Slow response time of psutil Process Iter

[ajikumarmp]

Hi,

I have used PSUTIL for solving a problem where I wanted to check if my application is already running on windows. I used the code below and that works but I see that I get response almost a minute or mote later, this I felt is too much time, are there any other methods by which this can be done faster or any other suggestions to get a faster result?

def listprocessRunning():
    for proc in psutil.process_iter():
        try:
            #print "Process Names", proc.name()
            if proc.name() == "MY APP":
                print "My APP is running"
        except (psutil.NoSuchProcess, psutil.AccessDenied) as e:
            print " Permission error and cannot access"

[giampaolo]

1 minute? That's very weird by just getting the process name(), unless you have thousands of processes running.

[ajikumarmp]

That is true, I just used a stop watch to verify that and I clocked 58 seconds, this was run on PC that had multiple users accounts. I did try to run this on my laptop which is a single user and to my surprise I got results in 2 seconds. I then checked the no of process running and found that multi user PC only had 11 more process running. Can you think of any potential causes because of the need to run through multiple user accounts? Having to run my tool on multiple account PC's is a valid scenario. regards Aji/

…

On Wed, May 10, 2017 at 2:16 PM, giampaolo ***@***.***> wrote: 1 minute? That's very weird by just getting the process name(), unless you have milions of processes running. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1061 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AbSBSw7ScVUMPhB0mvMYjfzzKthoHLuSks5r4g0fgaJpZM4NXGZ_> .

[giampaolo]

What is it that takes so much time? name()? or process_iter()?
Here, try this:

import psutil, time, contextlib


@contextlib.contextmanager
def timeit(what):
    t = time.time()
    yield
    print("%-30s: %f secs" % (what, time.time() - t))


def main():
    ls = psutil.process_iter()
    while 1:
        with timeit("process_iter next()"):
            try:
                proc = next(ls)
            except StopIteration:
                break
        with timeit("name()"):
            proc.name()


main()

[ajikumarmp]

