From: loizides <loizides@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Thu, 11 Jul 2002 10:29:20 +0000 (+0000)
Subject: Class for timing measurements, taken from ROOT and made changes to compile it without... 
X-Git-Url: http://git.uio.no/git/?a=commitdiff_plain;h=4d0891ddeaa598d0e251a1315ffd5a93a389aee9;p=u%2Fmrichter%2FAliRoot.git

Class for timing measurements, taken from ROOT and made changes to compile it without ROOT/ALIROOT.
---

diff --git a/HLT/misc/AliL3Stopwatch.cxx b/HLT/misc/AliL3Stopwatch.cxx
new file mode 100644
index 00000000000..b91157ccc38
--- /dev/null
+++ b/HLT/misc/AliL3Stopwatch.cxx
@@ -0,0 +1,155 @@
+// $Id$
+// Author: C. Loizides <mailto:loizides@ikf.physik.uni-frankfurt.de>
+
+
+/** \class AliL3Stopwatch
+//<pre>
+//----------------------------------------------------
+// AliL3Stopwatch
+//
+// Stopwatch class. This class returns the real and cpu time between   
+// the start and stop events (taken from Root)
+//</pre>
+*/
+
+#include "AliL3Stopwatch.h"
+
+#ifdef no_root
+#include <stream.h>
+
+ClassImp(AliL3Stopwatch)
+
+clock_t AliL3Stopwatch::gTicks = 0;
+
+AliL3Stopwatch::AliL3Stopwatch()
+{
+  // Create a stopwatch and start it.
+  if (!gTicks) gTicks = (clock_t)sysconf(_SC_CLK_TCK);
+  fState         = kUndefined;
+  fTotalCpuTime  = 0;
+  fTotalRealTime = 0;
+  fCounter       = 0;
+  Start();
+}
+
+AliL3Stopwatch::~AliL3Stopwatch()
+{
+}
+
+void AliL3Stopwatch::Start(Bool_t reset)
+{
+  // Start the stopwatch. If reset is kTRUE reset the stopwatch before
+  // starting it (including the stopwatch counter).
+  // Use kFALSE to continue timing after a Stop() without
+  // resetting the stopwatch.
+
+  if (reset) {
+    fTotalCpuTime  = 0;
+      fTotalRealTime = 0;
+      fCounter       = 0;
+  }
+  if (fState != kRunning) {
+    fStartRealTime = GetRealTime();
+    fStartCpuTime  = GetCPUTime();
+  }
+  fState = kRunning;
+  fCounter++;
+}
+
+void AliL3Stopwatch::Stop()
+{
+   // Stop the stopwatch.
+   fStopRealTime = GetRealTime();
+   fStopCpuTime  = GetCPUTime();
+   if (fState == kRunning) {
+     fTotalCpuTime  += fStopCpuTime  - fStartCpuTime;
+     fTotalRealTime += fStopRealTime - fStartRealTime;
+   }
+   fState = kStopped;
+}
+
+void AliL3Stopwatch::Continue()
+{
+  // Resume a stopped stopwatch. The stopwatch continues counting from the last
+  // Start() onwards (this is like the laptimer function).
+  
+  if (fState == kUndefined){
+    cerr << "Error in AliL3Stopwatch::Continue! Stopwatch not started." << endl;
+    return;
+  }
+
+  if (fState == kStopped) {
+    fTotalCpuTime  -= fStopCpuTime  - fStartCpuTime;
+    fTotalRealTime -= fStopRealTime - fStartRealTime;
+  }
+
+  fState = kRunning;
+}
+
+Double_t AliL3Stopwatch::RealTime()
+{
+  // Return the realtime passed between the start and stop events. If the
+  // stopwatch was still running stop it first.
+  
+  if (fState == kUndefined){
+    cerr << "Error in AliL3Stopwatch::RealTime! Stopwatch not started." << endl;
+    return -1.0;
+  }
+
+  if (fState == kRunning)
+    Stop();
+
+  return fTotalRealTime;
+}
+
+Double_t AliL3Stopwatch::CpuTime()
+{
+  // Return the cputime passed between the start and stop events. If the
+  // stopwatch was still running stop it first.
