<div dir="ltr">Hello list,<div><br></div><div>I am working on a complex Qt/OpenGL Application.</div><div>Xorg starts leaking in VRAM when i'm using the application and never release the memory, until I restart X of course.</div><div><br></div><div><div><font face="monospace, monospace">$ nvidia-smi</font></div><div><font face="monospace, monospace">+-----------------------------------------------------------------------------+</font></div><div><font face="monospace, monospace">| NVIDIA-SMI 390.48                 Driver Version: 390.48                    |</font></div><div><font face="monospace, monospace">|-------------------------------+----------------------+----------------------+</font></div><div><font face="monospace, monospace">| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |</font></div><div><font face="monospace, monospace">| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |</font></div><div><font face="monospace, monospace">|===============================+======================+======================|</font></div><div><font face="monospace, monospace">|   0  GeForce GTX 105...  Off  | 00000000:01:00.0 Off |                  N/A |</font></div><div><font face="monospace, monospace">| N/A   46C    P8     4W /  N/A |     50MiB /  4040MiB |      0%      Default |</font></div><div><font face="monospace, monospace">+-------------------------------+----------------------+----------------------+</font></div><div><font face="monospace, monospace">                                                                               </font></div><div><font face="monospace, monospace">+-----------------------------------------------------------------------------+</font></div><div><font face="monospace, monospace">| Processes:                                                       GPU Memory |</font></div><div><font face="monospace, monospace">|  GPU       PID   Type   Process name                             Usage      |</font></div><div><font face="monospace, monospace">|=============================================================================|</font></div><div><font face="monospace, monospace">|    0     29628      G   /usr/lib/xorg-server/Xorg                     47MiB |</font></div><div><font face="monospace, monospace">+-----------------------------------------------------------------------------+</font></div><div>$ ./myOpenGLQtBasedApp ... doing graphic stuff then exiting</div><div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">$ nvidia-smi</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">+-----------------------------------------------------------------------------+</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">| NVIDIA-SMI 390.48                 Driver Version: 390.48                    |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">|-------------------------------+----------------------+----------------------+</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">|===============================+======================+======================|</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">|   0  GeForce GTX 105...  Off  | 00000000:01:00.0 Off |                  N/A |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">| N/A   46C    P8     4W /  N/A |    110MiB /  4040MiB |      0%      Default |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">+-------------------------------+----------------------+----------------------+</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">                                                                               </font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">+-----------------------------------------------------------------------------+</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">| Processes:                                                       GPU Memory |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">|  GPU       PID   Type   Process name                             Usage      |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">|=============================================================================|</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">|    0     29628      G   /usr/lib/xorg-server/Xorg                    107MiB |</font></div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><font face="monospace, monospace">+-----------------------------------------------------------------------------+</font></div><div><br></div><div>The version of Xorg does not matter, tested a few.</div><div>The version of the driver does not matter, as long as it's nvidia, tested 340, 384, 390</div><div>The linux distribution does not matter, tested Ubuntu 16.04, 18.04, fedora</div><div>The de does not matter, tested Unity, Gnome-shell, Xfce, Lxde + Compton, Openbox + compton</div><div>The compositor used does not matter, <b>but the leak disappear without a composito</b>r.</div><div>I did not test Wayland.</div><div><br></div>Do you know what could cause this behavior ? </div><div>Could this be a Xorg bug ?</div><div>If not, what could, in our code create this behavior ?</div><div><br></div><div>Best regards,<br class="gmail-Apple-interchange-newline"><br></div><div><div class="gmail_signature"><div dir="ltr">Mathieu Westphal<br></div></div></div>
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