Oprs

Oprs is a process monitor for Linux. The name is an abbreviation for Observe Process ReSources.

It's based on procfs.

Features

• Monitor memory, execution time, input/output, page fault.
• Optional minimum and maximum.
• Select processes by PID, PID file or name.
• Display in plain text or a terminal UI.

Basic usage

To get the memory size, elapsed time and page fault of a process by PID (firefox), a process by pid file (lvmetad) and a process by name (bash), run:

oprs --human -p 6913 -f pulseaudio.pid -n dhclient -m mem:vm mem:rss+max time:elapsed fault:major

Without argument, the command prints the available metrics.

By default, the raw figure is printed unless -raw is added: mem:rss-raw+min+max.

CPU usage

Unlike other tools, the CPU usage of a process displayed by time:cpu+ratio is the percentage of the total CPU time. A process using all cores of a 4-cores system would be at 100%, not 400%.

The CPU usage is (stime + utime) / ((user - guest) + (nice - guest_nice) + system + idle + iowait + irq + softirq) where stime and utime comes from /proc/PID/stat and user, … from /proc/stat.

Export

In CSV export, the first column is the number of seconds since the Unix Epoch.

License

Copyright (c) 2020 Laurent Pelecq

oprs is distributed under the terms of the GNU General Public License version 3.

See the LICENSE GPL3 for details.