Hi,
Yes I`m adding a new module (but I schedule events by the number of
instructions using self.system.cpu[0].scheduleInstStop for exemple),
however this problem is occurring in the "clean" gem5 from the
repository (stable or not). The checkpoint never returns from the
drain call.
Best regards,
Felipe Rocha da Rosa
Best regards, Felipe Rocha da Rosa,PhD Student - PGMICRO - UFRGS,frdarosa.com
From: [email protected]
Date: Wed, 10 Feb 2016 13:44:57 -0500
To: [email protected]
Subject: Re: [gem5-users] Checkpoint in detailed cpu causing error
Hi,
I had problems that sound very similar to your case just a couple days ago. Did
you happen to have to write a module yourself? or did you have to call «
schedule » inside your module in order to tick your own clock?
Thanks,Timothy ChongBoston University
Le Feb 10, 2016 à 1:31 PM, Felipe Rocha da Rosa <[email protected]> a
écrit :Hi!
I'm trying to execute several slightly different executions of the same
application using the Detailed (DerivO3CPU) CPU mode and compare then. For the
purpose, my idea was executing the application and create a checkpoint at the
end. However, the checkpoint is never complete. I trace the cause to the drain
function in gem5-stable/src/python/m5/simulate.py, where the simulator is
called again and so remaining in the loop forever. My question is if I can
comment/change this line and do not perform the drain() without changing the
final results.
def drain(root): # Try to drain all objects. Draining might not be completed
unless # all objects return that they are drained on the first call. This
# is because as objects drain they may cause other objects to no # longer be
drained. def _drain(): all_drained = False dm =
internal.drain.createDrainManager() unready_objs = sum(obj.drain(dm) for
obj in root.descendants()) # If we've got some objects that can't drain
immediately, then simulate if unready_objs > 0:
dm.setCount(unready_objs) #WARNING: if a valid exit event occurs
while draining, it will not # get returned to the user script
exit_event = simulate() while exit_event.getCause() != 'Finished
drain': exit_event = simulate() else:
all_drained = True internal.drain.cleanupDrainManager(dm) return
all_drained
all_drained = _drain() while (not all_drained): all_drained =
_drain()
def checkpoint(dir): root = objects.Root.getInstance() if not
isinstance(root, objects.Root): raise TypeError, "Checkpoint must be
called on a root object." drain(root) memWriteback(root) print
"Writing checkpoint" internal.core.serializeAll(dir) resume(root)
Command:./build/ARM/gem5.opt ./configs/example/se.py -c queens -o 10
--cpu-type=detailed --caches --l1i_size=32kB --l1i_assoc=4 --l1d_size=32kB
--l1d_assoc=4 --l2_size=512kB --l2_assoc=8 --checkpoint-at-end
Thanks in advance!
Best regards, Felipe Rocha da
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