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Merge pull request #5705 from akva2/fix_div_by_zero_no_gpus

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fixed: division by zero if no gpu device was found
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Bård Skaflestad 2024-11-01 13:09:24 +01:00 committed by GitHub
commit fadc96da44
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1 changed files with 12 additions and 11 deletions
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opm/simulators/linalg/gpuistl/device_management.cpp
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@ -37,7 +37,7 @@ namespace Opm::gpuistl {
into problems with this code when using multiple MPI ranks. into problems with this code when using multiple MPI ranks.
The simulation might hang because the integrated GPU in the CPU The simulation might hang because the integrated GPU in the CPU
is detected has Radeon compute units, but it does not support ROCM. is detected has Radeon compute units, but it does not support ROCM.
This is fixable my making only the GPUS on your system visible with This is fixable by making only the GPUS on your system visible with
ROCR_VISIBLE_DEVICES environment variable. ROCR_VISIBLE_DEVICES environment variable.
*/ */
void printDevice() void printDevice()
@ -51,6 +51,8 @@ namespace Opm::gpuistl {
int deviceCount = -1; int deviceCount = -1;
OPM_GPU_WARN_IF_ERROR(cudaGetDeviceCount(&deviceCount)); OPM_GPU_WARN_IF_ERROR(cudaGetDeviceCount(&deviceCount));
auto deferred_logger = ::Opm::DeferredLogger();
if (deviceCount > 0) {
const auto deviceId = mpiRank % deviceCount; const auto deviceId = mpiRank % deviceCount;
struct cudaDeviceProp props; struct cudaDeviceProp props;
@ -59,14 +61,13 @@ namespace Opm::gpuistl {
std::string out; std::string out;
out = fmt::format("rank: {}, GPU: {}, Compute Capability: {}.{} (device {} out of {})\n", out = fmt::format("rank: {}, GPU: {}, Compute Capability: {}.{} (device {} out of {})\n",
mpiRank, props.name, props.major, props.minor, deviceId, deviceCount); mpiRank, props.name, props.major, props.minor, deviceId, deviceCount);
auto deferred_logger = ::Opm::DeferredLogger();
deferred_logger.info(out); deferred_logger.info(out);
}
DeferredLogger global = gatherDeferredLogger(deferred_logger, FlowGenericVanguard::comm()); DeferredLogger global = gatherDeferredLogger(deferred_logger, FlowGenericVanguard::comm());
if (mpiRank == 0) { if (mpiRank == 0) {
global.logMessages(); global.logMessages();
} }
#endif #endif
} }