system/powernowd: Updated for version 1.00
This commit is contained in:
David Woodfall
David Somero
parent
6d9a73d91b
commit
d2c236cc65
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@ -1,12 +1,57 @@
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Overview:
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This is a very simple program that will adjust the speed of your CPU
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depending on system load. It works as a client of the CPUFreq driver.
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It is designed for use with CPU's supporting AMD's PowerNow power
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management scheme, as it's algorithm works better if there are more
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than two CPU speeds available. (aka, ARM, AMD K6/K7, Via C3, and
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Crusoe as opposed to traditional Intel and Ultrasparc).
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It is designed for use with CPU's supporting AMD's PowerNow power management
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scheme, as it's algorithm works better if there are more then two CPU
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speeds available. (aka, ARM, AMD K6/K7, Via C3, and Crusoe as opposed to
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traditional Intel and Ultrasparc).
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Powernowd uses the userspace governor, which is included in the Slackware
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kernel images.
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This program is essentially a simple client to the CPUFreq sysfs interface.
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This means that you -need- to be running Linux v2.5 or later that includes
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the sysfs interface. This daemon will -not- work with the CPUFreq driver
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interface included in Linux v2.4. Feel free to write your own daemon
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to support that if you like; you can even use this as a starting point.
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If there's enough clamoring for it, then maybe I'll whip up something.
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You also need a CPU that supports frequency scaling and supports the CPUFreq
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interface. This code has been tested on various AMD and PPC processors
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It is not wise to run two concurrent cpu frequency adjusting programs,
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for example, cpufreqd and powernowd simultaneously.
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I have been running this daemon on my AMD laptop for over 2 years with no
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problems to report, and it's nice that my laptop remains cool unless I'm
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really doing something intensive, like watching DivX movies, without me
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having to manually intervene and set the speed. I just recently bought an
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Apple iBook G3, and powernowd-0.80 worked flawlessly on it right out of
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the box.
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Features:
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This daemon's goal is simplicity and speed. It doesn't try and make
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too many decisions for you. That's its beauty, but it may not be what
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everyone's looking for. Some of the features this daemon has:
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One, simple heuristic to determine CPU load: "user + sys" time.
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Ignore "niced" programs (setiathome, itself, etc). In my mind this is
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consistent with what is meant when someone 'nice's a program to begin
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with. (configurable in v0.85+) Designed for CPU's that support more
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then two speed states, but works well with anything. Very fast, low
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overhead /proc/stat gathering (method stolen from procps). Supports SMP
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Will automatically switch to 'userspace' governor. Care taken to make
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the code non-root exploitable (but please audit for yourself first!)
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Frequency step size is configurable (default to 100MHz/step) 4 different
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behavioral modes to choose from (SINE, AGGRESSIVE, PASSIVE, LEAPS),
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which determine the behavior when the load changes. Configurable from the
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command line. Written in C for speed and simplicity. Logging to stdout
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or syslog Configurable Polling frequency in milliseconds (defaults to 1s)
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Configurable highwater/lowwater marks for CPU usage. (defaults 80/20%)
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Many similar daemons use other methods to determine what speed to use,
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such as battery status, AC status, temperature, fan status, etc. They all
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have their place. I however feel that in the grand scheme of things none
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of the above matters. When I'm not using my CPU, I don't care if it's
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running at a slower speed. When I -am- using my CPU, I only need it to
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be fast enough to handle the task at hand without hiccuping. And when I'm
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taxing my CPU, I want it running full speed. That's all this daemon does,
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monitor CPU load and adjust the speed accordingly. Since in all reality
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my CPU is idle 99% of the time (or playing mp3's which it can easily do
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at it's lowest speed rating), this by definition leads to low power usage,
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low temperatures, low speed fans, and better battery life.
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@ -1,22 +0,0 @@
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config() {
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NEW="$1"
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OLD="$(dirname $NEW)/$(basename $NEW .new)"
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# If there's no config file by that name, mv it over:
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if [ ! -r $OLD ]; then
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mv $NEW $OLD
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elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then
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# toss the redundant copy
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rm $NEW
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fi
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# Otherwise, we leave the .new copy for the admin to consider...
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}
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# Keep same perms on rc.powernowd.new:
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if [ -e etc/rc.d/rc.powernowd ]; then
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cp -a etc/rc.d/rc.powernowd etc/rc.d/rc.powernowd.new.incoming
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cat etc/rc.d/rc.powernowd.new > etc/rc.d/rc.powernowd.new.incoming
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mv etc/rc.d/rc.powernowd.new.incoming etc/rc.d/rc.powernowd.new
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fi
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config etc/rc.d/rc.powernowd.new
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@ -1,108 +0,0 @@
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.\" Hey, EMACS: -*- nroff -*-
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.\" First parameter, NAME, should be all caps
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.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
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.\" other parameters are allowed: see man(7), man(1)
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.TH POWERNOWD 1 "November 3, 2003"
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.\" Please adjust this date whenever revising the manpage.
