How to monitor CPU and RAM usage using Python

[soulofstar]

I want to monitor the CPU and RAM usage using Python,

Now, I know how to monitor RAM usage by Python

from ctypes import *
from ctypes.wintypes import *
 
class MEMORYSTATUS(Structure):
    _fields_ = [
    ('dwLength', DWORD),
    ('dwMemoryLoad', DWORD),
    ('dwTotalPhys', DWORD),
    ('dwAvailPhys', DWORD),
    ('dwTotalPageFile', DWORD),
    ('dwAvailPageFile', DWORD),
    ('dwTotalVirtual', DWORD),
    ('dwAvailVirtual', DWORD),
    ]
def winmem():
    m = MEMORYSTATUS()
    windll.kernel32.GlobalMemoryStatus(byref(m))
    return m
m = winmem()
print '%d MB physical RAM left.' % (m.dwAvailPhys/1024**2)

But I don't know how to monitor CPU realtime usage, please help me.

And how to monitor CPU and RAM used by one program?

[ghostdog74]

I want to monitor the CPU and RAM usage using Python,

Now, I know how to monitor RAM usage by Python

from ctypes import *
from ctypes.wintypes import *

class MEMORYSTATUS(St ructure):
_fields_ = [
('dwLength', DWORD),
('dwMemoryLoad' , DWORD),
('dwTotalPhys', DWORD),
('dwAvailPhys', DWORD),
('dwTotalPageFi le', DWORD),
('dwAvailPageFi le', DWORD),
('dwTotalVirtua l', DWORD),
('dwAvailVirtua l', DWORD),
]
def winmem():
m = MEMORYSTATUS()
windll.kernel32 .GlobalMemorySt atus(byref(m))
return m
m = winmem()
print '%d MB physical RAM left.' % (m.dwAvailPhys/1024**2)

But I don't know how to monitor CPU realtime usage, please help me.

And how to monitor CPU and RAM used by one program?

while i am not much into ctypes, there's another way, using WMI
check MSDN and here for more.

one example :

>>> import wmi
>>> wm = wmi.WMI()
>>> for j in wm.Win32_PerfFormattedData_PerfOS_Memory(): print j 
 

another eg:

>>> import wmi
>>> wm = wmi.WMI ()
>>> for j in wm.Win32_Processor (): print j
 

[soulofstar]

Now I knew how to monitor CPU and Memory usage via win32pdh, while I don't know how to monitor memory usage of one application.

snippet of code:

mempath = win32pdh.MakeCounterPath((None, "Memory", None, \
                                            None, -1, "Available MBytes"))
query = win32pdh.OpenQuery(None, 0)
counter = win32pdh.AddCounter(query, mempath, 0)
 
win32pdh.CollectQueryData(query)
status, value = win32pdh.GetFormattedCounterValue(counter,
                win32pdh.PDH_FMT_LONG)
 

These code only can monitor the whole availabe memory, I do not know how to change the CounterPath to monitor one certain application's memory usage.

anyone can help me, thanks for your reply

[bartonc]

while i am not much into ctypes, there's another way, using WMI
check MSDN and here for more.

one example :

>>> import wmi
>>> wm = wmi.WMI()
>>> for j in wm.Win32_PerfFormattedData_PerfOS_Memory(): print j 
 

another eg:

>>> import wmi
>>> wm = wmi.WMI ()
>>> for j in wm.Win32_Processor (): print j
 

Great link GD! Would you consider doing an article or code post for one of the sub forums. This is something that I had not heard of. Thanks for the info.

[rahali]

Hi,
I want to use Ctypes to monitor RAM on UNIX, what can i do ?

thanks for your help.

hicham

[rahali]

i think that ctypes is not supported under unix platforms. i cant found, how to get informations about memory, and i think for each platforme, it must use the apropriate command:
exp :
linux ==> use /proc/meminfo
unix ==> use for each platforme its command

i want to use one methode to get memory informations for all platforms, please if any one can help,

thanks