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how to reduce the time for code execution?
import ipaddress import os ipnet=ipaddress.ip_network('192.12.0.0/24') for i in ipnet.hosts(): response=os.system('ping -c 1 ' + str(i)) if response == 0: print(i, " alive") else: print(i, " down") This is a script for ping whether the host is up or not. But the ping executes very slowly one by one per host or IP. Should I use multi threading or anything else? Isn't it possible to get output quickly?
5 Respuestas
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provided that your code is ok first I'd check internet speed, then the machine for overloading. processors are light years faster then network infrastructure, especially in home use
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never heard about parallel internet protocol in common use. I still believe u have a mess in machine and os/card configuration and a slow internet connection. true parallel pinging requires several machines and subsets of pinged address. in general speeds relate to computer speeds and network speeds. what's the point in having a strong machine and a dial-in access + pinged servers in the other hemisphere.
true parallel processing consists of chunks of algorithm processed by different cores inside a single infrastructure
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I am not saying your code is ok. It's not. For example -c should be replaced by -n.
I am just saying if you want true parallel execution you need at least two machines and two internet connections.
I did this, in windows, Python 3.xx
import os
flag = 0
flag = os.system( "ping -n 1 8.8.8.8 > null")
if flag == 0:
print ("up")
else:
print ("down")
As I expected in my previous posts there is a significant difference in speed of execution. In console it took ca. 22ms. but in Python nearly 4s.
If you need speed write it in ANSI C.
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In my script, the aim is to check which of the hosts(IP) are up and which of them are down. How can I check this status in parallel? Currently, the script checks one by one and it takes lots of time to check all the hosts under the given network (192.12.0.0/24)
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thanks skipper for your continuous responses.
So you are saying that I written my script correctly for my requirement. If you could execute my code from your machine to ping a network, that will be great.