Measure the CPU and memory consumption of your linux system with psutil

performance.py

#!/usr/bin/env python

# Measure the CPU and memory of your linux system with psutil
#
# - Installation: The setup this system you need to run 'pip3 install psutil'
# - Usage: python3 performance.py

import psutil as PSUTIL
import time

# constants
TO_MB = 1/1000000
START_TIME = time.time()

# configure
TOTAL_MEASUREMENT_SECONDS = 2

# list of measurement data
cpu_usage_list           = [] # %
memory_used_percent_list = [] # %
memory_used_list         = [] # MB
memory_free_list         = [] # MB
memory_cached_list       = [] # MB
memory_buffers_list      = [] # MB
memory_total_available   = [] # MB

while (time.time() - START_TIME < TOTAL_MEASUREMENT_SECONDS) :
        ### CPU ###
        cpu_usage_list.append(float(PSUTIL.cpu_percent(interval=1)))

        ### MEMORY ###
        memory_check = PSUTIL.virtual_memory()
        memory_used_percent_list.append(float(memory_check.percent))
        # USED: memory used, calculated differently depending on the platform and designed 
        # for informational purposes only. total - free does not necessarily match used.
        memory_used_list.append(float(memory_check.used)*TO_MB)
        # FREE: memory not being used at all (zeroed) that is readily available; note that this 
        # doesn’t reflect the actual memory available (use available instead). 
        # total - used does not necessarily match free.
        memory_free_list.append(float(memory_check.free)*TO_MB)
        # CACHED: cache for various things.
        memory_cached_list.append(float(memory_check.cached)*TO_MB)
        # BUFFERS: cache for things like file system metadata.
        memory_buffers_list.append(float(memory_check.buffers)*TO_MB)
        # TOTAL: total physical memory (exclusive swap)
        memory_total_available.append(float(memory_check.available)*TO_MB)

        if int(time.time() - START_TIME)/TOTAL_MEASUREMENT_SECONDS*100 < 100:
                print("Recording performance data. Progress: {}%".format(round(int(time.time() - START_TIME)/TOTAL_MEASUREMENT_SECONDS*100),2), end="\r")
        else:
                print("Recording performance data. Progress: 100%")
                print("Finished.")


print("\nResults (over {} seconds):".format(TOTAL_MEASUREMENT_SECONDS))
print("|-----------------------------------|")
print("| Avg. CPU:           | {:.2f}    % |".format(sum(cpu_usage_list)/len(cpu_usage_list)))
print("| Avg. MEM used:      | {:.2f}    % |".format(sum(memory_used_percent_list)/len(memory_used_percent_list)))
print("| Avg. MEM free:      | {:.2f}   MB |".format(sum(memory_free_list)/len(memory_free_list)))
print("| Avg. MEM used:      | {:.2f}   MB |".format(sum(memory_used_list)/len(memory_used_list)))
print("| Avg. MEM cached:    | {:.2f}   MB |".format(sum(memory_cached_list)/len(memory_cached_list) + sum(memory_buffers_list)/len(memory_buffers_list)))
print("| Avg. MEM available: | {:.2f}   MB |".format(sum(memory_total_available)/len(memory_total_available)))
print("|-----------------------------------|")