https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- Comment #1 from Jan Vesely jan.vesely@rutgers.edu --- (In reply to Grazvydas Ignotas from comment #0)

AMD JUNIPER (DRM 2.43.0 / 4.6.0) Mesa 12.1.0-devel (git-3581812) llvm-3.8 1:3.8-2ubuntu3

clpeak - https://github.com/krrishnarraj/clpeak.git

As soon as it starts it's float8 test (earlier ones run fine), the machine locks up and does not recover. Perhaps it attempts to execute some fp64 instructions that are missing on Juniper?

any attempt to use doubles should fail to build the kernel (even with llvm 3.8).

Running with CLOVER_DEBUG=llvm,asm CLOVER_OUTPUT=out_file should give you an idea about what the compiled program looks like, though I'd recommend using llvm 3.9.

https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- Comment #3 from Grazvydas Ignotas notasas@gmail.com --- OK so it's the memory bandwidth test that causes the GPU hang, --compute-dp fails with "No double precision support! Skipped", as expected.

llvm 3.9 doesn't seemed to be released so I've build the trunk, but the hang is still there. I've been able to capture the logs before the system dies, attached.

BTW CLOVER_OUTPUT doesn't seem to be handled, did you mean CLOVER_DEBUG_FILE?

https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- Comment #5 from Jan Vesely jan.vesely@rutgers.edu --- One problem is that starting from R700 ADD_INT is VecALU only instruction (should not be in Trans slot), but it was not enough to fix the hang on my Turks.

https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- Comment #6 from ricardo.ribalda@gmail.com --- Using llvm 4.0.1 and the latest git commit from libclc ( 17648cd846390e294feafef21c32c7106eac1e24 ):

I am getting a cpu endless loop with clpeak, fixable with ctrl+c.

Other samples, such as Matrix Multiply work fine.

CLOVER_DEBUG=llvm,asm,clc CLOVER_OUTPUT=clover.out clpeak >dump 2>dump.err

https://bugs.freedesktop.org/show_bug.cgi?id=96296

--- Comment #8 from Jan Vesely jan.vesely@rutgers.edu --- got this today. No hang.

Platform: Clover Device: AMD TURKS (DRM 2.49.0 / 4.11.11-300.fc26.x86_64, LLVM 6.0.0) Driver version : 17.3.0-devel (Linux x64) Compute units : 6 Clock frequency : 650 MHz

Global memory bandwidth (GBPS) float : 40.47 float2 : 41.01 float4 : 38.05 float8 : 25.09 float16 : 13.33

Single-precision compute (GFLOPS) float : 124.18 float2 : 243.14 float4 : 249.80 float8 : 285.99 float16 : 350.36

No double precision support! Skipped

Integer compute (GIOPS) int : 62.25 int2 : 122.03 int4 : 123.01 int8 : 122.29 int16 : 122.11

Transfer bandwidth (GBPS) enqueueWriteBuffer : 18.15 enqueueReadBuffer : 3.06 enqueueMapBuffer(for read) : 6.53 memcpy from mapped ptr : 5.65 enqueueUnmap(after write) : 2108.68 memcpy to mapped ptr : 7.49

Kernel launch latency : 67.10 us

https://bugs.freedesktop.org/show_bug.cgi?id=96296

Jan Vesely jan.vesely@rutgers.edu changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|FIXED |---

--- Comment #10 from Jan Vesely jan.vesely@rutgers.edu --- turns out I spoke too fast. The GPU still hangs, but Linux is better at recovering. There are still GPU hang(ring 0 stalled for more than) messages in dmesg.

https://bugs.freedesktop.org/show_bug.cgi?id=96296

GitLab Migration User gitlab-migration@fdo.invalid changed:

What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |MOVED Status|REOPENED |RESOLVED

--- Comment #11 from GitLab Migration User gitlab-migration@fdo.invalid --- -- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/586.