From 1b555ea3b5662787d216a436c2632a5ee48ffbdd Mon Sep 17 00:00:00 2001
From: Gregory Hainaut <gregory.hainaut@gmail.com>
Date: Mon, 24 Nov 2014 23:44:32 +0100
Subject: [PATCH] gsdx-linux: Fix GSdx internal counter on linux

The issue is that clock gives the total cpu time of the process whereas
we want the cpu time of the rendering thread
---
 plugins/GSdx/GSPerfMon.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/plugins/GSdx/GSPerfMon.cpp b/plugins/GSdx/GSPerfMon.cpp
index 80019c7b2d..b80406a220 100644
--- a/plugins/GSdx/GSPerfMon.cpp
+++ b/plugins/GSdx/GSPerfMon.cpp
@@ -37,7 +37,15 @@ void GSPerfMon::Put(counter_t c, double val)
 {
 	if(c == Frame)
 	{
+#ifdef __linux__
+		// clock on linux will return CLOCK_PROCESS_CPUTIME_ID.
+		// CLOCK_THREAD_CPUTIME_ID is much more useful to measure the fps
+		struct timespec ts;
+		clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
+		uint64 now =  (uint64) ts.tv_sec * (uint64) 1e6 + (uint64) ts.tv_nsec / (uint64) 1e3;
+#else
 		clock_t now = clock();
+#endif
 
 		if(m_lastframe != 0)
 		{