Re: [Gems-users] regd creating checkpoints for workloads

[Christian Bienia <cbienia@xxxxxxxxxxxxxxxx>]

Hi,

I'm kind of confused: If you wanna create a checkpoint of a benchmark
with warmed up caches, don't you have to load ruby/opal right from the
beginning? Or does Simics manage the contents of the caches and
ruby/opal just hook in? What else is ruby's load-caches parameter for if
not for creating checkpoints?

Chris


On Tue, 2005-06-21 at 16:47, Mike Marty wrote:
> Also you may want to look into using Simics in "fast mode", or
> emulation-only mode for setting up checkpoints.  Supposedly the slowdown
> is only 8-10x over a real machine.  However no timing modules can be
> loaded in this mode.
> 
> --Mike
> 
> 
> > Brinda,
> >
> > If you know how many instructions you want to run, you can continue simics for
> > this same number of steps:
> >
> > c NUMBER_OF_INSTRUCTIONS
> >
> > and then take a checkpoint. You can load from this checkpoint and then run
> > with Ruby/Opal for another number of steps. Please see the
> > $GEMS_ROOT/gen-scripts/mfacet.py script for how we do it with magic
> > instructions, but you can change the script to run for a certain number of
> > steps.
> >
> > -Alaa
> >
> > Brinda Ganesh wrote:
> > > Hi
> > >
> > > I want to create checkpoints and cache warmup dumps
> > > for the spec cpu 2000 workloads past the
> > > initialization points or after the initial 10 million
> > > instructions.
> > >
> > > In order to create these checkpoints it seemed to me
> > > that one would have to compile in magic instructions
> > > for each benchmark which get triggered at start-up or
> > > at an appropriate point. Then you step the correct
> > > number of instructions and dump the cache.
> > >
> > > I wanted to know if there was a technique which would
> > > not require using the magic instruction framework and
> > > recompilation of the benchmarks.
> > > For eg. is there is a way in the  simics interface/
> > > opal interface - by which I can start benchmark run on
> > > the simulated processor and run it for the appropriate
> > > number of instructions. and thus not have to use the
> > > os command line to start the application.
> > >
> > > Thanks in advance
> > > Brinda
> > >
> > >
> > >
> > >
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