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.\"
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.\" Some roff macros, for reference:
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.\" .nh disable hyphenation
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.\" .hy enable hyphenation
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.\" .ad l left justify
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.\" .ad b justify to both left and right margins
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.\" .nf disable filling
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.\" .fi enable filling
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.\" .br insert line break
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.\" .sp <n> insert n+1 empty lines
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.\" for manpage-specific macros, see man(7)
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.SH NAME
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powernowd \- control the speed and voltage of cpus
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.SH SYNOPSIS
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.B powernowd
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.RI [ options ]
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.SH DESCRIPTION
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This is a simple client to the cpufreq driver, and uses the sysfs interface
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in Linux kernel version 2.6. You need a supported cpu, and a
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kernel that supports sysfs to run this daemon.
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The name is somewhat misleading, as any processor supported by the kernel
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cpufreq driver will work, not just processors supporting AMD's
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PowerNow! technology. This daemon works best with processors that support
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more then 2 frequency steps, like those with AMD's PowerNow!, and Intel's
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Pentium M family.
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.SH OPTIONS
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.TP
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.B \-h
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Prints a help message.
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.TP
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.B \-d
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Don't detach from terminal (default is to detach and run in the background)
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.TP
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.B \-v
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Increase output verbosity, can be used more than once.
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.TP
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.B \-q
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Quiet mode, only emergency output.
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.TP
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.B \-n
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Include nice'd processes in calculations.
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.TP
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.B \-m
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Modes of operation, 0 = SINE, 1 = AGGRESSIVE (default), 2 = PASSIVE, 3 = LEAPS
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.TP
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.B \-s
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Frequency step in kHz (default = 100000)
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.TP
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.B \-p
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Polling frequency in msecs (default = 1000)
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.TP
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.B \-u
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CPU usage upper limit percentage [0 .. 100, default 80]
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.TP
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.B \-l
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CPU usage lower limit percentage [0 .. 100, default 20]
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.SH MODES
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There are 4 modes supported by this client:
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Mode 0, SINE, changes the frequency as a sine wave function, raising the
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frequency by "step" Hz every time the CPU usage goes over 80%,
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and decreases it by "step" Hz when the CPU usage falls under 20%.
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Mode 1, AGGRESSIVE, changes frequency by a sawtooth function.
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Immediately jumps to the highest frequency whenever CPU usage goes
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over 80%, and decreases by "step" Hz as usage drops below
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20%. This is the default behavior.
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Mode 2, PASSIVE, is the inverse of AGGRESSIVE.
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Immediately jump to lowest frequency when usage drops below 20%.
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Raise by "step" Hz if it goes above 80%.
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Mode 3, LEAPS, immediately jumps to the highest frequency if usage is above
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80%, and immediately jumps to the lowest frequency if usage is below 20%.
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.SH PHILOSOPHY
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Why another CPUFreq client daemon?
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Some other daemons are better suited for two speed states, and
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toggle between two states based upon load. This daemon does a better job
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handling intermediate steps.
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Other daemons are written in Perl, Python, or C++. This is a simple C
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program.
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Some other daemons rely on APM or ACPI.
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The sysfs interface to the 2.6
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kernel is simple, completely sufficient, and completely portable to all
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architectures that support the CPUfreq support in the kernel.
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Some other daemons change thier behavior based upon battery status, AC
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status, temperature, etc. What good is having a nice powerful laptop if
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you can't use it at full speed, even for a few seconds, while on battery
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power? This daemon just measures CPU load, and bases decisions solely
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upon that.
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SMP systems are supported, making this daemon useful for servers, too!
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.SH AUTHOR
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The powernowd program was written by John Clemens <clemej@alum.rpi.edu>
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This manual page was written by Bdale Garbee <bdale@gag.com>,
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for the Debian project (but may be used by others).
