diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/Kconfig.hz | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/kernel/Kconfig.hz b/kernel/Kconfig.hz index 248e1c396f8b..4af15802ccd4 100644 --- a/kernel/Kconfig.hz +++ b/kernel/Kconfig.hz @@ -7,7 +7,7 @@ choice 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 + 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. @@ -19,21 +19,30 @@ choice config HZ_100 bool "100 HZ" help - 100 HZ is a typical choice for servers, SMP and NUMA systems + 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 + 250 Hz is a good compromise choice allowing server performance while also showing good interactive responsiveness even - on SMP and NUMA systems. + 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 + 1000 Hz is the preferred choice for desktop systems and other systems requiring fast interactive responses to events. endchoice @@ -42,5 +51,6 @@ config HZ int default 100 if HZ_100 default 250 if HZ_250 + default 300 if HZ_300 default 1000 if HZ_1000 |