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Merge pull request #27 from psychocrypt/topic-improveAmdAutoAdjust

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improve AMD auto suggestion
This commit is contained in:
fireice-uk
2017-10-11 16:35:07 +01:00
committed by GitHub
parent 984ddf9ebb e0b93c2216
commit 0c332962d9
1 changed files with 7 additions and 2 deletions
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xmrstak/backend/amd/autoAdjust.hpp
+7 -2
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@@ -79,6 +79,8 @@ private:
configEditor configTpl{};
configTpl.set( std::string(tpl) );
constexpr size_t byteToMiB = 1024u * 1024u;
std::string conf;
int i = 0;
for(auto& ctx : devVec)
@@ -89,8 +91,11 @@ private:
size_t perThread = (size_t(1u)<<21) + 224u;
size_t max_intensity = availableMem / perThread;
// 1000 is a magic selected limit \todo select max intensity depending of the gpu type
size_t intensity = std::min( size_t(1000u) , max_intensity );
conf += std::string(" // gpu: ") + ctx.name + "\n";
size_t possibleIntensity = std::min( size_t(1000u) , max_intensity );
// map intensity to a multiple of the compute unit count, 8 is the number of threads per work group
size_t intensity = (possibleIntensity / (8 * ctx.computeUnits)) * ctx.computeUnits * 8;
conf += std::string(" // gpu: ") + ctx.name + " memory:" + std::to_string(availableMem / byteToMiB) + "\n";
conf += std::string(" // compute units: ") + std::to_string(ctx.computeUnits) + "\n";
// set 8 threads per block (this is a good value for the most gpus)
conf += std::string(" { \"index\" : ") + std::to_string(ctx.deviceIdx) + ",\n" +
" \"intensity\" : " + std::to_string(intensity) + ", \"worksize\" : " + std::to_string(8) + ",\n" +