rr_scheduling_policy.cc

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/*
 * Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
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 *
 * For use for simulation and test purposes only
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 * and/or other materials provided with the distribution.
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 * 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"
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * 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;
}