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@ -2,7 +2,7 @@
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# Slackware build script for powernowd
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# Written by Daniel LEVAI leva@ecentrum.hu
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# Written by David Woodfall info@davidwoodfall.co.uk
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PRGNAM=powernowd
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VERSION=${VERSION:-1.00}
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@ -17,16 +17,19 @@ OUTPUT=${OUTPUT:-/tmp}
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if [ "$ARCH" = "i486" ]; then
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SLKCFLAGS="-O2 -march=i486 -mtune=i686"
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LIBDIRSUFFIX=""
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elif [ "$ARCH" = "i686" ]; then
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SLKCFLAGS="-O2 -march=i686 -mtune=i686"
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LIBDIRSUFFIX=""
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elif [ "$ARCH" = "x86_64" ]; then
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SLKCFLAGS="-O2 -fPIC"
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LIBDIRSUFFIX="64"
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fi
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set -e # Exit on most errors
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set -e
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rm -rf $PKG
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mkdir -p $TMP $PKG $OUTPUT
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mkdir -p $TMP $OUTPUT $PKG/usr/sbin
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cd $TMP
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rm -rf $PRGNAM-$VERSION
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tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
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@ -38,28 +41,25 @@ find . \
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\( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
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-exec chmod 644 {} \;
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# We'll do all of this manually
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gcc $SLKCFLAGS -Wall -o powernowd powernowd.c
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make
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install -m 755 powernowd $PKG/usr/sbin
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mkdir -p $PKG/usr/sbin
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strip --strip-unneeded powernowd
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install -m 755 powernowd $PKG/usr/sbin/
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mkdir -p $PKG/etc/rc.d/
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cat $CWD/rc.powernowd.new > $PKG/etc/rc.d/rc.powernowd.new
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mkdir -p $PKG/usr/man/man1
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gzip -9c $CWD/powernowd.1 > $PKG/usr/man/man1/powernowd.1.gz
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( cd $PKG
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find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | \
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xargs strip --strip-unneeded 2> /dev/null || true
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find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | \
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xargs strip --strip-unneeded 2> /dev/null || true
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)
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mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
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cp -a \
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README \
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$PKG/usr/doc/$PRGNAM-$VERSION
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powernowd.init \
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$PKG/usr/doc/$PRGNAM-$VERSION
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cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
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mkdir -p $PKG/install
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cat $CWD/slack-desc > $PKG/install/slack-desc
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cat $CWD/doinst.sh > $PKG/install/doinst.sh
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cd $PKG
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/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.tgz
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/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
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@ -1,8 +1,10 @@
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PRGNAM="powernowd"
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VERSION="1.00"
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HOMEPAGE="http://deater.net/john/powernowd.html"
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DOWNLOAD="http://deater.net/john/powernowd-1.00.tar.gz"
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HOMEPAGE="http://www.deater.net/john/powernowd.html"
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DOWNLOAD="http://www.deater.net/john/powernowd-1.00.tar.gz"
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MD5SUM="abc48b690d104e9e71a85400ba19d799"
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MAINTAINER="Daniel LEVAI"
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EMAIL="leva@ecentrum.hu"
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APPROVED="rworkman"
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DOWNLOAD_x86_64=""
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MD5SUM_x86_64=""
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MAINTAINER="David Woodfall"
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EMAIL="info@davidwoodfall.co.uk"
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APPROVED="dsomero"
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@ -1,54 +0,0 @@
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#!/bin/sh
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# Written by Daniel LEVAI for the Slackware package
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# Modified by Robby Workman <rworkman@slackbuilds.org>
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# For the options, see the README of the man page
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#OPTS='-q'
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powernowd_start() {
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local PID=$(pgrep -x powernowd);
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if [ $PID ];then
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echo "powernowd is already running ($PID)"
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exit 1
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else
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/usr/sbin/powernowd $OPTS
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fi
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}
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powernowd_stop() {
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local PID=$(pgrep -x powernowd);
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if [ -z $PID ];then
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echo "powernowd is not running"
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exit 1
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else
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local i=1
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while pgrep -x powernowd > /dev/null;do
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if [ $i -gt 3 ];then
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echo "Couldn't stop powernowd..."
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exit 1
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fi
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pkill -x powernowd
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i=$(( $i + 1 ));
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sleep 1;
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done
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fi
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}
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case "$1" in
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start)
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powernowd_start
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;;
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stop)
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powernowd_stop
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;;
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restart)
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powernowd_stop
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sleep 1
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powernowd_start
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;;
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*)
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echo "$0 <start|stop|restart>"
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;;
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esac
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@ -5,15 +5,15 @@
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# make exactly 11 lines for the formatting to be correct. It's also
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# customary to leave one space after the ':'.
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|-----handy-ruler-------------------------------------------------------|
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powernowd: This is a very simple program that will adjust the speed of your CPU
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|-----handy-ruler------------------------------------------------------|
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powernowd: powernowd (a cpu frequency daemon)
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powernowd:
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powernowd: This is a very simple program that will adjust the speed of your CPU
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powernowd: depending on system load. It works as a client of the CPUFreq driver.
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powernowd: It is designed for use with CPU's supporting AMD's PowerNow power
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powernowd: management scheme, as it's algorithm works better if there are more
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powernowd: then two CPU speeds available. (aka, ARM, AMD K6/K7, Via C3, and
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powernowd: It is designed for use with CPU's supporting AMD's PowerNow power
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powernowd: management scheme, as it's algorithm works better if there are more
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powernowd: then two CPU speeds available. (aka, ARM, AMD K6/K7, Via C3, and
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powernowd: Crusoe as opposed to traditional Intel and Ultrasparc).
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powernowd:
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powernowd: http://deater.net/john/powernowd.html
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powernowd:
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powernowd:
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powernowd:
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