Hi Muzamil,

It's possible to allocate more guest memory than you have hot memory. I
believe you need to change a System parameter, however (see
src/sim/System.py).

However, if your guest *uses* more memory than the host you will encounter
an error.

Jason

On Thu, Sep 14, 2017 at 9:24 AM Muzamil Rafique <[email protected]>
wrote:

> Hi All,
>
> I have a question regarding relationship (if any) that exists between host
> memory size and memory range assigned using option --mem-size=MEM_SIZE. If
> memory size of my host machine is 4GB(RAM), can I assign --mem-size=8GB in
> gem5 simulator se mode? If yes, what is the origin of these type of errors
> that encountered when assigning different SPEC2006 benchmarks as workloads.
>
> (i)
> warn: mremapping to new vaddr 0x7ffff79c8000-0x7ffff7a09000, adding 65536
> warn: returning 0x7ffff79c8000 as start
> fatal: FuncPageTable::allocate: addr 0x7ffff79e8000 already mapped
> Memory Usage: 8869576 KBytes
>
> (ii)
> panic: Tried to write unmapped address 0x7ffffa9ed740.
> Memory Usage: 8714168 KBytes
> Program aborted at tick 3243857330565
>
> Any feedback would be greatly appreciated :)
>
> Thanks
> Muzamil
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