rr_scheduling_policy.hh revision 12696
111308Santhony.gutierrez@amd.com/* 212696Santhony.gutierrez@amd.com * Copyright (c) 2014-2017 Advanced Micro Devices, Inc. 311308Santhony.gutierrez@amd.com * All rights reserved. 411308Santhony.gutierrez@amd.com * 511308Santhony.gutierrez@amd.com * For use for simulation and test purposes only 611308Santhony.gutierrez@amd.com * 711308Santhony.gutierrez@amd.com * Redistribution and use in source and binary forms, with or without 811308Santhony.gutierrez@amd.com * modification, are permitted provided that the following conditions are met: 911308Santhony.gutierrez@amd.com * 1011308Santhony.gutierrez@amd.com * 1. Redistributions of source code must retain the above copyright notice, 1111308Santhony.gutierrez@amd.com * this list of conditions and the following disclaimer. 1211308Santhony.gutierrez@amd.com * 1311308Santhony.gutierrez@amd.com * 2. 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Neither the name of the copyright holder nor the names of its 1812696Santhony.gutierrez@amd.com * contributors may be used to endorse or promote products derived from this 1912696Santhony.gutierrez@amd.com * software without specific prior written permission. 2011308Santhony.gutierrez@amd.com * 2111308Santhony.gutierrez@amd.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 2211308Santhony.gutierrez@amd.com * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2311308Santhony.gutierrez@amd.com * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2411308Santhony.gutierrez@amd.com * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 2511308Santhony.gutierrez@amd.com * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2611308Santhony.gutierrez@amd.com * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2711308Santhony.gutierrez@amd.com * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2811308Santhony.gutierrez@amd.com * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2911308Santhony.gutierrez@amd.com * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 3011308Santhony.gutierrez@amd.com * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 3111308Santhony.gutierrez@amd.com * POSSIBILITY OF SUCH DAMAGE. 3211308Santhony.gutierrez@amd.com * 3312696Santhony.gutierrez@amd.com * Authors: Sooraj Puthoor, 3412696Santhony.gutierrez@amd.com * Anthony Gutierrez 3511308Santhony.gutierrez@amd.com */ 3611308Santhony.gutierrez@amd.com 3712696Santhony.gutierrez@amd.com#ifndef __GPU_COMPUTE_RR_SCHEDULING_POLICY_HH__ 3812696Santhony.gutierrez@amd.com#define __GPU_COMPUTE_RR_SCHEDULING_POLICY_HH__ 3911308Santhony.gutierrez@amd.com 4011308Santhony.gutierrez@amd.com#include <vector> 4111308Santhony.gutierrez@amd.com 4212696Santhony.gutierrez@amd.com#include "gpu-compute/scheduling_policy.hh" 4312696Santhony.gutierrez@amd.com#include "gpu-compute/wavefront.hh" 4411308Santhony.gutierrez@amd.com 4512696Santhony.gutierrez@amd.com// round-robin pick among the list of ready waves 4612696Santhony.gutierrez@amd.comclass RRSchedulingPolicy final : public __SchedulingPolicy<RRSchedulingPolicy> 4711308Santhony.gutierrez@amd.com{ 4811308Santhony.gutierrez@amd.com public: 4912696Santhony.gutierrez@amd.com RRSchedulingPolicy() 5012696Santhony.gutierrez@amd.com { 5112696Santhony.gutierrez@amd.com } 5211308Santhony.gutierrez@amd.com 5312696Santhony.gutierrez@amd.com static Wavefront* 5412696Santhony.gutierrez@amd.com __chooseWave(std::vector<Wavefront*> *sched_list) 5512696Santhony.gutierrez@amd.com { 5612696Santhony.gutierrez@amd.com panic_if(!sched_list->size(), "RR scheduling policy sched list is " 5712696Santhony.gutierrez@amd.com "empty.\n"); 5812696Santhony.gutierrez@amd.com Wavefront *selected_wave(nullptr); 5911308Santhony.gutierrez@amd.com 6012696Santhony.gutierrez@amd.com /** 6112696Santhony.gutierrez@amd.com * For RR policy, select the wave that is at the front of 6212696Santhony.gutierrez@amd.com * the list. The selected wave is popped out from the schedule 6312696Santhony.gutierrez@amd.com * list immediately after selection to avoid starvation. It 6412696Santhony.gutierrez@amd.com * is the responsibility of the module invoking the RR scheduler 6512696Santhony.gutierrez@amd.com * to make sure it is scheduling eligible waves are added to the 6612696Santhony.gutierrez@amd.com * back of the schedule list. 6712696Santhony.gutierrez@amd.com */ 6812696Santhony.gutierrez@amd.com selected_wave = sched_list->front(); 6912696Santhony.gutierrez@amd.com panic_if(!selected_wave, "No wave found by RR scheduling policy.\n"); 7012696Santhony.gutierrez@amd.com sched_list->erase(sched_list->begin()); 7112696Santhony.gutierrez@amd.com 7212696Santhony.gutierrez@amd.com return selected_wave; 7312696Santhony.gutierrez@amd.com } 7411308Santhony.gutierrez@amd.com}; 7511308Santhony.gutierrez@amd.com 7612696Santhony.gutierrez@amd.com#endif // __GPU_COMPUTE_RR_SCHEDULING_POLICY_HH__ 77