Annotation of /trunk/kernel26-alx/patches-2.6.17-r7/0015-2.6.17-hz-no_default_250.patch
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Fri May 18 11:04:36 2007 UTC (17 years, 5 months ago) by niro
File size: 1440 byte(s)
Fri May 18 11:04:36 2007 UTC (17 years, 5 months ago) by niro
File size: 1440 byte(s)
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| 1 | niro | 199 | Make 250 HZ a value that is not selected by default and give some better |
| 2 | recommendations in help. | ||
| 3 | |||
| 4 | Signed-off-by: Con Kolivas <kernel@kolivas.org> | ||
| 5 | |||
| 6 | kernel/Kconfig.hz | 15 +++++++++------ | ||
| 7 | 1 files changed, 9 insertions(+), 6 deletions(-) | ||
| 8 | |||
| 9 | Index: linux-ck-dev/kernel/Kconfig.hz | ||
| 10 | =================================================================== | ||
| 11 | --- linux-ck-dev.orig/kernel/Kconfig.hz 2006-06-18 15:23:58.000000000 +1000 | ||
| 12 | +++ linux-ck-dev/kernel/Kconfig.hz 2006-06-18 15:24:28.000000000 +1000 | ||
| 13 | @@ -21,14 +21,17 @@ choice | ||
| 14 | help | ||
| 15 | 100 HZ is a typical choice for servers, SMP and NUMA systems | ||
| 16 | with lots of processors that may show reduced performance if | ||
| 17 | - too many timer interrupts are occurring. | ||
| 18 | + too many timer interrupts are occurring. Laptops may also show | ||
| 19 | + improved battery life. | ||
| 20 | |||
| 21 | - config HZ_250 | ||
| 22 | + config HZ_250_NODEFAULT | ||
| 23 | bool "250 HZ" | ||
| 24 | help | ||
| 25 | - 250 HZ is a good compromise choice allowing server performance | ||
| 26 | - while also showing good interactive responsiveness even | ||
| 27 | - on SMP and NUMA systems. | ||
| 28 | + 250 HZ is a lousy compromise choice allowing server interactivity | ||
| 29 | + while also showing desktop throughput and no extra power saving on | ||
| 30 | + laptops. Good for when you can't make up your mind. | ||
| 31 | + | ||
| 32 | + Recommend 100 or 1000 instead. | ||
| 33 | |||
| 34 | config HZ_1000 | ||
| 35 | bool "1000 HZ" | ||
| 36 | @@ -41,6 +44,6 @@ endchoice | ||
| 37 | config HZ | ||
| 38 | int | ||
| 39 | default 100 if HZ_100 | ||
| 40 | - default 250 if HZ_250 | ||
| 41 | + default 250 if HZ_250_NODEFAULT | ||
| 42 | default 1000 if HZ_1000 | ||
| 43 |