CheckTable.cc revision 11266 
1/*
2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
3 * Copyright (c) 2009 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "base/intmath.hh"
31#include "base/random.hh"
32#include "cpu/testers/rubytest/Check.hh"
33#include "cpu/testers/rubytest/CheckTable.hh"
34#include "debug/RubyTest.hh"
35
36CheckTable::CheckTable(int _num_writers, int _num_readers, RubyTester* _tester)
37    : m_num_writers(_num_writers), m_num_readers(_num_readers),
38      m_tester_ptr(_tester)
39{
40    Addr physical = 0;
41
42    const int size1 = 32;
43    const int size2 = 100;
44
45    DPRINTF(RubyTest, "Adding false sharing checks\n");
46    // The first set is to get some false sharing
47    physical = 1000;
48    for (int i = 0; i < size1; i++) {
49        // Setup linear addresses
50        addCheck(physical);
51        physical += CHECK_SIZE;
52    }
53
54    DPRINTF(RubyTest, "Adding cache conflict checks\n");
55    // The next two sets are to get some limited false sharing and
56    // cache conflicts
57    physical = 1000;
58    for (int i = 0; i < size2; i++) {
59        // Setup linear addresses
60        addCheck(physical);
61        physical += 256;
62    }
63
64    DPRINTF(RubyTest, "Adding cache conflict checks2\n");
65    physical = 1000 + CHECK_SIZE;
66    for (int i = 0; i < size2; i++) {
67        // Setup linear addresses
68        addCheck(physical);
69        physical += 256;
70    }
71}
72
73CheckTable::~CheckTable()
74{
75    int size = m_check_vector.size();
76    for (int i = 0; i < size; i++)
77        delete m_check_vector[i];
78}
79
80void
81CheckTable::addCheck(Addr address)
82{
83    if (floorLog2(CHECK_SIZE) != 0) {
84        if (bitSelect(address, 0, CHECK_SIZE_BITS - 1) != 0) {
85            panic("Check not aligned");
86        }
87    }
88
89    for (int i = 0; i < CHECK_SIZE; i++) {
90        if (m_lookup_map.count(address+i)) {
91            // A mapping for this byte already existed, discard the
92            // entire check
93            return;
94        }
95    }
96
97    DPRINTF(RubyTest, "Adding check for address: %s\n", address);
98
99    Check* check_ptr = new Check(address, 100 + m_check_vector.size(),
100                                 m_num_writers, m_num_readers, m_tester_ptr);
101    for (int i = 0; i < CHECK_SIZE; i++) {
102        // Insert it once per byte
103        m_lookup_map[address + i] = check_ptr;
104    }
105    m_check_vector.push_back(check_ptr);
106}
107
108Check*
109CheckTable::getRandomCheck()
110{
111    assert(m_check_vector.size() > 0);
112    return m_check_vector[random_mt.random<unsigned>(0, m_check_vector.size() - 1)];
113}
114
115Check*
116CheckTable::getCheck(const Addr address)
117{
118    DPRINTF(RubyTest, "Looking for check by address: %s\n", address);
119
120    auto i = m_lookup_map.find(address);
121
122    if (i == m_lookup_map.end())
123        return NULL;
124
125    Check* check = i->second;
126    assert(check != NULL);
127    return check;
128}
129
130void
131CheckTable::print(std::ostream& out) const
132{
133}
134