1 # Copyright (c) 2020 Cisco and/or its affiliates.
2 # Licensed under the Apache License, Version 2.0 (the "License");
3 # you may not use this file except in compliance with the License.
4 # You may obtain a copy of the License at:
6 # http://www.apache.org/licenses/LICENSE-2.0
8 # Unless required by applicable law or agreed to in writing, software
9 # distributed under the License is distributed on an "AS IS" BASIS,
10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 # See the License for the specific language governing permissions and
12 # limitations under the License.
14 """Linux perf utility."""
16 from resources.libraries.python.Constants import Constants
17 from resources.libraries.python.ssh import exec_cmd
18 from resources.libraries.python.topology import NodeType
20 __all__ = [u"PerfUtil"]
24 """Class contains methods for perf utility."""
27 def perf_stat(node, cpu_list=None, duration=1):
28 """Get perf stat read for duration.
30 :param node: Node in the topology.
31 :param cpu_list: CPU List.
32 :param duration: Measure time in seconds.
37 cpu = cpu_list if cpu_list else u"0-$(($(nproc) - 1))"
40 f" --cpu {cpu} --no-aggr"
41 f" --event '{{{Constants.PERF_STAT_EVENTS}}}'"
42 f" --interval-print 1000 "
43 f" -- sleep {int(duration)}"
45 exec_cmd(node, command, sudo=True)
48 def perf_stat_on_all_duts(nodes, cpu_list=None, duration=1):
49 """Get perf stat read for duration on all DUTs.
51 :param nodes: Nodes in the topology.
52 :param cpu_list: CPU List.
53 :param duration: Measure time in seconds.
58 for node in nodes.values():
59 if node[u"type"] == NodeType.DUT:
60 PerfUtil.perf_stat(node, cpu_list=cpu_list, duration=duration)