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qmemman: limit total memory transfer, not each one

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This commit is contained in:
Rafal Wojtczuk 2010-09-01 10:39:39 +02:00
parent c66e0848f3
commit 80771763cf
1 changed files with 12 additions and 3 deletions
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15
dom0/qmemman/qmemman.py
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@ -160,20 +160,29 @@ class SystemState:
scaled_req = self.domdict[dom].memory_actual + scale*(mem - self.domdict[dom].memory_actual) scaled_req = self.domdict[dom].memory_actual + scale*(mem - self.domdict[dom].memory_actual)
return int(scaled_req) return int(scaled_req)
def is_balance_req_significant(self, memset_reqs):
total_memory_transfer = 0
MIN_TOTAL_MEMORY_TRANSFER = 150*1024*1024
for rq in memset_reqs:
dom, mem = rq
memory_change = mem - self.domdict[dom].memory_actual
total_memory_transfer += abs(memory_change)
return total_memory_transfer > MIN_TOTAL_MEMORY_TRANSFER
def do_balance(self): def do_balance(self):
if os.path.isfile('/etc/do-not-membalance'): if os.path.isfile('/etc/do-not-membalance'):
return return
self.refresh_memactual() self.refresh_memactual()
xenfree = self.get_free_xen_memory() xenfree = self.get_free_xen_memory()
memset_reqs = qmemman_algo.balance(xenfree, self.domdict) memset_reqs = qmemman_algo.balance(xenfree, self.domdict)
if not self.is_balance_req_significant(memset_reqs):
return
wait_before_first_inflate = False wait_before_first_inflate = False
i = 0 i = 0
while i < len(memset_reqs): while i < len(memset_reqs):
dom, mem = memset_reqs[i] dom, mem = memset_reqs[i]
memory_change = mem - self.domdict[dom].memory_actual memory_change = mem - self.domdict[dom].memory_actual
if abs(memory_change) < 100*1024*1024:
i = i + 1
continue
if memory_change < 0: if memory_change < 0:
wait_before_first_inflate = True wait_before_first_inflate = True
else: else: