Generic Monitor script for Xfce that shows the normalized load average in color

genmon-loadavg.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import print_function, division

import multiprocessing as mp
import os
import sys


KEYPOINTS = (
#    lavg  r     g     b
    (0.15, 0.25, 0.25, 0.25),
    (0.50, 0.40, 0.80, 0.40),
    (0.75, 1.00, 0.80, 0.00),
    (1.25, 1.00, 0.00, 0.00),
    (1.68, 1.00, 0.00, 1.00),
    (2.00, 1.00, 1.00, 1.00),
)


def find_keypoints(value):
    ifrom, ito = 0, 0

    while (ito < len(KEYPOINTS)) and (value >= KEYPOINTS[ito][0]):
        ito += 1
        ifrom = ito - 1

    if ito >= len(KEYPOINTS):
        ito = ifrom

    return KEYPOINTS[ifrom], KEYPOINTS[ito]


def interpolate(pos, left, right):
    return left + pos * (right - left)


def interpolate_color_keypoints(value, kfrom, kto):
    kdiff = kto[0] - kfrom[0]
    pos = (value - kfrom[0]) / kdiff if kdiff else 0

    r = interpolate(pos, kfrom[1], kto[1])
    g = interpolate(pos, kfrom[2], kto[2])
    b = interpolate(pos, kfrom[3], kto[3])

    return r, g, b

def get_load_hex_color(load):
    # Find the color values for the current load
    kptfrom, kptto = find_keypoints(load)
    r, g, b = interpolate_color_keypoints(load, kptfrom, kptto)

    return '#{:02x}{:02x}{:02x}'.format(int(255*r), int(255*g), int(255*b))


ncpus = mp.cpu_count()
loads = os.getloadavg()

hc1, hc2, hc3 = (get_load_hex_color(l / ncpus) for l in loads)

# Print in genmon forma
print('<txt><span foreground="{}">●</span> <span foreground="{}">●</span> <span foreground="{}">●</span></txt>'.format(hc1, hc2, hc3))
print('<tool>{:.02f}  {:.02f}  {:.02f}</tool>'.format(*loads))