Lower the compiler background thread priority.

leerproject · Jan 22, 2019 · 2db1d51 · 2db1d51
1 parent 8048f96
commit 2db1d51
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Showing 2 changed files with 28 additions and 1 deletion.
diff --git a/libethash-cl/CLMiner.cpp b/libethash-cl/CLMiner.cpp
@@ -870,7 +870,21 @@ void CLMiner::asyncCompile()
 {
     auto saveName = getThreadName();
     setThreadName(name().c_str());
+
+#if defined(__linux__)
+    // Non Posix hack to lower compile thread's priority. Under POSIX
+    // the nice value is a process attribute, under Linux it's a thread
+    // attribute
+    if (nice(5) == -1)
+        cllog << "Unable to lower compiler priority.";
+#endif
+#ifdef WIN32
+    if (!SetThreadPriority(m_compileThread->native_handle(), THREAD_PRIORITY_BELOW_NORMAL))
+        cllog << "Unable to lower compiler priority.";
+#endif
+
     compileKernel(m_nextProgpowPeriod, m_nextProgram, m_nextSearchKernel);
+
     setThreadName(saveName.c_str());
 }
 

diff --git a/libethash-cuda/CUDAMiner.cpp b/libethash-cuda/CUDAMiner.cpp
@@ -332,10 +332,23 @@ void CUDAMiner::enumDevices(std::map<string, DeviceDescriptor>& _DevicesCollecti
 
 void CUDAMiner::asyncCompile()
 {
-    cuCtxSetCurrent(m_context);
     auto saveName = getThreadName();
     setThreadName(name().c_str());
 
+#if defined(__linux__)
+    // Non Posix hack to lower compile thread's priority. Under POSIX
+    // the nice value is a process attribute, under Linux it's a thread
+    // attribute
+    if (nice(5) == -1)
+        cudalog << "Unable to lower compiler priority.";
+#endif
+#ifdef WIN32
+    if (!SetThreadPriority(m_compileThread->native_handle(), THREAD_PRIORITY_BELOW_NORMAL))
+        cudalog << "Unable to lower compiler priority.";
+#endif
+
+    cuCtxSetCurrent(m_context);
+
     compileKernel(m_nextProgpowPeriod, m_epochContext.dagNumItems / 2, m_kernel[m_kernelCompIx]);
 
     setThreadName(saveName.c_str());