Add class Telemetry.

src/workers/Telemetry.cpp

@@ -0,0 +1,107 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2016-2017 XMRig       <support@xmrig.com>
+ *
+ *
+ *   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
+ *   (at your option) 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/>.
+ */
+
+
+#include <memory.h>
+#include <math.h>
+#include <chrono>
+
+#include "Console.h"
+#include "workers/Telemetry.h"
+
+
+Telemetry::Telemetry(int threads) :
+    m_threads(threads)
+{
+    m_counts     = new uint64_t*[threads];
+    m_timestamps = new uint64_t*[threads];
+    m_top        = new uint32_t[threads];
+
+    for (int i = 0; i < threads; i++) {
+        m_counts[i] = new uint64_t[kBucketSize];
+        m_timestamps[i] = new uint64_t[kBucketSize];
+        m_top[i] = 0;
+
+        memset(m_counts[0], 0, sizeof(uint64_t) * kBucketSize);
+        memset(m_timestamps[0], 0, sizeof(uint64_t) * kBucketSize);
+    }
+}
+
+
+double Telemetry::calc(size_t threadId, size_t ms) const
+{
+    using namespace std::chrono;
+    const uint64_t now = time_point_cast<milliseconds>(high_resolution_clock::now()).time_since_epoch().count();
+
+    uint64_t earliestHashCount = 0;
+    uint64_t earliestStamp     = 0;
+    uint64_t lastestStamp      = 0;
+    uint64_t lastestHashCnt    = 0;
+    bool haveFullSet           = false;
+
+    for (size_t i = 1; i < kBucketSize; i++) {
+        const size_t idx = (m_top[threadId] - i) & kBucketMask;
+
+        if (m_timestamps[threadId][idx] == 0) {
+            break;
+        }
+
+        if (lastestStamp == 0) {
+            lastestStamp = m_timestamps[threadId][idx];
+            lastestHashCnt = m_counts[threadId][idx];
+        }
+
+        if (now - m_timestamps[threadId][idx] > ms) {
+            haveFullSet = true;
+            break;
+        }
+
+        earliestStamp = m_timestamps[threadId][idx];
+        earliestHashCount = m_counts[threadId][idx];
+    }
+
+    if (!haveFullSet || earliestStamp == 0 || lastestStamp == 0) {
+        return nan("");
+    }
+
+    if (lastestStamp - earliestStamp == 0) {
+        return nan("");
+    }
+
+    double hashes, time;
+    hashes = lastestHashCnt - earliestHashCount;
+    time   = lastestStamp - earliestStamp;
+    time  /= 1000.0;
+
+    return hashes / time;
+}
+
+
+void Telemetry::add(size_t threadId, uint64_t count, uint64_t timestamp)
+{
+    const size_t top = m_top[threadId];
+    m_counts[threadId][top]     = count;
+    m_timestamps[threadId][top] = timestamp;
+
+    m_top[threadId] = (top + 1) & kBucketMask;
+}