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44fae8b193
Remove performance comparing with hardcoded value. Test cases for performance of some commands were moved to perf group. Updated documentation.
128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
// Created on: 2018-03-15
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// Created by: Stephan GARNAUD (ARM)
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// Copyright (c) 1998-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _OSD_Chronometer_HeaderFile
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#define _OSD_Chronometer_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <Standard_Boolean.hxx>
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#include <Standard_Real.hxx>
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#include <Standard_OStream.hxx>
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//! This class measures CPU time (both user and system) consumed
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//! by current process or thread. The chronometer can be started
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//! and stopped multiple times, and measures cumulative time.
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//!
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//! If only the thread is measured, calls to Stop() and Show()
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//! must occur from the same thread where Start() was called
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//! (unless chronometer is stopped); otherwise measurement will
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//! yield false values.
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class OSD_Chronometer
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Initializes a stopped Chronometer.
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//!
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//! If ThisThreadOnly is True, measured CPU time will account
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//! time of the current thread only; otherwise CPU of the
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//! process (all threads, and completed children) is measured.
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Standard_EXPORT OSD_Chronometer(const Standard_Boolean ThisThreadOnly = Standard_False);
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Standard_EXPORT virtual ~OSD_Chronometer();
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//! Return true if timer has been started.
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Standard_Boolean IsStarted() const { return !Stopped; }
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//! Stops and Reinitializes the Chronometer.
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Standard_EXPORT virtual void Reset();
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//! Restarts the Chronometer.
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Standard_EXPORT virtual void Restart();
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//! Stops the Chronometer.
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Standard_EXPORT virtual void Stop();
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//! Starts (after Create or Reset) or restarts (after Stop)
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//! the chronometer.
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Standard_EXPORT virtual void Start();
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//! Shows the current CPU user and system time on the
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//! standard output stream <cout>.
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//! The chronometer can be running (laps Time) or stopped.
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Standard_EXPORT virtual void Show() const;
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//! Shows the current CPU user and system time on the output
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//! stream <os>.
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//! The chronometer can be running (laps Time) or stopped.
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Standard_EXPORT virtual void Show (Standard_OStream& os) const;
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//! Returns the current CPU user time in a variable.
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//! The chronometer can be running (laps Time) or stopped.
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Standard_EXPORT void Show (Standard_Real& theUserSeconds) const;
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//! Returns the current CPU user and system time in variables.
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//! The chronometer can be running (laps Time) or stopped.
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Standard_EXPORT void Show (Standard_Real& theUserSeconds, Standard_Real& theSystemSeconds) const;
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//! Returns CPU time (user and system) consumed by the current
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//! process since its start, in seconds. The actual precision of
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//! the measurement depends on granularity provided by the system,
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//! and is platform-specific.
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Standard_EXPORT static void GetProcessCPU (Standard_Real& UserSeconds, Standard_Real& SystemSeconds);
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//! Returns CPU time (user and system) consumed by the current
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//! thread since its start. Note that this measurement is
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//! platform-specific, as threads are implemented and managed
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//! differently on different platforms and CPUs.
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Standard_EXPORT static void GetThreadCPU (Standard_Real& UserSeconds, Standard_Real& SystemSeconds);
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protected:
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Standard_Boolean Stopped;
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private:
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Standard_Boolean ThreadOnly;
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Standard_Real Start_user;
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Standard_Real Start_sys;
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Standard_Real Cumul_user;
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Standard_Real Cumul_sys;
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};
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#endif // _OSD_Chronometer_HeaderFile
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