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/*
* Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
* All rights reserved.
*
* For use for simulation and test purposes only
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Author: Sooraj Puthoor
*/
#include "gpu-compute/rr_scheduling_policy.hh"
#include "gpu-compute/wavefront.hh"
Wavefront*
RRSchedulingPolicy::chooseWave()
{
Wavefront *selectedWave = nullptr;
// Check to make sure ready list had atleast one schedulable wave
if (scheduleList->size()) {
// For RR policy, select the wave which is at the
// front of the list. The selected wave is popped
// out from the schedule list immediately after selection
// to avoid starvation. It is the responsibility of the
// module invoking the RR scheduler to make surei scheduling
// eligible waves are added to the back of the schedule
// list
selectedWave = scheduleList->front();
scheduleList->erase(scheduleList->begin() + 0);
} else {
panic("Empty ready list");
}
return selectedWave;
}
void
RRSchedulingPolicy::bindList(std::vector<Wavefront*> *list)
{
scheduleList = list;
}
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