#
  # Timer Interrupt Frequency Configuration
  #
  
  choice
  	prompt "Timer frequency"
  	default HZ_250
  	help
  	 Allows the configuration of the timer frequency. It is customary

  	 to have the timer interrupt run at 1000 Hz but 100 Hz may be more

  	 beneficial for servers and NUMA systems that do not need to have
  	 a fast response for user interaction and that may experience bus
  	 contention and cacheline bounces as a result of timer interrupts.
  	 Note that the timer interrupt occurs on each processor in an SMP
  	 environment leading to NR_CPUS * HZ number of timer interrupts
  	 per second.
  
  
  	config HZ_100
  		bool "100 HZ"
  	help

  	  100 Hz is a typical choice for servers, SMP and NUMA systems

  	  with lots of processors that may show reduced performance if
  	  too many timer interrupts are occurring.
  
  	config HZ_250
  		bool "250 HZ"
  	help

  	 250 Hz is a good compromise choice allowing server performance

  	 while also showing good interactive responsiveness even

  	 on SMP and NUMA systems. If you are going to be using NTSC video
  	 or multimedia, selected 300Hz instead.
  
  	config HZ_300
  		bool "300 HZ"
  	help
  	 300 Hz is a good compromise choice allowing server performance
  	 while also showing good interactive responsiveness even
  	 on SMP and NUMA systems and exactly dividing by both PAL and
  	 NTSC frame rates for video and multimedia work.

  
  	config HZ_1000
  		bool "1000 HZ"
  	help

  	 1000 Hz is the preferred choice for desktop systems and other

  	 systems requiring fast interactive responses to events.
  
  endchoice
  
  config HZ
  	int
  	default 100 if HZ_100
  	default 250 if HZ_250

  	default 300 if HZ_300

  	default 1000 if HZ_1000

  config SCHED_HRTICK

  	def_bool HIGH_RES_TIMERS && (!SMP || USE_GENERIC_SMP_HELPERS)