Tool for calculating CPU utilization by processes for Zabbix on FreeBSD

Tested on Zabbix 6.0 LTS and FreeBSD 13.2-RELEASE.

Install

• Place zabbix_get_cpu_proc_util.conf and proc_cpu_util.c to /usr/local/etc/zabbix6/zabbix_agentd.conf.d
• Compille source:

  cc -Weverything -lutil -lm -Ofast -march=native -flto proc_cpu_util.c -o proc_cpu_util
  

• Make sure you have: Include=/usr/local/etc/zabbix6/zabbix_agentd.conf.d/*.conf in your zabbix_agentd.conf
• Restart Zabbix Agent: service zabbix_agentd restart

Testing

zabbix_get -s <zabbix agent IP> -k 'proc.cpu.util["php-fpm"]'

Replace php-fpm by any other existing process name.

How does it work

The tool performs a query for the full process list, filters it by process name, and summarizes CPU utilization for all threads/processes. It assumes that 100% CPU usage occurs when all CPU threads have a 100% load. For example, if a process utilizes 100% of two CPU cores on hardware with 16 CPUs, that means the process utilizes 2 * 100 / 16 = 12% of the CPU.

Zabbix templates?

No templates. Use existing like PHP-FPM by Zabbix agent/App Varnish by Zabbix agent or make your own which will call proc.cpu.util["{$PROCESS_NAME}"].