Hi,
I need some help to understand a runtime error with an OpenACC fortran
code built with Gnu Fortran.
- My gfortran is from the git repository, branch devel/omp/gcc-13,
updated today.
- it is built with cuda: /opt/nvidia/hpc_sdk/Linux_x86_64/24.3/cuda/
(from Nvidia RPM)
- binutils is 2.42
Building and running a small application works:
- creating storage on the device in a subroutine,
- initializing the data with different values on the host and on the
device in the main application,
- checking data on the host and on the device in the main application
Building my large application is successful but when running it, it ends
quickly with "*libgomp: target function wasn't mapped*". it is an
openMPI application but for this test I use only one process:
mpirun -n 1 ./appp.exe
If I set GOMP_DEBUG=1 I get more messages and I think they show that
some data is offloaded before the error. But I do not understand how to
investigate such error. Details are provided below:
goacc_profiling_initialize: calling acc_register_library
dummy acc_register_library
GOMP_NVPTX_LOWLAT_POOL: <Not defined>
/* messages printed from my application removed */
libgomp: target function wasn't mapped
nvptx_run_deferred_page_locked_host_free
gomp_attach_pointer: attaching host 0x250b160, target 0x7fa76b20a800
(struct base 0x7fa76b20a800) to 0x7fa76b20aa00
/* several similar messages removed */
gomp_attach_pointer: attaching host 0x251db00, target 0x7fa76b20f400
(struct base 0x7fa76b20f400) to 0x7fa76b20f600
gomp_attach_pointer: attaching host 0x251e870, target 0x7fa76b20f800
(struct base 0x7fa76b20f800) to 0x7fa76b20fa00
gomp_attach_pointer: attaching host 0x251f5e0, target 0x7fa76b20fc00
(struct base 0x7fa76b20fc00) to 0x7fa76b20fe00
gomp_attach_pointer: attaching host 0x2520350, target 0x7fa76b210000
(struct base 0x7fa76b210000) to 0x7fa76b210200
GOACC_parallel_keyed: mapnum=11, hostaddrs=0x7ffcd9a731a0,
size=0x7ffcd9a73140, kinds=0x7fa7bfd2daa0
libgomp: target function wasn't mapped
nvptx_run_deferred_page_locked_host_free
My application is a "main" program and a large library. Building static
or dynamic library raise the same problem (I know there was some
problems with olders binutils and static link)
So any help is welcome.
Patrick
