Hi,
Try including the same caches configuration when you take checkpoint. Your
first step do not have caches.
On Thu, Sep 17, 2020 at 11:31 AM Xuhao Chen via gem5-users <
gem5-users@gem5.org> wrote:
> Hi all,
> I have a simple program:
> #include <vector>
> #include <stdio.h>
> #include <stdlib.h>
> #include "/home/cxh/gem5/include/gem5/m5ops.h"
>
> int main(int argc, char *argv[]) {
> int n = 1024 * 1024;
> if(argc == 2) n = atoi(argv[1]);
> printf("Vector Addition num = %d\n", n);
> std::vector<float> a(n, 1), b(n, 1), c(n, 0);
> printf("Begin of ROI\n");
> m5_checkpoint(0,0);
> m5_reset_stats(0,0);
> for(int i = 0; i < n; i ++)
> c[i] = a[i] + b[i];
> m5_dump_stats(0,0);
> printf("End of ROI\n");
> return 0;
> }
>
> Compiled like this:
> g++ -O3 test.cc -o test /home/cxh/gem5/util/m5/src/x86/m5op.S
> -I/home/cxh/gem5/include
>
> Run it once to get checkpoint:
>
> build/X86/gem5.fast configs/example/se.py --cmd=/home/cxh/bin/test
> --checkpoint-dir=/home/cxh/gem5/checkpoints/ --num-cpus=1 --mem-size=4GB
> ...
> Vector Addition num = 1048576
> Begin of ROI
> Writing checkpoint
> warn: Checkpoints for file descriptors currently do not work.
> info: Entering event queue @ 6304095500. Starting simulation...
> End of ROI
> Exiting @ tick 8539105000 because exiting with last active thread context
>
> All good. Now I run it again to get detailed simulation:
>
> build/X86/gem5.fast configs/example/se.py --cmd=/home/cxh/bin/test
> --checkpoint-dir=/home/cxh/gem5/checkpoints/ --num-cpus=1 --mem-size=4GB
> --cpu-type=DerivO3CPU --caches --l1d_size=512kB -r 1
> ...
> Switch at curTick count:10000
> info: Entering event queue @ 6304095500. Starting simulation...
> Switched CPUS @ tick 6304105500
> switching cpus
> warn: PowerState: Already in the requested power state, request ignored
> **** REAL SIMULATION ****
> info: Entering event queue @ 6304105500. Starting simulation...
> End of ROI
> *panic: Tried to execute unmapped address 0x7ffff7ce2380.*
> Memory Usage: 4356324 KBytes
> Program aborted at tick 13255676500
> --- BEGIN LIBC BACKTRACE ---
> build/X86/gem5.fast(_Z15print_backtracev+0x2c)[0x5624e1432c7c]
> build/X86/gem5.fast(_Z12abortHandleri+0x4a)[0x5624e144280a]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0x128a0)[0x7eff338008a0]
> /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7eff31de9f47]
> /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7eff31deb8b1]
> build/X86/gem5.fast(+0x5bb72f)[0x5624e0c8e72f]
>
> build/X86/gem5.fast(_ZN6X86ISA9PageFault6invokeEP13ThreadContextRK14RefCountingPtrI10StaticInstE+0x5b8)[0x5624e15801a8]
>
> build/X86/gem5.fast(_ZN13DefaultCommitI9O3CPUImplE10commitHeadERK14RefCountingPtrI13BaseO3DynInstIS0_EEj+0x5f5)[0x5624e0d3d045]
>
> build/X86/gem5.fast(_ZN13DefaultCommitI9O3CPUImplE11commitInstsEv+0x1d2)[0x5624e0d3d3f2]
>
> build/X86/gem5.fast(_ZN13DefaultCommitI9O3CPUImplE6commitEv+0x860)[0x5624e0d3e370]
>
> build/X86/gem5.fast(_ZN13DefaultCommitI9O3CPUImplE4tickEv+0x89)[0x5624e0d3e589]
> build/X86/gem5.fast(_ZN9FullO3CPUI9O3CPUImplE4tickEv+0x133)[0x5624e0d45453]
> build/X86/gem5.fast(_ZN10EventQueue10serviceOneEv+0xd9)[0x5624e1439259]
> build/X86/gem5.fast(_Z9doSimLoopP10EventQueue+0x87)[0x5624e1456e47]
> build/X86/gem5.fast(_Z8simulatem+0xc8a)[0x5624e1457e1a]
> build/X86/gem5.fast(+0xe1acc1)[0x5624e14edcc1]
> build/X86/gem5.fast(+0x7ccaea)[0x5624e0e9faea]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x64d7)[0x7eff33aadc47]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7d8)[0x7eff33bec908]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5bf6)[0x7eff33aad366]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7d8)[0x7eff33bec908]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5bf6)[0x7eff33aad366]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7d8)[0x7eff33bec908]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5bf6)[0x7eff33aad366]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7d8)[0x7eff33bec908]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7eff33aa75d9]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x6ac0)[0x7eff33aae230]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7d8)[0x7eff33bec908]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5bf6)[0x7eff33aad366]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7d8)[0x7eff33bec908]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7eff33aa75d9]
>
> /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyRun_StringFlags+0x76)[0x7eff33b576f6]
> --- END LIBC BACKTRACE ---
> Aborted (core dumped)
>
>
> Any idea why this error is happening?
>
> Thank you!
>
> Best,
> Xuhao
> _______________________________________________
>
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--
Best Regards,
Abhishek
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