From 67710b224346b962fe2b53f84b7ab17c8ee52191 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 4 Jun 2015 19:52:37 +0200
Subject: all: pin computation threads to specific cores

---
 opentrack/thread.hpp  | 37 +++++++++++++++++++++++++++++++++++++
 opentrack/tracker.cpp |  3 +++
 2 files changed, 40 insertions(+)
 create mode 100644 opentrack/thread.hpp

(limited to 'opentrack')

diff --git a/opentrack/thread.hpp b/opentrack/thread.hpp
new file mode 100644
index 00000000..f4e15c4e
--- /dev/null
+++ b/opentrack/thread.hpp
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <QDebug>
+
+enum {
+    CORE_WORK = 1,
+    CORE_IPC = 0,
+};
+
+#ifdef _WIN32
+#include <windows.h>
+
+class Affinity {
+public:
+    Affinity(int core = CORE_WORK)
+    {
+        DWORD_PTR ret = SetThreadAffinityMask(GetCurrentThread(), 1 << core);
+        if (ret == 0)
+            qDebug() << "SetThreadAffinityMask" << GetLastError();
+        last = ret;
+    }
+    ~Affinity()
+    {
+        if (last)
+            (void) SetThreadAffinityMask(GetCurrentThread(), last);
+    }
+private:
+    DWORD_PTR last;
+};
+
+#else
+class Affinity {
+public:
+    Affinity() {}
+    ~Affinity() {}
+}
+#endif
diff --git a/opentrack/tracker.cpp b/opentrack/tracker.cpp
index a9475838..1990d613 100644
--- a/opentrack/tracker.cpp
+++ b/opentrack/tracker.cpp
@@ -14,6 +14,7 @@
 
 
 #include "tracker.h"
+#include "opentrack/thread.hpp"
 #include <cmath>
 #include <algorithm>
 
@@ -183,6 +184,8 @@ void Tracker::logic()
 
 void Tracker::run() {
     const int sleep_ms = 3;
+    
+    Affinity thr(CORE_IPC);
 
 #if defined(_WIN32)
     (void) timeBeginPeriod(1);
-- 
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