Thanks Ali,
On a related issue, I tried checkpointing and restoring with atomic CPU both
times and get a memory range difference error on restore. Is this a
checkpointing bug? Output below. Thanks
Dave
Create checkpoint:
./build/ARM/gem5.opt configs/example/fs.py -n 1
--kernel=vmlinux.arm.smp.fb.2.6.38.8 --cpu-type=atomic --clock=2.5GHz
--script=dave.rcS
Load checkpoint:
./build/ARM/gem5.opt configs/example/fs.py -n 1
--kernel=vmlinux.arm.smp.fb.2.6.38.8 --cpu-type=atomic --clock=2.5GHz
--script=dave.rcS -r 1
fatal: Memory range size has changed! Saw 67108864, expected 268435456
@ cycle 1973295712800
[unserializeStore:build/ARM/mem/physical.cc, line 406]
Memory Usage: 315256 KBytes
On Oct 18, 2012, at 11:40 AM, Ali Saidi wrote:
> Hi Dave,
>
> It looks like the second system doesn't have a tlb (this=0x0) in the #0
> frame.
>
>
> Thanks,
>
> Ali
>
> On 18.10.2012 11:14, David Roberts wrote:
>
>> Hello,
>>
>> I'm using the latest development repository and ran into a problem when
>> restoring checkpoints. I create the checkpoint in atomic mode, then restore
>> it with detailed mode, which instantly segfaults. Any advice would be
>> appreciated;
>>
>> 1) creating checkpoint
>>
>> ./build/ARM/gem5.opt configs/example/fs.py -n 1
>> --kernel=vmlinux-3.3-arm-vexpress-emm-pcie --machine-type=VExpress_EMM
>> --cpu-type=atomic --clock=2.5GHz --script=test.rcS
>>
>> 2) restoring from checkpoint in detailed mode
>>
>> ./build/ARM/gem5.debug configs/example/fs.py -n 1
>> --kernel=vmlinux-3.3-arm-vexpress-emm-pcie --machine-type=VExpress_EMM
>> --restore-with-cpu=detailed --caches --clock=2.5GHz --script=test.rcS -r 1
>>
>> Error message when run in gdb;
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x000000000046c9e2 in ArmISA::TLB::invalidateMiscReg (this=0x0) at
>> build/ARM/arch/arm/tlb.hh:258
>> 258 inline void invalidateMiscReg() { miscRegValid = false; }
>> (gdb) bt
>> #0 0x000000000046c9e2 in ArmISA::TLB::invalidateMiscReg (this=0x0) at
>> build/ARM/arch/arm/tlb.hh:258
>> #1 0x00000000004c573e in ArmISA::copyRegs (src=0x3b8fe20, dest=0x3ec5eb0)
>> at build/ARM/arch/arm/utility.cc:159
>> #2 0x000000000144b701 in SimpleThread::copyArchRegs (this=0x2adbd20,
>> src_tc=0x3b8fe20) at build/ARM/cpu/simple_thread.cc:265
>> #3 0x000000000144ab2f in SimpleThread::copyState (this=0x2adbd20,
>> oldContext=0x3b8fe20) at build/ARM/cpu/simple_thread.cc:165
>> #4 0x000000000144aa7b in SimpleThread::copyTC (this=0x2adbd20,
>> context=0x3b8fe20) at build/ARM/cpu/simple_thread.cc:146
>> #5 0x000000000149ad94 in FullO3CPU<O3CPUImpl>::unserialize (this=0x3b33110,
>> cp=0x49f8750, section=...) at build/ARM/cpu/o3/cpu.cc:1115
>> #6 0x0000000001ac2665 in SimObject::loadState (this=0x3b33110,
>> cp=0x49f8750) at build/ARM/sim/sim_object.cc:83
>> #7 0x0000000001ea591f in _wrap_SimObject_loadState (args=0x2e21ef0) at
>> build/ARM/python/m5/internal/param_SimObject_wrap.cc:3039
>> #8 0x00002aaaaab4b1e8 in PyObject_Call (func=0x2aaaaaee3908, arg=0x2e21ef0,
>> kw=0x0) at Objects/abstract.c:2487
>> #9 0x00002aaaaabe25dc in ext_do_call (f=0x480d320, throwflag=<value
>> optimized out>) at Python/ceval.c:3978
