Working on heterogeneous platforms we need to use the system call gettimeofday. This function is portable and it measures ELAPSED time and CPU time in seconds and microseconds. Example: OSD_Timer aTimer; aTimer.Start(); // Start the timers (t1). ..... // Do something. aTimer.Stop(); // Stop the timers (t2). aTimer.Show(); // Give the elapsed time between t1 and t2. // Give also the process CPU time between // t1 and t2. More...
#include <OSD_Timer.hxx>
Public Member Functions | |
| OSD_Timer () | |
| Builds a Chronometer initialized and stopped. More... | |
| virtual void | Reset () |
| Stops and reinitializes the timer. More... | |
| virtual void | Show () const |
| Shows both the elapsed time and CPU time on the standard output stream <cout>.The chronometer can be running (Lap Time) or stopped. More... | |
| virtual void | Show (Standard_OStream &os) const |
| Shows both the elapsed time and CPU time on the output stream <OS>. More... | |
| void | Show (Standard_Real &theSeconds, Standard_Integer &theMinutes, Standard_Integer &theHours, Standard_Real &theCPUtime) const |
| returns both the elapsed time(seconds,minutes,hours) and CPU time. More... | |
| virtual void | Stop () |
| Stops the Timer. More... | |
| virtual void | Start () |
| Starts (after Create or Reset) or restarts (after Stop) the Timer. More... | |
| Standard_Real | ElapsedTime () const |
| Returns elapsed time in seconds. More... | |
 Public Member Functions inherited from OSD_Chronometer | |
| OSD_Chronometer (const Standard_Boolean ThisThreadOnly=Standard_False) | |
| Initializes a stopped Chronometer. More... | |
| virtual | ~OSD_Chronometer () |
| void | Show (Standard_Real &theUserSeconds) const |
| Returns the current CPU user time in a variable. The chronometer can be running (laps Time) or stopped. More... | |
| void | Show (Standard_Real &theUserSeconds, Standard_Real &theSystemSeconds) const |
| Returns the current CPU user and system time in variables. The chronometer can be running (laps Time) or stopped. More... | |
Additional Inherited Members | |
| Static Public Member Functions inherited from OSD_Chronometer | |
| static void | GetProcessCPU (Standard_Real &UserSeconds, Standard_Real &SystemSeconds) |
| Returns CPU time (user and system) consumed by the current process since its start, in seconds. The actual precision of the measurement depends on granularity provided by the system, and is platform-specific. More... | |
| static void | GetThreadCPU (Standard_Real &UserSeconds, Standard_Real &SystemSeconds) |
| Returns CPU time (user and system) consumed by the current thread since its start. Note that this measurement is platform-specific, as threads are implemented and managed differently on different platforms and CPUs. More... | |
| Protected Attributes inherited from OSD_Chronometer | |
| Standard_Boolean | Stopped |
Detailed Description
Working on heterogeneous platforms we need to use the system call gettimeofday. This function is portable and it measures ELAPSED time and CPU time in seconds and microseconds. Example: OSD_Timer aTimer; aTimer.Start(); // Start the timers (t1). ..... // Do something. aTimer.Stop(); // Stop the timers (t2). aTimer.Show(); // Give the elapsed time between t1 and t2. // Give also the process CPU time between // t1 and t2.
Constructor & Destructor Documentation
| OSD_Timer::OSD_Timer | ( | ) |
Builds a Chronometer initialized and stopped.
Member Function Documentation
| Standard_Real OSD_Timer::ElapsedTime | ( | ) | const |
Returns elapsed time in seconds.
|
virtual |
Stops and reinitializes the timer.
Reimplemented from OSD_Chronometer.
|
virtual |
Shows both the elapsed time and CPU time on the standard output stream <cout>.The chronometer can be running (Lap Time) or stopped.
Reimplemented from OSD_Chronometer.
|
virtual |
Shows both the elapsed time and CPU time on the output stream <OS>.
Reimplemented from OSD_Chronometer.
| void OSD_Timer::Show | ( | Standard_Real & | theSeconds, |
| Standard_Integer & | theMinutes, | ||
| Standard_Integer & | theHours, | ||
| Standard_Real & | theCPUtime | ||
| ) | const |
returns both the elapsed time(seconds,minutes,hours) and CPU time.
|
virtual |
Starts (after Create or Reset) or restarts (after Stop) the Timer.
Reimplemented from OSD_Chronometer.
|
virtual |
Stops the Timer.
Reimplemented from OSD_Chronometer.
The documentation for this class was generated from the following file:
