From d8c5b137f190f4c9a2b3ead9cfe229667868a3f3 Mon Sep 17 00:00:00 2001 From: Con Kolivas Date: Thu, 20 Oct 2016 15:35:26 +1100 Subject: [PATCH 62/80] hz-no_default_250.patch --- kernel/Kconfig.hz | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/kernel/Kconfig.hz b/kernel/Kconfig.hz index 2a202a8..b7926d8 100644 --- a/kernel/Kconfig.hz +++ b/kernel/Kconfig.hz @@ -23,13 +23,14 @@ choice with lots of processors that may show reduced performance if too many timer interrupts are occurring. - config HZ_250 + config HZ_250_NODEFAULT bool "250 HZ" help - 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. + 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. config HZ_300 bool "300 HZ" @@ -43,14 +44,16 @@ choice bool "1000 HZ" help 1000 Hz is the preferred choice for desktop systems and other - systems requiring fast interactive responses to events. + systems requiring fast interactive responses to events. Laptops + can also benefit from this choice without sacrificing battery life + if dynticks is also enabled. endchoice config HZ int default 100 if HZ_100 - default 250 if HZ_250 + default 250 if HZ_250_NODEFAULT default 300 if HZ_300 default 1000 if HZ_1000 -- 2.7.4