53 lines
1.7 KiB
Diff
53 lines
1.7 KiB
Diff
Make 250HZ not be the default to discourage desktop users from choosing this
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option since 1000 will provide better latencies with only miniscule amounts
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of extra overhead and power consumption.
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-ck
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---
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kernel/Kconfig.hz | 17 ++++++++++-------
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1 file changed, 10 insertions(+), 7 deletions(-)
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Index: linux-3.16-ck1/kernel/Kconfig.hz
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===================================================================
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--- linux-3.16-ck1.orig/kernel/Kconfig.hz 2014-08-16 14:46:12.299916810 +1000
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+++ linux-3.16-ck1/kernel/Kconfig.hz 2014-08-16 14:46:12.298916810 +1000
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@@ -23,13 +23,14 @@ choice
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with lots of processors that may show reduced performance if
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too many timer interrupts are occurring.
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- config HZ_250
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+ config HZ_250_NODEFAULT
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bool "250 HZ"
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help
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- 250 Hz is a good compromise choice allowing server performance
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- while also showing good interactive responsiveness even
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- on SMP and NUMA systems. If you are going to be using NTSC video
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- or multimedia, selected 300Hz instead.
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+ 250 HZ is a lousy compromise choice allowing server interactivity
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+ while also showing desktop throughput and no extra power saving on
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+ laptops. No good for anything.
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+
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+ Recommend 100 or 1000 instead.
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config HZ_300
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bool "300 HZ"
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@@ -43,14 +44,16 @@ choice
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bool "1000 HZ"
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help
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1000 Hz is the preferred choice for desktop systems and other
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- systems requiring fast interactive responses to events.
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+ systems requiring fast interactive responses to events. Laptops
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+ can also benefit from this choice without sacrificing battery life
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+ if dynticks is also enabled.
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endchoice
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config HZ
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int
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default 100 if HZ_100
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- default 250 if HZ_250
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+ default 250 if HZ_250_NODEFAULT
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default 300 if HZ_300
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default 1000 if HZ_1000
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