From f7a943baeab100528b6989bc705748e374444044 Mon Sep 17 00:00:00 2001
From: Richard Frith-MacDonald <rfm@gnu.org>
Date: Sat, 11 Nov 2006 07:14:30 +0000
Subject: [PATCH] Add new duration recording method

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/performance/trunk@24073 72102866-910b-0410-8b05-ffd578937521
---
 ChangeLog      |  7 +++++++
 GSThroughput.h | 12 ++++++++++++
 GSThroughput.m | 34 ++++++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 78d8249..283ed96 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2006-11-11  Richard Frith-Macdonald  <rfm@gnu.org>
+
+	* GSThroughput.h: New ([add:duration:]) method.
+	* GSThroughput.m: Method to add multiple events with a total
+	duration (eg where recording individual event times has too
+	high an overhead).
+
 2006-11-09  Richard Frith-Macdonald  <rfm@gnu.org>
 
 	* GNUmakefile: update version
diff --git a/GSThroughput.h b/GSThroughput.h
index c1ea919..772662b 100644
--- a/GSThroughput.h
+++ b/GSThroughput.h
@@ -99,6 +99,18 @@
  */
 - (void) add: (unsigned)count;
 
+/**
+ * Adds a record for multiple events of the specified
+ * <em>total</em> duration.<br />
+ * This is useful where you know a lot of similar events have completed
+ * in a particular period of time, but can't afford to measure the
+ * duration of the individual events because the timing overheads
+ * would be too great.<br />
+ * You may use this method only if the receiver was initialised with
+ * duration logging turned on.
+ */
+- (void) add: (unsigned)count duration: (NSTimeInterval)length;
+
 /**
  * Adds a record for a single event of the specified duration.<br />
  * You may use this method only if the receiver was initialised with
diff --git a/GSThroughput.m b/GSThroughput.m
index eea6b00..f37f429 100644
--- a/GSThroughput.m
+++ b/GSThroughput.m
@@ -381,6 +381,40 @@ typedef struct {
   cseconds[my->second].cnt += count;
 }
 
+- (void) add: (unsigned)count duration: (NSTimeInterval)length
+{
+  NSAssert(my->supportDurations == YES, @"not configured for durations");
+
+  if (count > 0)
+    {
+      NSTimeInterval	total = length;
+      DInfo		*info;
+
+      info = &dseconds[my->second];
+      length /= count;
+      if (info->cnt == 0)
+	{
+	  info->cnt = count;
+	  info->min = length;
+	  info->max = length;
+	  info->sum = total;
+	}
+      else
+	{
+	  info->cnt += count;
+	  info->sum += total;
+	  if (length > info->max)
+	    {
+	      info->max = length;
+	    }
+	  if (length < info->min)
+	    {
+	      info->min = length;
+	    }
+	}
+    }
+}
+
 - (void) addDuration: (NSTimeInterval)length
 {
   DInfo	*info;