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cpt: update some comments in the checkpoint migration script

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This commit is contained in:
Ali Saidi 2012-06-05 10:36:59 -04:00
parent c49e739352
commit c06970b673
2 changed files with 21 additions and 2 deletions
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4
src/sim/serialize.hh
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@ -52,10 +52,10 @@ class SimObject;
/** The current version of the checkpoint format.
* This should be incremented by 1 and only 1 for every new version, where a new
* version is defined as a checkpoint created before this version wont work on
* version is defined as a checkpoint created before this version won't work on
* the current version until the checkpoint format is updated. Adding a new
* SimObject shouldn't cause the version number to increase, only changes to
* existing objects such as serializing/unserializing more stote, changing sizes
* existing objects such as serializing/unserializing more state, changing sizes
* of serialized arrays, etc. */
static const uint64_t gem5CheckpointVersion = 0x0000000000000001;

19
util/cpt_upgrader.py
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@ -38,6 +38,25 @@
# Authors: Ali Saidi
#
# This python code is used to migrate checkpoints that were created in one
# version of the simulator to newer version. As features are added or bugs are
# fixed some of the state that needs to be checkpointed can change. If you have
# many historic checkpoints that you use, manually editing them to fix them is
# both time consuming and error-prone.
# This script provides a way to migrate checkpoints to the newer repository in
# a programatic way. It can be imported into another script or used on the
# command line. From the command line the script will either migrate every
# checkpoint it finds recursively (-r option) or a single checkpoint. When a
# change is made to the gem5 repository that breaks previous checkpoints a
# from_N() method should be implemented here and the gem5CheckpointVersion
# variable in src/sim/serialize.hh should be incremented. For each version
# between the checkpoints current version and the new version the from_N()
# method will be run, passing in a ConfigParser object which contains the open
# file. As these operations can be isa specific the method can verify the isa
# and use regexes to find the correct sections that need to be updated.
import ConfigParser
import sys, os
import os.path as osp