src/kern/kernel_stats.cc

   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 #if THE_ISA == ALPHA_ISA
  38 #include "kern/tru64/tru64_syscalls.hh"
  39 #endif
  40 #include "sim/system.hh"
  41
  42 using namespace std;
  43 using namespace Stats;
  44
  45 namespace Kernel {
  46
  47 Statistics::Statistics(System *system)
  48     : iplLast(0), iplLastTick(0)
  49 {
  50 }
  51
  52 void
  53 Statistics::regStats(const string &_name)
  54 {
  55     myname = _name;
  56
  57     _arm
  58         .name(name() + ".inst.arm")
  59         .desc("number of arm instructions executed")
  60         ;
  61
  62     _quiesce
  63         .name(name() + ".inst.quiesce")
  64         .desc("number of quiesce instructions executed")
  65         ;
  66
  67     _iplCount
  68         .init(32)
  69         .name(name() + ".ipl_count")
  70         .desc("number of times we switched to this ipl")
  71         .flags(total | pdf | nozero | nonan)
  72         ;
  73
  74     _iplGood
  75         .init(32)
  76         .name(name() + ".ipl_good")
  77         .desc("number of times we switched to this ipl from a different ipl")
  78         .flags(total | pdf | nozero | nonan)
  79         ;
  80
  81     _iplTicks
  82         .init(32)
  83         .name(name() + ".ipl_ticks")
  84         .desc("number of cycles we spent at this ipl")
  85         .flags(total | pdf | nozero | nonan)
  86         ;
  87
  88     _iplUsed
  89         .name(name() + ".ipl_used")
  90         .desc("fraction of swpipl calls that actually changed the ipl")
  91         .flags(total | nozero | nonan)
  92         ;
  93
  94     _iplUsed = _iplGood / _iplCount;
  95 #if THE_ISA == ALPHA_ISA
  96     _syscall
  97         .init(SystemCalls<Tru64>::Number)
  98         .name(name() + ".syscall")
  99         .desc("number of syscalls executed")
 100         .flags(total | pdf | nozero | nonan)
 101         ;
 102 #endif
 103
 104     //@todo This needs to get the names of syscalls from an appropriate place.
 105 #if 0
 106     for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
 107         const char *str = SystemCalls<Tru64>::name(i);
 108         if (str) {
 109             _syscall.subname(i, str);
 110         }
 111     }
 112 #endif
 113 }
 114
 115 void
 116 Statistics::swpipl(int ipl)
 117 {
 118     assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
 119
 120     _iplCount[ipl]++;
 121
 122     if (ipl == iplLast)
 123         return;
 124
 125     _iplGood[ipl]++;
 126     _iplTicks[iplLast] += curTick() - iplLastTick;
 127     iplLastTick = curTick();
 128     iplLast = ipl;
 129 }
 130
 131 void
 132 Statistics::serialize(CheckpointOut &cp) const
 133 {
 134     SERIALIZE_SCALAR(iplLast);
 135     SERIALIZE_SCALAR(iplLastTick);
 136 }
 137
 138 void
 139 Statistics::unserialize(CheckpointIn &cp)
 140 {
 141     UNSERIALIZE_SCALAR(iplLast);
 142     UNSERIALIZE_SCALAR(iplLastTick);
 143 }
 144
 145 } // namespace Kernel