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      1 # Copyright 2018 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 from autotest_lib.client.common_lib import utils
      6 
      7 AUTHOR = 'dave.rodgman (a] arm.com'
      8 NAME = 'kernel_IdlePerf'
      9 PURPOSE = 'Test performance impact of idle'
     10 CRITERIA = 'This test will fail if performance drops when CPU idle is enabled'
     11 ATTRIBUTES = 'suite:crosbolt_perf_weekly'
     12 TIME = 'MEDIUM'
     13 TEST_CATEGORY = 'Performance'
     14 TEST_CLASS = 'kernel'
     15 TEST_TYPE = 'server'
     16 
     17 DOC = '''
     18 This server side test suite tests for performance regressions where enabling
     19 CPU idle hurts latency-sensitive workloads (e.g., smooth scrolling).
     20 
     21 This is done by running smoothness.top_25_smooth and comparing results for
     22 idle enabled vs. disabled: ideally, there should be only a very small impact.
     23 
     24 This test currently only supports Arm aarch64.
     25 
     26 Pass local=True to run with local telemetry and no AFE server.
     27 '''
     28 
     29 def run_benchmark(machine):
     30     host = hosts.create_host(machine)
     31     job.run_test('kernel_IdlePerf', host=host,
     32                  args=utils.args_to_dict(args))
     33 
     34 parallel_simple(run_benchmark, machines)
     35