1 #ifndef _TCUCPUWARMUP_HPP 2 #define _TCUCPUWARMUP_HPP 3 /*------------------------------------------------------------------------- 4 * drawElements Quality Program Tester Core 5 * ---------------------------------------- 6 * 7 * Copyright 2014 The Android Open Source Project 8 * 9 * Licensed under the Apache License, Version 2.0 (the "License"); 10 * you may not use this file except in compliance with the License. 11 * You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 * 21 *//*! 22 * \file 23 * \brief CPU warm-up utility, used to counteract CPU throttling. 24 *//*--------------------------------------------------------------------*/ 25 26 namespace tcu 27 { 28 29 //! Does some unused calculations to try and get the CPU working at full speed. 30 void warmupCPU(void); 31 32 namespace warmupCPUInternal 33 { 34 35 // \note Used in an attempt to prevent compiler from doing optimizations. Not supposed to be touched elsewhere. 36 37 class Unused 38 { 39 public: Unused(void)40 Unused(void) : m_v(new float) 41 { 42 } ~Unused(void)43 ~Unused(void) 44 { 45 delete m_v; 46 } 47 48 volatile float *volatile m_v; 49 }; 50 51 extern volatile Unused g_unused; 52 53 } // namespace warmupCPUInternal 54 55 } // namespace tcu 56 57 #endif // _TCUCPUWARMUP_HPP 58