[gem5-users] SE Mode crashing with multithread workload

[Farhad Yusufali via gem5-users]

Hi all,

My gem5 version is fa70478413e4650d0058cbfe81fd5ce362101994. I'm trying to run 
a multithreaded workload in SE mode, but it's crashing. Here is my very simple 
workload:


#include <pthread.h>

#include <iostream>

using namespace std;


int sum[4];


void* thread(void* sum) {

  for (int i = 0; i < 1000; i++)

    *((int*)sum) += i;


  return 0;

}


int main() {

  sum[0] = sum[1] = sum[2] = sum[3] = 0;

  pthread_t threads[4];


  for (int tid = 0; tid < 4; tid++)

      pthread_create(&threads[tid], NULL, thread, &sum[tid]);


  for (int tid = 0; tid < 4; tid++)

      pthread_join(threads[tid], NULL);


  cout << sum [0] << " " << sum[1] << " " << sum[2] << " " << sum[3] << endl;

  return 0;

}



When I run it with:

build/X86/gem5.opt --debug-flags=PseudoInst configs/example/se.py --cmd=./multi 
--num-cpus=4 --ruby --cpu-type=DerivO3CPU

I get:
panic: panic condition !clobber occurred: EmulationPageTable::allocate: addr 
0x7ffff778d000 already mapped

I found an existing thread that discusses this but no update was posted: 
https://www.mail-archive.com/gem5-users@gem5.org/msg17926.html

Was this ever resolved?

Thanks,
Farhad

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