Hi Hui, I think you're looking for the function m5checkpoint() in src/sim/pseudo_inst.cc.
Joel On Thu, Jul 25, 2013 at 8:32 PM, Hui Zhao <[email protected]> wrote: > Joel > Thanks very much for the information. I have another question related > to checkpointing. There is a m5 opcode checkpoint(delay,period). It is > implemented by m5_checkpoint. However, I didn't find the source code of > this function. Do you know where I can find it? Basically, I want to know > how this function can be called from inside the simulator. > > Thanks > Hui > > > On Thu, Jul 25, 2013 at 5:24 PM, Joel Hestness <[email protected]>wrote: > >> Hi Hui, >> Looking at the do_pin() function in ./util/m5/m5.c, it appears that it >> doesn't do an upcall into the simulator (i.e. it doesn't try to execute a >> gem5 pseudo-instruction). As such, the /sbin/m5 pin call must be annotated >> into the benchmark that you want to run, because there isn't a way to get >> the same functionality from within the simulator. >> >> Joel >> >> >> >> On Tue, Jul 23, 2013 at 3:31 PM, Hui Zhao <[email protected]> wrote: >> >>> What I want to do is to call "/sbin/m5 pin" command in the middle of >>> benchmark execution. For example, I have 4 cores running an application >>> first. Then I want to move all the application's threads to 2 cores only. I >>> can use m5 pin to do it, but right now only before benchmark get started. >>> As you said, I can modify the benchmark source code to do it. But if gem5 >>> can have a way to do it, it will be easier. The way I can think of is to >>> save a checkpoint of benchmark's execution first, call m5 pin, then resume >>> the benchmark. >>> >>> Thanks >>> Hui >>> >>> >>> On Tue, Jul 23, 2013 at 1:33 PM, Joel Hestness <[email protected]>wrote: >>> >>>> Hi Hui, >>>> Can you give specifics of what you're trying to achieve? Depending >>>> on what you'd like to do, it may make most sense to modify the benchmark >>>> that you're running to explicitly call the command. On the other hand, it >>>> may be simple to add the call you'd like to the simulator and parameterize >>>> it to be called if you pass a command line parameter. >>>> >>>> Thanks, >>>> Joel >>>> >>>> >>>> >>>> On Mon, Jul 22, 2013 at 10:42 PM, Hui Zhao <[email protected]> wrote: >>>> >>>>> Joel >>>>> Thanks for the reply. But I have a question about this script. >>>>> According to its comment: >>>>> >>>>> when run in M5, it creates >>>>> <http://grok.gem5.org/xref/gem5/configs/boot/hack_back_ckpt.rcS#5>a >>>>> checkpoint after Linux boot up, but >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> before any benchmarks have been run. >>>>> >>>>> However, I want to create a checkpoint after a benchmark is run >>>>> for some time, then call some "/sbin/m5 cmd" and continue the >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> same benchmark's execution. >>>>> Should this script work for my purpose or some change is needed? >>>>> >>>>> Thanks >>>>> >>>>> Hui >>>>> >>>>> >>>>> >>>>> On Mon, Jul 22, 2013 at 3:03 PM, Joel Hestness >>>>> <[email protected]>wrote: >>>>> >>>>>> Hi Hui, >>>>>> I'd recommend that you check out the hack_back_ckpt.rcS runscript >>>>>> included in gem5/configs/boot/, and for more detail on controlling the >>>>>> system after checkpoint restore, take a look at this email thread: >>>>>> http://www.mail-archive.com/[email protected]/msg07720.html >>>>>> >>>>>> Joel >>>>>> >>>>>> >>>>>> On Mon, Jul 22, 2013 at 1:21 AM, Hui Zhao <[email protected]> wrote: >>>>>> >>>>>>> Hello >>>>>>> Can we make some changes in the simulation settings after restore >>>>>>> from a checkpoint? >>>>>>> For example, I first save a checkpoint, when I restore from it, is >>>>>>> there a way that I can call "/sbin/m5 cmd" first before continue the >>>>>>> execution? Some posts talk about running commands like in .rcS files in >>>>>>> m5 >>>>>>> term after restoring the checkpoint, however, when I try it, the >>>>>>> execution >>>>>>> just continue from the checkpoint and there is no way to type in any >>>>>>> cmd in >>>>>>> m5 term. >>>>>>> >>>>>>> Thanks >>>>>>> Hui >>>>>>> >>>>>>> _______________________________________________ >>>>>>> gem5-users mailing list >>>>>>> [email protected] >>>>>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Joel Hestness >>>>>> PhD Student, Computer Architecture >>>>>> Dept. of Computer Science, University of Wisconsin - Madison >>>>>> http://pages.cs.wisc.edu/~hestness/ >>>>>> >>>>>> _______________________________________________ >>>>>> gem5-users mailing list >>>>>> [email protected] >>>>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> gem5-users mailing list >>>>> [email protected] >>>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>>> >>>> >>>> >>>> >>>> -- >>>> Joel Hestness >>>> PhD Student, Computer Architecture >>>> Dept. of Computer Science, University of Wisconsin - Madison >>>> http://pages.cs.wisc.edu/~hestness/ >>>> >>>> _______________________________________________ >>>> gem5-users mailing list >>>> [email protected] >>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>> >>> >>> >>> _______________________________________________ >>> gem5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>> >> >> >> >> -- >> Joel Hestness >> PhD Student, Computer Architecture >> Dept. of Computer Science, University of Wisconsin - Madison >> http://pages.cs.wisc.edu/~hestness/ >> >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > -- Joel Hestness PhD Student, Computer Architecture Dept. of Computer Science, University of Wisconsin - Madison http://pages.cs.wisc.edu/~hestness/
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