Re: [Gems-users] opal stats qn

[Dan Gibson <degibson@xxxxxxxx>]

Approximate cycle per sec =
Approximate number of target cycles that your host simulates in 1 second.

Regards,
Dan

sudrang@xxxxxxxxxxxx wrote:
> Hmmm...Just to make sure i understand this correctly, total number of
> cycles is that of the target machine(the one for which i wrote a opal
> config) and the approximate cycles per sec is the number of cycles of that
> target machine that hte host machine can simulate every sec?
>
> Thanks,
> Sudharsan
>
>   
> > Approximate cycle per sec = Total number of cycles / Total Elapsed Time
> >
> > Approximate cycle per sec is a measure of host performance, not target
> > performance.
> >
> > Regards,
> > Dan
> >
> > sudrang@xxxxxxxxxxxx wrote:
> >     
> > > Hello,
> > > Im confused a bit abt the runtime stats of opal.
> > >
> > > [0] *** Runtime statistics:
> > > [0]   Total number of instructions                        641511246
> > > [0]   Total number of cycles                              397438255
> > > [0]   number of continue calls                            641511246
> > > [0]   Instruction per cycle:                             1.61412
> > > [0]   Total Elapsed Time:                                31523 sec 0
> > > usec
> > > [0]   Total Retirement Time:                             17325 sec
> > > 571864
> > > usec
> > > [0]   Approximate cycle per sec:                         12607.5
> > > [0]   Approximate instructions per sec:                  20349.9
> > > [0]   This processor's Simics overhead (retire/elapsed):  54.96%
> > >
> > > The approximate cycle per sec confuses me. Where did this number come
> > > from?
> > > My configuration file models an alpha 21264 at 466Mhz(This is irrelevant
> > > given that we talk in terms of cycles everywhere), my target
> > > pc(serengeti)
> > > has a frequency of 75 Mhz and my host pc runs at 3Ghz.
> > > I just need execution time for the benchmark, the total number of cycles
> > > here are for the actual benchmark on the target machine..right(I dont
> > > want
> > > the work done by the host machine)?
> > >
> > > Thanks,
> > > Sudharsan
> > >
> > >
> > > Thanks,
> > > Sudharsan
> > >
> > >
> > >
> > >
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