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| author | Philip Knirsch <pknirsch@hamburg.stuttgart.redhat.com> | 2009-03-25 17:49:48 +0100 |
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| committer | Philip Knirsch <pknirsch@hamburg.stuttgart.redhat.com> | 2009-03-25 17:49:48 +0100 |
| commit | fde8c26f215ea7a20a3da88a7f91d2156288dd3d (patch) | |
| tree | 18ccc26db7ba679401d795c3b0c8512fed687479 /doc/TIPS.txt | |
| parent | 019e5d08cc04c5bbe5a16edb2fe8d2b3023a00a1 (diff) | |
| download | tuned-fde8c26f215ea7a20a3da88a7f91d2156288dd3d.tar.gz tuned-fde8c26f215ea7a20a3da88a7f91d2156288dd3d.tar.xz tuned-fde8c26f215ea7a20a3da88a7f91d2156288dd3d.zip | |
- Updated documentation, thanks to Marcela Maslanova!
Diffstat (limited to 'doc/TIPS.txt')
| -rw-r--r-- | doc/TIPS.txt | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/doc/TIPS.txt b/doc/TIPS.txt index 6b76dd1..e5104b0 100644 --- a/doc/TIPS.txt +++ b/doc/TIPS.txt @@ -1,8 +1,8 @@ === Simple user tips for improving power usage === -* Use a properly dimensioned system for the job (no need for overpowered systems for simple Desktop use e.g.) -* For servers consolidate services on fewer systems to maximize efficiency of each system -* Enforce turning of machines that are not used (e.g. company policy) -* Unplug and/or turn of peripherals that aren't used (e.g. external USB devices, monitors, printers, scanners) +* Use a properly dimensioned system for the job (no need for overpowered systems for simple Desktop use e.g.). +* For servers consolidate services on fewer systems to maximize efficiency of each system. +* Enforce turning of machines that are not used (e.g. company policy). +* Unplug and/or turn of peripherals that aren't used (e.g. external USB devices, monitors, printers, scanners). * Turn of unused hardware already in BIOS. * Disable power hungry features. * Enable CPU scaling if supported for ondemand CPU governor. DONT use powersave governor, typically uses more power than ondemand @@ -15,7 +15,7 @@ ** hdparm -S240 /dev/sda (20m idle to spindown) ** hdparm -B1 /dev/sda (Max powersave mode) * Make sure writes to hd don't wake it up too quickly: -** Set flusing to once 5 minutes +** Set flushing to once per 5 minutes ** echo "3000" > /proc/sys/vm/dirty_writeback_centisecs ** Enable laptop mode ** echo "5" > /proc/sys/vm/laptop_mode @@ -29,10 +29,10 @@ ** xset dpms 0 0 120 === Simple programmer tips for improving power usage === -* Avoid unecessary work/computation +* Avoid unnecessary work/computation * Wake up only when necessary * Do not actively poll in programs or use short regular timeouts, rather react to events * If you wake up, do everything at once (race to idle) and as fast as possible * Use large buffers to avoid frequent disk access. Write one large block at a time * Don't use [f]sync() if not necessary -* Group timers accross applications if possible (even systems) +* Group timers across applications if possible (even systems) |