This should be helpful to you -
https://lists.cs.wisc.edu/archive/gems-users/2006-March/msg00138.shtml 
 
However the above is ruby specific. I am not very familiar with Opal,
but I think the above should work.  
 
Cheers,  
Niket 
 
Niran Soundararajan wrote:
  Hello,
Is there a way to warmup (save cache states) before loading opal and using 
the warmed up cache states?
Thank you,
Niranjan
On Thu, 16 Apr 2009, Abdullah Kayi wrote:
   
  
    You have to setup ruby again from scratch.
Regards,
Abdullah
On Thu, Apr 16, 2009 at 5:37 PM, Niran Soundararajan
<soundara@xxxxxxxxxxx>wrote:
    
    
      Hello,
That removes the error. But once I load the checkpoint, I am not able
to access ruby parameters to save cache state etc.
Thank you,
Niranjan
On Thu, 16 Apr 2009, Niket Agarwal wrote:
      
      
        Yes, that is causing the error.
Cheers,
Niket
On Apr 16, 2009, at 5:24 PM, Niran Soundararajan wrote:
        
        
          Hello,
I did not remove this part.
OBJECT ruby0 TYPE ruby {
}
Thank you,
Niranjan
On Thu, 16 Apr 2009, Niket Agarwal wrote:
          
          
            I think there is another place where "ruby" is present in the
checkpoint file except "timing_model:ruby"
Did you remove that too?
Cheers,
Niket
On Apr 16, 2009, at 5:14 PM, Niran Soundararajan wrote:
            
            
              Hello,
I get the following error when I try to load a checkpoint that has
been created after loading and initializing ruby but before I do
anything with opal.
I tried removing the "timing_model: ruby" as well but the error
remained.
Error:
Physical Memory object cannot be found. If you are NOT compiling
Ruby and
you see this message, something is wrong.
Has anyone seen this before?
Thank you,
Niranjan
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