plot cpu and memory usage

cpu-mem-plot

import matplotlib.pyplot as plt
import sys

'''
#!/bin/bash

while sleep 1; do
    sudo netstat -anp | grep "80 " | wc -l
    top -n 1 -b | grep -E "Cpu|Mem"
done
'''

'''
#!/bin/bash

echo 'CPU MEM CMD'
# while sleep 1; do ps --no-headers -C mfap -C media_ctrl -o %cpu,%mem,cmd; done
for i in {1..240}
do
    #ps --no-headers -C mfap -C media_ctrl -o %cpu,%mem,cmd
    top -n 1 -b | grep "myprogram" | awk '{print $9 " " $10 " myprogram"}'
    sleep 1
done
'''

'''
Output:

2029
Cpu(s):  1.0%us,  0.5%sy,  0.0%ni, 98.5%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  15463384k total,  1847176k used, 13616208k free,   492140k buffers
'''

rec_lst = []
memKB = None
cpu = None
halfopen = None
with open(sys.argv[1], 'r') as f:
    for item in f.readlines():
        if 'Mem' in item:
            memKB = int(item.split()[3][:-1])
        elif 'Cpu' in item:
            cpuItems = item.split()
            us = float(cpuItems[1][:-4])
            sy = float(cpuItems[2][:-4])
            ni = float(cpuItems[3][:-4])
            hi = float(cpuItems[6][:-4])
            si = float(cpuItems[7][:-4])
            #print(us, sy, ni, hi, si)
            cpu = us + sy + ni + hi + si
        else:
            halfopen = int(item.split()[0])
        if memKB is not None and halfopen is not None:
            rec_lst.append([memKB, cpu, halfopen])
            memKB = None
            halfopen = None
            cpu = None

#print(rec_lst)

fig, (ax0, ax1, ax2) = plt.subplots(3, 1)

ax0.plot(range(len(rec_lst)), [rec[0] for rec in rec_lst])
ax0.set_ylabel('mem usage (KB)');
#ax0.set_ylim([13000000, 14000000])
ax0.get_yaxis().get_major_formatter().set_scientific(False)

ax1.plot(range(len(rec_lst)), [rec[1] for rec in rec_lst])
ax1.set_ylabel('cpu usage (%)');

ax2.plot(range(len(rec_lst)), [rec[2] for rec in rec_lst])
ax2.set_ylabel('half open count (#)');

plt.show()