schedule_stage.hh revision 11308:7d8836fd043d 
1/*
2 * Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
3 * All rights reserved.
4 *
5 * For use for simulation and test purposes only
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the copyright holder nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 * Author: Sooraj Puthoor
34 */
35
36#ifndef __SCHEDULE_STAGE_HH__
37#define __SCHEDULE_STAGE_HH__
38
39#include <utility>
40#include <vector>
41
42#include "gpu-compute/exec_stage.hh"
43#include "gpu-compute/scheduler.hh"
44#include "gpu-compute/scoreboard_check_stage.hh"
45
46// Schedule or execution arbitration stage.
47// From the pool of ready waves in the ready list,
48// one wave is selected for each execution resource.
49// The selection is made based on a scheduling policy
50
51class ComputeUnit;
52class Wavefront;
53
54struct ComputeUnitParams;
55
56class ScheduleStage
57{
58  public:
59    ScheduleStage(const ComputeUnitParams *params);
60    ~ScheduleStage();
61    void init(ComputeUnit *cu);
62    void exec();
63    void arbitrate();
64    // Stats related variables and methods
65    std::string name() { return _name; }
66    void regStats();
67
68  private:
69    ComputeUnit *computeUnit;
70    uint32_t numSIMDs;
71    uint32_t numMemUnits;
72
73    // Each execution resource will have its own
74    // scheduler and a dispatch list
75    std::vector<Scheduler> scheduler;
76
77    // Stores the status of waves. A READY implies the
78    // wave is ready to be scheduled this cycle and
79    // is already present in the readyList
80    std::vector<std::vector<std::pair<Wavefront*, WAVE_STATUS>>*>
81        waveStatusList;
82
83    // List of waves which will be dispatched to
84    // each execution resource. A FILLED implies
85    // dispatch list is non-empty and
86    // execution unit has something to execute
87    // this cycle. Currently, the dispatch list of
88    // an execution resource can hold only one wave because
89    // an execution resource can execute only one wave in a cycle.
90    std::vector<std::pair<Wavefront*, DISPATCH_STATUS>> *dispatchList;
91
92    std::string _name;
93};
94
95#endif // __SCHEDULE_STAGE_HH__
96