Re: linux-c7 and opengl apps?
On Sat, Oct 6, 2018 at 1:39 PM Greg V wrote:
>
>
> On Fri, Oct 5, 2018 at 11:21 PM, Theron wrote:
> > % /compat/linux/opt/VirtualGL/bin/glxinfo | grep OpenGL
> > libGL error: MESA-LOADER: failed to retrieve device information
>
> Do you have linsysfs mounted?
>
> Try reading /compat/linux/sys/class/drm/card0/device/uevent.
>
> Mesa won't retrieve device information without linsysfs.
> I wrote the linsysfs patch that exposed the info there so that recent
> Mesa would work :)
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222375
> (Wow, that was a year ago… interesting note from there: you might
> need to set LIBGL_DRI3_DISABLE=1 for Linux apps)
>
Thank you Greg! LIBGL_DRI3_DISABLE=1 was it for me! Now I can run OpenGL
apps with linux-c7 :)
>
> Also, what's with the "/opt/VirtualGL"? Are you using mesa from
> linux-c7 or something… weird?
>
> > This problem has existed forever. I am not sure it is actually a
> > fault in Linux emulation, as these very same symptoms ("failed to
> > retrieve device information" message, console freeze) existed back in
> > FreeBSDDesktop/freebsd-base-graphics days when attempting to run
> > purely FreeBSD OpenGL apps. At the time the workaround was a patch
> > to Mesa's GPU detection; the underlying kernel problem wasn't
> > addressed.
>
> There was a somewhat related issue (but not the same one, FreeBSD and
> Linux versions of mesa/libdrm use different mechanisms to get device
> info).
> Mostly affected Wayland-EGL clients — they would try to access
> /dev/dri/card408 instead of /dev/dri/card0, fail to get info and fall
> back to software rendering.
> I fixed it a while ago:
>
> https://gitlab.freedesktop.org/mesa/mesa/commit/db8519a369261cdedda50852facc45616d4eba28
>
> But I never saw console freezes when Mesa couldn't properly detect the
> GPU o_0
>
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Re: linux-c7 and opengl apps?
On Fri, Oct 5, 2018 at 11:21 PM, Theron wrote:
% /compat/linux/opt/VirtualGL/bin/glxinfo | grep OpenGL
libGL error: MESA-LOADER: failed to retrieve device information
Do you have linsysfs mounted?
Try reading /compat/linux/sys/class/drm/card0/device/uevent.
Mesa won't retrieve device information without linsysfs.
I wrote the linsysfs patch that exposed the info there so that recent
Mesa would work :)
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222375
(Wow, that was a year ago… interesting note from there: you might
need to set LIBGL_DRI3_DISABLE=1 for Linux apps)
Also, what's with the "/opt/VirtualGL"? Are you using mesa from
linux-c7 or something… weird?
This problem has existed forever. I am not sure it is actually a
fault in Linux emulation, as these very same symptoms ("failed to
retrieve device information" message, console freeze) existed back in
FreeBSDDesktop/freebsd-base-graphics days when attempting to run
purely FreeBSD OpenGL apps. At the time the workaround was a patch
to Mesa's GPU detection; the underlying kernel problem wasn't
addressed.
There was a somewhat related issue (but not the same one, FreeBSD and
Linux versions of mesa/libdrm use different mechanisms to get device
info).
Mostly affected Wayland-EGL clients — they would try to access
/dev/dri/card408 instead of /dev/dri/card0, fail to get info and fall
back to software rendering.
I fixed it a while ago:
https://gitlab.freedesktop.org/mesa/mesa/commit/db8519a369261cdedda50852facc45616d4eba28
But I never saw console freezes when Mesa couldn't properly detect the
GPU o_0
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Re: linux-c7 and opengl apps?
On Wed, Oct 3, 2018 at 2:39 AM Johannes Lundberg wrote: > Hi > > Have anyone successfully run opengl apps with linux-c7? > > Linux opengl apps works great with linux-c6 on gpu < kabylake but > linux-c6-dri does not include support for kabylake gpus. > Linux glxinfo in c7 show support for hardware rendering on kabylake but any > attempt to run an opengl app results in application seg fault or other > crash (I believe this is also the case with skylake gpus on linux-c7). > > Is there any way to run gdb on linux apps/core dumps? > I have a patch to generate core dumps that a Linux gdb can decode. It has limited testing, but I'm happy to rebase + share it with you. --chuck ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: linux-c7 and opengl apps?
On 10/3/18 5:36 AM, Johannes Lundberg wrote:
Hi
Have anyone successfully run opengl apps with linux-c7?
Linux opengl apps works great with linux-c6 on gpu < kabylake but
linux-c6-dri does not include support for kabylake gpus.
Linux glxinfo in c7 show support for hardware rendering on kabylake but any
attempt to run an opengl app results in application seg fault or other
crash (I believe this is also the case with skylake gpus on linux-c7).
Is there any way to run gdb on linux apps/core dumps?
/Johannes
___
On an Intel Skylake graphics system it has never worked:
% /compat/linux/opt/VirtualGL/bin/glxinfo | grep OpenGL
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: Version 4 or later of flush extension not found
libGL error: failed to load driver: i915
libGL error: MESA-LOADER: failed to retrieve device information
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Unknown Intel Chipset
OpenGL version string: 1.3 Mesa 17.0.1
Running any Linux OpenGL app which attempts to do actual rendering
results in an indefinite freeze of the console: graphical output is
frozen, and system does not respond to keyboard (Ctrl-Alt-Del or
Ctrl-Alt-F1). However, the system continues to run (tested with ssh).
Sometimes, after several minutes, the console recovers, the OpenGL user
segfaults, and the system returns to normal (until the next attempt to
use an OpenGL Linux app).
