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()
From: ben.v.r...@gmail.com [mailto:ben.v.r...@gmail.com] On Behalf Of Benjamin
Root
Sent: 26 May 2015 14:53
To: David Hughes
Cc: Matplotlib Users
Subject: Re: [Matplotlib-users] matplotlib.backends.backend_gtk3cairo memory
leak
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
<dhug...@rapiscansystems.com<mailto:dhug...@rapiscansystems.com>> 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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