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141 lines
4.1 KiB
141 lines
4.1 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file EthashCPUMiner.cpp
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*
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* Determines the PoW algorithm.
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*/
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#include "EthashCPUMiner.h"
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#include <thread>
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#include <chrono>
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#include <boost/algorithm/string.hpp>
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#if ETH_CPUID || !ETH_TRUE
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#define HAVE_STDINT_H
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#include <libcpuid/libcpuid.h>
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#endif
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using namespace std;
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using namespace dev;
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using namespace eth;
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unsigned EthashCPUMiner::s_numInstances = 0;
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#if ETH_CPUID || !ETH_TRUE
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static string jsonEncode(map<string, string> const& _m)
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{
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string ret = "{";
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for (auto const& i: _m)
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{
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string k = boost::replace_all_copy(boost::replace_all_copy(i.first, "\\", "\\\\"), "'", "\\'");
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string v = boost::replace_all_copy(boost::replace_all_copy(i.second, "\\", "\\\\"), "'", "\\'");
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if (ret.size() > 1)
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ret += ", ";
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ret += "\"" + k + "\":\"" + v + "\"";
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}
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return ret + "}";
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}
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#endif
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EthashCPUMiner::EthashCPUMiner(GenericMiner<EthashProofOfWork>::ConstructionInfo const& _ci):
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GenericMiner<EthashProofOfWork>(_ci), Worker("miner" + toString(index()))
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{
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}
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EthashCPUMiner::~EthashCPUMiner()
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{
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}
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void EthashCPUMiner::kickOff()
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{
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stopWorking();
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startWorking();
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}
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void EthashCPUMiner::pause()
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{
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stopWorking();
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}
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void EthashCPUMiner::workLoop()
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{
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auto tid = std::this_thread::get_id();
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static std::mt19937_64 s_eng((time(0) + std::hash<decltype(tid)>()(tid)));
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uint64_t tryNonce = (uint64_t)(u64)Nonce::random(s_eng);
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ethash_return_value ethashReturn;
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WorkPackage w = work();
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EthashAux::FullType dag;
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while (!shouldStop() && !dag)
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{
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while (!shouldStop() && EthashAux::computeFull(w.seedHash, true) != 100)
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this_thread::sleep_for(chrono::milliseconds(500));
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dag = EthashAux::full(w.seedHash, false);
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}
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h256 boundary = w.boundary;
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unsigned hashCount = 1;
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for (; !shouldStop(); tryNonce++, hashCount++)
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{
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ethashReturn = ethash_full_compute(dag->full, *(ethash_h256_t*)w.headerHash.data(), tryNonce);
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h256 value = h256((uint8_t*)ðashReturn.result, h256::ConstructFromPointer);
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if (value <= boundary && submitProof(EthashProofOfWork::Solution{(h64)(u64)tryNonce, h256((uint8_t*)ðashReturn.mix_hash, h256::ConstructFromPointer)}))
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break;
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if (!(hashCount % 100))
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accumulateHashes(100);
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}
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}
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std::string EthashCPUMiner::platformInfo()
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{
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string baseline = toString(std::thread::hardware_concurrency()) + "-thread CPU";
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#if ETH_CPUID || !ETH_TRUE
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if (!cpuid_present())
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return baseline;
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struct cpu_raw_data_t raw;
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struct cpu_id_t data;
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if (cpuid_get_raw_data(&raw) < 0)
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return baseline;
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if (cpu_identify(&raw, &data) < 0)
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return baseline;
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map<string, string> m;
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m["vendor"] = data.vendor_str;
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m["codename"] = data.cpu_codename;
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m["brand"] = data.brand_str;
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m["L1 cache"] = toString(data.l1_data_cache);
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m["L2 cache"] = toString(data.l2_cache);
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m["L3 cache"] = toString(data.l3_cache);
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m["cores"] = toString(data.num_cores);
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m["threads"] = toString(data.num_logical_cpus);
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m["clocknominal"] = toString(cpu_clock_by_os());
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m["clocktested"] = toString(cpu_clock_measure(200, 0));
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/*
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printf(" MMX : %s\n", data.flags[CPU_FEATURE_MMX] ? "present" : "absent");
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printf(" MMX-extended: %s\n", data.flags[CPU_FEATURE_MMXEXT] ? "present" : "absent");
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printf(" SSE : %s\n", data.flags[CPU_FEATURE_SSE] ? "present" : "absent");
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printf(" SSE2 : %s\n", data.flags[CPU_FEATURE_SSE2] ? "present" : "absent");
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printf(" 3DNow! : %s\n", data.flags[CPU_FEATURE_3DNOW] ? "present" : "absent");
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*/
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return jsonEncode(m);
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#else
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return baseline;
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#endif
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}
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