Re: [Gems-users] opal stats qn

[Luke Yen <lyen@xxxxxxxxxxx>]

On Wed, 21 Feb 2007 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?
>

   You are correct on both parts.

  Luke

> 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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> >>
> >
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> >
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