hi,
We are using 64-bit machine with 16GB memory and SPEC CPU 2000 benchmarks.
As we have already run other configurations of simulations with these
benchmarks, this may not be the problem.
We are able to simulate 16 copies of SPEC CPU2000 benchmarks for one
simulation with 2GB physical memory in the configuration file.
system = System(cpu = [CPUClass(cpu_id = i) for i in xrange(np)],
physmem = PhysicalMemory(range = AddrRange("2056MB")),
membus = ToMemBus(), mem_mode = test_mem_mode)
When we use 32 copies of these benchmarks for one simulation, we had the
problems. We tried physical memory with 10GB, 12 GB, 14 GB, and 16GB and
got "Out of memory" error. Then we tried physical memory with 32 GB and we
got "can not allocate memory" error.
could you please help me about this...........
On Fri, Nov 14, 2008 at 6:55 PM, <[EMAIL PROTECTED]> wrote:
> I just noticed your failure is happening before the simulation even starts,
> but
> my question is still relevant. Why is your configuration using up 16 GB of
> memory before the simulation even gets going? I would be extremely
> surprised if
> your binary was that big, and there shouldn't be much of anything else in
> memory
> when you're starting up. You'd probably do well to figure that out since
> you may
> never be able to give it enough memory otherwise.
>
> Gabe
>
> Quoting [EMAIL PROTECTED]:
>
> > Also, what sort of benchmark are you running? It's quite possible you
> have
> > some
> > sort of run away recursion or infinite loop with allocation in it and
> you're
> > filling and exceeding any available amount of simulated memory. I would
> > suggest
> > looking at what instructions are executing after a while
> (--trace-flags=Exec
> > --trace-start=<a little while before the failure>) to see if you're
> getting
> > stuck in a loop. This shouldn't happen if you're running m5 right out of
> the
> > box, but if you've written your own benchmark or modified something it
> could.
> >
> > Gabe
> >
> > Quoting nathan binkert <[EMAIL PROTECTED]>:
> >
> > > You don't have enough virtual memory on your machine to support that
> > > much simulated physical memory. There are two causes:
> > > 1) You're on a 32-bit OS and you just don't have the virtual address
> > > space available. There's nothing you can do here.
> > > 2) You don't have enough RAM + SWAP to cover the amount of physical
> > > memory you want to support. You can add a swap partition or file and
> > > that will solve your problem.
> > >
> > > On Fri, Nov 14, 2008 at 4:23 PM, Devraj Chapagain <
> [EMAIL PROTECTED]>
> > > wrote:
> > > > hi,
> > > >
> > > > I have encountered a problem while simulating a configuration(.py)
> file.
> > > >
> > > > The error is:
> > > > fatal: Out of memory, please increase size of physical memory.
> > > > @ cycle 0
> > > > [new_page:build/ALPHA_SE/sim/system.cc, line 230]
> > > > Memory Usage: 2295488 KBytes
> > > >
> > > > Then in order to remove this error, i changed the allocated physical
> > memory
> > > > size, i.e., initially was "2056 MB" then changed to "16GB" step by
> step
> > but
> > > > got still the same problem.
> > > >
> > > > When i increase the physical memory to 32 GB for checking, at this
> time
> > the
> > > > error is as:
> > > > mmap: Cannot allocate memory
> > > > fatal: Could not mmap!
> > > > @ cycle 0
> > > > [PhysicalMemory:build/ALPHA_SE/mem/physical.cc, line 66]
> > > > Memory Usage: 131804 KBytes
> > > >
> > > >
> > > > Could you please help me, i could not fix this problem.....
> > > >
> > > > Thank you,
> > > > devraj
> > > >
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