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bufferResidencyTracker.h
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file bufferResidencyTracker.h
10 * @author drose
11 * @date 2006-03-16
12 */
13
14#ifndef BUFFERRESIDENCYTRACKER_H
15#define BUFFERRESIDENCYTRACKER_H
16
17#include "pandabase.h"
18#include "bufferContextChain.h"
19#include "pStatCollector.h"
20
21class BufferContext;
22
23/**
24 * This class is used to keep track of the current state of all the
25 * BufferContexts for a particular graphics context: whether each one is
26 * active (rendered this frame) or inactive (not rendered this frame), and
27 * whether it is resident or nonresident in video memory.
28 *
29 * The primary purpose of this class is to facilitate PStats reporting of
30 * video card memory usage.
31 */
32class EXPCL_PANDA_GOBJ BufferResidencyTracker {
33public:
34 BufferResidencyTracker(const std::string &pgo_name, const std::string &type_name);
36
37 void begin_frame(Thread *current_thread);
38 void end_frame(Thread *current_thread);
39 void set_levels();
40
41 INLINE BufferContextChain &get_inactive_nonresident();
42 INLINE BufferContextChain &get_active_nonresident();
43 INLINE BufferContextChain &get_inactive_resident();
44 INLINE BufferContextChain &get_active_resident();
45
46 void write(std::ostream &out, int indent_level) const;
47
48private:
49 void move_inactive(BufferContextChain &inactive, BufferContextChain &active);
50
51private:
52 enum State {
53 // Individual bits.
54 S_active = 0x01,
55 S_resident = 0x02,
56
57 // Aggregate bits: unions of the above.
58 S_inactive_nonresident = 0x00,
59 S_active_nonresident = 0x01,
60 S_inactive_resident = 0x02,
61 S_active_resident = 0x03,
62
63 // The total number of different states.
64 S_num_states = 4,
65 };
66
67 // One chain for each of the possible states, ordered as above.
68 BufferContextChain _chains[S_num_states];
69
70 // A couple of PStatCollectors just to organize names.
71 static PStatCollector _gmem_collector;
72 PStatCollector _pgo_collector;
73
74 // One PStatCollector for each state. These are ordered in reverse order
75 // that we would like them to appear in the PStats graph.
76 PStatCollector _active_resident_collector;
77 PStatCollector _active_nonresident_collector;
78 PStatCollector _inactive_resident_collector;
79 PStatCollector _inactive_nonresident_collector;
80
81 // The frame number currently considered "active".
82 int _active_frame;
83 friend class BufferContext;
84};
85
87
88#endif
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
This class maintains a linked list of BufferContexts that might be allocated on the graphics card in ...
This is a base class for those kinds of SavedContexts that occupy an easily-measured (and substantial...
This class is used to keep track of the current state of all the BufferContexts for a particular grap...
A lightweight class that represents a single element that may be timed and/or counted via stats.
A thread; that is, a lightweight process.
Definition thread.h:46
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.