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Ok, it now seems that we do not require this version and updates
to the utility script.  Since it is optional that the block size 
be unserialized, the earlier checkpoints will not break.  For 
those checkpoints, the current block size would be assumed to be 
the block size with which the checkpoint was created.  If you 
agree, then I suggest that you eliminate the not required code. 

- Nilay Vaish


On April 3, 2014, 11:44 p.m., Marco Elver wrote:
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> This is an automatically generated e-mail. To reply, visit:
> http://reviews.gem5.org/r/2220/
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> 
> (Updated April 3, 2014, 11:44 p.m.)
> 
> 
> Review request for Default.
> 
> 
> Repository: gem5
> 
> 
> Description
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> 
> ruby: recorder: Fix (de-)serializing with different cache block-sizes
> 
> Upon aggregating records, serialize system's cache-block size, as the
> cache-block size can be different when restoring from a checkpoint. This way,
> we can correctly read all records when restoring from a checkpoints, even if
> the cache-block size is different.
> 
> Note, that it is only possible to restore from a checkpoint if the
> desired cache-block size is smaller or equal to the cache-block size
> when the checkpoint was taken; we can split one larger request into
> multiple small ones, but it is not reliable to do the opposite.
> 
> 
> Diffs
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> 
>   src/mem/ruby/recorder/CacheRecorder.cc 52c552138ba1 
>   src/mem/ruby/recorder/CacheRecorder.hh 52c552138ba1 
>   src/mem/ruby/system/System.cc 52c552138ba1 
>   src/sim/serialize.hh 52c552138ba1 
>   util/cpt_upgrader.py 52c552138ba1 
> 
> Diff: http://reviews.gem5.org/r/2220/diff/
> 
> 
> Testing
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> 
> Created a Ruby checkpoint with the default config. Restore from checkpoint 
> with default config (64 byte block-size) and varying block-sizes (32, 16, 8).
> 
> 
> Thanks,
> 
> Marco Elver
> 
>

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