def begin_test(self, trigger=None):
"""Called to initiate a test.
Could be called on start-up or from a callback.
"""
if _debug:
self.log.debug("begin_test called with trigger: %s" %
(str(trigger)))
if _profiling:
ps = pstats.Stats(_profile).sort_stats('cumulative')
ps.dump_stats("test_profile.pstat")
ctx = profiling_context()
else:
ctx = nullcontext()
with ctx:
self._mode = Scheduler._MODE_NORMAL
if trigger is not None:
trigger.unprime()
# Issue previous test result, if there is one
if self._test_result is not None:
if _debug:
self.log.debug("Issue test result to regression object")
cocotb.regression_manager.handle_result(self._test_result)
self._test_result = None
if self._entrypoint is not None:
test = self._entrypoint
self._entrypoint = None
self.schedule(test)
self.advance()
def begin_test(self, trigger=None):
"""Called to initiate a test.
Could be called on start-up or from a callback.
"""
if _debug:
self.log.debug("begin_test called with trigger: %s" %
(str(trigger)))
if _profiling:
ps = pstats.Stats(_profile).sort_stats('cumulative')
ps.dump_stats("test_profile.pstat")
ctx = profiling_context()
else:
ctx = nullcontext()
with ctx:
self._mode = Scheduler._MODE_NORMAL
if trigger is not None:
trigger.unprime()
# Issue previous test result, if there is one
if self._test_result is not None:
if _debug:
self.log.debug("Issue test result to regression object")
cocotb.regression_manager.handle_result(self._test_result)
self._test_result = None
if self._entrypoint is not None:
test = self._entrypoint
self._entrypoint = None
self.schedule(test)
self._check_termination()
def _event_loop(self, trigger):
"""
Run an event loop triggered by the given trigger.
The loop will keep running until no further triggers fire.
This should be triggered by only:
* The beginning of a test, when there is no trigger to react to
* A GPI trigger
"""
if _profiling:
ctx = profiling_context()
else:
ctx = nullcontext()
with ctx:
# When a trigger fires it is unprimed internally
if _debug:
self.log.debug("Trigger fired: %s" % str(trigger))
# trigger.unprime()
if self._mode == Scheduler._MODE_TERM:
if _debug:
self.log.debug("Ignoring trigger %s since we're terminating" %
str(trigger))
return
if trigger is self._readonly:
self._mode = Scheduler._MODE_READONLY
# Only GPI triggers affect the simulator scheduling mode
elif isinstance(trigger, GPITrigger):
self._mode = Scheduler._MODE_NORMAL
# We're the only source of ReadWrite triggers which are only used for
# playing back any cached signal updates
if trigger is self._readwrite:
if _debug:
self.log.debug("Writing cached signal updates")
while self._writes:
handle, value = self._writes.popitem()
handle.setimmediatevalue(value)
self._readwrite.unprime()
return
# Similarly if we've scheduled our next_timestep on way to readwrite
if trigger is self._next_timestep:
if not self._writes:
self.log.error(
"Moved to next timestep without any pending writes!")
else:
self.log.debug(
"Priming ReadWrite trigger so we can playback writes")
self._readwrite.prime(self.react)
return
# work through triggers one by one
is_first = True
self._pending_triggers.append(trigger)
while self._pending_triggers:
trigger = self._pending_triggers.pop(0)
if not is_first and isinstance(trigger, GPITrigger):
self.log.warning(
"A GPI trigger occurred after entering react - this "
"should not happen."
)
assert False
# this only exists to enable the warning above
is_first = False
if trigger not in self._trigger2coros:
# GPI triggers should only be ever pending if there is an
# associated coroutine waiting on that trigger, otherwise it would
# have been unprimed already
if isinstance(trigger, GPITrigger):
self.log.critical(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
trigger.log.info("I'm the culprit")
# For Python triggers this isn't actually an error - we might do
# event.set() without knowing whether any coroutines are actually
# waiting on this event, for example
elif _debug:
