Merge "Added standalone benchmark for keymaster."

//

// Copyright (C) 2019 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.

//

cc_benchmark {

    name: "keymaster_benchmark",

    defaults: ["VtsHalTargetTestDefaults"],

    srcs: [

        "Benchmark.cpp",

    ],

    static_libs: [

        "android.hardware.keymaster@4.0",

        "libkeymaster4support",

        "libsoftkeymasterdevice",

        "libchrome"

    ],

}

# Keymaster Benchmark

The Keymaster Benchmark is a standalone tool for measuring the performance of keymaster implementations.

## Building

Build:

`m  keymaster_benchmark`

Transfer to device/emulator:

`adb sync data`

The benchmark executable should will be located at `data/benchmarktest/keymaster_benchmark/keymaster_benchmark` on the device.

## Usage

Keymaster Benchmark is built on [Google microbenchmark library](https://github.com/google/benchmark).

All of the commandline arguments provided by the microbenchmark library are valid, such as `--benchmark_filter=<regex>` or `benchmark_out_format={json|console|csv}`.

In addition to the command line arguments provided by microbenchmark, `--service_name=<service_name>` is provided allow specification of the keymaster service name, e.g. specify `--service_name=strongbox` to benchmark strongbox.