+  
+  if (fState == kUndefined){
+    cerr << "Error in AliL3Stopwatch::CpuTime! Stopwatch not started." << endl;
+    return -1.0;
+  }
+  if (fState == kRunning)
+    Stop();
+
+  return fTotalCpuTime;
+}
+
+Double_t AliL3Stopwatch::GetRealTime()
+{
+  struct tms cpt;
+  Double_t trt =  (Double_t)times(&cpt);
+  return trt / (Double_t)gTicks;
+}
+
+Double_t AliL3Stopwatch::GetCPUTime()
+{
+   struct tms cpt;
+   times(&cpt);
+   return (Double_t)(cpt.tms_utime+cpt.tms_stime) / gTicks;
+}
+
+//______________________________________________________________________________
+void AliL3Stopwatch::Print(Char_t *opt="") const
+{
+   // Print the real and cpu time passed between the start and stop events.
+   // and the number of times (slices) this TStopwatch was called
+   // (if this number > 1)
+
+   Double_t  realt = ((AliL3Stopwatch*)(this))->RealTime();
+
+   Int_t  hours = Int_t(realt / 3600);
+   realt -= hours * 3600;
+   Int_t  min   = Int_t(realt / 60);
+   realt -= min * 60;
+   Int_t  sec   = Int_t(realt);
+   Int_t counter = Counter();
+   if (counter <= 1 )
+      printf("Real time %d:%d:%d, CP time %.3f", hours, min, sec, ((AliL3Stopwatch*)(this))->CpuTime());
+   else
+      printf("Real time %d:%d:%d, CP time %.3f, %d slices", hours, min, sec, ((AliL3Stopwatch*)(this))->CpuTime(),counter);
+}
+
+#endif
diff --git a/HLT/misc/AliL3Stopwatch.h b/HLT/misc/AliL3Stopwatch.h
new file mode 100644
index 00000000000..b4dc7feaeea
--- /dev/null
+++ b/HLT/misc/AliL3Stopwatch.h
@@ -0,0 +1,51 @@
+#ifndef ALIL3_Stopwatch
+#define ALIL3_Stopwatch
+
+#ifndef no_root
+#include <TStopwatch.h>
+typedef TStopwatch AliL3Stopwatch; 
+
+#else
+#include <sys/types.h>
+#include <sys/times.h>
+#include <unistd.h>
+#include "AliL3RootTypes.h"
+
+class AliL3Stopwatch
+{
+ private:
+  static clock_t gTicks;
+  enum EState { kUndefined, kStopped, kRunning };
+
+  Double_t     fStartRealTime;   //wall clock start time
+  Double_t     fStopRealTime;    //wall clock stop time
+  Double_t     fStartCpuTime;    //cpu start time
+  Double_t     fStopCpuTime;     //cpu stop time
+  Double_t     fTotalCpuTime;    //total cpu time
+  Double_t     fTotalRealTime;   //total real time
+  EState       fState;           //stopwatch state
+  Int_t        fCounter;         //number of times the stopwatch was started
+
+ public:
+  
+  AliL3Stopwatch();
+  ~AliL3Stopwatch();
+  void        Start(Bool_t reset = kTRUE);
+  void        Stop();
+  void        Continue();
+  Int_t       Counter() const { return fCounter; }
+  Double_t    RealTime();
+  void        Reset() { ResetCpuTime(); ResetRealTime(); }
+  void        ResetCpuTime (Double_t time = 0) { Stop(); fTotalCpuTime  = time; }
+  void        ResetRealTime(Double_t time = 0) { Stop(); fTotalRealTime = time; }
+  Double_t    CpuTime();
+  void        Print(Char_t *opt="") const;
+  static Double_t GetRealTime();
+  static Double_t GetCPUTime();
+
+  ClassDef(TStopwatch,1)  //A stopwatch which times real and cpu time
+};
+
+#endif
+
+#endif