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Full Discussion: cpu%/mem% usage, scripting, dzen2: howto learn bash the hard way
Operating Systems Linux Gentoo cpu%/mem% usage, scripting, dzen2: howto learn bash the hard way Post 302221136 by era on Sunday 3rd of August 2008 01:54:57 PM
Old 08-03-2008
For a small piece of code like that, I'm taking the liberty to quote

Quote:
Code:
#!/bin/bash

while [ 1 -eq 1 ]

The idiomatic way to code an endless loop is simply while true although you also see the obscure while : which avoids an external process (even though true is often a shell built-in in modern shells).

Quote:
Code:
do
	top -b -n 1 > /tmp/salidatop
	
	#primero cpu
	echo -n "^fg(green)CPU **"
	tail -n +8 /tmp/salidatop | sort -r -n -k9 | head -n 5 | while read line
	do 
		echo "$line" | awk ' { print "[^fg(cyan)",$12,"(^fg(red)",$9,"^fg(green)]--" } ' | tr -d ' ' | tr -d '\n'	 
	done

Is there a reason to feed awk a line at a time? Why not just

Code:
tail -n +8 /tmp/salidatop | sort -r -n -k9 | head -n 5 |
awk ' { printf "[^fg(cyan)",$12,"(^fg(red)",$9,"^fg(green)]--" } '

I don't see any spaces in the output, so tr -d ' ' seems superfluous. By using printf instead of print, there will be no trailing newline. As an aside, you could have combined the two tr:s to one: tr -d ' \n'

The same change could be applied below:

Quote:
Code:
	echo ">>"
	echo -n "^fg(green)MEM **"
	#segundo mem
	tail -n +8 /tmp/salidatop | sort -r -n -k10 | head -n 5 | while read line
	do 
		echo "$line" | awk ' { print "[^fg(cyan)",$12,"(^fg(red)",$10,"^fg(green)]--" } ' | tr -d ' ' | tr -d '\n'	 
	done

	echo ">>"
	
	sleep 5

done | dzen2 -ta l -u -l 1 -x 20 -y 710 -w 660 -e 'onstart=lower,uncollapse'

I don't understand the question about CPU percentage. You can add the user, system, and nice percentages, or just subtract the idle percentage from 100% as you note.

If you can replace the complex tail | head etc with a simple sed or awk script, that will probably help reduce the resource requirements. Perhaps you could pass some option to top to order the output like you want it, so you can avoid the separate sort -- that's probably the main bottleneck here (albeit a very minor one, with so little input).
 

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LEARN ABOUT DEBIAN

irsend

IRSEND(1)							   User Commands							 IRSEND(1)

NAME

       irsend - basic LIRC program to send infra-red commands

SYNOPSIS

       irsend [options] DIRECTIVE REMOTE CODE [CODE...]

DESCRIPTION

       Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such
       as TV boxes, HiFi sets, etc.

       DIRECTIVE can be:
	  SEND_ONCE	    - send CODE [CODE ...] once
	  SEND_START	    - start repeating CODE
	  SEND_STOP	    - stop repeating CODE
	  LIST		    - list configured remote items
	  SET_TRANSMITTERS  - set transmitters NUM [NUM ...]
	  SIMULATE	    - simulate IR event

       REMOTE is the name of a remote, as described in the lircd configuration file.

       CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file.

       NUM is the transmitter number of the hardware device.

       For the LIST DIRECTIVE, REMOTE and/or CODE can be empty:

	  LIST	 ""    ""   - list all configured remote names
	  LIST REMOTE  ""   - list all codes of REMOTE
	  LIST REMOTE CODE  - list only CODE of REMOTE

       The SIMULATE command only works if it has been explicitly enabled in lircd.

       -h --help
	      display usage summary

       -v --version
	      display version

       -d --device
	      use given lircd socket [/var/run/lirc/lircd]

       -a --address=host[:port]
	      connect to lircd at this address

       -# --count=n
	      send command n times

EXAMPLES

	  irsend LIST DenonTuner ""
	  irsend SEND_ONCE  DenonTuner PROG-SCAN
	  irsend SEND_ONCE  OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP
	  irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3
	  irsend SEND_STOP  OnkyoAmpli VOL-DOWN
	  irsend SET_TRANSMITTERS 1
	  irsend SET_TRANSMITTERS 1 3 4
	  irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S"

FILES

       /etc/lirc/lircd.conf
	      Default lircd configuration file.  It should contain all the remotes, their infra-red codes and the corresponding timing	and  wave-
	      form details.

DIAGNOSTICS

       If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics:
       "irsend: could not connect to socket"
       "irsend: Connection refused" (or "Permission denied").

SEE ALSO

       The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory.

       lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org.

irsend 0.9.0-pre1						   October 2010 							 IRSEND(1)
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