THREADS use 100 % CPU all the time

[matthiasjanes]

Hi all,

I have a application where I use different threads. actually all is
working - BUT I just discovered that the CPU is always 100 % [/
b]used.

on the 32-bit machine athlon XP, as well as on the amd 64-bit AMD
Athlon(TM) 64 X2 Dual-Core.

I have to admit I'm not used to threads. I actually use a thirdparty
scheduler http://www.webwareforpython.org/TaskKit/Docs/Source/ Docs/TaskKit.Scheduler.html
but I checked and a very simple exampe with threading gives me also
all the time 100% CPU.

import threading, time

class TestThread ( threading.Thread ):
def run ( self ):
    print 'TEST'

t = TestThread()
t.start()


while (True):
    pass

Does anyone know how to run this without consuming all CPU.

regards,

MJ

 

[=?ISO-8859-1?Q?Thomas_Kr=FCger?=]

while (True):
pass

Does anyone know how to run this without consuming all CPU.

Your while loop is taking all the CPU time.

Thomas

 

[A.B., Khalid]

Hi all,

I have a application where I use different threads. actually all is
working - BUT I just discovered that the CPU is always 100 % [/
b]used.

on the 32-bit machine athlon XP, as well as on the amd 64-bit AMD
Athlon(TM) 64 X2 Dual-Core.

I have to admit I'm not used to threads. I actually use a thirdparty
scheduler http://www.webwareforpython.org/TaskKit/Docs/Source/ Docs/TaskKit.Scheduler.html
but I checked and a very simple exampe with threading gives me also
all the time 100% CPU.

import threading, time

class TestThread ( threading.Thread ):
def run ( self ):
print 'TEST'

t = TestThread()
t.start()

while (True):
pass

Does anyone know how to run this without consuming all CPU.

regards,

MJ

You need your program to sleep a while to allow a switch to other
tasks. Like so:

###
import threading, time

class TestThread(threading.Thread):
def run(self):
print 'TEST'

t = TestThread()
t.start()

while (True):
time.sleep(0.01)
pass
###


Regards

 

[matthiasjanes]

Hi all,

I have a application where I use different threads. actually all is
working - BUT I just discovered that the CPU is always 100 % [/
b]used.

on the 32-bit machine athlon XP, as well as on the amd 64-bit AMD
Athlon(TM) 64 X2 Dual-Core.

I have to admit I'm not used to threads. I actually use a thirdparty
scheduler http://www.webwareforpython.org/TaskKit/Docs/Source/ Docs/TaskKit.Scheduler.html
but I checked and a very simple exampe with threading gives me also
all the time 100% CPU.

[/QUOTE]

import threading, time[/QUOTE]
[QUOTE]
class TestThread ( threading.Thread ):
def run ( self ):
print 'TEST'[/QUOTE]
[QUOTE]
t = TestThread()
t.start()[/QUOTE]
[QUOTE]
while (True):
pass [QUOTE]

Does anyone know how to run this without consuming all CPU.

regards,

MJ

You need your program to sleep a while to allow a switch to other
tasks. Like so:

###
import threading, time

class TestThread(threading.Thread):
def run(self):
print 'TEST'

t = TestThread()
t.start()

while (True):
time.sleep(0.01)
pass
###

Regards

Thanks a lot both of you.

MJ

 

[Gabriel Genellina]

On Apr 11, 2:38 am, (e-mail address removed) wrote:

I have a application where I use different threads. actually all is
working - BUT I just discovered that the CPU is always 100 % [/
b]used.

You need your program to sleep a while to allow a switch to other
tasks. Like so:

t = TestThread()
t.start()

while (True):
time.sleep(0.01)
pass

If all you want is to wait until the thread finishes, use t.join() instead
of that infinite loop.