self.log.debug(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
continue
# Scheduled coroutines may append to our waiting list so the first
# thing to do is pop all entries waiting on this trigger.
scheduling = self._trigger2coros.pop(trigger)
if _debug:
debugstr = "\n\t".join([coro.__name__ for coro in scheduling])
if len(scheduling):
debugstr = "\n\t" + debugstr
self.log.debug("%d pending coroutines for event %s%s" %
(len(scheduling), str(trigger), debugstr))
# This trigger isn't needed any more
trigger.unprime()
# If the coroutine was waiting on multiple triggers we may be able
# to unprime the other triggers that didn't fire
scheduling_set = set(scheduling)
other_triggers = {
t
for coro in scheduling
for t in self._coro2triggers[coro]
} - {trigger}
for pending in other_triggers:
# every coroutine waiting on this trigger is already being woken
if scheduling_set.issuperset(self._trigger2coros[pending]):
if pending.primed:
pending.unprime()
del self._trigger2coros[pending]
for coro in scheduling:
if _debug:
self.log.debug("Scheduling coroutine %s" % (coro.__name__))
self.schedule(coro, trigger=trigger)
if _debug:
self.log.debug("Scheduled coroutine %s" % (coro.__name__))
# Schedule may have queued up some events so we'll burn through those
while self._pending_events:
if _debug:
self.log.debug("Scheduling pending event %s" %
(str(self._pending_events[0])))
self._pending_events.pop(0).set()
# no more pending triggers
self.advance()
if _debug:
self.log.debug("All coroutines scheduled, handing control back"
" to simulator")
def _event_loop(self, trigger):
"""
Run an event loop triggered by the given trigger.
The loop will keep running until no further triggers fire.
This should be triggered by only:
* The beginning of a test, when there is no trigger to react to
* A GPI trigger
"""
if _profiling:
ctx = profiling_context()
else:
ctx = nullcontext()
with ctx:
# When a trigger fires it is unprimed internally
if _debug:
self.log.debug("Trigger fired: %s" % str(trigger))
# trigger.unprime()
if self._mode == Scheduler._MODE_TERM:
if _debug:
self.log.debug("Ignoring trigger %s since we're terminating" %
str(trigger))
return
if trigger is self._read_only:
self._mode = Scheduler._MODE_READONLY
# Only GPI triggers affect the simulator scheduling mode
elif isinstance(trigger, GPITrigger):
self._mode = Scheduler._MODE_NORMAL
# work through triggers one by one
is_first = True
self._pending_triggers.append(trigger)
while self._pending_triggers:
trigger = self._pending_triggers.pop(0)
if not is_first and isinstance(trigger, GPITrigger):
self.log.warning(
"A GPI trigger occurred after entering react - this "
"should not happen."
)
assert False
# this only exists to enable the warning above
is_first = False
# Scheduled coroutines may append to our waiting list so the first
# thing to do is pop all entries waiting on this trigger.
try:
scheduling = self._trigger2coros.pop(trigger)
except KeyError:
# GPI triggers should only be ever pending if there is an
# associated coroutine waiting on that trigger, otherwise it would
# have been unprimed already
if isinstance(trigger, GPITrigger):
self.log.critical(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
trigger.log.info("I'm the culprit")
# For Python triggers this isn't actually an error - we might do
# event.set() without knowing whether any coroutines are actually
# waiting on this event, for example
elif _debug:
self.log.debug(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
del trigger
continue
if _debug:
debugstr = "\n\t".join([coro.__name__ for coro in scheduling])
if len(scheduling):
debugstr = "\n\t" + debugstr
self.log.debug("%d pending coroutines for event %s%s" %
(len(scheduling), str(trigger), debugstr))
# This trigger isn't needed any more
trigger.unprime()
for coro in scheduling:
if _debug:
self.log.debug("Scheduling coroutine %s" % (coro.__name__))
self.schedule(coro, trigger=trigger)
if _debug:
self.log.debug("Scheduled coroutine %s" % (coro.__name__))
# Schedule may have queued up some events so we'll burn through those
while self._pending_events:
if _debug:
self.log.debug("Scheduling pending event %s" %
(str(self._pending_events[0])))
self._pending_events.pop(0).set()
# remove our reference to the objects at the end of each loop,
# to try and avoid them being destroyed at a weird time (as
# happened in gh-957)
del trigger
del coro
del scheduling
# no more pending triggers
self._check_termination()
if _debug:
self.log.debug("All coroutines scheduled, handing control back"
" to simulator")
def _event_loop(self, trigger):
"""
Run an event loop triggered by the given trigger.
The loop will keep running until no further triggers fire.
