Changeset 34048 in webkit for trunk/JavaScriptCore/profiler/ProfileNode.cpp

Timestamp:

May 22, 2008, 9:32:47 PM (17 years ago)

Author:

Adam Roben

Message:

Implement sub-millisecond profiling on Windows

Reviewed by Kevin McCullough.

• profiler/ProfileNode.cpp: (KJS::getCount): Added. On Windows, we use QueryPerformanceCounter. On other platforms, we use getCurrentUTCTimeWithMicroseconds. (KJS::ProfileNode::endAndRecordCall): Use getCount instead of getCurrentUTCTimeWithMicroseconds. (KJS::ProfileNode::startTimer): Ditto.

File:

• trunk/JavaScriptCore/profiler/ProfileNode.cpp (modified) (3 diffs)

trunk/JavaScriptCore/profiler/ProfileNode.cpp

@@ -35 +35 @@
 #include <stdio.h>
 
+#if PLATFORM(WIN_OS)
+#include <windows.h>
+#endif
+
 namespace KJS {
 
 static const char* NonJSExecution = "(idle)";
+
+static double getCount()
+{
+#if PLATFORM(WIN_OS)
+    static LARGE_INTEGER frequency = {0};
+    if (!frequency.QuadPart)
+        QueryPerformanceFrequency(&frequency);
+    LARGE_INTEGER counter;
+    QueryPerformanceCounter(&counter);
+    return static_cast<double>(counter.QuadPart) / frequency.QuadPart;
+#else
+    return getCurrentUTCTimeWithMicroseconds();
+#endif
+}
 
 ProfileNode::ProfileNode(const CallIdentifier& callIdentifier, ProfileNode* headNode, ProfileNode* parentNode)
@@ -298 +316 @@
 void ProfileNode::endAndRecordCall()
 {
-    m_actualTotalTime += getCurrentUTCTimeWithMicroseconds() - m_startTime;
+    m_actualTotalTime += getCount() - m_startTime;
     m_startTime = 0.0;
 
@@ -307 +325 @@
 {
     if (!m_startTime)
-        m_startTime = getCurrentUTCTimeWithMicroseconds();
+        m_startTime = getCount();
 }