[gambit-list] Gambit on Raspberry Pi 2 B

Álvaro Castro-Castilla alvaro.castro.castilla at gmail.com
Tue Mar 10 05:53:25 EDT 2015


> >
> > And on an experiment in spectral identification that mainly does F64
> inner products, I get with the default build
> >
> > (time (run-experiment-and-graph 5))
> >   785617 ms real time
> >   785590 ms cpu time (785040 user, 550 system)
> >   33 collections accounting for 442 ms real time (350 user, 80 system)
> >   3216061748 bytes allocated
> >   30338 minor faults
> >   no major faults
> >
> > and with the gcc-4.8 build I get
> >
> >> (time (run-experiment-and-graph 5))
> > (time (run-experiment-and-graph 5))
> >    739829 ms real time
> >    739790 ms cpu time (739620 user, 170 system)
> >    33 collections accounting for 292 ms real time (310 user, 0 system)
> >    3216060588 bytes allocated
> >    17663 minor faults
> >    no major faults
>
> using -fstrict-aliasing didn’t help the spectral identification code much:
>
> > (time (run-experiment-and-graph 5))
> (time (run-experiment-and-graph 5))
>     733849 ms real time
>     733750 ms cpu time (733330 user, 420 system)
>     33 collections accounting for 219 ms real time (210 user, 0 system)
>     3216086556 bytes allocated
>     16938 minor faults
>     no major faults
>


Awesome project! Raspberry Pi is truly a wonderful machine. Thank you for
posting your results.
Since I don't have a reference performance, is this 20x difference expected
or more than expected? Based on other tests with very different
environments on mobile ARM, I would say that it should be on the 10x-50x
ballpark.
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