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/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining
* it with OpenSSL (or a modified version of that library), containing parts
* covered by the terms of OpenSSL License and SSLeay License, the licensors
* of this Program grant you additional permission to convey the resulting work.
*
*/
#include "telemetry.hpp"
#include <cmath>
#include <cstring>
#include <chrono>
namespace xmrstak
{
telemetry::telemetry(size_t iThd)
{
ppHashCounts = new uint64_t*[iThd];
ppTimestamps = new uint64_t*[iThd];
iBucketTop = new uint32_t[iThd];
for (size_t i = 0; i < iThd; i++)
{
ppHashCounts[i] = new uint64_t[iBucketSize];
ppTimestamps[i] = new uint64_t[iBucketSize];
iBucketTop[i] = 0;
memset(ppHashCounts[i], 0, sizeof(uint64_t) * iBucketSize);
memset(ppTimestamps[i], 0, sizeof(uint64_t) * iBucketSize);
}
}
double telemetry::calc_telemetry_data(size_t iLastMilisec, size_t iThread)
{
using namespace std::chrono;
uint64_t iTimeNow = time_point_cast<milliseconds>(high_resolution_clock::now()).time_since_epoch().count();
uint64_t iEarliestHashCnt = 0;
uint64_t iEarliestStamp = 0;
uint64_t iLastestStamp = 0;
uint64_t iLastestHashCnt = 0;
bool bHaveFullSet = false;
//Start at 1, buckettop points to next empty
for (size_t i = 1; i < iBucketSize; i++)
{
size_t idx = (iBucketTop[iThread] - i) & iBucketMask; //overflow expected here
if (ppTimestamps[iThread][idx] == 0)
break; //That means we don't have the data yet
if (iLastestStamp == 0)
{
iLastestStamp = ppTimestamps[iThread][idx];
iLastestHashCnt = ppHashCounts[iThread][idx];
}
if (iTimeNow - ppTimestamps[iThread][idx] > iLastMilisec)
{
bHaveFullSet = true;
break; //We are out of the requested time period
}
iEarliestStamp = ppTimestamps[iThread][idx];
iEarliestHashCnt = ppHashCounts[iThread][idx];
}
if (!bHaveFullSet || iEarliestStamp == 0 || iLastestStamp == 0)
return nan("");
//Don't think that can happen, but just in case
if (iLastestStamp - iEarliestStamp == 0)
return nan("");
double fHashes, fTime;
fHashes = iLastestHashCnt - iEarliestHashCnt;
fTime = iLastestStamp - iEarliestStamp;
fTime /= 1000.0;
return fHashes / fTime;
}
void telemetry::push_perf_value(size_t iThd, uint64_t iHashCount, uint64_t iTimestamp)
{
size_t iTop = iBucketTop[iThd];
ppHashCounts[iThd][iTop] = iHashCount;
ppTimestamps[iThd][iTop] = iTimestamp;
iBucketTop[iThd] = (iTop + 1) & iBucketMask;
}
} // namepsace xmrstak
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