kernel_stats.cc revision 7823:dac01f14f20f 
1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Lisa Hsu
29 *          Nathan Binkert
30 */
31
32#include <string>
33
34#include "base/trace.hh"
35#include "cpu/thread_context.hh"
36#include "kern/kernel_stats.hh"
37#include "kern/tru64/tru64_syscalls.hh"
38#include "sim/system.hh"
39
40using namespace std;
41using namespace Stats;
42
43namespace Kernel {
44
45Statistics::Statistics(System *system)
46    : iplLast(0), iplLastTick(0)
47{
48}
49
50void
51Statistics::regStats(const string &_name)
52{
53    myname = _name;
54
55    _arm
56        .name(name() + ".inst.arm")
57        .desc("number of arm instructions executed")
58        ;
59
60    _quiesce
61        .name(name() + ".inst.quiesce")
62        .desc("number of quiesce instructions executed")
63        ;
64
65    _iplCount
66        .init(32)
67        .name(name() + ".ipl_count")
68        .desc("number of times we switched to this ipl")
69        .flags(total | pdf | nozero | nonan)
70        ;
71
72    _iplGood
73        .init(32)
74        .name(name() + ".ipl_good")
75        .desc("number of times we switched to this ipl from a different ipl")
76        .flags(total | pdf | nozero | nonan)
77        ;
78
79    _iplTicks
80        .init(32)
81        .name(name() + ".ipl_ticks")
82        .desc("number of cycles we spent at this ipl")
83        .flags(total | pdf | nozero | nonan)
84        ;
85
86    _iplUsed
87        .name(name() + ".ipl_used")
88        .desc("fraction of swpipl calls that actually changed the ipl")
89        .flags(total | nozero | nonan)
90        ;
91
92    _iplUsed = _iplGood / _iplCount;
93
94    _syscall
95        .init(SystemCalls<Tru64>::Number)
96        .name(name() + ".syscall")
97        .desc("number of syscalls executed")
98        .flags(total | pdf | nozero | nonan)
99        ;
100
101    //@todo This needs to get the names of syscalls from an appropriate place.
102#if 0
103    for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
104        const char *str = SystemCalls<Tru64>::name(i);
105        if (str) {
106            _syscall.subname(i, str);
107        }
108    }
109#endif
110}
111
112void
113Statistics::swpipl(int ipl)
114{
115    assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
116
117    _iplCount[ipl]++;
118
119    if (ipl == iplLast)
120        return;
121
122    _iplGood[ipl]++;
123    _iplTicks[iplLast] += curTick() - iplLastTick;
124    iplLastTick = curTick();
125    iplLast = ipl;
126}
127
128void
129Statistics::serialize(ostream &os)
130{
131    SERIALIZE_SCALAR(iplLast);
132    SERIALIZE_SCALAR(iplLastTick);
133}
134
135void
136Statistics::unserialize(Checkpoint *cp, const string &section)
137{
138    UNSERIALIZE_SCALAR(iplLast);
139    UNSERIALIZE_SCALAR(iplLastTick);
140}
141
142} // namespace Kernel
143