Is it possible to check CPU usage of simple script ?
For example: How to get the CPU usage in % of printing 100 times "hello world!" ?
Currently I'm getting the execution time in the console, by:
time -p python script.py
3 Answers
If you are on a unix machine, you could always open top in a new terminal and then observe the % usage while you run your python program. Alternatively, there are some 3rd party libraries you can use.
Here's one: Benchmark
Examples (taken from the py package index).
Program:
from benchmarker import Benchmarker
## specify number of loop
with Benchmarker(1000*1000, width=20) as bench:
s1, s2, s3, s4, s5 = "Haruhi", "Mikuru", "Yuki", "Itsuki", "Kyon"
@bench(None) ## empty loop
def _(bm):
for i in bm:
pass
@bench("join")
def _(bm):
for i in bm:
sos = ''.join((s1, s2, s3, s4, s5))
@bench("concat")
def _(bm):
for i in bm:
sos = s1 + s2 + s3 + s4 + s5
@bench("format")
def _(bm):
for i in bm:
sos = '%s%s%s%s%s' % (s1, s2, s3, s4, s5)
Results:
$ python example.py -h # show help
$ python example.py -o result.json
## benchmarker: release 4.0.0 (for python)
## python version: 3.4.2
## python compiler: GCC 4.8.2
## python platform: Linux-3.13.0-36-generic-x86_64-with-debian-jessie-sid
## python executable: /opt/vs/python/3.4.2/bin/python
## cpu model: Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz # 2494.050 MHz
## parameters: loop=1000000, cycle=1, extra=0
## real (total = user + sys)
(Empty) 0.0236 0.0200 0.0200 0.0000
join 0.2779 0.2800 0.2800 0.0000
concat 0.3792 0.3800 0.3800 0.0000
format 0.4233 0.4300 0.4300 0.0000
## Ranking real
join 0.2779 (100.0) ********************
concat 0.3792 ( 73.3) ***************
format 0.4233 ( 65.6) *************
## Matrix real [01] [02] [03]
[01] join 0.2779 100.0 136.5 152.3
[02] concat 0.3792 73.3 100.0 111.6
[03] format 0.4233 65.6 89.6 100.0
1 Comment
Pe Dro
Can you provide another example including the
if __name__ == '__main__': part ?You'll need the psutil module.
import psutil
print(psutil.cpu_percent())
3 Comments
Eryk Sun
psutil.cpu_percent is for the whole system, not an individual process. For just the current script, use current_process = psutil.Process(); print(current_process.cpu_percent()).
Debashis Sahoo
how to get cpu usage in each seconds
Matoran
Complementary to @ErykSun answer. Warning the first time this method is called with interval = 0.0 or None it will return a meaningless 0.0 value which you are supposed to ignore. The second call is just fine :).
This will not calculate the CPU usage, but the execution time.
Use timeit and find the difference in the initial time of the execution and the end of the program. For example:
import timeit
start_time = timeit.default_timer()
print("Hello World")
print("Hello World")
print("Hello World")
end_time = timeit.default_timer()
print (end_time - start_time)
2 Comments
Mayur Mahajan
Question asked is not about finding execution time, Its about evaluating CPU utilization.
dsomel21
@MayurMahajan, Thanks, I just edited my answer to reflect what it actually does.
topunix command.