How do you take a checkpoint without the shell? Madhav
On Mon, Feb 6, 2012 at 10:49 AM, Nilay Vaish <[email protected]> wrote: > Then it might be that the processor is in an idle loop, and is not doing > anything. You can try taking checkpoint at some other points, may be very > early in the boot process and check if pc value changes. > > -- > Nilay > > > On Mon, 6 Feb 2012, Madhav Suresh wrote: > > Oh sorry, yes exactly, I'm able to connect to the terminal and issue >> commands. >> >> Madhav >> >> >> >> On Mon, Feb 6, 2012 at 10:04 AM, Nilay Vaish <[email protected]> wrote: >> >> You did not answer my question. What does 'run correctly' mean? >>> >>> >>> On Mon, 6 Feb 2012, Madhav Suresh wrote: >>> >>> Yea exactly, I'm able to load the checkpoint and have it run correctly >>> >>>> with >>>> bogus PC and NPC values. I was under the impression that this was the >>>> actual value that's loaded after the checkpoint? After a checkpoint is >>>> loaded, what is the codepath? I know that m5.simulate() is called in >>>> Simulation.py, but I'm unsure as to what happens after that. >>>> >>>> Apart from M5, the RIP that is saved is 0x400880. Where exactly is this >>>> RIP >>>> in the context of an x86 system? >>>> >>>> Thanks, >>>> Madhav >>>> >>>> >>>> >>>> On Mon, Feb 6, 2012 at 8:32 AM, Nilay Vaish <[email protected]> wrote: >>>> >>>> What do you mean by checkpoint resumes properly? Are you able to >>>> connect >>>> >>>>> to the terminal and issue some commands? IIRC, there are two places in >>>>> the >>>>> checkpoint where the PC and NPC are stored. >>>>> >>>>> -- >>>>> Nilay >>>>> >>>>> >>>>> On Sat, 4 Feb 2012, Madhav Suresh wrote: >>>>> >>>>> I'm using the AtomicSimpleCPU. Right for the _pc and _npc fields in >>>>> the >>>>> >>>>> checkpoint file I put zero, but the checkpoint still resumes properly. >>>>>> Here >>>>>> are the first couple fetches: >>>>>> >>>>>> 1611728894411000: system.cpu: Fetch: PC:0x400880 >>>>>> 1611728894412500: system.cpu: Fetch: PC:0x40056f >>>>>> >>>>>> This happens every time I restore any checkpoint from this specific >>>>>> kernel >>>>>> image. >>>>>> >>>>>> >>>>>> >>>>>> Nilay Vaish >>>>>> >>>>>> Fri, 03 Feb 2012 10:28:00 -0800 >>>>>> >>>>>> >>>>>> On Fri, 3 Feb 2012, Madhav Suresh wrote: >>>>>> >>>>>> >>>>>> Hey Guys, >>>>>> >>>>>> >>>>>> I'm a little confused as to how exactly the checkpoint load works. >>>>>> I've >>>>>> >>>>>> >>>>>> noticed that on a restore the PC is always at 0x400880. No matter what >>>>>> the >>>>>> >>>>>> >>>>>> _pc is, M5 will always resume to that address, and then eventually get >>>>>> back >>>>>> >>>>>> >>>>>> into normal execution. What is the exact code path the the simulator >>>>>> >>>>>> >>>>>> follows when the "-r" flag is set? >>>>>> >>>>>> >>>>>> That sounds really strange. What CPU model are you using? >>>>>> >>>>>> -- >>>>>> >>>>>> Nilay >>>>>> >>>>>> ______________________________******_________________ >>>>>> >>>>>> gem5-users mailing list >>>>> [email protected] >>>>> http://m5sim.org/cgi-bin/******mailman/listinfo/gem5-users<http://m5sim.org/cgi-bin/****mailman/listinfo/gem5-users> >>>>> <ht**tp://m5sim.org/cgi-bin/****mailman/listinfo/gem5-users<http://m5sim.org/cgi-bin/**mailman/listinfo/gem5-users> >>>>> > >>>>> <ht**tp://m5sim.org/cgi-bin/****mailman/listinfo/gem5-users<http://m5sim.org/cgi-bin/**mailman/listinfo/gem5-users> >>>>> <ht**tp://m5sim.org/cgi-bin/**mailman/listinfo/gem5-users<http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users> >>>>> > >>>>> >>>>>> >>>>>> >>>>> >>>>> ______________________________****_________________ >>>> >>> gem5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/****mailman/listinfo/gem5-users<http://m5sim.org/cgi-bin/**mailman/listinfo/gem5-users> >>> <ht**tp://m5sim.org/cgi-bin/**mailman/listinfo/gem5-users<http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users> >>> > >>> >>> >> ______________________________**_________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/**mailman/listinfo/gem5-users<http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users> >
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