+ # calculate amount of memory for a single mu
+ self.single_mu = float(e_mem) / sum([rm.dc_max_mu for rm in list(self.registrar.resource_models)])
+ # calculate mem for given flavor
+ mem_limit = self.single_mu * number_mu
+ mem_limit = self._calculate_mem_limit_value(mem_limit)
+ # apply to container if changed
+ if d.mem_limit != mem_limit:
+ LOG.debug("Setting MEM limit for %r: mem_limit = %f MB (op_factor=%f)" %
+ (d.name, mem_limit/1024/1024, self.mem_op_factor))
+ d.updateMemoryLimit(mem_limit=mem_limit)
+
+ def _calculate_mem_limit_value(self, mem_limit):
+ """
+ Calculate actual mem limit as input for cgroup API
+ :param mem_limit: abstract mem limit
+ :return: concrete mem limit
+ """
+ # ATTENTION minimum mem_limit per container is 4MB
+ if mem_limit < 4:
+ mem_limit = 4
+ LOG.warning("Increased MEM limit because it was less than 4.0 MB.")
+ # to byte!
+ return int(mem_limit*1024*1024)
+
+ def get_state_dict(self):
+ """
+ Return the state of the resource model as simple dict.
+ Helper method for logging functionality.
+ :return:
+ """
+ # collect info about all allocated instances
+ allocation_state = dict()
+ for k, d in self._allocated_compute_instances.iteritems():
+ s = dict()
+ s["cpu_period"] = d.cpu_period
+ s["cpu_quota"] = d.cpu_quota
+ s["cpu_shares"] = d.cpu_shares
+ s["mem_limit"] = d.mem_limit
+ s["memswap_limit"] = d.memswap_limit
+ allocation_state[k] = s
+ # final result
+ r = dict()
+ r["e_cpu"] = self.registrar.e_cpu
+ r["e_mem"] = self.registrar.e_mem
+ r["dc_max_cu"] = self.dc_max_cu
+ r["dc_max_mu"] = self.dc_max_mu
+ r["dc_alloc_cu"] = self.dc_alloc_cu
+ r["dc_alloc_mu"] = self.dc_alloc_mu
+ r["single_cu_percentage"] = self.single_cu
+ r["single_mu_percentage"] = self.single_mu
+ r["cpu_op_factor"] = self.cpu_op_factor
+ r["mem_op_factor"] = self.mem_op_factor
+ r["allocation_state"] = allocation_state
+ return r
+
+ def _get_flavor(self, d):
+ """
+ Get flavor assigned to given container.
+ Identified by d.flavor_name.
+ :param d: container
+ :return:
+ """
+ if d.flavor_name not in self._flavors:
+ raise Exception("Flavor %r does not exist" % d.flavor_name)
+ return self._flavors.get(d.flavor_name)