Hi Xiaobin,
The short answer: Not out of the box.
The long answer:
You can definitely create the kind of system that you are describing in gem5,
with a "non-global" address map, but do not expect to easily run an OS on top
of it. The patch you describe lets you have multiple different memories, and
there is nothing forcing you to give all the CPUs the same memory map. However,
if you intend to actually run software, gem5 currently assumes you run a single
OS instance, and changing that would probably be quite a task.
The one "hack" I can think of would be to treat each core+$es as a machine, and
then instead of connecting them with ethernet, connect them with a non-coherent
bus. Perhaps something like this could do what you want it to do.
Andreas
From: Xiaobin Liu <[email protected]<mailto:[email protected]>>
Reply-To: gem5 users mailing list
<[email protected]<mailto:[email protected]>>
Date: Tuesday, 2 April 2013 15:34
To: "[email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]>>
Subject: [gem5-users] Each Core with private memory
Hi gem5 team,
My research is to design and simulate a multicore architecture under mesh
topology with each core having its own memory, which cannot be seen by other
processing units. Communication is done by interconnection of L1 caches of
different cores.
I find that the memory model is based on one single instance of physical memory
at bottom. Although distributed generalized memories are enabled in this way
http://reviews.gem5.org/r/1113/diff/?page=3, it seems that no one has done
private memory stuff.
Thus here comes the question, is it reasonable and feasible to adapt the source
code of the interface between NoC and memory to my target architecture?
I am a newbie in gem5 and hope it won't bother you. I would appreciate that if
anyone kindly gives me a hint.
Regards,
-Xiaobin
-- IMPORTANT NOTICE: The contents of this email and any attachments are
confidential and may also be privileged. If you are not the intended recipient,
please notify the sender immediately and do not disclose the contents to any
other person, use it for any purpose, or store or copy the information in any
medium. Thank you.
_______________________________________________
gem5-users mailing list
[email protected]
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
