Re: [C400-L] How to calculate process duration?

[Bruce Vining <bvining@xxxxxxxxxx>]

I suspect you are looking at some old documentation as several releases ago
the MI timestamp was enhanced with 8 microsecond granularity.  As for
converting to more readable formats, the Convert Date and Time API
(QWCCVTDT) can handle that with an input format of *DTS.

Bruce Vining



                                                                           
             "Jevgeni                                                      
             Astanovski"                                                   
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             ining=us.ibm.com@                                     Subject 
             midrange.com              [C400-L] How to calculate process   
                                       duration?                           
                                                                           
             04/18/2005 07:39                                              
             AM                                                            
                                                                           
                                                                           
             Please respond to                                             
               C programming                                               
              iSeries / AS400                                              
                                                                           
                                                                           




My problem is how to get duration of a certain part of the program.
It is my program and I'll put timestamping into it myself.

So idea is:

.....
time(&Time1) ;
processing...
processing...
processing...
time(&Time2) ;
Duration = GetTimeDifference(Time1, Time2) ;

But I know, that the processing takes surely less than a second, so time()
function, returning seconds is not OK.

Looked at mattod(). It is said, that it's tick is 1/1000 sec. Fine. But
isn't there somewhere a way to convert _MI_Time to something usable? Or if
not, can anyone tell me, what are the arithmetical rules for _MI_Time - I
need to subtract one from another?


I did some bit fiddling and finally got a piece, that seems to work, but it
is really ugly:

mattod(Time1) ;
    mitime(&WaitTime, 0, 0, 0, 50) ;  /*hours,minutes,seconds,1/100*/
    waittime(&WaitTime, _WAIT_NORMAL) ;
mattod(Time2) ;
memcpy(Buf, &Time1, 8) ;
memcpy(&Tim11, Buf, 4) ;
memcpy(&TimShift, &Buf[4], 4) ;
Tim12 = TimShift >> 22 ;
memcpy(Buf, &Time2, 8) ;
memcpy(&Tim21, Buf, 4) ;
memcpy(&TimShift, &Buf[4], 4) ;
Tim22 = TimShift >> 22 ;
Diff = (Tim21 - Tim11) * 1000 + Tim22 - Tim12 ;
printf("Diff : %d ms\n", Diff) ;

The idea of mitime and waittime is simply to compare printed result to
500ms delay.
Isn't it ugly?
Is it the only way?

TIA,

Jevgeni Astanovski

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