1cb93a386Sopenharmony_ci/*
2cb93a386Sopenharmony_ci * Copyright 2015 Google Inc.
3cb93a386Sopenharmony_ci *
4cb93a386Sopenharmony_ci * Use of this source code is governed by a BSD-style license that can be
5cb93a386Sopenharmony_ci * found in the LICENSE file.
6cb93a386Sopenharmony_ci */
7cb93a386Sopenharmony_ci
8cb93a386Sopenharmony_ci#include "bench/Benchmark.h"
9cb93a386Sopenharmony_ci
10cb93a386Sopenharmony_ci// This benchmark's runtime should be fairly constant for a given machine,
11cb93a386Sopenharmony_ci// so it can be used as a baseline to control for thermal or other throttling.
12cb93a386Sopenharmony_ci
13cb93a386Sopenharmony_cistruct ControlBench : public Benchmark {
14cb93a386Sopenharmony_ci    const char* onGetName() override { return "control"; }
15cb93a386Sopenharmony_ci    bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
16cb93a386Sopenharmony_ci
17cb93a386Sopenharmony_ci    void onDraw(int loops, SkCanvas*) override {
18cb93a386Sopenharmony_ci        // Nothing terribly useful: force a memory read, a memory write, and some math.
19cb93a386Sopenharmony_ci        SK_MAYBE_UNUSED volatile uint32_t rand = 0;
20cb93a386Sopenharmony_ci        for (int i = 0; i < 1000*loops; i++) {
21cb93a386Sopenharmony_ci            rand *= 1664525;
22cb93a386Sopenharmony_ci            rand += 1013904223;
23cb93a386Sopenharmony_ci        }
24cb93a386Sopenharmony_ci    }
25cb93a386Sopenharmony_ci};
26cb93a386Sopenharmony_ciDEF_BENCH(return new ControlBench;)
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