From a0da06c306f4c106136909ad149204005fe82ab1 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Sat, 3 May 2014 18:25:19 +0100
Subject: [profile] Provide methods for profiling individual stages of
 operations

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 src/include/ipxe/profile.h | 42 +++++++++++++++++++++++++++++++++++-------
 1 file changed, 35 insertions(+), 7 deletions(-)

(limited to 'src/include')

diff --git a/src/include/ipxe/profile.h b/src/include/ipxe/profile.h
index 0b15fe545..d4fc4f90f 100644
--- a/src/include/ipxe/profile.h
+++ b/src/include/ipxe/profile.h
@@ -9,7 +9,6 @@
 
 FILE_LICENCE ( GPL2_OR_LATER );
 
-#include <stdint.h>
 #include <bits/profile.h>
 #include <ipxe/tables.h>
 
@@ -26,7 +25,9 @@ struct profiler {
 	/** Name */
 	const char *name;
 	/** Start timestamp */
-	uint64_t started;
+	unsigned long started;
+	/** Stop timestamp */
+	unsigned long stopped;
 	/** Number of samples */
 	unsigned int count;
 	/** Mean sample value (scaled) */
@@ -62,6 +63,20 @@ extern unsigned long profile_mean ( struct profiler *profiler );
 extern unsigned long profile_variance ( struct profiler *profiler );
 extern unsigned long profile_stddev ( struct profiler *profiler );
 
+/**
+ * Start profiling
+ *
+ * @v profiler		Profiler
+ * @v started		Start timestamp
+ */
+static inline __attribute__ (( always_inline )) void
+profile_start_at ( struct profiler *profiler, unsigned long started ) {
+
+	/* If profiling is active then record start timestamp */
+	if ( PROFILING )
+		profiler->started = started;
+}
+
 /**
  * Start profiling
  *
@@ -72,23 +87,36 @@ profile_start ( struct profiler *profiler ) {
 
 	/* If profiling is active then record start timestamp */
 	if ( PROFILING )
-		profiler->started = profile_timestamp();
+		profile_start_at ( profiler, profile_timestamp() );
 }
 
 /**
  * Record profiling result
  *
  * @v profiler		Profiler
+ * @v stopped		Stop timestamp
  */
 static inline __attribute__ (( always_inline )) void
-profile_stop ( struct profiler *profiler ) {
-	uint64_t ended;
+profile_stop_at ( struct profiler *profiler, unsigned long stopped ) {
 
 	/* If profiling is active then record end timestamp and update stats */
 	if ( PROFILING ) {
-		ended = profile_timestamp();
-		profile_update ( profiler, ( ended - profiler->started ) );
+		profiler->stopped = stopped;
+		profile_update ( profiler, ( stopped - profiler->started ) );
 	}
 }
 
+/**
+ * Record profiling result
+ *
+ * @v profiler		Profiler
+ */
+static inline __attribute__ (( always_inline )) void
+profile_stop ( struct profiler *profiler ) {
+
+	/* If profiling is active then record end timestamp and update stats */
+	if ( PROFILING )
+		profile_stop_at ( profiler, profile_timestamp() );
+}
+
 #endif /* _IPXE_PROFILE_H */
-- 
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