Re: [Gems-users] Ocean and Simics+Ruby

["Daniele Bordes" <daniele.bordes@xxxxxxxxx>]

Thank you Dan for your reply. Well, I am using Simics 2.2.17 and I
start it with command line "./simics" without additional options. Does
Simics 2.2.17 perform fast-mode simulations by default?

2006/9/26, Dan Gibson <degibson@xxxxxxxx>:
> More on this:
> Simics in "fast mode" is now VERY fast relative to simics with a timing
> model (like Ruby and/or Opal). Read: no longer a 15x difference. This
> applies to Simics 2.2.19 in "fast mode" and 3.0.X in default (non-stall)
> mode.
>
> Are you starting ocean from the beginning? It might be wise to only run
> Ruby for the "parallel" section of opal -- a MAGIC_BREAKPOINT inserted
> right after the thread_fork() calls would be an ideal way to signal the
> start of the section.
>
> Regards,
> Dan
>
> Daniele Bordes wrote:
> > Hi all. I am trying to run some simulations of Ocean Benchmark over a
> > Solaris/Sparc simulated machine (8 processors, 1GB of Ram) using Simics +
> Ruby.
> > The configuration of the simulated machine was taken from donut directory.
> >
> > The host machine (over which Simics runs) is an Intel XEON 3.40 Ghz
> > with 4GB of RAM. The problem is that 18 hours where sufficient only to
> > obtain the first two lines of Multigrid Output (total is 13 lines) of
> > Ocean, which was launched with 66x66 grid dimension and only one
> > thread.
> > Instead, using only Simics without Ruby, the simulation of Ocean
> > finishes in less than three minutes.
> >
> > Well, did anybody simulate Ocean using Simics+Ruby? How did it take to
> > complete the simulation?
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