[cfe-users] omp_get_num_devices() returns 0 even though I have GPUs
Hi, I am trying to offload to my GPUs. I have GTX1060 6GB with compute capability of 6.1. I followed the instructions given in https://hpc-wiki.info/hpc/Building_LLVM/Clang_with_OpenMP_Offloading_to_NVIDIA_GPUs Then I compiled my helloworld program using the following environment variables: CFLAGS="-fopenmp -fopenmp-targets=nvptx64-sm_61 -pthread -I /usr/lib/gcc/x86_64-linux-gnu/9/include -O2 --libomptarget-nvptx-path=$CLANG_HOME/lib --cuda-gpu-arch=sm_61" LD_LIBRARY_PATH=$CLANG_HOME/lib:$LD_LIBRARY_PATH CC=clang my helloworld program simply printfs omp_get_num_devices() after #including it compiles fine; but when i run it i get the number of devices as 0. Does someone have any idea? Thanks much, Mani ___ cfe-users mailing list cfe-users@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
[cfe-users] Fwd: omp_get_num_devices() returns 0 even though I have GPUs
I forgot to mention that I am using the latest clang-llvm-openmp versions of source code (10.0.0). -- Forwarded message - From: mashilamani sambasivam Date: Fri, Jul 3, 2020 at 10:56 AM Subject: omp_get_num_devices() returns 0 even though I have GPUs To: Hi, I am trying to offload to my GPUs. I have GTX1060 6GB with compute capability of 6.1. I followed the instructions given in https://hpc-wiki.info/hpc/Building_LLVM/Clang_with_OpenMP_Offloading_to_NVIDIA_GPUs Then I compiled my helloworld program using the following environment variables: CFLAGS="-fopenmp -fopenmp-targets=nvptx64-sm_61 -pthread -I /usr/lib/gcc/x86_64-linux-gnu/9/include -O2 --libomptarget-nvptx-path=$CLANG_HOME/lib --cuda-gpu-arch=sm_61" LD_LIBRARY_PATH=$CLANG_HOME/lib:$LD_LIBRARY_PATH CC=clang my helloworld program simply printfs omp_get_num_devices() after #including it compiles fine; but when i run it i get the number of devices as 0. Does someone have any idea? Thanks much, Mani ___ cfe-users mailing list cfe-users@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
Re: [cfe-users] omp_get_num_devices() returns 0 even though I have GPUs
Hi, I figured it out. I hadnt downloaded the proper NVIDIA drivers. https://linuxhint.com/ubuntu_nvidia_ppa/ proved useful to me. Now I am able to detect my GPU. Thanks much, mashilamani On Fri, Jul 3, 2020 at 11:11 AM mashilamani sambasivam < kandanarul1...@gmail.com> wrote: > > I forgot to mention that I am using the latest clang-llvm-openmp versions > of source code (10.0.0). > -- Forwarded message - > From: mashilamani sambasivam > Date: Fri, Jul 3, 2020 at 10:56 AM > Subject: omp_get_num_devices() returns 0 even though I have GPUs > To: > > > Hi, > I am trying to offload to my GPUs. I have GTX1060 6GB with compute > capability of 6.1. > > I followed the instructions given in > > https://hpc-wiki.info/hpc/Building_LLVM/Clang_with_OpenMP_Offloading_to_NVIDIA_GPUs > > Then I compiled my helloworld program using the following environment > variables: > CFLAGS="-fopenmp -fopenmp-targets=nvptx64-sm_61 -pthread -I > /usr/lib/gcc/x86_64-linux-gnu/9/include -O2 > --libomptarget-nvptx-path=$CLANG_HOME/lib --cuda-gpu-arch=sm_61" > > LD_LIBRARY_PATH=$CLANG_HOME/lib:$LD_LIBRARY_PATH > > CC=clang > > my helloworld program simply printfs omp_get_num_devices() after > #including > > it compiles fine; but when i run it i get the number of devices as 0. > > Does someone have any idea? > Thanks much, > Mani > ___ cfe-users mailing list cfe-users@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