Hi, Both are taking time, this is on the remote PC where I am running. ``` process_iter next() : 0.896000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.300000 secs name() : 0.364000 secs process_iter next() : 0.180000 secs name() : 0.201000 secs process_iter next() : 0.164000 secs name() : 0.214000 secs process_iter next() : 0.205000 secs name() : 0.194000 secs process_iter next() : 0.214000 secs name() : 0.201000 secs process_iter next() : 0.225000 secs name() : 0.194000 secs process_iter next() : 0.155000 secs name() : 0.195000 secs process_iter next() : 0.156000 secs name() : 0.156000 secs process_iter next() : 0.192000 secs name() : 0.195000 secs process_iter next() : 0.167000 secs name() : 0.204000 secs process_iter next() : 0.177000 secs name() : 0.193000 secs process_iter next() : 0.200000 secs name() : 0.178000 secs process_iter next() : 0.228000 secs name() : 0.168000 secs process_iter next() : 0.152000 secs name() : 0.193000 secs process_iter next() : 0.190000 secs name() : 0.155000 secs process_iter next() : 0.192000 secs name() : 0.155000 secs process_iter next() : 0.164000 secs name() : 0.190000 secs process_iter next() : 0.181000 secs name() : 0.158000 secs process_iter next() : 0.195000 secs name() : 0.180000 secs process_iter next() : 0.185000 secs name() : 0.193000 secs process_iter next() : 0.155000 secs name() : 0.188000 secs process_iter next() : 0.164000 secs name() : 0.194000 secs process_iter next() : 0.201000 secs name() : 0.193000 secs process_iter next() : 0.154000 secs name() : 0.199000 secs process_iter next() : 0.153000 secs name() : 0.177000 secs process_iter next() : 0.192000 secs name() : 0.196000 secs process_iter next() : 0.204000 secs name() : 0.167000 secs process_iter next() : 0.173000 secs name() : 0.198000 secs process_iter next() : 0.318000 secs name() : 0.391000 secs process_iter next() : 0.397000 secs name() : 0.367000 secs process_iter next() : 0.171000 secs name() : 0.160000 secs process_iter next() : 0.197000 secs name() : 0.229000 secs process_iter next() : 0.183000 secs name() : 0.199000 secs process_iter next() : 0.180000 secs name() : 0.197000 secs process_iter next() : 0.205000 secs name() : 0.160000 secs process_iter next() : 0.202000 secs name() : 0.168000 secs process_iter next() : 0.168000 secs name() : 0.193000 secs process_iter next() : 0.198000 secs name() : 0.179000 secs process_iter next() : 0.189000 secs name() : 0.179000 secs process_iter next() : 0.196000 secs name() : 0.200000 secs process_iter next() : 0.195000 secs name() : 0.229000 secs process_iter next() : 0.189000 secs name() : 0.195000 secs process_iter next() : 0.192000 secs name() : 0.177000 secs process_iter next() : 0.192000 secs name() : 0.156000 secs process_iter next() : 0.154000 secs name() : 0.234000 secs process_iter next() : 0.192000 secs name() : 0.155000 secs process_iter next() : 0.190000 secs name() : 0.157000 secs process_iter next() : 0.169000 secs name() : 0.194000 secs process_iter next() : 0.171000 secs name() : 0.165000 secs process_iter next() : 0.180000 secs name() : 0.222000 secs process_iter next() : 0.209000 secs name() : 0.197000 secs process_iter next() : 0.158000 secs name() : 0.200000 secs process_iter next() : 0.189000 secs name() : 0.193000 secs process_iter next() : 0.192000 secs name() : 0.161000 secs process_iter next() : 0.191000 secs name() : 0.160000 secs process_iter next() : 0.162000 secs name() : 0.195000 secs process_iter next() : 0.190000 secs name() : 0.204000 secs process_iter next() : 0.353000 secs name() : 0.406000 secs process_iter next() : 0.403000 secs name() : 0.228000 secs process_iter next() : 0.182000 secs name() : 0.200000 secs process_iter next() : 0.167000 secs name() : 0.201000 secs process_iter next() : 0.174000 secs name() : 0.178000 secs process_iter next() : 0.192000 secs name() : 0.187000 secs process_iter next() : 0.183000 secs name() : 0.193000 secs process_iter next() : 0.162000 secs name() : 0.186000 secs process_iter next() : 0.195000 secs name() : 0.209000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.197000 secs name() : 0.155000 secs process_iter next() : 0.180000 secs name() : 0.196000 secs process_iter next() : 0.196000 secs name() : 0.162000 secs process_iter next() : 0.190000 secs name() : 0.171000 secs process_iter next() : 0.202000 secs name() : 0.185000 secs process_iter next() : 0.180000 secs name() : 0.225000 secs process_iter next() : 0.001000 secs name() : 0.000000 secs process_iter next() : 0.165000 secs name() : 0.187000 secs process_iter next() : 0.198000 secs name() : 0.196000 secs process_iter next() : 0.190000 secs name() : 0.175000 secs process_iter next() : 0.166000 secs name() : 0.190000 secs process_iter next() : 0.194000 secs name() : 0.155000 secs process_iter next() : 0.191000 secs name() : 0.154000 secs process_iter next() : 0.152000 secs name() : 0.193000 secs process_iter next() : 0.192000 secs name() : 0.156000 secs process_iter next() : 0.187000 secs name() : 0.155000 secs process_iter next() : 0.155000 secs name() : 0.190000 secs process_iter next() : 0.196000 secs name() : 0.158000 secs process_iter next() : 0.202000 secs name() : 0.201000 secs process_iter next() : 0.199000 secs name() : 0.199000 secs process_iter next() : 0.177000 secs name() : 0.210000 secs process_iter next() : 0.342000 secs name() : 0.432000 secs process_iter next() : 0.367000 secs name() : 0.217000 secs process_iter next() : 0.198000 secs name() : 0.174000 secs process_iter next() : 0.163000 secs name() : 0.182000 secs process_iter next() : 0.156000 secs name() : 0.194000 secs process_iter next() : 0.190000 secs name() : 0.165000 secs process_iter next() : 0.185000 secs name() : 0.162000 secs process_iter next() : 0.152000 secs name() : 0.188000 secs process_iter next() : 0.194000 secs name() : 0.164000 secs process_iter next() : 0.235000 secs name() : 0.179000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.182000 secs name() : 0.198000 secs process_iter next() : 0.165000 secs name() : 