Hi.
On Tue, Oct 10, 2006 at 09:47:01AM +0900, Mr. Suhas Ghosh wrote:
> Hi,
> please some one tell me how to get the cpu usasge ?
> Is it possible from proc to get it?
Sure.
What OS you are talking about?
Linux? If you use Linux which kernel version?
2.4.x? 2.6.x? Which architecture? x86? x86_64? ia64?
> I want to draw the graph of cpu usage of my machine. I am giving my
> DS design.
> So please help me how to put the data in to it from proc
> or any other way.
The solution is in man 5 proc for Kernel 2.4.x:
[... snipp ...]
/proc/stat
kernel/system statistics. Varies with architecture. Common
entries include:
cpu 3357 0 4313 1362393
The amount of time, measured in units of USER_HZ (1/100ths
of a second on most architectures), that the system spent in user mode, user
mode with low priority (nice), system
mode, and the idle task, respectively. The last value
should be USER_HZ times the second entry in the uptime pseudo-file.
In Linux 2.6 this line includes three additional columns:
iowait - time waiting for I/O to complete (since 2.5.41); irq - time
servicing interrupts (since 2.6.0-test4);
softirq - time servicing softirqs (since 2.6.0-test4).
[... snipp ...]
and for Kernel 2.6.x:
[... snipp ...]
/proc/stat
kernel/system statistics. Varies with architecture. Common
entries include:
cpu 3357 0 4313 1362393
The number of jiffies (1/100ths of a second) that the
system spent in user mode, user mode with low priority (nice), system mode, and
the idle task, respectively. The last
value should be 100 times the second entry in the uptime
pseudo-file.
[... snipp ...]
> I am not using SNMP.
Do you collect the data using a Shellscript? Perl?
Using the information from /proc/stat you should change
your "GAUGE" declarations to "COUNTER" (or save the last
values, fetch the new one and calculate the difference,
so it is far much easier to use COUNTERs).
If you change the GAUGEs to COUNTERs you can use:
- with Kernel 2.4:
# Get user:nice:system:idle
cpudata=`grep '^cpu ' /proc/stat | sed -e 's/^cpu */N:/' -e 's/ /:/g'`
rrdtool upadte $rrd/cpu.rrd $cpudata
- with Kernel 2.6 (I will count the iowait,irq,softirq and values as system
values):
cpudata=`grep '^cpu ' /proc/stat | awk '{print "N:"$2":"$3":"$4+$6+$7":"$5;}'`
rrdtool update $rrd/cpu.rrd $cpudata
HTH,
Andreas.
--
Dipl.-Ing. Andreas Maus science+computing ag
System Administration Hagellocher Weg 73
mail: [EMAIL PROTECTED] 72070 Tuebingen, Germany
tel.: +49 7071 9457 456 www.science-computing.de
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