diff options
| author | Con Kolivas <kernel@kolivas.org> | 2016-12-07 21:23:01 +1100 |
|---|---|---|
| committer | Con Kolivas <kernel@kolivas.org> | 2017-08-12 12:47:22 +1000 |
| commit | 7ee0db18cfc6f10a80f75c251b7c847ff3ffd8f9 (patch) | |
| tree | 0604d1fb30e82f0cdd1b7286769d741e7fec5c8b | |
| parent | 623efb0b76615aa2ca370f247d87515285d6985d (diff) | |
Reinstate default Hz of 100 in combination with MuQSS and -ck patches.
| -rw-r--r-- | kernel/Kconfig.hz | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/kernel/Kconfig.hz b/kernel/Kconfig.hz index 2a202a846757..f97168d50ecf 100644 --- a/kernel/Kconfig.hz +++ b/kernel/Kconfig.hz @@ -4,7 +4,8 @@ choice prompt "Timer frequency" - default HZ_250 + default HZ_100_MUQSS if SCHED_MUQSS + default HZ_250 if !SCHED_MUQSS 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 @@ -16,15 +17,30 @@ choice per second. + config HZ_100_MUQSS + bool "100 HZ" if SCHED_MUQSS + help + 100 Hz is a suitable choice in combination with MuQSS which does + not rely on ticks for rescheduling interrupts, and is not Hz limited + for timeouts and sleeps from both the kernel and userspace. + This allows us to benefit from the lower overhead and higher + throughput of fewer timer ticks. + config HZ_100 - bool "100 HZ" + bool "100 HZ" if !SCHED_MUQSS 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_MUQSS + bool "250 HZ" if SCHED_MUQSS + help + 250 Hz is the default choice for the mainline scheduler but not + advantageous in combination with MuQSS. + config HZ_250 - bool "250 HZ" + bool "250 HZ" if !SCHED_MUQSS help 250 Hz is a good compromise choice allowing server performance while also showing good interactive responsiveness even @@ -49,7 +65,9 @@ endchoice config HZ int + default 100 if HZ_100_MUQSS default 100 if HZ_100 + default 250 if HZ_250_MUQSS default 250 if HZ_250 default 300 if HZ_300 default 1000 if HZ_1000 |