Negative memory usage reported when processes use a lot of memory

[giampaolo]

From Willem.J...@gmail.com on May 07, 2013 16:11:23

What steps will reproduce the problem?  
======================================
Call psutil.Process(<pid>).get_memory_info().rss
on a process which uses more than 2GB of memory 

What is the expected output?  
============================
A number larger than 2 billion 

What do you see instead?  
========================
A negative number 

What version of psutil are you using? What Python version?  
==========================================================
* I'm pretty sure I'm using the 32 bit version of psutil 0.7.0
* Python 2.7.3 (default, Apr 10 2012, 23:31:26) 
  [MSC v.1500 32 bit (Intel)] on win32 

On what operating system? Is it 32bit or 64bit version?  
=======================================================
* Windows7, 64 bit 

Please provide any additional information below.  
================================================
I was monitoring the memory usage of a process through time and
got the following numbers:

   12075008
   28250112
   28250112
   28246016
    ...
 1795465216
 1851506688
-2024525824
    ...
 -352120832
  -51957760
         -1
         -1
    ...

while the memory usage increased to over 8GB.

So, to me at least, it looks like an overflow.

I haven't verified if the bug is present in the 64bit version,
but for me it's hard to move to a 64bit Python because of the
(lack of) availability of a 64bit version of some libraries.

Original issue: http://code.google.com/p/psutil/issues/detail?id=374

[giampaolo]

From g.rodola on May 14, 2013 13:53:53

Do you have the possibility to compile psutil and figure whether this happened 
in get_process_memory_info() [1] or get_process_memory_info_2() [2]? 
https://code.google.com/p/psutil/source/browse/psutil/_psutil_mswindows.c?spec=svnc970f35bc9640ac32eb9f09de8c230e7f86a2466&r=73608ce0ff14125fead4dbb93da44233b9dea92f#578

https://code.google.com/p/psutil/source/browse/psutil/_psutil_mswindows.c?spec=svnc970f35bc9640ac32eb9f09de8c230e7f86a2466&r=73608ce0ff14125fead4dbb93da44233b9dea92f#643

[giampaolo]

From g.rodola on July 08, 2013 10:34:29

Labels: -Priority-Medium -64bit -OpSys-Windows7 Priority-High OpSys-Windows

[giampaolo]

From g.rodola on July 09, 2013 03:31:56

Ok, I should have fixed this in revision ea98d1686302 .
If you notice anything weird please reopen.

Status: FixedInHG
Labels: Milestone-1.0.0

[giampaolo]

From g.rodola on July 11, 2013 01:54:35

Status: Fixed