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Updated CUDA optimiser SM support #627

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merged 2 commits into from
Jun 6, 2024
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Updated CUDA optimiser SM support #627

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83fd95c
Added SM 9.0 support to CUDA optimiser and updated SM 7 and SM 8 to b…
neworderofjamie Jun 5, 2024
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neworderofjamie Jun 5, 2024
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27 changes: 23 additions & 4 deletions src/genn/backends/cuda/optimiser.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -125,15 +125,34 @@
smemAllocGran = 256;
warpAllocGran = 4;
regAllocGran = 256;
maxBlocksPerSM = (deviceProps.minor == 0) ? 32 : 16;
maxBlocksPerSM = (deviceProps.minor == 5) ? 16 : 32;

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}
else {
else if (deviceProps.major == 8) {
smemAllocGran = 128;
warpAllocGran = 4;
regAllocGran = 256;
maxBlocksPerSM = (deviceProps.minor == 0) ? 32 : 16;

if(deviceProps.major > 8) {
if (deviceProps.minor == 0) {
maxBlocksPerSM = 32;

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}
else if (deviceProps.minor == 9) {
maxBlocksPerSM = 24;

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}
else {
maxBlocksPerSM = 16;
}
}
else {
smemAllocGran = 128;
warpAllocGran = 4;
regAllocGran = 256;
maxBlocksPerSM = 32;
if(deviceProps.minor != 0) {
LOGW_BACKEND << "Unsupported CUDA device version: 9." << deviceProps.minor;
LOGW_BACKEND << "This is a bug! Please report it at https://github.com/genn-team/genn.";
LOGW_BACKEND << "Falling back to SM 9.0 parameters.";

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}
if(deviceProps.major > 9) {

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LOGW_BACKEND << "Unsupported CUDA device major version: " << deviceProps.major;
LOGW_BACKEND << "This is a bug! Please report it at https://github.com/genn-team/genn.";
LOGW_BACKEND << "Falling back to next latest SM version parameters.";
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