The main reason we don't have an example config file for this is that it
doesn't work out of the box. The code is there to assign different
ASIDs when you assign multiple workloads to different threads of an SMT
CPU, but since we've never used the multiprogrammed-workload-on-MP model
in SE mode we've just never put in the code to use different ASIDs on
different CPUs in an MP. I believe you were trying to put that in but
it wasn't working. My only point is that the bug you were observing
(where you thought you were fetching instructions from the wrong address
space) couldn't be caused by using the wrong ASID, since the ASIDs are
only used for the timing cache model and not functional memory accesses
(e.g., instruction fetches).
Steve
Philip Machanick wrote:
On 10/03/2006, at 11:48 PM, Steve Reinhardt wrote:
Actually the ASID is only used by the timing cache model, so it
couldn't cause this problem. In syscall emulation mode, each process
has its own independent virtually addressed functional memory, so the
real problem is likely that you have one process fetching instructions
out of a different process's functional memory object.
This being the case it would be nice it there was a working example of a
config file launching a different process on each CPU. The examples I
have found so far generally launch the same process on an MP config,
which then presumably forks or launches threads.
Philip Machanick School of ITEE, University of Queensland
Brisbane, Qld 4072, Australia http://www.itee.uq.edu.au/~philip/
phone +61(7) 3365 2766 fax +61(7) 3365 4999 mailto:[EMAIL PROTECTED]
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