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Top Forums UNIX for Dummies Questions & Answers Total cpu usage in percent(%) Post 302475051 by rbatte1 on Friday 26th of November 2010 09:26:55 AM
Old 11-26-2010
The supplied command sar it probably what you are after. If you are after the value since last boot, just fire it off without parameters. Depending on your installation, you may get hourly or 5 minute stats, but it is averaged at the end. This is usually controlled by the running of sa1, often by the cron table of user account adm.

The columns are usually %usr %sys %wio %idle, so it's up to you to decide if you want 100-%idle or if I/O wait should be considered.

If this answers what you need, great.

If you need average at the moment, you can supply a variety of parameters. You could have
Code:
sar 1 1

... which gets the information from the last 1 second. You can stretch this by increasing the first value. You can vary it by increaing the second value to show you more samples, e.g.
Code:
sar 3 5

... will report the usage over the last 3 seconds 5 times and then an average.

There are also reports generated by sa2, again usually by the cron table of adm. Read your manaul pages about sa2 for where this file is likely to be in your implementation if you have it enabled.





I hope that this helps.

Robin
Liverpool/Blackburn
UK
This User Gave Thanks to rbatte1 For This Post:
 

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CPU(1)							      General Commands Manual							    CPU(1)

NAME
cpu - connection to cpu server SYNOPSIS
cpu [ -h server ] [ -c cmd args ... ] DESCRIPTION
Cpu starts an rc(1) running on the server machine, or the machine named in the $cpu environment variable if there is no -h option. Rc's standard input, output, and error files will be /dev/cons in the name space where the cpu command was invoked. Normally, cpu is run in an 81/2(1) window on a terminal, so rc output goes to that window, and input comes from the keyboard when that window is current. Rc's cur- rent directory is the working directory of the cpu command itself. The name space for the new rc is an analogue of the name space where the cpu command was invoked: it is the same except for architecture- dependent bindings such as /bin and the use of fast paths to file servers, if available. If a -c argument is present, the remainder of the command line is executed by rc on the server, and then cpu exits. The name space is built by running /usr/$user/lib/profile with the root of the invoking name space bound to /mnt/term. The service envi- ronment variable is set to cpu; the cputype and objtype environment variables reflect the server's architecture. FILES
The name space of the terminal side of the cpu command is mounted on the CPU side on directory /mnt/term. SOURCE
/sys/src/cmd/cpu.c SEE ALSO
rc(1), 81/2(1) BUGS
Binds and mounts done after the terminal lib/profile is run are not reflected in the new name space. CPU(1)
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