bool
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# Architecture has extra clocksource data
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config ARCH_CLOCKSOURCE_DATA
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bool
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# Timekeeping vsyscall support
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config GENERIC_TIME_VSYSCALL
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bool
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# ktime_t scalar 64bit nsec representation
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config KTIME_SCALAR
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bool
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# Old style timekeeping
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config ARCH_USES_GETTIMEOFFSET
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bool
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# The generic clock events infrastructure
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config GENERIC_CLOCKEVENTS
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bool
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2012-05-22 05:16:18 +08:00
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# Migration helper. Builds, but does not invoke
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config GENERIC_CLOCKEVENTS_BUILD
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bool
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default y
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depends on GENERIC_CLOCKEVENTS
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2012-05-18 15:59:57 +08:00
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# Clockevents broadcasting infrastructure
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config GENERIC_CLOCKEVENTS_BROADCAST
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bool
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depends on GENERIC_CLOCKEVENTS
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2012-05-22 05:16:18 +08:00
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# Automatically adjust the min. reprogramming time for
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# clock event device
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config GENERIC_CLOCKEVENTS_MIN_ADJUST
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bool
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2012-05-18 15:59:57 +08:00
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# Generic update of CMOS clock
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config GENERIC_CMOS_UPDATE
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bool
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2012-05-22 05:16:18 +08:00
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if GENERIC_CLOCKEVENTS
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menu "Timers subsystem"
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# Core internal switch. Selected by NO_HZ / HIGH_RES_TIMERS. This is
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# only related to the tick functionality. Oneshot clockevent devices
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# are supported independ of this.
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config TICK_ONESHOT
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bool
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config NO_HZ
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bool "Tickless System (Dynamic Ticks)"
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depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
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select TICK_ONESHOT
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help
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This option enables a tickless system: timer interrupts will
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only trigger on an as-needed basis both when the system is
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busy and when the system is idle.
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config HIGH_RES_TIMERS
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bool "High Resolution Timer Support"
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depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
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select TICK_ONESHOT
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help
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This option enables high resolution timer support. If your
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hardware is not capable then this option only increases
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the size of the kernel image.
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endmenu
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endif
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