RandomX: added performance profiler (for developers)

Also optimized Blake2b SSE4.1 code size to avoid code cache pollution.
2020-09-12 23:07:52 +02:00 · 2020-09-12 23:07:52 +02:00 · a05393727c
commit a05393727c
parent adf833b60a
19 changed files with 390 additions and 481 deletions
--- a/src/base/tools/Profiler.cpp
+++ b/src/base/tools/Profiler.cpp
@ -0,0 +1,100 @@
+/* XMRig
+ * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2020 XMRig       <https://github.com/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 "base/tools/Profiler.h"
+#include "base/io/log/Log.h"
+#include "base/io/log/Tags.h"
+#include <sstream>
+#include <thread>
+#include <chrono>
+#include <algorithm>
+
+
+#ifdef XMRIG_FEATURE_PROFILING
+
+
+ProfileScopeData* ProfileScopeData::s_data[MAX_DATA_COUNT] = {};
+volatile long ProfileScopeData::s_dataCount = 0;
+double ProfileScopeData::s_tscSpeed = 0.0;
+
+
+#ifndef NOINLINE
+#ifdef __GNUC__
+#define NOINLINE __attribute__ ((noinline))
+#elif _MSC_VER
+#define NOINLINE __declspec(noinline)
+#else
+#define NOINLINE
+#endif
+#endif
+
+
+static std::string get_thread_id()
+{
+    std::stringstream ss;
+    ss << std::this_thread::get_id();
+
+    std::string s = ss.str();
+    if (s.length() > ProfileScopeData::MAX_THREAD_ID_LENGTH) {
+        s.resize(ProfileScopeData::MAX_THREAD_ID_LENGTH);
+    }
+
+    return s;
+}
+
+
+NOINLINE void ProfileScopeData::Register(ProfileScopeData* data)
+{
+#ifdef _MSC_VER
+    const long id = _InterlockedIncrement(&s_dataCount) - 1;
+#else
+    const long id = __sync_fetch_and_add(&s_dataCount, 1);
+#endif
+
+    if (static_cast<unsigned long>(id) < MAX_DATA_COUNT) {
+        s_data[id] = data;
+
+        const std::string s = get_thread_id();
+        memcpy(data->m_threadId, s.c_str(), s.length() + 1);
+    }
+}
+
+
+NOINLINE void ProfileScopeData::Init()
+{
+    using namespace std::chrono;
+
+    const uint64_t t1 = static_cast<uint64_t>(time_point_cast<nanoseconds>(high_resolution_clock::now()).time_since_epoch().count());
+    const uint64_t count1 = ReadTSC();
+
+    for (;;)
+    {
+        const uint64_t t2 = static_cast<uint64_t>(time_point_cast<nanoseconds>(high_resolution_clock::now()).time_since_epoch().count());
+        const uint64_t count2 = ReadTSC();
+
+        if (t2 - t1 > 1000000000) {
+            s_tscSpeed = (count2 - count1) * 1e9 / (t2 - t1);
+            LOG_INFO("%s TSC speed = %.3f GHz", xmrig::Tags::profiler(), s_tscSpeed / 1e9);
+            return;
+        }
+    }
+}
+
+
+#endif /* XMRIG_FEATURE_PROFILING */