Performance: Add AF_XDP tests

[csit.git] / resources / libraries / python / IrqUtil.py

diff --git a/resources/libraries/python/IrqUtil.py b/resources/libraries/python/IrqUtil.py
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+++ b/resources/libraries/python/IrqUtil.py
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+# Copyright (c) 2021 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""IRQ handling library."""
+
+from resources.libraries.python.CpuUtils import CpuUtils
+from resources.libraries.python.InterfaceUtil import InterfaceUtil
+from resources.libraries.python.ssh import exec_cmd_no_error
+from resources.libraries.python.topology import Topology
+
+
+class IrqUtil:
+    """Contains methods for managing IRQs."""
+
+    @staticmethod
+    def get_pci_interface_irqs(node, pci_addr):
+        """Get IRQs for interface in linux specified by PCI address.
+
+        :param node: Topology node.
+        :param pci_addr: Linux interface PCI address.
+        :type node: dict
+        :type pci_addr: str
+        :returns: List of IRQs attached to specified interface.
+        :rtype: list
+        """
+        interface = InterfaceUtil.pci_to_eth(node, pci_addr)
+        return IrqUtil.get_interface_irqs(node, interface)
+
+    @staticmethod
+    def get_interface_irqs(node, interface):
+        """Get IRQs for interface in linux.
+
+        :param node: Topology node.
+        :param interface: Linux interface name.
+        :type node: dict
+        :type interface: str
+        :returns: List of IRQs attached to specified interface.
+        :rtype: list
+        """
+        irqs = []
+
+        command = f"grep '{interface}-.*TxRx' /proc/interrupts | cut -f1 -d:"
+        message = f"Failed to get IRQs for {interface} on {node['host']}!"
+        stdout, _ = exec_cmd_no_error(
+            node, command, timeout=30, sudo=True, message=message
+        )
+
+        for line in stdout.splitlines():
+            irqs.append(int(line.strip()))
+
+        return irqs
+
+    @staticmethod
+    def set_interface_irqs_affinity(node, interface, cpu_skip_cnt=0, cpu_cnt=1):
+        """Set IRQs affinity for interface in linux.
+
+        :param node: Topology node.
+        :param interface: Topology interface.
+        :param cpu_skip_cnt: Amount of CPU cores to skip.
+        :param cpu_cnt: CPU threads count. (Optional, Default: 0)
+        :param cpu_list: List of CPUs. (Optional, Default: 1)
+        :type node: dict
+        :type interface: str
+        :type cpu_skip_cnt: int
+        :type cpu_cnt: int
+        """
+        cpu_list = CpuUtils.get_affinity_af_xdp(
+            node, interface, cpu_skip_cnt=cpu_skip_cnt, cpu_cnt=cpu_cnt
+        )
+        interface = Topology.get_interface_name(node, interface)
+        irq_list = IrqUtil.get_interface_irqs(node, interface)
+
+        for irq, cpu in zip(irq_list, cpu_list):
+            if cpu < 32:
+                mask = 1 << cpu
+                mask = f"{mask:x}"
+            else:
+                groups = int(cpu/32)
+                mask_fill = u""
+                for _ in range(groups):
+                    mask_fill = f"{mask_fill},00000000"
+                mask = 1 << (cpu - (32 * groups))
+                mask = f"{mask:x}{mask_fill}"
+
+            command = f"sh -c 'echo {mask} > /proc/irq/{irq}/smp_affinity'"
+            message = f"Failed to set IRQ affinity for {irq} on {node['host']}!"
+            exec_cmd_no_error(
+                node, command, timeout=30, sudo=True, message=message
+            )