This should be triggered by only:
* The beginning of a test, when there is no trigger to react to
* A GPI trigger
"""
if _profiling:
ctx = profiling_context()
else:
ctx = nullcontext()
with ctx:
# When a trigger fires it is unprimed internally
if _debug:
self.log.debug("Trigger fired: %s" % str(trigger))
# trigger.unprime()
if self._mode == Scheduler._MODE_TERM:
if _debug:
self.log.debug("Ignoring trigger %s since we're terminating" %
str(trigger))
return
if trigger is self._readonly:
self._mode = Scheduler._MODE_READONLY
# Only GPI triggers affect the simulator scheduling mode
elif isinstance(trigger, GPITrigger):
self._mode = Scheduler._MODE_NORMAL
# We're the only source of ReadWrite triggers which are only used for
# playing back any cached signal updates
if trigger is self._readwrite:
if _debug:
self.log.debug("Writing cached signal updates")
while self._writes:
handle, value = self._writes.popitem()
handle.setimmediatevalue(value)
self._readwrite.unprime()
return
# Similarly if we've scheduled our next_timestep on way to readwrite
if trigger is self._next_timestep:
if not self._writes:
self.log.error(
"Moved to next timestep without any pending writes!")
else:
self.log.debug(
"Priming ReadWrite trigger so we can playback writes")
self._readwrite.prime(self.react)
return
# work through triggers one by one
is_first = True
self._pending_triggers.append(trigger)
while self._pending_triggers:
trigger = self._pending_triggers.pop(0)
if not is_first and isinstance(trigger, GPITrigger):
self.log.warning(
"A GPI trigger occurred after entering react - this "
"should not happen."
)
assert False
# this only exists to enable the warning above
is_first = False
if trigger not in self._trigger2coros:
# GPI triggers should only be ever pending if there is an
# associated coroutine waiting on that trigger, otherwise it would
# have been unprimed already
if isinstance(trigger, GPITrigger):
self.log.critical(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
trigger.log.info("I'm the culprit")
# For Python triggers this isn't actually an error - we might do
# event.set() without knowing whether any coroutines are actually
# waiting on this event, for example
elif _debug:
self.log.debug(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
continue
# Scheduled coroutines may append to our waiting list so the first
# thing to do is pop all entries waiting on this trigger.
scheduling = self._trigger2coros.pop(trigger)
if _debug:
debugstr = "\n\t".join([coro.__name__ for coro in scheduling])
if len(scheduling):
debugstr = "\n\t" + debugstr
self.log.debug("%d pending coroutines for event %s%s" %
(len(scheduling), str(trigger), debugstr))
# This trigger isn't needed any more
trigger.unprime()
for coro in scheduling:
if _debug:
self.log.debug("Scheduling coroutine %s" % (coro.__name__))
self.schedule(coro, trigger=trigger)
if _debug:
self.log.debug("Scheduled coroutine %s" % (coro.__name__))
# Schedule may have queued up some events so we'll burn through those
while self._pending_events:
if _debug:
self.log.debug("Scheduling pending event %s" %
(str(self._pending_events[0])))
self._pending_events.pop(0).set()
# no more pending triggers
self.advance()
if _debug:
self.log.debug("All coroutines scheduled, handing control back"
" to simulator")
def _event_loop(self, trigger):
"""
Run an event loop triggered by the given trigger.
The loop will keep running until no further triggers fire.
This should be triggered by only:
* The beginning of a test, when there is no trigger to react to
* A GPI trigger
"""
if _profiling:
ctx = profiling_context()
else:
ctx = nullcontext()
with ctx:
# When a trigger fires it is unprimed internally
if _debug:
self.log.debug("Trigger fired: %s" % str(trigger))
# trigger.unprime()
if self._mode == Scheduler._MODE_TERM:
if _debug:
self.log.debug("Ignoring trigger %s since we're terminating" %
str(trigger))
return
if trigger is self._readonly:
self._mode = Scheduler._MODE_READONLY
# Only GPI triggers affect the simulator scheduling mode
elif isinstance(trigger, GPITrigger):
self._mode = Scheduler._MODE_NORMAL
# work through triggers one by one
is_first = True
self._pending_triggers.append(trigger)
while self._pending_triggers:
trigger = self._pending_triggers.pop(0)
if not is_first and isinstance(trigger, GPITrigger):
self.log.warning(
"A GPI trigger occurred after entering react - this "
"should not happen."
)
assert False
# this only exists to enable the warning above
is_first = False
if trigger not in self._trigger2coros:
# GPI triggers should only be ever pending if there is an
# associated coroutine waiting on that trigger, otherwise it would
# have been unprimed already
if isinstance(trigger, GPITrigger):
self.log.critical(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
trigger.log.info("I'm the culprit")
# For Python triggers this isn't actually an error - we might do
# event.set() without knowing whether any coroutines are actually
# waiting on this event, for example
elif _debug:
