Re: [Dri-devel] reproducible multiple glx context bug

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Am Freitag, 25. Oktober 2002 22:22 schrieb Brian Paul:
> Charl P. Botha wrote:
> > Dear list,
> >
> > This bug has so far been reproduced on my M7 (mobile 7500) laptop with
> > DRI CVS as well as on a TiBook (i.e. PPC) with 7500 (thanks Wouter).
> >
> > Download http://cpbotha.net/thingies/glthreads.c and compile it with
> > something like:
> > gcc -I../include -O3 -ansi -pedantic -fPIC -ffast-math -D_SVID_SOURCE \
> > -D_BSD_SOURCE -DUSE_XSHM -DPTHREADS -I/usr/X11R6/include glthreads.c \
> > -L../lib -lglut -lGLU -lGL -lm -o glthreads
> >
> > This is an example from the mesademos I've modified to show the bug.  Y=
ou
> > have to run with RADEON_TCL_FORCE_DISABLE=3D1 (if you have TCL hardware)
> > else you will get the VTXFMT assert bug or your X will lock up.  This is
> > the case with the stock glthreads too.  If you have an R200, try with
> > R200_NO_TCL=3D1
> >
> > Run glthreads with something like: glthreads -n 5
> >
> > Focus one of the windows and press any key.  This will terminate the
> > thread, wait for it and then kill the glxcontext and window (my
> > modification).  At this point, if you're using a radeon, you should see:
> > drmCmdBuffer: -22 and the app will terminate.
> >
> > Does anyone have any ideas on this?
>
> I found the problem.  The call to R200_FIREVERTICES() was in the wrong
> place (as someone suggested).  It's supposed to be near the top.  I'll
> check in the fix for both the radeon and r200 driver soon.
>
> glthreads seems to work fine now (with or without h/w tcl) on the r200.

This is true got it running with n=3D100,150,200 ;-)
=46elix fix cured it.

But all my threaded VTK apps (VTXFMT) crash.
Sometimes it is halfway running, now.
Two windows come up, one sometimes with content, the other empty white=20
colored, sometimes both only white.
Most wanted bug fix, please ;-)

VTK/bin> ./TaskParallelism
r200CreateScreen
r200CreateScreen
r200_makeX86Normal3fv/197 CVAL 0 OFFSET 14 VAL 41bd16e0
r200_makeX86Normal3fv/198 CVAL 4 OFFSET 20 VAL 41bd16e4
r200_makeX86Normal3fv/199 CVAL 8 OFFSET 25 VAL 41bd16e8
r200_makeX86Normal3fv done
Speicherschutzverletzung
VTK/bin> unlimit coredumpsize
VTK/bin> ./TaskParallelism
r200CreateScreen
r200_makeX86Normal3fv/197 CVAL 0 OFFSET 14 VAL 41bd16e0
r200_makeX86Normal3fv/198 CVAL 4 OFFSET 20 VAL 41bd16e4
r200_makeX86Normal3fv/199 CVAL 8 OFFSET 25 VAL 41bd16e8
r200_makeX86Normal3fv done
r200CreateScreen
TaskParallelism: r200_vtxfmt.c:925: r200FlushVertices: Assertion `vb.contex=
t=20
=3D=3D ctx' failed.
Abbruch (core dumped)

[-]
Reading symbols from /lib/libm.so.6...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /usr/lib/libstdc++-libc6.2-2.so.3...done.
Loaded symbols for /usr/lib/libstdc++-libc6.2-2.so.3
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/X11R6/lib/X11/locale/lib/common/xlcDef.so.2...don=
e.
Loaded symbols for /usr/X11R6/lib/X11/locale/lib/common/xlcDef.so.2
Reading symbols from /usr/X11R6/lib/modules/dri/r200_dri.so...done.
Loaded symbols for /usr/X11R6/lib/modules/dri/r200_dri.so
#0  0x417d2701 in kill () from /lib/libc.so.6
(gdb) bt
#0  0x417d2701 in kill () from /lib/libc.so.6
#1  0x4003489a in pthread_kill () from /lib/libpthread.so.0
#2  0x40034d92 in raise () from /lib/libpthread.so.0
#3  0x417d3a23 in abort () from /lib/libc.so.6
#4  0x417cd0ea in __assert_fail () from /lib/libc.so.6
#5  0x41b8bb65 in r200FlushVertices () from=20
/usr/X11R6/lib/modules/dri/r200_dri.so
#6  0x4023a658 in vtkOpenGLRenderWindow::SetPixelData ()
   from /opt/VTK/V4.0/VTK/lib/libvtkRendering.so
#7  0x40082fbc in vtkCompositeManager::Composite ()
   from /opt/VTK/V4.0/VTK/lib/libvtkParallel.so
#8  0x40081bf9 in vtkCompositeManager::EndRender ()
   from /opt/VTK/V4.0/VTK/lib/libvtkParallel.so
#9  0x4007f899 in vtkCompositeManagerEndRender ()
   from /opt/VTK/V4.0/VTK/lib/libvtkParallel.so
#10 0x4154a1dd in vtkCallbackCommand::Execute ()
   from /opt/VTK/V4.0/VTK/lib/libvtkCommon.so
#11 0x415a1416 in vtkSubjectHelper::InvokeEvent ()
   from /opt/VTK/V4.0/VTK/lib/libvtkCommon.so
#12 0x415a1762 in vtkObject::InvokeEvent () from=20
/opt/VTK/V4.0/VTK/lib/libvtkCommon.so
#13 0x401ff32b in vtkRenderWindow::Render () from=20
/opt/VTK/V4.0/VTK/lib/libvtkRendering.so
#14 0x4024884a in vtkXOpenGLRenderWindow::Render ()
   from /opt/VTK/V4.0/VTK/lib/libvtkRendering.so
#15 0x4022d81e in vtkXRenderWindowInteractorCallback ()
   from /opt/VTK/V4.0/VTK/lib/libvtkRendering.so
#16 0x40fc7f3e in XtDispatchEventToWidget () from /usr/X11R6/lib/libXt.so.6
#17 0x40fc8832 in _XtDefaultDispatcher () from /usr/X11R6/lib/libXt.so.6
#18 0x40fc8bb9 in XtDispatchEvent () from /usr/X11R6/lib/libXt.so.6
#19 0x4022c352 in vtkXRenderWindowInteractor::Start ()
   from /opt/VTK/V4.0/VTK/lib/libvtkRendering.so
#20 0x40081152 in vtkCompositeManager::StartInteractor ()
   from /opt/VTK/V4.0/VTK/lib/libvtkParallel.so
#21 0x080496d0 in process ()
#22 0x400b64a2 in vtkThreadedController::Start ()
   from /opt/VTK/V4.0/VTK/lib/libvtkParallel.so
#23 0x400b6160 in vtkThreadedController::vtkThreadedControllerStart ()
   from /opt/VTK/V4.0/VTK/lib/libvtkParallel.so
#24 0x4159e650 in vtkMultiThreader::SingleMethodExecute ()
   from /opt/VTK/V4.0/VTK/lib/libvtkCommon.so
#25 0x400b6800 in vtkThreadedController::SingleMethodExecute ()
   from /opt/VTK/V4.0/VTK/lib/libvtkParallel.so
#26 0x08049776 in main ()
#27 0x417c27d1 in __libc_start_main () from /lib/libc.so.6

I'll try viewperf later when I have the 2.5.44-mm5 kernel up and running.

Cheers,
	Dieter