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# Timer Interrupt Frequency Configuration
prompt "Timer frequency"
default HZ_250
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"
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"
250 HZ is a good compromise choice allowing server performance
while also showing good interactive responsiveness even
on SMP and NUMA systems.
config HZ_1000
bool "1000 HZ"
1000 HZ is the preferred choice for desktop systems and other
systems requiring fast interactive responses to events.
config HZ
default 100 if HZ_100
default 250 if HZ_250
default 1000 if HZ_1000