From: Pierre-Marc Fournier <pierre-marc.fournier@polymtl.ca>
Date: Thu, 30 Jul 2009 19:30:50 +0000 (-0400)
Subject: change to tsc trace clock
X-Git-Tag: v1.9.1~942
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=5f0046615cbb4f36d0c70199b40df7537e438198;p=lttng-ust.git

change to tsc trace clock
---

diff --git a/share/kernelcompat.h b/share/kernelcompat.h
index 57d12f83..fada46f0 100644
--- a/share/kernelcompat.h
+++ b/share/kernelcompat.h
@@ -152,31 +152,31 @@ static __inline__ int get_count_order(unsigned int count)
 
 /* TRACE CLOCK */
 
-//ust// static inline u64 trace_clock_read64(void)
-//ust// {
-//ust// 	uint32_t low;
-//ust// 	uint32_t high;
-//ust// 	uint64_t retval;
-//ust// 	__asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
-//ust// 
-//ust// 	retval = high;
-//ust// 	retval <<= 32;
-//ust// 	return retval | low;
-//ust// }
-
 static inline u64 trace_clock_read64(void)
 {
-	struct timeval tv;
-	u64 retval;
-
-	gettimeofday(&tv, NULL);
-	retval = tv.tv_sec;
-	retval *= 1000000;
-	retval += tv.tv_usec;
-
-	return retval;
+	uint32_t low;
+	uint32_t high;
+	uint64_t retval;
+	__asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
+
+	retval = high;
+	retval <<= 32;
+	return retval | low;
 }
 
+//static inline u64 trace_clock_read64(void)
+//{
+//	struct timeval tv;
+//	u64 retval;
+//
+//	gettimeofday(&tv, NULL);
+//	retval = tv.tv_sec;
+//	retval *= 1000000;
+//	retval += tv.tv_usec;
+//
+//	return retval;
+//}
+
 static inline u64 trace_clock_frequency(void)
 {
 	return 1000000LL;