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How to use _calculate_core_count method in lisa

Best Python code snippet using lisa_python

dpdktestpmd.py

Source:dpdktestpmd.py

...206        exclude_flags = ""207        for nic in exclude_nics:208            exclude_flags += f' -b "{nic.pci_slot}"'209        return vdev_info + exclude_flags210    def _calculate_core_count(211        self,212        cores_available: int,213        txq: int,214        rxq: int,215        use_max_nics: bool,216        service_cores: int = 1,217    ) -> int:218        # Use either:219        #   - as many cores as are available, minus a core for the system220        #   - 1 per queue on each nic + one per NIC PMD221        # this is a no-op for now,222        # test does not correctly handle multiple nics yet223        if use_max_nics:224            pass225        nics_available = 1226        return min(227            cores_available - 1,228            (nics_available * (txq + rxq)) + (nics_available * service_cores),229        )230    def generate_testpmd_command(231        self,232        nic_to_include: NicInfo,233        vdev_id: int,234        mode: str,235        pmd: str,236        extra_args: str = "",237        txq: int = 0,238        rxq: int = 0,239        service_cores: int = 1,240        use_max_nics: bool = False,241    ) -> str:242        #   testpmd \243        #   -l <core-list> \244        #   -n <num of mem channels> \245        #   -w <pci address of the device you plan to use> \246        #   --vdev="net_vdev_netvsc<id>,iface=<the iface to attach to>" \247        #   -- --port-topology=chained \248        #   --nb-cores <number of cores to use for test pmd> \249        #   --forward-mode=txonly \250        #   --eth-peer=<port id>,<receiver peer MAC address> \251        #   --stats-period <display interval in seconds>252        # if test asks for multicore, it implies using more than one nic253        # otherwise default core count for single nic will be used254        # and then adjusted for queue count255        if not (rxq or txq):256            txq = 1257            rxq = 1258        # calculate the available cores per numa node, infer the offset259        # required for core selection argument260        cores_available = self.node.tools[Lscpu].get_core_count()261        numa_node_count = self.node.tools[Lscpu].get_numa_node_count()262        nic_numa_node = self.node.nics._get_nic_numa_node(nic_to_include.lower)263        cores_per_numa = cores_available // numa_node_count264        numa_core_offset = cores_per_numa * nic_numa_node265        # calculate how many cores to use based on txq/rxq per nic and how many nics266        use_core_count = self._calculate_core_count(267            cores_per_numa, txq, rxq, use_max_nics, service_cores=service_cores268        )269        nic_include_info = self.generate_testpmd_include(270            nic_to_include, vdev_id, use_max_nics271        )272        # set up queue arguments273        if txq or rxq:274            # set number of queues to use for txq and rxq (per nic, default is 1)275            assert_that(txq).described_as(276                "TX queue value must be greater than 0 if txq is used"277            ).is_greater_than(0)278            assert_that(rxq).described_as(279                "RX queue value must be greater than 0 if rxq is used"280            ).is_greater_than(0)...

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