mcmodel medium linking for x86_64/EMT64

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

Has anyone seen this error linking a large-host memory application? This is with PGI 10.4.0 I can’t find this entrypoint in the library set either.

 -g -r8  -D_BIG_ENDIAN -Mextend -Mcuda=cc13,keepptx -fastsse -mcmodel=medium -Minform,inform -Minfo=all,ftn,intensity -o slv_5d 
chiralcuda.o: In function `mopr5_eo_':
/home/users/saraha/PreBenchmark/Src/./chiralcuda.F:141: undefined reference to `pgf90_dev_auto_alloc_i8'
/home/users/saraha/PreBenchmark/Src/./chiralcuda.F:287: undefined reference to `pgf90_dev_auto_dealloc_i8'
cg_overlap_5d.o: In function `mopr5_5d_eo_':
/home/users/saraha/PreBenchmark/Src/./cg_overlap_5d.F:323: undefined reference to `pgf90_dev_auto_alloc_i8'
/home/users/saraha/PreBenchmark/Src/./cg_overlap_5d.F:323: undefined reference to `pgf90_dev_auto_alloc_i8'
/home/users/saraha/PreBenchmark/Src/./cg_overlap_5d.F:336: undefined reference to `pgf90_dev_auto_dealloc_i8'
/home/users/saraha/PreBenchmark/Src/./cg_overlap_5d.F:336: undefined reference to `pgf90_dev_auto_dealloc_i8
2

I guess no one has run into this. Here is a simple reproducer using PGI fortran 10.4.0

nvcc -c bigtest_kernel.cu
pgfortran -Mcuda -mcmodel=medium bigtest_kernel.o bigtest.F

I get:

pgfortran -Mcuda -mcmodel=medium bigtest_kernel.o bigtest.F
bigtest.F:
bigtest.o: In function `MAIN':
/home/users/saraha/./bigtest.F:11: undefined reference to `pgf90_dev_auto_alloc_i8'
/home/users/saraha/./bigtest.F:11: undefined reference to `pgf90_dev_auto_dealloc_i8'

where bigtest_kernel.cu is just

extern "C" {__global__ void ackernel_( float *arg ) {} }

and bigtest.F is

      integer, parameter:: M=400
      integer, parameter:: N=2097152
      real, device, dimension(1000000) :: a_dev
      common /biggy/ a(N,M)
      interface
         subroutine ackernel( arg )
         use iso_c_binding
         real, device, dimension(100000) :: arg
         end subroutine ackernel
      end interface
      call ackernel<<<1,100>>>(a_dev)
      print *, a(1,1)
      stop
      end

[/quote]

3

Hi SarahA,

Using the medium memory model with CUDA Fortran isn’t supported yet. It’s in our feature queue, but had been a lower priority item. I’ve asked our developers to increase it’s priority so hopefully we have have it available soon.

Thanks!
Mat