Hi Atieh, This is a tricky question to answer, because it depends on a lot of other configuration parameters. If you are using the ALPHA or x86 architectures, I know that checkpointing works for both SE and FS. The other architectures might also work, but I'd have to defer to others on the list about what parts of the checkpointing functionality works for each ISA. If you're using the "classic" memory model in gem5 (the default), it's worth noting that cache state is not checkpointed, so when you restore, the caches are cold. On the other hand, the Ruby memory model has functionality to checkpoint the caches. Hope this helps, Joel
On Thu, Jun 2, 2011 at 12:55 AM, Atieh Lotfi <ati.lo...@gmail.com> wrote: > Hi Joel, > > Thank you so much for your help. > It would be kind of you if you would let me know, is it possible to restore > from checkpoints in SE mode?or it just works in FS mode? > > Regards, > Atieh > > On Wed, Jun 1, 2011 at 8:41 PM, Joel Hestness <hestn...@cs.utexas.edu>wrote: > >> Hi Atieh, >> You can take checkpoints within the benchmark by instrumenting the code >> with the M5 magic instructions. You will need to grab a few files from >> ./util/m5/ and move them to the source tree of your benchmark: m5op.h, >> m5ops.h and m5op_<arch>.S (where <arch> is the ISA that you're building the >> benchmark for). You will need to include the m5op.h header in the source >> code that you're instrumenting, and you will need to build and link against >> the m5op_<arch>.S assembly file. >> As an example of how the instrumentation works, you can check out the m5 >> control application, ./util/m5/m5.c, and the appropriate Makefiles in >> ./util/m5. >> Hope this helps, >> Joel >> >> >> On Tue, May 31, 2011 at 5:30 AM, Atieh Lotfi <ati.lo...@gmail.com> wrote: >> >>> Hi, >>> >>> I have some questions about checkpoitning mechanism in gem5. Is it >>> possible to control the checkpoint from the benchmark itself and not to >>> control it from the command line? I don’t want to take periodic checkpoints. >>> I want to determine some points in the benchmark for taking checkpoints. >>> >>> I also have another question. I want to know over and above serialize.c, >>> which c codes are related to getting checkpoints? >>> >>> Thanks in advance, >>> >>> Regards, >>> Atieh >>> _______________________________________________ >>> gem5-users mailing list >>> gem5-users@m5sim.org >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>> >> >> >> >> -- >> Joel Hestness >> PhD Student, Computer Architecture >> Dept. of Computer Science, University of Texas - Austin >> http://www.cs.utexas.edu/~hestness >> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@m5sim.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > _______________________________________________ > gem5-users mailing list > gem5-users@m5sim.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > -- Joel Hestness PhD Student, Computer Architecture Dept. of Computer Science, University of Texas - Austin http://www.cs.utexas.edu/~hestness
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