summaryrefslogtreecommitdiffstats
path: root/doc
diff options
context:
space:
mode:
authorPhilip Knirsch <pknirsch@hamburg.stuttgart.redhat.com>2009-02-10 18:45:38 +0100
committerPhilip Knirsch <pknirsch@hamburg.stuttgart.redhat.com>2009-02-10 18:45:38 +0100
commit5818e327421ff22f41618c7b9fa74be8d23d4fd5 (patch)
treefeb2bd13105a8c0086981d06190dbf70c73fbb65 /doc
parent28bd83e0d262ba1164d52fa1d9a551caab2e31e6 (diff)
downloadtuned-5818e327421ff22f41618c7b9fa74be8d23d4fd5.tar.gz
tuned-5818e327421ff22f41618c7b9fa74be8d23d4fd5.tar.xz
tuned-5818e327421ff22f41618c7b9fa74be8d23d4fd5.zip
- Added full network support
- Moved docs around a bit
Diffstat (limited to 'doc')
-rw-r--r--doc/TIPS.txt (renamed from doc/HOWTO.txt)20
1 files changed, 15 insertions, 5 deletions
diff --git a/doc/HOWTO.txt b/doc/TIPS.txt
index 9f2d0f9..6b76dd1 100644
--- a/doc/HOWTO.txt
+++ b/doc/TIPS.txt
@@ -1,5 +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)
* 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
@@ -12,17 +15,24 @@
** 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 every hour
-** echo "360000" > /proc/sys/vm/dirty_writeback_centisecs
+** Set flusing to once 5 minutes
+** echo "3000" > /proc/sys/vm/dirty_writeback_centisecs
** Enable laptop mode
-** echo "1" > /proc/sys/vm/laptop_mode
+** echo "5" > /proc/sys/vm/laptop_mode
+* Use relatime for your / partition
+** mount -o remount,relatime /
+* Disable CD-ROM polling from HAL (prevents popups when a CD is inserted):
+** hal-disable-polling --device /dev/scd0
+* Enable USB autosuspend by adding the following to the kernel boot commandline:
+** usbcore.autosuspend=5
* Screensaver needs to dpms off the screen, not just make colors black. To turn of monitor after 120s when X is running:
** xset dpms 0 0 120
=== Simple programmer tips for improving power usage ===
+* Avoid unecessary work/computation
* Wake up only when necessary
-* No poll() calls
-* If you wake up, do everything at once (race to idle)
+* 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)