>> #10 PyEval_EvalFrameEx (f=0x480d320, throwflag=<value optimized out>) at
>> Python/ceval.c:2410
>> #11 0x00002aaaaabe673f in PyEval_EvalCodeEx (co=0x2aaaaaffe558,
>> globals=<value optimized out>, locals=<value optimized out>, args=0x32dbfa8,
>> argcount=2, kws=0x32dbfb8, kwcount=0, defs=0x0, defcount=0, closure=0x0) at
>> Python/ceval.c:2942
>> #12 0x00002aaaaabe4517 in call_function (f=0x32dbde0, throwflag=<value
>> optimized out>) at Python/ceval.c:3775
>> #13 PyEval_EvalFrameEx (f=0x32dbde0, throwflag=<value optimized out>) at
>> Python/ceval.c:2370
>> #14 0x00002aaaaabe673f in PyEval_EvalCodeEx (co=0x2cedd50, globals=<value
>> optimized out>, locals=<value optimized out>, args=0x3809940, argcount=1,
>> kws=0x3809948, kwcount=0, defs=0x32d07e8, defcount=1, closure=0x0)
>> at Python/ceval.c:2942
>> #15 0x00002aaaaabe4517 in call_function (f=0x38096c0, throwflag=<value
>> optimized out>) at Python/ceval.c:3775
>> #16 PyEval_EvalFrameEx (f=0x38096c0, throwflag=<value optimized out>) at
>> Python/ceval.c:2370
>> #17 0x00002aaaaabe4e26 in call_function (f=0x37bacb0, throwflag=<value
>> optimized out>) at Python/ceval.c:3765
>> #18 PyEval_EvalFrameEx (f=0x37bacb0, throwflag=<value optimized out>) at
>> Python/ceval.c:2370
>> #19 0x00002aaaaabe673f in PyEval_EvalCodeEx (co=0x2d8d378, globals=<value
>> optimized out>, locals=<value optimized out>, args=0x0, argcount=0, kws=0x0,
>> kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:2942
>> #20 0x00002aaaaabe6782 in PyEval_EvalCode (co=0x0, globals=0x7fffffffa459,
>> locals=0x144da20) at Python/ceval.c:515
>> #21 0x00002aaaaabe5576 in exec_statement (f=0x361d850, throwflag=<value
>> optimized out>) at Python/ceval.c:4360
>> #22 PyEval_EvalFrameEx (f=0x361d850, throwflag=<value optimized out>) at
>> Python/ceval.c:1706
>> #23 0x00002aaaaabe673f in PyEval_EvalCodeEx (co=0x2d2c8a0, globals=<value
>> optimized out>, locals=<value optimized out>, args=0x0, argcount=0,
>> kws=0x2db43c0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at
>> Python/ceval.c:2942
>> #24 0x00002aaaaabe4517 in call_function (f=0x2db4240, throwflag=<value
>> optimized out>) at Python/ceval.c:3775
>> #25 PyEval_EvalFrameEx (f=0x2db4240, throwflag=<value optimized out>) at
>> Python/ceval.c:2370
>> #26 0x00002aaaaabe673f in PyEval_EvalCodeEx (co=0x2d8d3f0, globals=<value
>> optimized out>, locals=<value optimized out>, args=0x0, argcount=0, kws=0x0,
>> kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:2942
>> #27 0x00002aaaaabe6782 in PyEval_EvalCode (co=0x0, globals=0x7fffffffa459,
>> locals=0x144da20) at Python/ceval.c:515
>> #28 0x00002aaaaac076c9 in run_mod (str=0x20eac33 "m5.main()", start=<value
>> optimized out>, globals=0x2b647b0, locals=0x2b647b0, flags=0x0) at
>> Python/pythonrun.c:1330
>> #29 PyRun_StringFlags (str=0x20eac33 "m5.main()", start=<value optimized
>> out>, globals=0x2b647b0, locals=0x2b647b0, flags=0x0) at
>> Python/pythonrun.c:1293
>> #30 0x0000000001a82de8 in m5Main (argc=12, argv=0x7fffffffbcd8) at
>> build/ARM/sim/init.cc:256
>> #31 0x000000000040a81b in main (argc=12, argv=0x7fffffffbcd8) at
>> build/ARM/sim/main.cc:57
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