self.log.debug(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
continue
# Scheduled coroutines may append to our waiting list so the first
# thing to do is pop all entries waiting on this trigger.
scheduling = self._trigger2coros.pop(trigger)
if _debug:
debugstr = "\n\t".join([coro.__name__ for coro in scheduling])
if len(scheduling):
debugstr = "\n\t" + debugstr
self.log.debug("%d pending coroutines for event %s%s" %
(len(scheduling), str(trigger), debugstr))
# This trigger isn't needed any more
trigger.unprime()
for coro in scheduling:
if _debug:
self.log.debug("Scheduling coroutine %s" % (coro.__name__))
self.schedule(coro, trigger=trigger)
if _debug:
self.log.debug("Scheduled coroutine %s" % (coro.__name__))
# Schedule may have queued up some events so we'll burn through those
while self._pending_events:
if _debug:
self.log.debug("Scheduling pending event %s" %
(str(self._pending_events[0])))
self._pending_events.pop(0).set()
# no more pending triggers
self._check_termination()
if _debug:
self.log.debug("All coroutines scheduled, handing control back"
" to simulator")
def react(self, trigger, depth=0):
"""React called when a trigger fires.
We find any coroutines that are waiting on the particular trigger and
schedule them.
"""
if _profiling and not depth:
ctx = profiling_context()
else:
ctx = nullcontext()
with ctx:
# When a trigger fires it is unprimed internally
if _debug:
self.log.debug("Trigger fired: %s" % str(trigger))
# trigger.unprime()
if self._mode == Scheduler._MODE_TERM:
if _debug:
self.log.debug(
"Ignoring trigger %s since we're terminating" %
str(trigger))
return
if trigger is self._readonly:
self._mode = Scheduler._MODE_READONLY
# Only GPI triggers affect the simulator scheduling mode
elif isinstance(trigger, GPITrigger):
self._mode = Scheduler._MODE_NORMAL
# We're the only source of ReadWrite triggers which are only used for
# playing back any cached signal updates
if trigger is self._readwrite:
if _debug:
self.log.debug("Writing cached signal updates")
while self._writes:
handle, value = self._writes.popitem()
handle.setimmediatevalue(value)
self._readwrite.unprime()
return
# Similarly if we've scheduled our next_timestep on way to readwrite
if trigger is self._next_timestep:
if not self._writes:
self.log.error(
"Moved to next timestep without any pending writes!")
else:
self.log.debug(
"Priming ReadWrite trigger so we can playback writes")
self._readwrite.prime(self.react)
return
if trigger not in self._trigger2coros:
# GPI triggers should only be ever pending if there is an
# associated coroutine waiting on that trigger, otherwise it would
# have been unprimed already
if isinstance(trigger, GPITrigger):
self.log.critical(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
trigger.log.info("I'm the culprit")
# For Python triggers this isn't actually an error - we might do
# event.set() without knowing whether any coroutines are actually
# waiting on this event, for example
elif _debug:
self.log.debug(
"No coroutines waiting on trigger that fired: %s" %
str(trigger))
return
# Scheduled coroutines may append to our waiting list so the first
# thing to do is pop all entries waiting on this trigger.
scheduling = self._trigger2coros.pop(trigger)
if _debug:
debugstr = "\n\t".join([coro.__name__ for coro in scheduling])
if len(scheduling):
debugstr = "\n\t" + debugstr
self.log.debug("%d pending coroutines for event %s%s" %
(len(scheduling), str(trigger), debugstr))
# This trigger isn't needed any more
trigger.unprime()
# If the coroutine was waiting on multiple triggers we may be able
# to unprime the other triggers that didn't fire
scheduling_set = set(scheduling)
other_triggers = {
t
for coro in scheduling for t in self._coro2triggers[coro]
} - {trigger}
for pending in other_triggers:
# every coroutine waiting on this trigger is already being woken
if scheduling_set.issuperset(self._trigger2coros[pending]):
if pending.primed:
pending.unprime()
del self._trigger2coros[pending]
for coro in scheduling:
if _debug:
self.log.debug("Scheduling coroutine %s" % (coro.__name__))
self.schedule(coro, trigger=trigger)
if _debug:
self.log.debug("Scheduled coroutine %s" % (coro.__name__))
if not depth:
# Schedule may have queued up some events so we'll burn through those
while self._pending_events:
if _debug:
self.log.debug("Scheduling pending event %s" %
(str(self._pending_events[0])))
self._pending_events.pop(0).set()
while self._pending_triggers:
if _debug:
self.log.debug("Scheduling pending trigger %s" %
(str(self._pending_triggers[0])))
self.react(self._pending_triggers.pop(0), depth=depth + 1)
# We only advance for GPI triggers
if not depth and isinstance(trigger, GPITrigger):
self.advance()
if _debug:
self.log.debug(
"All coroutines scheduled, handing control back"
" to simulator")
