topic Re: How do i get current cpu and memory utilization in linux using the c programming in Operating System - Linux

How do i get current cpu and memory utilization in linux using the c programming

nataraju K R_1 — Thu, 17 Nov 2005 23:45:14 GMT

I am writting the snmp agent for one device fo r that i need to send the traps when cpu and memory utilization execded the set thresholds for this i want know how do i get the current cpu and memory utilization using the c programs. If you have any progrmas please forward to me.

Thanks in advance

Thanks and Regards
Nataraju K R

Re: How do i get current cpu and memory utilization in linux using the c programming

Ross Minkov — Fri, 18 Nov 2005 02:30:10 GMT

You can call external commands to get utilization info (say vmstat) from your program, get the output in and parse it.

If you need an snmp agent to monitor cpu and mem util just use net-snmp. Once installed you can set your thresholds in snmpd.conf.

-Ross

Re: How do i get current cpu and memory utilization in linux using the c programming

Bill Thorsteinson — Fri, 18 Nov 2005 12:31:08 GMT

Check the code for uptime, and free.
Both are minimal programs accessing the
appropriate data from the kernel.

Re: How do i get current cpu and memory utilization in linux using the c programming

Hein van den Heuvel — Sun, 20 Nov 2005 13:33:34 GMT

I am sure there are dozens of agents written that already do what you are going to invent, and a lot more, and a lot more secure.
Maybe look at places like: http://net-snmp.sourceforge.net/

Still, of you want to only partially reinvent this wheel, check out sources for sar/top/vmstat.
For example:

http://cvs.sourceforge.net/viewcvs.py/*checkout*/procps/procps/vmstat.c?rev=1.30

fwiw,
Hein.