https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #2 from sarnex commendsarnex@gmail.com --- Hi smoki. I am on a Radeon HD 7950(TAHITI). If I try the trace from https://bugs.freedesktop.org/show_bug.cgi?id=67887, I DO see the same graphical glitches that I get.

Here an apitrace I just took: https://idontevenlift.no-ip.org/sarnex_dota_linux.trace.xz

The other apitrace is too large, I'll try it tomorrow.

Thanks, sarnex

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #4 from Tom Stellard tstellar@gmail.com --- (In reply to sarnex from comment #0)

Hi guys. If I use LLVM git, I get these graphical glitches in Dota 2 native.

https://i.imgur.com/I4vyWFt.jpg

The bug has been bisected to LLVM: 51a3c27d6e0c66cc8d2d1da8e9205fec7b74ca5c R600/SI: Define a schedule model and enable the generic machine scheduler

I'm using Mesa git, Kernel 3.18.5 and Linux Mint.

Thanks alot,

sarnex

Can you run the game with the environment variable: R600_DEBUG=ps,vs,gs and post the output.

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #6 from Tom Stellard tstellar@gmail.com --- (In reply to sarnex from comment #5)

(In reply to Tom Stellard from comment #4)

...

(In reply to sarnex from comment #0)

...

Hi guys. If I use LLVM git, I get these graphical glitches in Dota 2 native.

https://i.imgur.com/I4vyWFt.jpg

The bug has been bisected to LLVM: 51a3c27d6e0c66cc8d2d1da8e9205fec7b74ca5c R600/SI: Define a schedule model and enable the generic machine scheduler

I'm using Mesa git, Kernel 3.18.5 and Linux Mint.

Thanks alot,

sarnex

Can you run the game with the environment variable: R600_DEBUG=ps,vs,gs and post the output.

Hi Tom, thanks for replying.

The log is here, since it's too big to be an attachment. Skip to near the end to see the in-game bugged time, the beginning is mostly the menu.

Log: http://paste.ubuntu.com/10075950/

Thanks, would you also be able to get a dump using the last good commit.

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #8 from Daniel Scharrer daniel@constexpr.org --- The Mesa patch from bug 88561 comment 6 fixes this for me - at least the glitches with the posted apitrace.

https://bugs.freedesktop.org/show_bug.cgi?id=88978

Daniel Scharrer daniel@constexpr.org changed:

What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://bugs.freedesktop.or | |g/show_bug.cgi?id=88561

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #11 from Daniel Scharrer daniel@constexpr.org --- Created attachment 115995 --> https://bugs.freedesktop.org/attachment.cgi?id=115995&action=edit patch to disable the machine scheduler for SI

I can confirm that these these glitches are still present on current LLVM + Mesa git with a 7950 (TAHITI).

Glitches happen in various games with different engines (Source, Unity, …). Here is a trace of The Talos Principle (first posted in bug #88561 comment 9), that still produces more than just occasional glitches (even with Marek's patch): http://constexpr.org/tmp/Talos-radeonsi.3.trace.xz (147 MiB)

Like sarnex, I have bisected this to LLVM 51a3c27d6e0c66cc8d2d1da8e9205fec7b74ca5c (r227461). I had to revert b8797a7 and a99a16a in current Mesa git for it to build against that LLVM revision.

Some Source engine games (L4D2, Nuclear Dawn, maybe others) don't just produce graphical glitches but also frequently lock up the GPU since a later change to the machine scheduler (r233366) - see bug #90378.

Disabling the machine scheduler for SI on current LLVM (see attached patch) also fixes both the lockups an graphical glitches.

Additionally, using R600_DEBUG=switch_on_eop with unpatched LLVM also works around both the graphical glitches and and GPU lockups.

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #13 from Daniel Scharrer daniel@constexpr.org --- Created attachment 115997 --> https://bugs.freedesktop.org/attachment.cgi?id=115997&action=edit R600_DEBUG=ps,vs,gs output for the Talos trace with r227461 (lockups)

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #15 from Daniel Scharrer daniel@constexpr.org --- Created attachment 116176 --> https://bugs.freedesktop.org/attachment.cgi?id=116176&action=edit dmesg log

Here is the dmesg log with Linux 4.0.4-gentoo and LLVM patched to disable the machine scheduler for SI, after replaying both sarnex' and my trace. I don't have an unpatched LLVM build right now, but don't remember the dmesg output being different.

The log is compressed because there are lots of GPU faults at the end (bug #87278) which pushed the uncompressed log over the attachment size limit - not sure if you wanted those or just the startup part.

Bug #90378 has the dmesg output for L4D2 including GPU lockups with an unpatched (but older revision on) LLVM and 4.0.1-gentoo in attachment 115653.

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #17 from Tom Stellard tstellar@gmail.com --- (In reply to Tom Stellard from comment #16)

(In reply to Daniel Scharrer from comment #15)

...

Created attachment 116176 [details] dmesg log

Here is the dmesg log with Linux 4.0.4-gentoo and LLVM patched to disable the machine scheduler for SI, after replaying both sarnex' and my trace. I don't have an unpatched LLVM build right now, but don't remember the dmesg output being different.

The log is compressed because there are lots of GPU faults at the end (bug #87278) which pushed the uncompressed log over the attachment size limit - not sure if you wanted those or just the startup part.

Bug #90378 has the dmesg output for L4D2 including GPU lockups with an unpatched (but older revision on) LLVM and 4.0.1-gentoo in attachment 115653 [details] [details].

Would you be able to post an API trace of one of the games that is locking up?

Nevermind, I think the one you posted already should be enough.

https://bugs.freedesktop.org/show_bug.cgi?id=88978

--- Comment #19 from sarnex commendsarnex@gmail.com --- I cannot reproduce this on Mesa master, it must have been fixed with radeonsi: completely rework updating descriptors without CP DMA