init: init nachos hw01, should pass jenkins os_group_20_hw job but fail on os_group_20_ta job

code/machine/stats.cc

@@ -0,0 +1,45 @@
+// stats.h 
+//	Routines for managing statistics about Nachos performance.
+//
+// DO NOT CHANGE -- these stats are maintained by the machine emulation.
+//
+// Copyright (c) 1992-1996 The Regents of the University of California.
+// All rights reserved.  See copyright.h for copyright notice and limitation 
+// of liability and disclaimer of warranty provisions.
+
+#include "copyright.h"
+#include "debug.h"
+#include "stats.h"
+
+//----------------------------------------------------------------------
+// Statistics::Statistics
+// 	Initialize performance metrics to zero, at system startup.
+//----------------------------------------------------------------------
+
+Statistics::Statistics()
+{
+    totalTicks = idleTicks = systemTicks = userTicks = 0;
+    numDiskReads = numDiskWrites = 0;
+    numConsoleCharsRead = numConsoleCharsWritten = 0;
+    numPageFaults = numPacketsSent = numPacketsRecvd = 0;
+}
+
+//----------------------------------------------------------------------
+// Statistics::Print
+// 	Print performance metrics, when we've finished everything
+//	at system shutdown.
+//----------------------------------------------------------------------
+
+void
+Statistics::Print()
+{
+    cout << "Ticks: total " << totalTicks << ", idle " << idleTicks;
+		cout << ", system " << systemTicks << ", user " << userTicks <<"\n";
+    cout << "Disk I/O: reads " << numDiskReads;
+		cout << ", writes " << numDiskWrites << "\n";
+		cout << "Console I/O: reads " << numConsoleCharsRead;
+    cout << ", writes " << numConsoleCharsWritten << "\n";
+    cout << "Paging: faults " << numPageFaults << "\n";
+    cout << "Network I/O: packets received " << numPacketsRecvd;
+		cout << ", sent " << numPacketsSent << "\n";
+}