Comments (3)
from geoflac.
The original error was fixed with an option, -ta=tesla:cc60,managed
.
However, another error occurred during compilation of bc_updated.f90
:
pgf90 -g -acc=gpu -Mcuda -Minfo=accel -ta=tesla:cc60,managed -O2 -Minfo=all -c bc_update.f90
bc_update:
18, Generating implicit copyout(force(:,:,:)) [if not already present]
19, Loop is parallelizable
Generating Tesla code
19, ! blockidx%x threadidx%x auto-collapsed
!$acc loop gang, vector(128) collapse(3) ! blockidx%x threadidx%x
23, Accelerator serial kernel generated
Generating Tesla code
25, !$acc do seq
57, !$acc do seq
23, Generating implicit copyin(force(:,:,1:2)) [if not already present]
Generating implicit copyout(force(:,nx,1:2)) [if not already present]
Generating implicit copyin(iphase(:,:)) [if not already present]
Generating implicit copy(j) [if not already present]
Generating implicit copyin(cord(:,:,1:2)) [if not already present]
26, Accelerator restriction: induction variable live-out from loop: j
28, Accelerator restriction: induction variable live-out from loop: j
29, Accelerator restriction: induction variable live-out from loop: j
35, Accelerator restriction: induction variable live-out from loop: j
36, Accelerator restriction: induction variable live-out from loop: j
40, Accelerator restriction: induction variable live-out from loop: j
41, Accelerator restriction: induction variable live-out from loop: j
45, Accelerator restriction: induction variable live-out from loop: j
46, Accelerator restriction: induction variable live-out from loop: j
49, Accelerator restriction: induction variable live-out from loop: j
58, Accelerator restriction: induction variable live-out from loop: j
60, Accelerator restriction: induction variable live-out from loop: j
61, Accelerator restriction: induction variable live-out from loop: j
68, Accelerator restriction: induction variable live-out from loop: j
69, Accelerator restriction: induction variable live-out from loop: j
74, Accelerator restriction: induction variable live-out from loop: j
75, Accelerator restriction: induction variable live-out from loop: j
78, Accelerator restriction: induction variable live-out from loop: j
79, Accelerator restriction: induction variable live-out from loop: j
82, Accelerator restriction: induction variable live-out from loop: j
90, Generating implicit copyin(cord(:,:,1:2),nopbou(1:nopbmax,1:4)) [if not already present]
Generating implicit copy(force(:,:,:)) [if not already present]
Generating implicit copyin(bcstress(1:nopbmax,1:2)) [if not already present]
91, Complex loop carried dependence of force prevents parallelization
Loop carried dependence due to exposed use of force(:,:,:) prevents parallelization
Accelerator serial kernel generated
Generating Tesla code
91, !$acc loop seq
nvvmCompileProgram error 9: NVVM_ERROR_COMPILATION.
Error: /tmp/pgaccA26soObjQ4KE.gpu (1041, 4): parse multiple definition of local value named 'li1167_tca0'
ptxas /tmp/pgacc626sU5dvkTRA.ptx, line 1; fatal : Missing .version directive at start of file '/tmp/pgacc626sU5dvkTRA.ptx'
ptxas fatal : Ptx assembly aborted due to errors
NVFORTRAN-F-0155-Compiler failed to translate accelerator region (see -Minfo messages): Device compiler exited with error status code (bc_update.f90: 90)
NVFORTRAN/x86-64 Linux 21.3-0: compilation aborted
make: *** [Makefile:219: bc_update.o] Error 2
According to https://forums.developer.nvidia.com/t/nv-21-3-fails-to-compile-my-openacc-code/176435, NVIDIA HPC SDK 21.3 has some problems including this one. The solution suggested in the nvidia forum did fix the error, which is to add -Mx,231,0x01
.
The building is now completed on my machine (see below for specs) but a segmentation fault occurs when the executable is run with examples/subduction.inp
.
$ nvidia-smi
Thu May 20 09:53:33 2021
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 460.73.01 Driver Version: 460.73.01 CUDA Version: 11.2 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 GeForce GTX 1080 Off | 00000000:04:00.0 On | N/A |
| 0% 38C P8 9W / 215W | 78MiB / 8111MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
$ pgf90 -V
pgf90 (aka nvfortran) 21.3-0 LLVM 64-bit target on x86-64 Linux -tp haswell
PGI Compilers and Tools
Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
from geoflac.
The issue has been resolved.
NVIDIA SDK 21.2 was tried and found to work. For my GTX-1080 GPU, I had only to change cc70
to cc60
in the compile and linking options.
Although this is a separate issue, I report here that the OpenMP version built with pgf90 crashes during remeshing on my machine. When built with gfortran, however, the OpenMP version works fine.
from geoflac.
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