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use flywheel for round-robin

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This commit is contained in:
Darren Ranalli 2007-04-17 06:50:08 +00:00
parent 2e9142fe53
commit 2e55c5bc14
1 changed files with 18 additions and 18 deletions
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36
direct/src/showbase/JobManager.py
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@ -30,11 +30,8 @@ class JobManager:
# how many timeslices to give each job; this is used to efficiently implement # how many timeslices to give each job; this is used to efficiently implement
# the relative job priorities # the relative job priorities
self._jobId2timeslices = {} self._jobId2timeslices = {}
# this is the working copy of _jobId2timeslices that we use to count down how # this is a generator that we use to give high-priority jobs more timeslices
# many timeslices to give each job self._jobIdGenerator = None
self._jobId2timeslicesLeft = {}
# this is used to round-robin the jobs in _jobId2timeslicesLeft
self._curJobIndex = 0
self._highestPriority = Job.Priorities.Normal self._highestPriority = Job.Priorities.Normal
def destroy(self): def destroy(self):
@ -73,8 +70,6 @@ class JobManager:
job._cleanupGenerator() job._cleanupGenerator()
# remove the job's timeslice count # remove the job's timeslice count
self._jobId2timeslices.pop(jobId) self._jobId2timeslices.pop(jobId)
if jobId in self._jobId2timeslicesLeft:
del self._jobId2timeslicesLeft[jobId]
if len(self._pri2jobId2job[pri]) == 0: if len(self._pri2jobId2job[pri]) == 0:
del self._pri2jobId2job[pri] del self._pri2jobId2job[pri]
if pri == self._highestPriority: if pri == self._highestPriority:
@ -136,17 +131,22 @@ class JobManager:
# figure out how long we can run # figure out how long we can run
endT = globalClock.getRealTime() + (self._timeslice * .9) endT = globalClock.getRealTime() + (self._timeslice * .9)
while True: while True:
# round-robin the jobs, dropping them as they run out of priority timeslices if self._jobIdGenerator is None:
# until all timeslices are used # round-robin the jobs, giving high-priority jobs more timeslices
if len(self._jobId2timeslicesLeft) == 0: self._jobIdGenerator = flywheel(
self._jobId2timeslicesLeft = dict(self._jobId2timeslices) self._jobId2timeslices.keys(),
self._curJobIndex = (self._curJobIndex + 1) % len(self._jobId2timeslicesLeft) countFunc = lambda jobId: self._jobId2timeslices[jobId])
jobId = self._jobId2timeslicesLeft.keys()[self._curJobIndex] try:
# use up one of this job's timeslices # grab the next jobId in the sequence
self._jobId2timeslicesLeft[jobId] -= 1 jobId = self._jobIdGenerator.next()
if self._jobId2timeslicesLeft[jobId] == 0: except StopIteration:
del self._jobId2timeslicesLeft[jobId] self._jobIdGenerator = None
pri = self._jobId2pri[jobId] continue
# OK, we've selected a job to run
pri = self._jobId2pri.get(jobId)
if pri is None:
# this job is no longer present
continue
job = self._pri2jobId2job[pri][jobId] job = self._pri2jobId2job[pri][jobId]
gen = job._getGenerator() gen = job._getGenerator()
if __debug__: if __debug__: