Re: [Gems-users] checkpoints with ruby

[yilmazer@xxxxxxxxxxx]

May I ask a question relating to this?
Can we use the same warmup files for different cache configurations and
different protocols, different number of processors? 
Thanks,

Quoting Mike Marty <mikem@xxxxxxxxxxx>:

> load-caches will take a long time because it actually replays the contents
> of the caches as individual memory requests.  The reason we do this is so
> that we can use the same warmup files for different cache sizes and
> configurations (it approximates well).  After each load is completed, we
> clear the Ruby stats and continue the simulation.
> 
> I'm not positive how big our standard cache warmup files are, but I've
> seen it take anywhere between 10-45 minutes to load the caches.
> 
> --Mike
> 
> 
> On Thu, 23 Jun 2005, Christian Bienia wrote:
> 
> > Hi,
> >
> > thanks a lot. I could fix the issue with the Simics checkpoint, but I
> > still have problems resuming a simulation from a given state: Loading
> > the ruby cache contents with load-caches fails. The Simics console seems
> > to hang without any error messages, and the load-caches command has to
> > be interrupted with Ctrl-C. The ruby cache contents file seems to be
> > valid, I can manually decompress it with gunzip and it looks ok.
> >
> > Chris
> >
> >
> > On Thu, 2005-06-23 at 16:19, Alaa Alameldeen wrote:
> > > Chris,
> > >
> > > If you created the checkpoint with the ruby module loaded, you need to
> edit the
> > > checkpoint file manually to remove the ruby object from it. I think it
> is
> > > mentioned in a couple of places. The reason why loading the checkpoint
> fails is
> > > that Simics doesn't recognize the object ruby when it first starts.
> > >
> > > -Alaa
> > >
> > > Christian Bienia wrote:
> > > > Hi,
> > > >
> > > > I created a checkpoint of a benchmark with only ruby loaded (no opal).
> > > > However, when I quit Simics and try to read the configuration again, I
> > > > get the following error:
> > > >
> > > >
> > > >
> > > > simics> read-configuration
> > > > ../../checkpoints-u3/188.ammp/188.ammp-32-1b.ckp
> > > > cannot open file: ./modules/ruby-v9.so
> > > > Unexpected error when loading module 'ruby'
> > > >
> > > > cannot open file: ./modules/ruby-v9.so
> > > > Unexpected error when loading module 'ruby'
> > > >
> > > > Class ruby not found.
> > > > Error reading configuration file
> > > > Failed reading configuration
> > > > simics>
> > > >
> > > >
> > > >
> > > > list-modules shows that ruby is there, and list-failed-modules doesn't
> > > > show any errors. The confusing thing is that I can load checkpoints
> > > > which I have created without ruby being loaded, and after that I can
> > > > load and use ruby normally.
> > > >
> > > > To be a little bit more specific, I did exactly what Alaa explained in
> > > > his post on Feb 15 about "fast forwarding module in Ruby/Opal":
> > > >
> > > >
> > > >
> > > > To get a cache warmup file:
> > > > <...start from a checkpoint, do all required initialization...>
> > > > load-module ruby
> > > > ruby0.init
> > > > <....run simics for the amount of time you want...>
> > > > write-configuration <checkpoint_file_name>
> > > > ruby0.save-caches <cache_file_name>
> > > > quit
> > > > Now to use that warmup file:
> > > > read-configuration <checkpoint_file_name>
> > > > <...do all required initialization...>
> > > > load-module opal
> > > > load-module ruby
> > > > ruby0.init
> > > > opal0.init
> > > > ruby0.load-caches <cache_file_name>
> > > > <...run your simulation...>
> > > > <...print Ruby and/or Opal statistics...>
> > > > quit
> > > >
> > > >
> > > >
> > > > The error happens after "read-configuration <checkpoint_file_name>".
> Does anybody know how I can fix that?
> > > >
> > > > Chris
> > > >
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