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How to use change_device_channels_info method in lisa

Best Python code snippet using lisa_python

ethtool.py

Source:ethtool.py

...476        if vcpu_count < device_channel_info.max_channels:477            device_channel_info.max_channels = vcpu_count478        device.device_channel = device_channel_info479        return device_channel_info480    def change_device_channels_info(481        self,482        interface: str,483        channel_count: int,484    ) -> DeviceChannel:485        change_result = self.run(486            f"-L {interface} combined {channel_count}", sudo=True, force_run=True487        )488        change_result.assert_exit_code(489            message=f" Couldn't change device {interface} channels count."490        )491        return self.get_device_channels_info(interface, force_run=True)492    def get_device_enabled_features(493        self, interface: str, force_run: bool = False494    ) -> DeviceFeatures:...

networksettings.py

Source:networksettings.py

...172                )173                continue174            skip_test = False175            for new_channels in range(1, max_channels + 1):176                channels_info = ethtool.change_device_channels_info(177                    interface, new_channels178                )179                assert_that(180                    channels_info.current_channels,181                    f"Setting channels count to {new_channels} didn't succeed",182                ).is_equal_to(new_channels)183            if new_channels != channels:184                # revert back the channel count to original value185                channels_info = ethtool.change_device_channels_info(interface, channels)186                assert_that(187                    channels_info.current_channels,188                    f"Reverting channels count to its original value {channels} didn't"189                    f" succeed. Current Value is {channels_info.current_channels}",190                ).is_equal_to(channels)191        if skip_test:192            raise SkippedException(193                "Max Channel count for all the devices is <=1 and cannot be"194                " tested for changing. Skipping test."195            )196    @TestCaseMetadata(197        description="""198            This test case verifies required device features are enabled.199            Steps:...

cpusuite.py

Source:cpusuite.py

...176            node.tools[Ethtool].get_device_channels_info("eth0", True)177        ).current_channels178        # set channel count into 1 to get idle cpus179        if len(idle_cpus) == 0:180            node.tools[Ethtool].change_device_channels_info("eth0", 1)181            idle_cpus = get_idle_cpus(node)182            log.debug(f"idle cpus: {idle_cpus}")183        if len(idle_cpus) == 0:184            raise SkippedException(185                "all of the cpu are associated vmbus channels, "186                "no idle cpu can be used to test hotplug."187            )188        # set idle cpu state offline and change channels189        # current max channel will be cpu_count - len(idle_cpus)190        # check channels of synthetic network adapter align with current setting channel191        try:192            # take idle cpu to offline193            set_cpu_state_serial(log, node, idle_cpus, CPUState.OFFLINE)194            # get vmbus channels of synthetic network adapter. the synthetic network195            # drivers have class id "f8615163-df3e-46c5-913f-f2d2f965ed0e"196            node.tools[Lsvmbus].get_device_channels(force_run=True)197            cpu_count = node.tools[Lscpu].get_core_count()198            # current max channel count need minus count of idle cpus199            max_channel_count = cpu_count - len(idle_cpus)200            # change current channel201            first_channel_count = random.randint(1, min(max_channel_count, 64))202            node.tools[Ethtool].change_device_channels_info("eth0", first_channel_count)203            # verify that the added channels do not handle interrupts on offline cpu204            lsvmbus_channels = node.tools[Lsvmbus].get_device_channels(force_run=True)205            for channel in lsvmbus_channels:206                # verify synthetic network adapter channels align with expected value207                if channel.class_id == "f8615163-df3e-46c5-913f-f2d2f965ed0e":208                    log.debug(f"Network synthetic channel: {channel}")209                    assert_that(channel.channel_vp_map).is_length(first_channel_count)210                # verify that devices do not handle interrupts on offline cpu211                for channel_vp in channel.channel_vp_map:212                    assert_that(channel_vp.target_cpu).is_not_in(idle_cpus)213            # reset idle cpu to online214            set_cpu_state_serial(log, node, idle_cpus, CPUState.ONLINE)215            # reset max and current channel count into original ones216            # by reloading hv_netvsc driver217            node.tools[Modprobe].reload(["hv_netvsc"])218            # change the combined channels count after all cpus online219            second_channel_count = random.randint(1, min(cpu_count, 64))220            while True:221                if first_channel_count != second_channel_count:222                    break223                second_channel_count = random.randint(1, min(cpu_count, 64))224            node.tools[Ethtool].change_device_channels_info(225                "eth0", second_channel_count226            )227            # verify that the network adapter channels count changed228            # into new channel count229            lsvmbus_channels = node.tools[Lsvmbus].get_device_channels(force_run=True)230            for channel in lsvmbus_channels:231                # verify that channels were added to synthetic network adapter232                if channel.class_id == "f8615163-df3e-46c5-913f-f2d2f965ed0e":233                    log.debug(f"Network synthetic channel: {channel}")234                    assert_that(channel.channel_vp_map).is_length(second_channel_count)235        finally:236            # reset idle cpu to online237            set_cpu_state_serial(log, node, idle_cpus, CPUState.ONLINE)238            # restore channel count into origin value239            current_device_channel = (240                node.tools[Ethtool].get_device_channels_info("eth0", True)241            ).current_channels242            if current_device_channel != origin_device_channel:243                node.tools[Ethtool].change_device_channels_info(244                    "eth0", origin_device_channel245                )246            # when kernel doesn't support set vmbus channels target cpu feature, the247            # dict which stores original status is empty, nothing need to be restored....

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