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authorpmikus <pmikus@cisco.com>2021-05-26 16:06:02 +0000
committerPeter Mikus <pmikus@cisco.com>2021-06-04 06:45:23 +0000
commit4a0b0f2b633bb9fd15a7dc8357650a9ac7846edd (patch)
tree71151a129bfc83d9da837283c78972f0f72125ee /resources/libraries/python/IrqUtil.py
parent5468f3b23b892541026ab29aa37b5131e7e30a82 (diff)
Performance: Add AF_XDP tests
- enabling for fortville, columbiaville - enabling experimental for mlx Signed-off-by: pmikus <pmikus@cisco.com> Change-Id: I1b7ceb54769f4a0089ac7309350499e60c5cca0a
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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
+ )