[ts-7000] Re: Interval measurement in TS-7400

["gebbet00" <>]

--- In  Jim Jackson <> wrote:
>
> 
> 
> 
> On Thu, 17 Apr 2008, gebbet00 wrote:
> 
> > What's the correct way to do interval measurement in TS-7400? I want
> > to know what amount of thime certain code is taking to be
executed. I do
> >
> > gettimeofday( &init_struct, NULL );
> > ...
> > code
> > ...
> > gettimeofday( &end_struct, NULL );
> >
> > but when I check tv_sec and tv_usec, values are always the same for
> > init_struct and end_struct, no matter how short or long the
> > intermediate routine is. Why?
> 
> I suspect you have a bug in your code. But cannot tell without
seeing it.
> 
> Here's some code I've used to do this....
> 
>   gettimeofday(&start, &tz);
> 
>   .... do stuff...
> 
>   gettimeofday(&tm, &tz);
> 
>   t=tm.tv_sec-start.tv_sec;
>   t2=(tm.tv_usec-start.tv_usec)/1000;
>   if (t2<0) { t2+=1000; t--; }
>   printf("%d.%03d ",t,t2);
>

...that you've used in a TS-7400? I've used the same in i386 and
x86_64 systems and of course it works OK. Problem is on TS-7400.
tv_usec has the same value in start and tm.

I wanted to ask before diving into it.


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