b8da9abba7
Change-Id: Ibe46970f3ba25d62ca2ade5cbc2054ad746b2254 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29912 Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com> Tested-by: kokoro <noreply+kokoro@google.com>
75 lines
2.9 KiB
C++
75 lines
2.9 KiB
C++
/*
|
|
* Copyright (c) 2014-2017 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.
|
|
*/
|
|
|
|
#ifndef __GPU_COMPUTE_RR_SCHEDULING_POLICY_HH__
|
|
#define __GPU_COMPUTE_RR_SCHEDULING_POLICY_HH__
|
|
|
|
#include <vector>
|
|
|
|
#include "base/logging.hh"
|
|
#include "gpu-compute/scheduling_policy.hh"
|
|
#include "gpu-compute/wavefront.hh"
|
|
|
|
// round-robin pick among the list of ready waves
|
|
class RRSchedulingPolicy final : public __SchedulingPolicy<RRSchedulingPolicy>
|
|
{
|
|
public:
|
|
RRSchedulingPolicy()
|
|
{
|
|
}
|
|
|
|
static Wavefront*
|
|
__chooseWave(std::vector<Wavefront*> *sched_list)
|
|
{
|
|
panic_if(!sched_list->size(), "RR scheduling policy sched list is "
|
|
"empty.\n");
|
|
Wavefront *selected_wave(nullptr);
|
|
|
|
/**
|
|
* For RR policy, select the wave that 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 sure it is scheduling eligible waves are added to the
|
|
* back of the schedule list.
|
|
*/
|
|
selected_wave = sched_list->front();
|
|
panic_if(!selected_wave, "No wave found by RR scheduling policy.\n");
|
|
sched_list->erase(sched_list->begin());
|
|
|
|
return selected_wave;
|
|
}
|
|
};
|
|
|
|
#endif // __GPU_COMPUTE_RR_SCHEDULING_POLICY_HH__
|