kernel_stats.cc revision 3546:c4074658f1e1
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 <map> 33#include <stack> 34#include <string> 35 36#include "arch/alpha/osfpal.hh" 37#include "base/trace.hh" 38#include "cpu/thread_context.hh" 39#include "kern/kernel_stats.hh" 40#include "kern/tru64/tru64_syscalls.hh" 41#include "sim/system.hh" 42 43using namespace std; 44using namespace Stats; 45 46namespace Kernel { 47 48const char *modestr[] = { "kernel", "user", "idle" }; 49 50Statistics::Statistics(System *system) 51 : idleProcess((Addr)-1), themode(kernel), lastModeTick(0), 52 iplLast(0), iplLastTick(0) 53{ 54} 55 56void 57Statistics::regStats(const string &_name) 58{ 59 myname = _name; 60 61 _arm 62 .name(name() + ".inst.arm") 63 .desc("number of arm instructions executed") 64 ; 65 66 _quiesce 67 .name(name() + ".inst.quiesce") 68 .desc("number of quiesce instructions executed") 69 ; 70 71 _hwrei 72 .name(name() + ".inst.hwrei") 73 .desc("number of hwrei instructions executed") 74 ; 75 76 _iplCount 77 .init(32) 78 .name(name() + ".ipl_count") 79 .desc("number of times we switched to this ipl") 80 .flags(total | pdf | nozero | nonan) 81 ; 82 83 _iplGood 84 .init(32) 85 .name(name() + ".ipl_good") 86 .desc("number of times we switched to this ipl from a different ipl") 87 .flags(total | pdf | nozero | nonan) 88 ; 89 90 _iplTicks 91 .init(32) 92 .name(name() + ".ipl_ticks") 93 .desc("number of cycles we spent at this ipl") 94 .flags(total | pdf | nozero | nonan) 95 ; 96 97 _iplUsed 98 .name(name() + ".ipl_used") 99 .desc("fraction of swpipl calls that actually changed the ipl") 100 .flags(total | nozero | nonan) 101 ; 102 103 _iplUsed = _iplGood / _iplCount; 104 105 _callpal 106 .init(256) 107 .name(name() + ".callpal") 108 .desc("number of callpals executed") 109 .flags(total | pdf | nozero | nonan) 110 ; 111 112 for (int i = 0; i < PAL::NumCodes; ++i) { 113 const char *str = PAL::name(i); 114 if (str) 115 _callpal.subname(i, str); 116 } 117 118 _syscall 119 .init(SystemCalls<Tru64>::Number) 120 .name(name() + ".syscall") 121 .desc("number of syscalls executed") 122 .flags(total | pdf | nozero | nonan) 123 ; 124 125 for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) { 126 const char *str = SystemCalls<Tru64>::name(i); 127 if (str) { 128 _syscall.subname(i, str); 129 } 130 } 131 132 _mode 133 .init(cpu_mode_num) 134 .name(name() + ".mode_switch") 135 .desc("number of protection mode switches") 136 ; 137 138 for (int i = 0; i < cpu_mode_num; ++i) 139 _mode.subname(i, modestr[i]); 140 141 _modeGood 142 .init(cpu_mode_num) 143 .name(name() + ".mode_good") 144 ; 145 146 for (int i = 0; i < cpu_mode_num; ++i) 147 _modeGood.subname(i, modestr[i]); 148 149 _modeFraction 150 .name(name() + ".mode_switch_good") 151 .desc("fraction of useful protection mode switches") 152 .flags(total) 153 ; 154 155 for (int i = 0; i < cpu_mode_num; ++i) 156 _modeFraction.subname(i, modestr[i]); 157 158 _modeFraction = _modeGood / _mode; 159 160 _modeTicks 161 .init(cpu_mode_num) 162 .name(name() + ".mode_ticks") 163 .desc("number of ticks spent at the given mode") 164 .flags(pdf) 165 ; 166 for (int i = 0; i < cpu_mode_num; ++i) 167 _modeTicks.subname(i, modestr[i]); 168 169 _swap_context 170 .name(name() + ".swap_context") 171 .desc("number of times the context was actually changed") 172 ; 173} 174 175void 176Statistics::setIdleProcess(Addr idlepcbb, ThreadContext *tc) 177{ 178 assert(themode == kernel); 179 idleProcess = idlepcbb; 180 themode = idle; 181 changeMode(themode, tc); 182} 183 184void 185Statistics::changeMode(cpu_mode newmode, ThreadContext *tc) 186{ 187 _mode[newmode]++; 188 189 if (newmode == themode) 190 return; 191 192 DPRINTF(Context, "old mode=%-8s new mode=%-8s\n", 193 modestr[themode], modestr[newmode]); 194 195 _modeGood[newmode]++; 196 _modeTicks[themode] += curTick - lastModeTick; 197 198 lastModeTick = curTick; 199 themode = newmode; 200} 201 202void 203Statistics::swpipl(int ipl) 204{ 205 assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n"); 206 207 _iplCount[ipl]++; 208 209 if (ipl == iplLast) 210 return; 211 212 _iplGood[ipl]++; 213 _iplTicks[iplLast] += curTick - iplLastTick; 214 iplLastTick = curTick; 215 iplLast = ipl; 216} 217 218void 219Statistics::mode(cpu_mode newmode, ThreadContext *tc) 220{ 221 Addr pcbb = tc->readMiscReg(AlphaISA::IPR_PALtemp23); 222 223 if (newmode == kernel && pcbb == idleProcess) 224 newmode = idle; 225 226 changeMode(newmode, tc); 227} 228 229void 230Statistics::context(Addr oldpcbb, Addr newpcbb, ThreadContext *tc) 231{ 232 assert(themode != user); 233 234 _swap_context++; 235 changeMode(newpcbb == idleProcess ? idle : kernel, tc); 236} 237 238void 239Statistics::callpal(int code, ThreadContext *tc) 240{ 241 if (!PAL::name(code)) 242 return; 243 244 _callpal[code]++; 245 246 switch (code) { 247 case PAL::callsys: { 248 int number = tc->readIntReg(0); 249 if (SystemCalls<Tru64>::validSyscallNumber(number)) { 250 int cvtnum = SystemCalls<Tru64>::convert(number); 251 _syscall[cvtnum]++; 252 } 253 } break; 254 } 255} 256 257void 258Statistics::serialize(ostream &os) 259{ 260 int exemode = themode; 261 SERIALIZE_SCALAR(exemode); 262 SERIALIZE_SCALAR(idleProcess); 263 SERIALIZE_SCALAR(iplLast); 264 SERIALIZE_SCALAR(iplLastTick); 265 SERIALIZE_SCALAR(lastModeTick); 266} 267 268void 269Statistics::unserialize(Checkpoint *cp, const string §ion) 270{ 271 int exemode; 272 UNSERIALIZE_SCALAR(exemode); 273 UNSERIALIZE_SCALAR(idleProcess); 274 UNSERIALIZE_SCALAR(iplLast); 275 UNSERIALIZE_SCALAR(iplLastTick); 276 UNSERIALIZE_SCALAR(lastModeTick); 277 themode = (cpu_mode)exemode; 278} 279 280/* end namespace Kernel */ } 281