I just did some more testing, and found some rare crashes. Using MESA_GL_VERSION_OVERRIDE=3.1COMPAT seems more stable.
— Johannes Töger Associate Senior Lecturer Cardiac MR Group Department of Clinical Sciences Lund, Clinical Physiology Lund University, Sweden -----Original Message----- From: Ulrich Sibiller <ul...@gmx.de> Sent: Tuesday, June 2, 2020 21:10 To: Johannes Töger <johannes.to...@med.lu.se> Cc: x2go-user@lists.x2go.org Subject: Re: [X2Go-User] Matlab graphics performance when running in x2go Thanks, I have included that in the wiki: https://wiki.x2go.org/doku.php/wiki:development:glx-xlib-workaround#matlab_2019b Uli On Tue, Jun 2, 2020 at 8:56 PM Johannes Töger <johannes.to...@med.lu.se> wrote: > > I finally figured it out! Now I can run Matlab R2019b on Ubuntu 18.04 LTS > with decent graphics performance over x2go, even with transparency using the > Mesa llvmpipe software OpenGL driver. > > Benchmark for a simple scene: > > No transparency: ~40 ms per frame > With transparency: ~58 ms per frmae > > So still some performance penalty for transparency, but much better. > > > HOWTO: > > First install LLVM: sudo apt install llvm-dev > > I downloaded mesa-20.1.0 (latest version right now) and configured it like > this (in the unzipped source directory): > > mkdir build > cd build > meson -D glx=gallium-xlib -D gallium-drivers=swrast -D platforms=x11 > -D dri3=false -D dri-drivers="" -D vulkan-drivers="" -D > buildtype=release -D optimization=3 -Dprefix=/usr/local/mesa-20.1.0/ > > Then I built and installed it as follows: > ninja > sudo ninja install > > Then to make Matlab load the new driver, I needed to modify Matlab's lib > search path: > cp $MATLAB_DIRECTORY/bin/.matlab7rc.sh ~ > > Edit the file ~/.matlab7rc.sh, find the glnxa* section and add > /usr/local/mesa-20.1.0/lib/x86_64-linux-gnu to LDPATH_PREFIX > > Add to your .profile: export MESA_GL_VERSION_OVERRIDE=3.0 > > Seems like anything will work for the version override except for 3.1, but I > didn't debug this further. > > > — > Johannes Töger > > Associate Senior Lecturer > Cardiac MR Group > Department of Clinical Sciences Lund, Clinical Physiology Lund > University, Sweden > > -----Original Message----- > From: Ulrich Sibiller <ul...@gmx.de> > Sent: Wednesday, May 27, 2020 14:29 > To: Johannes Töger <johannes.to...@med.lu.se> > Subject: Re: [X2Go-User] Matlab graphics performance when running in > x2go > > Thanks! > > On Wed, May 27, 2020 at 1:59 PM Johannes Töger <johannes.to...@med.lu.se> > wrote: > > > > OK I see - we only have CUDA cards in those machines to do computations, so > > VirtualGL won't work then. > > > > Maybe I'll try to compile an optimized software Mesa/Gallium -- I'll let > > you know what happens if I find something interesting, so it's documented > > on the mailing list at least. > > > > > > — > > Johannes Töger > > > > Associate Senior Lecturer > > Cardiac MR Group > > Department of Clinical Sciences Lund, Clinical Physiology Lund > > University, Sweden > > > > -----Original Message----- > > From: Ulrich Sibiller <ul...@gmx.de> > > Sent: Wednesday, May 27, 2020 13:20 > > To: Johannes Töger <johannes.to...@med.lu.se> > > Cc: x2go users <x2go-user@lists.x2go.org> > > Subject: Re: [X2Go-User] Matlab graphics performance when running in > > x2go > > > > On Wed, May 27, 2020 at 1:07 PM Johannes Töger <johannes.to...@med.lu.se> > > wrote: > > > > > > Thanks for your quick reply. > > > > > > It turns out that Matlab by default uses an older Mesa software rendering > > > module (17.3) when there is no hardware OpenGL. I tried to compile my own > > > version with additional optimizations and LLVMPipe etc, but Matlab > > > wouldn't accept it. No more time to debug it today, but maybe later. > > > > > > Is there any documentation on using VirtualGL with x2go? I tried to > > > google it, but no luck. > > > > Not that I am aware. I have never checked it out practically. > > Generally you will have to dedicate the graphics hardware to that > > (only) session which might make it a no-go, depending on your setup. > > > > Uli > _______________________________________________ > x2go-user mailing list > x2go-user@lists.x2go.org > https://lists.x2go.org/listinfo/x2go-user _______________________________________________ x2go-user mailing list x2go-user@lists.x2go.org https://lists.x2go.org/listinfo/x2go-user
