--- kernel/Kconfig.hz
+++ kernel/Kconfig.hz
@@ -4,7 +4,7 @@
choice
prompt "Timer frequency"
- default HZ_1000
+ 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
@@ -23,14 +23,13 @@ choice
with lots of processors that may show reduced performance if
too many timer interrupts are occurring.
- config HZ_250_NODEFAULT
+ config HZ_250
bool "250 HZ"
help
- 250 HZ is a lousy compromise choice allowing server interactivity
- while also showing desktop throughput and no extra power saving on
- laptops. No good for anything.
-
- Recommend 100 or 1000 instead.
+ 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"
@@ -44,82 +43,16 @@ choice
bool "1000 HZ"
help
1000 Hz is the preferred choice for desktop systems and other
- systems requiring fast interactive responses to events. Laptops
- can also benefit from this choice without sacrificing battery life
- if dynticks is also enabled.
-
- config HZ_1500
- bool "1500 HZ"
- help
- 1500 Hz is an insane value to use to run broken software that is Hz
- limited.
-
- Being over 1000, driver breakage is likely.
-
- config HZ_2000
- bool "2000 HZ"
- help
- 2000 Hz is an insane value to use to run broken software that is Hz
- limited.
-
- Being over 1000, driver breakage is likely.
-
- config HZ_3000
- bool "3000 HZ"
- help
- 3000 Hz is an insane value to use to run broken software that is Hz
- limited.
-
- Being over 1000, driver breakage is likely.
-
- config HZ_4000
- bool "4000 HZ"
- help
- 4000 Hz is an insane value to use to run broken software that is Hz
- limited.
-
- Being over 1000, driver breakage is likely.
-
- config HZ_5000
- bool "5000 HZ"
- help
- 5000 Hz is an obscene value to use to run broken software that is Hz
- limited.
-
- Being over 1000, driver breakage is likely.
-
- config HZ_7500
- bool "7500 HZ"
- help
- 7500 Hz is an obscene value to use to run broken software that is Hz
- limited.
-
- Being over 1000, driver breakage is likely.
-
- config HZ_10000
- bool "10000 HZ"
- help
- 10000 Hz is an obscene value to use to run broken software that is Hz
- limited.
-
- Being over 1000, driver breakage is likely.
-
+ systems requiring fast interactive responses to events.
endchoice
config HZ
int
default 100 if HZ_100
- default 250 if HZ_250_NODEFAULT
+ default 250 if HZ_250
default 300 if HZ_300
default 1000 if HZ_1000
- default 1500 if HZ_1500
- default 2000 if HZ_2000
- default 3000 if HZ_3000
- default 4000 if HZ_4000
- default 5000 if HZ_5000
- default 7500 if HZ_7500
- default 10000 if HZ_10000
config SCHED_HRTICK
def_bool HIGH_RES_TIMERS && (!SMP || USE_GENERIC_SMP_HELPERS)
projects / ziggy471-sgs3-jb.git / blobdiff