Ok, that seems to make sense, being also a simpler approach, but where
exactly it should be done? Objects are instantiated from python scripts,
so I imagine you are thinking about a parameter for one of those
scripts? Also, TLBs are instantiated from the CPU (itb and dtb), but I
want to collect the TLBs of each cpu on the System. CPUs are
instantiated in m5/simulate.py along other objects descending from Root,
but I'm not sure how to retrieve the TLBs from there. I'm not really
used to the Python/C++ mixture in the config, and grep search where the
objects are instantiated is a bit hard. So it is not really clear to me
how to proceed.
And if I finally manage to create that list, if it is a parameter on a
script as mentioned, how can I make it accesible from the tlb.cc class?
Thank you for your response,
Albert.
El 12/11/12 21:32, Nilay Vaish escribió:
On Mon, 12 Nov 2012, Albert wrote:
Hello there!
I am kind of a newbie with gem5 so this may be a silly question. I am
trying to implement a method capable of looking up into the TLBs of
the other CPUs in the system in order to resolve a TLB miss. In order
to do so, I should be able to communicate with other processors' TLBs
when an entry is not found in the local TLB.
The system would be a parallel application running on a FS on an ARM
multi-processor system. It seems the src/arch/arm/tlb.xx uses the
ThreadContext to retrieve the correct TLB for that thread. I
understand that various ThreadContext may be pointing to the same
process that is being executed in parallel in various processors. So
I guess I should find other ThreadContext in the simulation pointing
to the same process in order to obtain their TLBs?
I am still trying to find a suitable approach to do so (to
communicate with other TLBs). If someone can point out a proper
starting point it would be highly appreciated.
Why not just create a list of all the tlbs when the tlb objects are
instantiated?
--
Nilay
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