Hi Steve,
Here is a run with unmodified m5-stable using se.py
spha...@lowpower:~/research/m5/m5-stable$ ./build/ALPHA_SE/m5.opt
configs/example/se.py -d --caches --l2cache --fast-forward=1
M5 Simulator System
Copyright (c) 2001-2008
The Regents of The University of Michigan
All Rights Reserved
M5 compiled Nov 8 2009 21:09:22
M5 revision 15e5581286b6+ 6285+ default tip
M5 started Nov 10 2009 18:44:15
M5 executing on lowpower
command line: ./build/ALPHA_SE/m5.opt configs/example/se.py -d --caches
--l2cache --fast-forward=1
Global frequency set at 1000000000000 ticks per second
0: system.remote_gdb.listener: listening for remote gdb #0 on port 7000
Switch at instruction count:1
info: Entering event queue @ 0. Starting simulation...
hack: be nice to actually delete the event here
Switched CPUS @ cycle = 1000
Changing memory mode to timing
switching cpus
m5.opt: build/ALPHA_SE/cpu/o3/thread_context_impl.hh:57: void
O3ThreadContext< <template-parameter-1-1>
>::takeOverFrom(ThreadContext*) [with Impl = O3CPUImpl]: Assertion
`getSystemPtr() == old_context->getSystemPtr()' failed.
Program aborted at cycle 1000
Aborted
I get the same error. I also tried giving the "-s" for standard switch
and changing the value of FF. Any idea why this is happening?
Thanks,
Sujay
On Tue, 2009-11-10 at 15:30 -0800, Steve Reinhardt wrote:
> I don't know any details about what works and what doesn't off the top
> of my head, but I can tell you that if something "works" in m5.fast
> but hits an assertion error in m5.opt, that's only because assertions
> are compiled out in m5.fast. So either the assertion is asserting
> something that doesn't necessarily need to be true (which happens) or
> the assertion is valid and m5.fast is merrily proceeding to do
> something bogus that just happens not to crash the simulation.
>
> That particular assertion looks like it should hold; what it is saying
> is that you're substituting a detailed CPU in system A for a simple
> CPU in system B, which would possibly cause problems if the CPU ever
> did something based on the system it's a member of. That could be a
> configuration error.
>
> Steve
>
> On Tue, Nov 10, 2009 at 12:00 PM, Sujay Phadke <[email protected]> wrote:
> > Does any one know about this? Is FF working with the latest m5.opt in SE
> > mode, and is it possible to FF with multiple CPUS?
> >
> > Thanks,
> > Sujay
> >
> > ----- Original Message -----
> > From: "Sujay Phadke" <[email protected]>
> > To: <[email protected]>
> > Sent: Saturday, November 07, 2009 5:41 PM
> > Subject: [m5-users] fast-forwarding and switching cpus
> >
> >
> >> Hello,
> >> I was going through the previous threads about fastforwarding
> >> support, but couldnt get a clear answer. When we specify
> >> --fast-forward=FF, is if FF ticks or FF instructions? If it is ticks,
> >> then is there a new way for FF instructions?
> >>
> >> As an aside, I am able to use --fast-forward with m5.fast. With m5.opt,
> >> it crashes with the error:
> >>
> >> M5 compiled Nov 6 2009 17:34:43
> >> M5 revision 15e5581286b6 6285 default tip
> >> M5 started Nov 7 2009 17:40:10
> >> M5 executing on lowpower
> >> command line: ./build/ALPHA_SE/m5.opt -d ../output/test/
> >> configs/spec2k6/runspec2k6.py -b bzip2 -d --caches --l2cache
> >> --fast-forward=5000000 --max-inst=100000
> >> Global frequency set at 1000000000000 ticks per second
> >> 0: system.remote_gdb.listener: listening for remote gdb #0 on port 7000
> >> Switch at instruction count:5000000
> >> info: Entering event queue @ 0. Starting simulation...
> >> info: Increasing stack size by one page.
> >> hack: be nice to actually delete the event here
> >> Switched CPUS @ cycle = 5079299000
> >> switching cpus
> >> m5.opt: build/ALPHA_SE/cpu/o3/thread_context_impl.hh:57: void
> >> O3ThreadContext< <template-parameter-1-1>
> >>>::takeOverFrom(ThreadContext*) [with Impl = O3CPUImpl]: Assertion
> >> `getSystemPtr() == old_context->getSystemPtr()' failed.
> >> Program aborted at cycle 5079299000
> >> Aborted
> >>
> >> Is there still the same bug about no valid threadcontext in o3?
> >>
> >> - Sujay
> >>
> >>
> >> _______________________________________________
> >> m5-users mailing list
> >> [email protected]
> >> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
> >>
> >
> > _______________________________________________
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> > [email protected]
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> >
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