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ROCm / ROCm-CompilerSupport

The compiler support repository provides various Lightning Compiler related services.
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[Issue]: lld: error: undefined symbol: memcpy #65

Closed Ashutosh-Londhe closed 2 months ago

Ashutosh-Londhe commented 4 months ago

Problem Description

I am getting lld: error: undefined symbol: memcpy error when compiling with rocm compiler

my command is this: /ext-home/asl/install/openmpi/rocm5.6/install/bin/mpicxx -O3 -fPIC -Wall -g -std=c++11 -fopenmp -fopenmp -fopenmp=libomp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx908 -DOPS_MPI -I/ext-home/asl/OPS_cg/OPS/ops/c/include -L/ext-home/asl/OPS_cg/OPS/ops/c/lib/clang laplace2d_ops.cpp -I. ./openmp_offload/openmp_offload_kernels.cpp -lops_mpi_ompoffload -o laplace2d_mpi_ompoffload

i have set CC=clang and CXX=clang++ i am using rocm5.6.0

Operating System

Ubuntu 20.04.6

CPU

AMD EPYC 7543 32-Core Processor

GPU

AMD Instinct MI100

ROCm Version

ROCm 5.6.0

ROCm Component

No response

Steps to Reproduce

No response

(Optional for Linux users) Output of /opt/rocm/bin/rocminfo --support

No response

Additional Information

No response

lamb-j commented 4 months ago

Thanks for reporting, I'm looking into this.

Can you provide the source files used in your compilation command, or are they available somewhere I can access?

lamb-j commented 4 months ago

[AMD Official Use Only - General]

Hi Mark,

Do we have anyone that works closely with MPI+Rocm?

I’m trying to reproduce this issue, and I’m looking for resources on building rocm-supported OpenMPI.

Thanks,

Jacob

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Problem Description

I am getting lld: error: undefined symbol: memcpy error when compiling with rocm compiler

my command is this: /ext-home/asl/install/openmpi/rocm5.6/install/bin/mpicxx -O3 -fPIC -Wall -g -std=c++11 -fopenmp -fopenmp -fopenmp=libomp -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx908 -DOPS_MPI -I/ext-home/asl/OPS_cg/OPS/ops/c/include -L/ext-home/asl/OPS_cg/OPS/ops/c/lib/clang laplace2d_ops.cpp -I. ./openmp_offload/openmp_offload_kernels.cpp -lops_mpi_ompoffload -o laplace2d_mpi_ompoffload

i have set CC=clang and CXX=clang++ i am using rocm5.6.0

Operating System

Ubuntu 20.04.6

CPU

AMD EPYC 7543 32-Core Processor

GPU

AMD Instinct MI100

ROCm Version

ROCm 5.6.0

ROCm Component

No response

Steps to Reproduce

No response

(Optional for Linux users) Output of /opt/rocm/bin/rocminfo --support

No response

Additional Information

No response

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Ashutosh-Londhe commented 4 months ago

Hi,

I am trying this with OpenSource DSL library OPS https://github.com/OP-DSL/OPS.git

After cloning, you first need to install the OPS C library, for which instructions can be found at https://ops-dsl.readthedocs.io/en/latest/installation.html#using-makefiles you can use the file source_amd_rocm-5.4.3_pythonenv present in OPS/scripts folder for setting up the required environment for Make

once the library build is finished, you can try building laplace example available in "OPS/apps/c/laplace2d_tutorial/step7" `1. Open the Makefile and uncomment the following line (second last) include $(OPS_INSTALL_PATH)/../makefiles/Makefile.c_app_legacy #uncomment and comment the last line include $(OPS_INSTALL_PATH)/../makefiles/Makefile.c_app #comment

  1. run the command to build MPI+OpenMP_offload target make laplace2d_mpi_ompoffload`
Ashutosh-Londhe commented 3 months ago

Hi @lamb-j

I was able to resolve this issue. I had this memcpy inside an OpenMP offload loop so it was expecting a device version for the same. I was earlier trying with PGI compiler, where i think they had it so not coming across this error with PGI. After replacing memcpy with normal for loop, the error is resolved.