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#!/usr/bin/env python
#
# Copyright (C) 2017 The Android Open Source Project
#
# 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.
#
import json
import logging
from vts.runners.host import asserts
from vts.runners.host import base_test
from vts.runners.host import const
from vts.runners.host import test_runner
from vts.utils.python.controllers import android_device
from vts.utils.python.cpu import cpu_frequency_scaling
class HwBinderLatencyTest(base_test.BaseTestClass):
"""A test case for the hwbinder latency benchmarking.
Sample output of libhwbinder_latency
{
"cfg":{"pair":6,"iterations":166,"deadline_us":2500,"passthrough":1},
"fifo_0_data": [15052, ...],
"fifo_1_data": [...],
...
"ALL":{"SYNC":"GOOD","S":1992,"I":1992,"R":1,
"other_ms":{ "avg":0.0048, "wst":0.32, "bst":0.0022, "miss":0, "meetR":1},
"fifo_ms": { "avg":0.0035, "wst":0.037, "bst":0.0021, "miss":0, "meetR":1},
"otherdis":{ "p50":0.19531, "p90":0.19531, "p95":0.19531, "p99": 0.19531},
"fifodis": { "p50":0.19531, "p90":0.19531, "p95":0.19531, "p99": 0.19531}
},
"P0":{...
},
...
"inheritance": "PASS"
}
"""
# The order of the columns in the output table
_MS_COLUMNS = ["avg", "wst", "bst", "miss", "meetR"]
_DIS_COLUMNS = ["p50", "p90", "p95", "p99"]
# The keys in the JSON object
_CFG = "cfg"
_PAIR = "pair"
_ALL = "ALL"
_OTHER_MS = "other_ms"
_FIFO_MS = "fifo_ms"
_OTHERDIS = "otherdis"
_FIFODIS = "fifodis"
_INHERITANCE = "inheritance"
def setUpClass(self):
required_params = ["hidl_hal_mode"]
self.getUserParams(required_params)
self.dut = self.registerController(android_device)[0]
self.dut.shell.InvokeTerminal("one")
self._cpu_freq = cpu_frequency_scaling.CpuFrequencyScalingController(self.dut)
self._cpu_freq.DisableCpuScaling()
def setUp(self):
self._cpu_freq.SkipIfThermalThrottling(retry_delay_secs=30)
def tearDown(self):
self._cpu_freq.SkipIfThermalThrottling()
def tearDownClass(self):
self._cpu_freq.EnableCpuScaling()
def testRunBenchmark32Bit(self):
result = self._runBenchmark(32)
self._addBenchmarkTableToResult(result, 32)
self._uploadResult(result, 32)
def testRunBenchmark64Bit(self):
result = self._runBenchmark(64)
self._addBenchmarkTableToResult(result, 64)
self._uploadResult(result, 64)
def _runBenchmark(self, bits):
"""Runs the native binary and parses its result.
Args:
bits: integer (32 or 64), the bitness of the binary to run.
Returns:
dict, the benchmarking result converted from native binary's JSON
output.
"""
logging.info("Start %d-bit hwbinder latency test with HIDL mode=%s",
bits, self.hidl_hal_mode)
binary = "/data/local/tmp/%s/libhwbinder_latency%s" % (bits, bits)
min_cpu, max_cpu = self._cpu_freq.GetMinAndMaxCpuNo()
iterations = 1000 // (max_cpu - min_cpu)
results = self.dut.shell.one.Execute([
"chmod 755 %s" % binary,
"VTS_ROOT_PATH=/data/local/tmp " \
"LD_LIBRARY_PATH=/system/lib%s:/data/local/tmp/%s/hw:"
"/data/local/tmp/%s:$LD_LIBRARY_PATH "
"%s -raw_data -pair %d -i %d -m %s" % (bits, bits, bits,
binary, max_cpu - min_cpu, iterations,
self.hidl_hal_mode.encode("utf-8"))])
# Parses the result.
asserts.assertEqual(len(results[const.STDOUT]), 2)
logging.info("stderr: %s", results[const.STDERR][1])
logging.info("stdout: %s", results[const.STDOUT][1])
asserts.assertFalse(
any(results[const.EXIT_CODE]),
"testRunBenchmark%sBit failed." % (bits))
json_result = json.loads(results[const.STDOUT][1]);
asserts.assertTrue(json_result[self._INHERITANCE] == "PASS",
"Scheduler does not support priority inheritance.");
return json_result
def _createRow(self, pair_name, ms_result, dis_result):
"""Creates a row from the JSON output.
Args:
pair_name: string, the pair name in the first column.
ms_result: dict, the fifo_ms or other_ms object.
dis_result: dict, the fifodis or otherdis object.
Returns:
the list containing pair_name and the values in the objects.
"""
row = [pair_name]
row.extend([ms_result[x] for x in self._MS_COLUMNS])
row.extend([dis_result[x] for x in self._DIS_COLUMNS])
return row
def _addBenchmarkTableToResult(self, result, bits):
pair_cnt = result[self._CFG][self._PAIR]
row_names = ["P" + str(i) for i in range(pair_cnt)] + [self._ALL]
col_names = ["pair"] + self._MS_COLUMNS + self._DIS_COLUMNS
fifo_table = [col_names]
other_table = [col_names]
for row_name in row_names:
pair_result = result[row_name]
fifo_table.append(self._createRow(row_name,
pair_result[self._FIFO_MS], pair_result[self._FIFODIS]))
other_table.append(self._createRow(row_name,
pair_result[self._OTHER_MS], pair_result[self._OTHERDIS]))
self.addTableToResult(
"hwbinder_latency_%sbits_fifo" % bits,fifo_table)
self.addTableToResult(
"hwbinder_latency_%sbits_other" % bits, other_table)
def _uploadResult(self, result, bits):
"""Uploads the output of benchmark program to web DB.
Args:
result: dict which is the benchmarking result.
bits: integer (32 or 64).
"""
opts = ["hidl_hal_mode=%s" % self.hidl_hal_mode.encode("utf-8")];
min_cpu, max_cpu = self._cpu_freq.GetMinAndMaxCpuNo()
for i in range(max_cpu - min_cpu):
self.web.AddProfilingDataUnlabeledVector(
"hwbinder_latency_%sbits" % bits,
result["fifo_%d_data" % i], options=opts,
x_axis_label="hwbinder latency",
y_axis_label="Frequency")
if __name__ == "__main__":
test_runner.main()
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