If you only care about one of the running processes, and you're
*absoultely sure* the threads aren't interacting in any way, then you
can change Simics's cpu-switch-time to something high, like 10000. That
should greatly improve simulator performance.
James Wang wrote:
Hi,
I was wondering if anyone has any ideas how to make an efficient and
accurate simulation of different numbers of threads on Ruby...
What I mean is, I would like to have the results of 1 thread running
on 1 processor be similar to the results that I would obtain from
having 1 thread running on a 32 processors machine, but only using one
of the 32 (binding it).
The obvious solution would be to always use a 32 processor machine,
regardless of the number of threads. But that, as you might know, will
result in a significantly slower simulation. Running 1 thread on 1
processor, 2 threads and 2 processor, without taking the scalability
of our programs into consideration skews the results in favour of the
machines with a lower number of processors due to (as I understand)
the way the interconnection network is simulated.
Is there an easy way of somehow adjusting the 1 processor image to
perform the same as it would assuming it had 32? Or a way to always
use 32 processors while somehow speeding up the simulation to ignore
the ones that aren't being used?
Thanks in advance for any reply. :)
Regards
James
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