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Bug #3127

mdrun-mpi-test -ntmpi 2 runs out of memory with OpenCL on Nvidia

Added by Berk Hess about 1 month ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Affected version - extra info:
Affected version:
Difficulty:
uncategorized
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Description

A debug build with opencl on Nvidia hardware always has mdrun-mpi-test run out of memory when using 2 MPI ranks:

Program: mdrun-mpi-test, version 2020-beta1-dev-20191009-000599bc12
Source file: src/gromacs/nbnxm/opencl/nbnxm_ocl_data_mgmt.cpp (line 537)
MPI rank: 0 (out of 2)

Fatal error:
On rank 0 failed to create context for GPU #GeForce GTX 1070:
OpenCL error -6: CL_OUT_OF_HOST_MEMORY

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