I removed all calls to threads and swapped Gdk.threads_add_timeout to Glib.timeout_add (See attached. However if I comment the call to self.canvas.draw(), the
python memory utilisation sits at 30.8Mb.
from gi.repository import Gtk, Gdk, GLib
from matplotlib.figure import Figure
Tell matplotlib to use a GTK canvas for drawing
#from matplotlib.backends.backend_gtk3agg import FigureCanvasGTK3Agg as FigureCanvas
from matplotlib.backends.backend_gtk3cairo import FigureCanvasGTK3Cairo as FigureCanvas
Application Class
class pyMatPlotLibTest(object):
def update_gui(self):
y = [self.index] * 1024
self.index += 1
if self.index > 1024: self.index = 0
#Gdk.threads_enter()
self.line.set_ydata(y)
self.axes.set_title("%d" % self.index)
self.canvas.draw()
#Gdk.threads_leave()
return True
def init(self):
self.index = 0
self.x = range(1024)
Initialise the threads system and allow threads to work with GTK
#GLib.threads_init()
Draw scope
self.figure = Figure(dpi=100)
self.canvas = FigureCanvas(self.figure) # a Gtk.DrawingArea
#self.widget.alignment_ScopeDisplay.add(self.canvas)
Draw initial scope
self.axes = self.figure.add_subplot(111)
self.line, = self.axes.plot(self.x, [0]* 1024)
self.axes.set_title(“None”)
self.axes.set_xbound(0.0, 1024)
self.axes.set_ybound(-16, 1040)
self.window_main = Gtk.Window(title=“pyMatPlotLibTest”)
self.window_main.connect(“destroy”, lambda x: Gtk.main_quit())
self.window_main.add(self.canvas)
self.window_main.show_all()
Ticker for the update of the input state monitoring
GLib.timeout_add(10, self.update_gui)
#Gdk.threads_add_timeout(priority = GLib.PRIORITY_DEFAULT_IDLE,
interval = 10, # msec
function = self.update_gui)
Gtk.main()
if name == “main”:
gui = pyMatPlotLibTest()
On Behalf Of Benjamin Root
···
I take it that it doesn’t happen using the GTK3Agg backend? What about the threading portion? Does it happen if you take the threading out?
Ben Root
On Tue, May 26, 2015 at 8:23 AM, David <dhughes@…4672…> wrote:
Hi, I seem to have a memory leak while generating a ‘live’ plot display. This wasn’t the case for GTK2, but the example below is consuming ~800k/second (Matplotlib 1.4.3, PyGI aio-3.14.0_rev18, Windows 7 x64, python 3.4.3). I have checked
the garbage collector but it doesn’t show anything interesting (no massive incrementing count of uncollected items). Anyway, I would be very grateful if somebody could confirm and/or fix this (or tell me what I’m doing wrong). Many thanks David Code below:
from gi.repository import Gtk, Gdk, GLib
from matplotlib.figure import Figure
# Tell matplotlib to use a GTK canvas for drawing
#from matplotlib.backends.backend_gtk3agg import FigureCanvasGTK3Agg as FigureCanvas
from matplotlib.backends.backend_gtk3cairo import FigureCanvasGTK3Cairo as FigureCanvas
Application Class
class pyMatPlotLibTest(object):
def update_gui(self):
y = [self.index] * 1024
self.index += 1
if self.index > 1024: self.index = 0
Gdk.threads_enter()
self.line.set_ydata(y)
self.axes.set_title("%d" % self.index)
self.canvas.draw()
Gdk.threads_leave()
return True
def __init__(self):
self.index = 0
self.x = range(1024)
# Initialise the threads system and allow threads to work with GTK
GLib.threads_init()
Draw scope
self.figure = Figure(dpi=100)
self.canvas = FigureCanvas(self.figure) # a Gtk.DrawingArea
#self.widget.alignment_ScopeDisplay.add(self.canvas)
# Draw initial scope
self.axes = self.figure.add_subplot(111)
self.line, = self.axes.plot(self.x, [0]* 1024)
self.axes.set_title(“None”)
self.axes.set_xbound(0.0, 1024)
self.axes.set_ybound(-16, 1040)
self.window_main = Gtk.Window(title=“pyMatPlotLibTest”)
self.window_main.connect("destroy", lambda x: Gtk.main_quit())
self.window_main.add(self.canvas)
self.window_main.show_all()
# Ticker for the update of the input state monitoring
Gdk.threads_add_timeout(priority = GLib.PRIORITY_DEFAULT_IDLE,
interval = 10, # msec
function = self.update_gui)
Gtk.main()
if name == “main”:
gui = pyMatPlotLibTest()
---
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matplotlib.backends.backend_gtk3cairo memory leak](http://matplotlib.1069221.n5.nabble.com/matplotlib-backends-backend-gtk3cairo-memory-leak-tp45614.html)
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