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* [Bug fortran/99005] New: libgomp runtime does not support AMD GPU offloading for OpenACC directives
@ 2021-02-08 15:52 kd486 at cam dot ac.uk
2021-02-08 19:57 ` [Bug libgomp/99005] " burnus at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: kd486 at cam dot ac.uk @ 2021-02-08 15:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99005
Bug ID: 99005
Summary: libgomp runtime does not support AMD GPU offloading
for OpenACC directives
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: kd486 at cam dot ac.uk
Target Milestone: ---
Created attachment 50143
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50143&action=edit
Sample code with single OpenACC directive in for loop
Simple Gfortran compiled OpenACC code crashes. Code used attached and compiled
with:
gfortran -fopenacc -Wall -Wextra -foffload=amdgcn-amdhsa="-march=gfx900" -c
mymodule.f90
The server has an AMD EPYC 7742 CPU with 4 Vega 20 AMD GPUs.
Runtime error:
./main
libgomp: GCN fatal error: Run-time could not be initialized
Runtime message: HSA_STATUS_ERROR_OUT_OF_RESOURCES: The runtime failed to
allocate the necessary resources. This error may also occur when the core
runtime library needs to spawn threads or create internal OS-specific events.
Code runs fine without GPU offloading, or with offloading with PGI compiler.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libgomp/99005] libgomp runtime does not support AMD GPU offloading for OpenACC directives
2021-02-08 15:52 [Bug fortran/99005] New: libgomp runtime does not support AMD GPU offloading for OpenACC directives kd486 at cam dot ac.uk
@ 2021-02-08 19:57 ` burnus at gcc dot gnu.org
2021-02-08 21:47 ` kd486 at cam dot ac.uk
2021-02-09 7:19 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: burnus at gcc dot gnu.org @ 2021-02-08 19:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99005
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Kiril Dichev from comment #0)
> Code runs fine without GPU offloading, or with offloading with PGI compiler.
With PGI + offloading: that's for that AMD Vega machine or for some Nvidia
system?
> Sample code with single OpenACC directive in for loop
The example code just contains only a module without a main program. Hence, I
added at the end:
use mymodule
implicit none (external, type)
call init
call do_work
call terminate
end
Using that on a gfx906 Vega 20 with GCC 11.0.0 20210203 and -march=gfx906 – and
works fine.
I have now also tried it with: gcc version 10.2.1 20210206 – same result.
* * *
Especially assuming that AMD system is not the same system as the system used
with the PGI compiler: If I look for HSA_STATUS_ERROR_OUT_OF_RESOURCES, I run
into https://github.com/RadeonOpenCompute/ROCm/issues/1080
That person did have such an error due to permission problems. I assume that it
works on your side, but just to check: Does /opt/rocm/bin/rocminfo work?
If it does, does the program as above work (your module + the lines by me to
run it)? Are there more messages? Which compiler version did you use? Is this a
Linux vendor compiler (which one?), some pre-compiled compiler or self
compiled?
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libgomp/99005] libgomp runtime does not support AMD GPU offloading for OpenACC directives
2021-02-08 15:52 [Bug fortran/99005] New: libgomp runtime does not support AMD GPU offloading for OpenACC directives kd486 at cam dot ac.uk
2021-02-08 19:57 ` [Bug libgomp/99005] " burnus at gcc dot gnu.org
@ 2021-02-08 21:47 ` kd486 at cam dot ac.uk
2021-02-09 7:19 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: kd486 at cam dot ac.uk @ 2021-02-08 21:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99005
--- Comment #2 from Kiril Dichev <kd486 at cam dot ac.uk> ---
Yes, I can confirm that there seems to be an underlying issue with permissions,
similar to the link you posted (rocminfo gives me the same error).
Indeed, I was referring to compilation with PGI on an Nvidia system.
Looks like this is not a bug. Sorry.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libgomp/99005] libgomp runtime does not support AMD GPU offloading for OpenACC directives
2021-02-08 15:52 [Bug fortran/99005] New: libgomp runtime does not support AMD GPU offloading for OpenACC directives kd486 at cam dot ac.uk
2021-02-08 19:57 ` [Bug libgomp/99005] " burnus at gcc dot gnu.org
2021-02-08 21:47 ` kd486 at cam dot ac.uk
@ 2021-02-09 7:19 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-02-09 7:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99005
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-02-08 15:52 [Bug fortran/99005] New: libgomp runtime does not support AMD GPU offloading for OpenACC directives kd486 at cam dot ac.uk
2021-02-08 19:57 ` [Bug libgomp/99005] " burnus at gcc dot gnu.org
2021-02-08 21:47 ` kd486 at cam dot ac.uk
2021-02-09 7:19 ` rguenth at gcc dot gnu.org
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