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ethminer
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Adjust CL miner work batch size properly 

We are now propery adjusting the batch size of the OpenCL miner
properly depending on the execution time of the last search.
cl-refactor
Lefteris Karapetsas 10 years ago
parent
77c1da7251
commit
f03c12ca24
1 changed files with 16 additions and 13 deletions
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  1. 29
      libethash-cl/ethash_cl_miner.cpp

29
libethash-cl/ethash_cl_miner.cpp
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@ -456,8 +456,7 @@ void ethash_cl_miner::search(uint8_t const* header, uint64_t target, search_hook
uint64_t start_nonce = uniform_int_distribution<uint64_t>()(engine);
for (;; start_nonce += m_batchSize)
{
// chrono::high_resolution_clock::time_point t = chrono::high_resolution_clock::now();
chrono::high_resolution_clock::time_point t = chrono::high_resolution_clock::now();
// supply output buffer to kernel
m_searchKernel.setArg(0, m_searchBuffer[buf]);
if (m_dagChunksCount == 1)
@ -497,19 +496,23 @@ void ethash_cl_miner::search(uint8_t const* header, uint64_t target, search_hook
pending.pop();
}
/* chrono::high_resolution_clock::duration d = chrono::high_resolution_clock::now() - t;
if (d > chrono::milliseconds(_msPerBatch * 10 / 9))
// adjust batch size depending on last search time
auto d = chrono::duration_cast<chrono::milliseconds>(chrono::high_resolution_clock::now() - t);
if (d != chrono::milliseconds(0)) // if duration is zero, we did not get in the actual search so adjust nothing
{
cerr << "Batch of" << m_batchSize << "took" << chrono::duration_cast<chrono::milliseconds>(d).count() << "ms, >>" << _msPerBatch << "ms.";
m_batchSize = max<unsigned>(128, m_batchSize * 9 / 10);
cerr << "New batch size" << m_batchSize;
if (d > chrono::milliseconds(_msPerBatch * 10 / 9))
{
// cerr << "Batch of " << m_batchSize << " took " << chrono::duration_cast<chrono::milliseconds>(d).count() << " ms, >> " << _msPerBatch << " ms." << endl;
m_batchSize = max<unsigned>(128, m_batchSize * 9 / 10);
// cerr << "New batch size" << m_batchSize << endl;
}
else if (d < chrono::milliseconds(_msPerBatch * 9 / 10))
{
// cerr << "Batch of " << m_batchSize << " took " << chrono::duration_cast<chrono::milliseconds>(d).count() << " ms, << " << _msPerBatch << " ms." << endl;
m_batchSize = m_batchSize * 10 / 9;
// cerr << "New batch size" << m_batchSize << endl;
}
}
else if (d < chrono::milliseconds(_msPerBatch * 9 / 10))
{
cerr << "Batch of" << m_batchSize << "took" << chrono::duration_cast<chrono::milliseconds>(d).count() << "ms, <<" << _msPerBatch << "ms.";
m_batchSize = m_batchSize * 10 / 9;
cerr << "New batch size" << m_batchSize;
}*/
}
// not safe to return until this is ready

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