Kulwinder Atwal wrote:
> shaolin zhang wrote:
> > some result is:
> Linux pSOS VxWorks
>
> > for(;;) for local variable: 0.52 usec/times 23.81 usec/times 4.79
>usec/times
> > for(;;) for global variable: 0.48 usec/times 9.58 usec/times 3.99
>usec/times
> > while() for local variable: 0.57 usec/times 11.90 usec/times 5.78
>usec/times
> > while() for global variable: 0.445 usec/times 11.90 usec/times 3.97
>usec/times
>
> Does not a lower time mean it runs faster?
> It sounds like linux is running faster than pSOS and VxWorks.
At least, it is rather unclear what the meassured values
want to say anyway: how do you messure the execution time
of an endless loop? :-)
Do you think this "Empty-Loop-Benchmarks" say anything usefull for
a more complex application? I doupt, your main application
is an endless loop without content (maybe, you posted the whole
stuff in the linuxppc-mailinglist, but definitly not at
the RTL-Mailinglist)
BTW: RTLinux will not speed up the execution time of loops. This
only depends on the compiler. RTLinux just reduces latencies&jitters
and gives you guaranteed response times.
Please, can you be a little more specific and tell us exactly
how you did you performace tests including the code?
Bernhard
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