No, I'll commit it.
Ali
On Apr 9, 2008, at 6:29 PM, nathan binkert wrote:
Other than the FSConfig.py change, is there any reason this shouldn't
just be in the tree?
On Wed, Apr 9, 2008 at 1:53 PM, Ali Saidi <[EMAIL PROTECTED]> wrote:
Actually in our tutorial as ASPLOS 2008 we showed an example of
adding a
variance to delay memory. Here is a diff to m5 that should do the
trick.
Just set latency_var = 'XXns' on the Physical Memory object and
that should
do the trick. It will still be deterministic for a given latency
since the
random number generator is seeded to the same thing (which is good
so you
can redo an experiment when you find the problem). Changing the
latency_var
parameter by a little bit is probably the best way to see a wide
variety of
results.
Ali
On Apr 9, 2008, at 4:46 PM, Steve Reinhardt wrote:
Have you read the paper by Alameldeen and Wood on this? (There
may have
been other coauthors.) They introduced variability by making the
memory
latency pseudo-random.
Steve
2008/4/9 Geoffrey Blake <[EMAIL PROTECTED]>:
I'm potentially looking for some ways to induce some non-
determinism into
multiprocessor setups for M5, since currently M5 is completely
deterministic. Does anyone have any suggestions where I should
start looking
to be able to do this? I'd like to measure the variance for threaded
programs over many runs.
I'm thinking the best place to induce non-determinism is in
bus.cc, or to
even perhaps randomly shuffle the event queue for events that need
to launch
on the same tick.
Thanks,
Geoff
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