[Octave-bug-tracker] [bug #60979] Memory space used per GNU octave increases inexplicably

[Simon Morisset]

URL:
  <https://savannah.gnu.org/bugs/?60979>

                 Summary: Memory space used per GNU octave increases
inexplicably
                 Project: GNU Octave
            Submitted by: simon_morisset
            Submitted on: mar. 27 juil. 2021 14:34:13 UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Performance
                  Status: None
             Assigned to: None
         Originator Name: Simon Morisset
        Originator Email: 
             Open/Closed: Open
                 Release: 6.3.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

    _______________________________________________________

Details:

I run scripts which read data from an udp port and then make several figures
in real time every seconds. The code works very well. However, the memory
space used per Octave when these scripts are running, increase continusly
while the size of the variables remains unchanged. I isolated two small
examples which reproduce this increasing of memory space (looking memory from
windows in task manager):

% Example #1
-- fig = figure;
-- while 1
--         refreshdata(fig)
--         pause(0.1)
-- end

% Example #2
-- s=udp('10.0.0.16', 10001,'localport',10000); % with incoming data in this
port
-- while 1
--         fread(s,s.bytesavailable);
--         pause(0.1)
-- end
-- udp_close(s);

When one of these two example is running, the memory increases step by step.
If I let these codes running several hours or days, they saturate the windows
memory and Octave freezes.

If I stop these codes before freezing and I clear all the Octave space (clear
all, clear classes, clear java, clc), the memory does not reduce. The only
solution is to restart Octave to comeback to a normal memory level (~50Mo)

First question: Why the memory increases when no variables are increasing?
Second question: How to flush the full octave memory without restart it?

Thank you for the support.
Regards

Windows 10
Ocatve 6.0.1 and 6.0.3





    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?60979>

_______________________________________________
  Message posté via Savannah
  https://savannah.gnu.org/