[ECOS] Simulation

[ECOS] Simulation

[Carlos Camargo]

Hi, 

I'm working with arm7tdmi, i new in ecos, i need
simulate the basic programs, but i have problems with
this. My questions are: 

Can I use linux Linux synthetic target for my
simulation? The performance of ecos on this target is
equal that in ARM, ie. Interrupts??

The compilation of toolchain for linux is required??

Thanks

Carlos Camargo

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Re: [ECOS] Simulation

[Jonathan Larmour]

Carlos Camargo wrote:
> 
> Hi,
> 
> I'm working with arm7tdmi, i new in ecos, i need
> simulate the basic programs, but i have problems with
> this. My questions are:
> 
> Can I use linux Linux synthetic target for my
> simulation? The performance of ecos on this target is
> equal that in ARM, ie. Interrupts??

It's a completely different architecture and target, being run in a system
where CPU resources depend on the loading of the rest of the system. Trying
to compare the performance may not be a useful thing to do if that is of
interest to you.

> The compilation of toolchain for linux is required??

Maybe. You could try it with the default tools on your linux system. They
will probably just work. Just set the CYGBLD_GLOBAL_COMMAND_PREFIX within
the synthetic target HAL to "" i.e. empty.

You may get a more realistic simulation with the MIPS tx39 simulator. While
this is slower from a user's point of view, the simulation is more accurate
from the program's point of view. Something to consider anyway - it depends
on why you are interested in the performance!

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

Re: [ECOS] Simulation

[Frank Ch. Eigler]

abhishek kashyap <abhi.kashyap@usa.net> writes:

:     I need to do some simulation with multiple threads running at multiple
: stations in parallel. Does eCos provide features to simulate multiple
: processors (each representing a station) and a physical channel, as it can be
: done in network simulator (ns) or such other tools, or is there some other way
: to it.

One way is to use computer system simulators that are capable of
either modelling multiple concurrent systems internally, or are able
to support external parallelism.  While our "sid" simulator (see
sources.redhat.com) is capable of both the former and the latter, the
difficulty comes in modelling the interconnected I/O mechanisms (as
opposed to the concurrent independent systems).  What is the physical
channel in question?

- FChE

[ECOS] Simulation

[abhishek kashyap]

Hi all,
    I need to do some simulation with multiple threads running at multiple
stations in parallel. Does eCos provide features to simulate multiple
processors (each representing a station) and a physical channel, as it can be
done in network simulator (ns) or such other tools, or is there some other way
to it.

Sincerely,
Abhishek Kashyap.

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