+
+ @staticmethod
+ def cpu_slice_of_list_for_nf(node, cpu_node, nf_chains=1, nf_nodes=1,
+ nf_chain=1, nf_node=1, nf_dtc=1, nf_mtcr=2,
+ nf_dtcr=1, skip_cnt=0):
+ """Return list of DUT node related list of CPU numbers. The main
+ computing unit is physical core count.
+
+ :param node: DUT node.
+ :param cpu_node: Numa node number.
+ :param nf_chains: Number of NF chains.
+ :param nf_nodes: Number of NF nodes in chain.
+ :param nf_chain: Chain number indexed from 1.
+ :param nf_node: Node number indexed from 1.
+ :param vs_dtc: Amount of physical cores for vswitch dataplane.
+ :param nf_dtc: Amount of physical cores for NF dataplane.
+ :param nf_mtcr: NF main thread per core ratio.
+ :param nf_dtcr: NF dataplane thread per core ratio.
+ :param skip_cnt: Skip first "skip_cnt" CPUs.
+ :type node: dict
+ :param cpu_node: int.
+ :type nf_chains: int
+ :type nf_nodes: int
+ :type nf_chain: int
+ :type nf_node: int
+ :type vs_dtc: int
+ :type nf_dtc: int or float
+ :type nf_mtcr: int
+ :type nf_dtcr: int
+ :type skip_cnt: int
+ :returns: List of CPUs allocated to NF.
+ :rtype: list
+ :raises RuntimeError: If we require more cpus than available or if
+ placement is not possible due to wrong parameters.
+ """
+ if nf_chain - 1 >= nf_chains:
+ raise RuntimeError("ChainID is higher than total number of chains!")
+ if nf_node - 1 >= nf_nodes:
+ raise RuntimeError("NodeID is higher than chain nodes!")
+
+ smt_used = CpuUtils.is_smt_enabled(node['cpuinfo'])
+ cpu_list = CpuUtils.cpu_list_per_node(node, cpu_node, smt_used)
+ # CPU thread sibling offset.
+ sib = len(cpu_list) / CpuUtils.NR_OF_THREADS
+
+ if not smt_used and not isinstance(nf_dtc, int):
+ raise RuntimeError("Cannot allocate if SMT is not enabled!")
+ # TODO: Workaround as we are using physical core as main unit, we must
+ # adjust number of physical dataplane cores in case of float for further
+ # array referencing. As rounding method in Py2.7 and Py3.x differs, we
+ # are using static mapping. This can be rewritten using flat arrays and
+ # different logic (from Physical core unit to Logical core unit).
+ dtc = 1 if not isinstance(nf_dtc, int) else nf_dtc
+
+ mt_req = ((nf_chains * nf_nodes) + nf_mtcr - 1) / nf_mtcr
+ dt_req = ((nf_chains * nf_nodes) + nf_dtcr - 1) / nf_dtcr
+ cpu_req = skip_cnt + mt_req + dt_req
+
+ if smt_used and cpu_req > len(cpu_list) / CpuUtils.NR_OF_THREADS:
+ raise RuntimeError("Not enough CPU cores available for placement!")
+ elif not smt_used and cpu_req > len(cpu_list):
+ raise RuntimeError("Not enough CPU cores available for placement!")
+
+ offset = (nf_node - 1) + (nf_chain - 1) * nf_nodes
+ try:
+ mt_odd = (offset / mt_req) & 1
+ mt_skip = skip_cnt + (offset % mt_req)
+ dt_odd = (offset / dt_req) & 1
+ dt_skip = skip_cnt + mt_req + (offset % dt_req) * dtc
+ except ZeroDivisionError:
+ raise RuntimeError("Invalid placement combination!")
+ if smt_used:
+ mt_list = [cpu for cpu in cpu_list[mt_skip+sib:mt_skip+sib + 1]] \
+ if mt_odd else [cpu for cpu in cpu_list[mt_skip:mt_skip + 1]]
+ dt_list = [cpu for cpu in cpu_list[dt_skip+sib:dt_skip+sib + dtc]] \
+ if dt_odd else [cpu for cpu in cpu_list[dt_skip:dt_skip + dtc]]
+ if isinstance(nf_dtc, int):
+ dt_list = \
+ [cpu for cpu in cpu_list[dt_skip:dt_skip + dtc]]
+ dt_list += \
+ [cpu for cpu in cpu_list[dt_skip+sib:dt_skip+sib + dtc]]
+ else:
+ mt_list = [cpu for cpu in cpu_list[mt_skip:mt_skip + 1]]
+ dt_list = [cpu for cpu in cpu_list[dt_skip:dt_skip + dtc]]
+
+ return mt_list + dt_list
+
+ @staticmethod
+ def get_affinity_nf(nodes, node, nf_chains=1, nf_nodes=1, nf_chain=1,
+ nf_node=1, vs_dtc=1, nf_dtc=1, nf_mtcr=2, nf_dtcr=1):
+
+ """Get affinity of NF (network function). Result will be used to compute
+ the amount of CPUs and also affinity.
+
+ :param nodes: Physical topology nodes.
+ :param node: SUT node.
+ :param nf_chains: Number of NF chains.
+ :param nf_nodes: Number of NF nodes in chain.
+ :param nf_chain: Chain number indexed from 1.
+ :param nf_node: Node number indexed from 1.
+ :param vs_dtc: Amount of physical cores for vswitch dataplane.
+ :param nf_dtc: Amount of physical cores for NF dataplane.
+ :param nf_mtcr: NF main thread per core ratio.
+ :param nf_dtcr: NF dataplane thread per core ratio.
+ :type nodes: dict
+ :type node: dict
+ :type nf_chains: int
+ :type nf_nodes: int
+ :type nf_chain: int
+ :type nf_node: int
+ :type vs_dtc: int
+ :type nf_dtc: int or float
+ :type nf_mtcr: int
+ :type nf_dtcr: int
+ :returns: List of CPUs allocated to NF.
+ :rtype: list
+ """
+ skip_cnt = Constants.CPU_CNT_SYSTEM + Constants.CPU_CNT_MAIN + vs_dtc
+
+ interface_list = []
+ interface_list.append(
+ BuiltIn().get_variable_value('${{{node}_if1}}'.format(node=node)))
+ interface_list.append(
+ BuiltIn().get_variable_value('${{{node}_if2}}'.format(node=node)))
+
+ cpu_node = Topology.get_interfaces_numa_node(
+ nodes[node], *interface_list)
+
+ return CpuUtils.cpu_slice_of_list_for_nf(
+ node=nodes[node], cpu_node=cpu_node, nf_chains=nf_chains,
+ nf_nodes=nf_nodes, nf_chain=nf_chain, nf_node=nf_node,
+ nf_mtcr=nf_mtcr, nf_dtcr=nf_dtcr, nf_dtc=nf_dtc, skip_cnt=skip_cnt)
+