From a31738f6f1473f4f621bc16513ed0c6024749389 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Thu, 30 Jan 2014 18:37:30 +0100
Subject: Main, OutputThread: increase kernel timer slack (Linux)

Allows the kernel to combine timer wakeups with other processes,
reducing power usage.
---
 src/Main.cxx | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/Main.cxx')

diff --git a/src/Main.cxx b/src/Main.cxx
index f8f7a6545..ab70c875c 100644
--- a/src/Main.cxx
+++ b/src/Main.cxx
@@ -60,6 +60,7 @@
 #include "util/Error.hxx"
 #include "util/Domain.hxx"
 #include "thread/Id.hxx"
+#include "thread/Slack.hxx"
 #include "config/ConfigGlobal.hxx"
 #include "config/ConfigData.hxx"
 #include "config/ConfigDefaults.hxx"
@@ -523,6 +524,10 @@ int mpd_main(int argc, char *argv[])
 	win32_app_started();
 #endif
 
+	/* the MPD frontend does not care about timer slack; set it to
+	   a huge value to allow the kernel to reduce CPU wakeups */
+	SetThreadTimerSlackMS(100);
+
 	/* run the main loop */
 	main_loop->Run();
 
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