0.168000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.173000 secs name() : 0.193000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.188000 secs name() : 0.191000 secs process_iter next() : 0.152000 secs name() : 0.194000 secs process_iter next() : 0.163000 secs name() : 0.172000 secs process_iter next() : 0.215000 secs name() : 0.189000 secs process_iter next() : 0.207000 secs name() : 0.199000 secs process_iter next() : 0.173000 secs name() : 0.192000 secs process_iter next() : 0.199000 secs name() : 0.166000 secs process_iter next() : 0.197000 secs name() : 0.175000 secs process_iter next() : 0.227000 secs name() : 0.193000 secs process_iter next() : 0.152000 secs name() : 0.181000 secs process_iter next() : 0.186000 secs name() : 0.246000 secs process_iter next() : 0.202000 secs name() : 0.188000 secs process_iter next() : 0.197000 secs name() : 0.164000 secs process_iter next() : 0.153000 secs name() : 0.190000 secs process_iter next() : 0.204000 secs name() : 0.174000 secs process_iter next() : 0.207000 secs name() : 0.295000 secs process_iter next() : 0.372000 secs name() : 0.321000 secs process_iter next() : 0.303000 secs name() : 0.193000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.198000 secs name() : 0.176000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.191000 secs name() : 0.187000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.198000 secs name() : 0.187000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.171000 secs name() : 0.206000 secs process_iter next() : 0.176000 secs name() : 0.185000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.206000 secs name() : 0.186000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.181000 secs name() : 0.200000 secs process_iter next() : 0.177000 secs name() : 0.202000 secs process_iter next() : 0.245000 secs name() : 0.207000 secs process_iter next() : 0.251000 secs name() : 0.189000 secs process_iter next() : 0.216000 secs name() : 0.209000 secs process_iter next() : 0.192000 secs name() : 0.176000 secs process_iter next() : 0.175000 secs name() : 0.202000 secs process_iter next() : 0.199000 secs name() : 0.166000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.198000 secs name() : 0.185000 secs process_iter next() : 0.205000 secs name() : 0.209000 secs process_iter next() : 0.191000 secs name() : 0.202000 secs process_iter next() : 0.187000 secs name() : 0.205000 secs process_iter next() : 0.189000 secs name() : 0.166000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.203000 secs name() : 0.177000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.198000 secs name() : 0.206000 secs process_iter next() : 0.179000 secs name() : 0.180000 secs process_iter next() : 0.203000 secs name() : 0.191000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.204000 secs name() : 0.201000 secs process_iter next() : 0.174000 secs name() : 0.195000 secs process_iter next() : 0.000000 secs Process finished with exit code 0 compare this with the output on my laptop process_iter next() : 0.005000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.001000 secs process_iter next() : 0.002000 secs name() : 0.001000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.004000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.003000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.001000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.004000 secs process_iter next() : 0.001000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.004000 secs process_iter next() : 0.002000 secs name() : 0.005000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.003000 secs name() : 0.003000 secs process_iter next() : 0.003000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.005000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.003000 secs name() : 0.002000 secs process_iter next() : 0.001000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.002000 secs process_iter next() : 0.003000 secs name() : 0.004000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.003000 secs name() : 0.003000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.005000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.005000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.002000 secs name() : 0.004000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.002000 secs name() : 0.003000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.001000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.004000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.000000 secs process_iter next() : 0.001000 secs name() : 0.003000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs name() : 0.000000 secs process_iter next() : 0.000000 secs ``` Process finished with exit code 0 Huge differerence, regards Aji.

[giampaolo]

It looks like the first output was run on a Pentium 1 as both process_iter() (which internally calls create_time() and name() are unbelievably slow. Is this an old PC?

[ajikumarmp]

I would not call that a old PC, it has a manufacturing date in 2014 and also has high end hardware [image: Inline image 1] It is a Xeon processor though and run Windows 7, thanks I will try this on other PC's where multiple logons exist and verify the behaviour. regards Aji.

…

On Wed, May 10, 2017 at 2:59 PM, giampaolo ***@***.***> wrote: It looks like the first output was run on a Pentium 1 as both process_iter() (which internally calls create_time() and name() are unbelievably slow. Is this an old PC? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1061 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AbSBS3M0O0ZWUiJX04qMySqiaa1g8TjVks5r4hcygaJpZM4NXGZ_> .

[giampaolo]

I doubt it has to do with multiple users connected.

[ajikumarmp]

Thanks, will come back to you if I find anything unusual in my testing

…

On Fri, May 12, 2017 at 12:24 PM, giampaolo ***@***.***> wrote: Closed #1061 <#1061>. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1061 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AbSBS7GE8oVoHtaxuZTmhK4EQ3gojlKhks5r5JWygaJpZM4NXGZ_> .