This problem has existed forever. I am not sure it is actually a fault
in Linux emulation, as these very same symptoms ("failed to retrieve
device information" message, console freeze) existed back in
FreeBSDDesktop/freebsd-base-graphics days when attempting to run purely
FreeBSD OpenGL apps. At the time the workaround was a patch to Mesa's
GPU detection; the underlying kernel problem wasn't addressed.
Where would I begin to investigate the problem, in order to fix it
and/or to decide who's bug it is? Unless there is something simpler to
try, I may have to dig up those old Mesa patches and see whether a
non-Linux binary can be made to trigger the same symptom.
By design, is it considered acceptable that any member of the "video"
group has permission to destroy functionality of the graphics
subsystem? Is this a bug in the general case, or an accepted technical
limitation?
Copying to x11@.
Theron
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Re: linux-c7 and opengl apps?
On Fri, Oct 5, 2018 at 11:50 PM Greg V wrote: > > > On Wed, Oct 3, 2018 at 12:36 PM, Johannes Lundberg > wrote: > > Hi > > > > Have anyone successfully run opengl apps with linux-c7? > > > > Linux opengl apps works great with linux-c6 on gpu < kabylake but > > linux-c6-dri does not include support for kabylake gpus. > > Linux glxinfo in c7 show support for hardware rendering on kabylake > > but any > > attempt to run an opengl app results in application seg fault or other > > crash (I believe this is also the case with skylake gpus on linux-c7). > > On AMD Polaris: everything used to work in an ubuntu 16.04 chroot > (currently having "can't open display :0" with that, probably > forgetting something). > > Trying Unigine Heaven with c7, segfaults right now. glxinfo shows > everything correctly though. > > > Is there any way to run gdb on linux apps/core dumps? > > There was a BSDCan talk that mentioned some gdb solutions: > > https://www.youtube.com/watch?v=9N3NrPeCJpk > > https://www.bsdcan.org/2018/schedule/attachments/473_linuxulator-notes-bsdcan2018.txt > > ___ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org" > In the video, you guys run into issues w/ debugging core dumps. While this doesn't make any sense, you guys are free to write your own Linux core dump disassembler. Core dumps are created this way: https://github.com/torvalds/linux/blob/master/fs/binfmt_elf.c#L97 The elf format is documented online. Once that's done you have all the registers, heap, stack, data and you can play from there. Writing a disassembler should be childs play, shouldn't it? Best ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: linux-c7 and opengl apps?
On Wed, Oct 3, 2018 at 12:36 PM, Johannes Lundberg wrote: Hi Have anyone successfully run opengl apps with linux-c7? Linux opengl apps works great with linux-c6 on gpu < kabylake but linux-c6-dri does not include support for kabylake gpus. Linux glxinfo in c7 show support for hardware rendering on kabylake but any attempt to run an opengl app results in application seg fault or other crash (I believe this is also the case with skylake gpus on linux-c7). On AMD Polaris: everything used to work in an ubuntu 16.04 chroot (currently having "can't open display :0" with that, probably forgetting something). Trying Unigine Heaven with c7, segfaults right now. glxinfo shows everything correctly though. Is there any way to run gdb on linux apps/core dumps? There was a BSDCan talk that mentioned some gdb solutions: https://www.youtube.com/watch?v=9N3NrPeCJpk https://www.bsdcan.org/2018/schedule/attachments/473_linuxulator-notes-bsdcan2018.txt ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: linux-c7 and opengl apps?
On Wed, 3 Oct 2018 10:36:51 +0100 Johannes Lundberg wrote: > Have anyone successfully run opengl apps with linux-c7? > > Linux opengl apps works great with linux-c6 on gpu < kabylake but > linux-c6-dri does not include support for kabylake gpus. > Linux glxinfo in c7 show support for hardware rendering on kabylake but any > attempt to run an opengl app results in application seg fault or other > crash (I believe this is also the case with skylake gpus on linux-c7). The only non-nvidia hardware I have is an old r300 card and that works under linux c7 emulation. Do you have linsysfs mounted on /compat/linux/sys? ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: linux-c7 and opengl apps?
On Wed, Oct 3, 2018 at 5:40 PM Johannes Lundberg wrote: > Hi > > Have anyone successfully run opengl apps with linux-c7? > > Linux opengl apps works great with linux-c6 on gpu < kabylake but > linux-c6-dri does not include support for kabylake gpus. > Linux glxinfo in c7 show support for hardware rendering on kabylake but any > attempt to run an opengl app results in application seg fault or other > crash (I believe this is also the case with skylake gpus on linux-c7). > > Is there any way to run gdb on linux apps/core dumps? > > /Johannes > ___ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org" > Highly unlikely since the Linux kernel memory model is pretty different than FreeBSD especially concerning graphics. Linux kernel graphics will have to use dma regions or the low kernel memory while most other stuff hangs out in the high kernel memory. Since the graphics drivers have to have contiguous memory regions that should not be swapped out, if linuxkpi doesn't manage these complexities you'll continue to random failures especially around sleep to wake, context switching and power management. It can be fixed though, you'll just need to port the entire Linux memory architecture to FreeBSD and that's as it stands right now. Don't look into rma, numa, hhm, huge pages and all the other lovely memory features that is currently mainline or about to get merged into mainline. Good luck with that though. Best, Owen ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
linux-c7 and opengl apps?
Hi Have anyone successfully run opengl apps with linux-c7? Linux opengl apps works great with linux-c6 on gpu < kabylake but linux-c6-dri does not include support for kabylake gpus. Linux glxinfo in c7 show support for hardware rendering on kabylake but any attempt to run an opengl app results in application seg fault or other crash (I believe this is also the case with skylake gpus on linux-c7). Is there any way to run gdb on linux apps/core dumps? /Johannes ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
