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# /home/coin/svn-release/Blis-0.93.2/Alps/src/AlpsTime.h

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    00001 /*===========================================================================*
    00002  * This file is part of the Abstract Library for Parallel Search (ALPS).     *
    00003  *                                                                           *
    00004  * ALPS is distributed under the Eclipse Public License as part of the       *
    00005  * COIN-OR repository (http://www.coin-or.org).                              *
    00006  *                                                                           *
    00007  * Authors:                                                                  *
    00008  *                                                                           *
    00009  *          Yan Xu, Lehigh University                                        *
    00010  *          Ted Ralphs, Lehigh University                                    *
    00011  *                                                                           *
    00012  * Conceptual Design:                                                        *
    00013  *                                                                           *
    00014  *          Yan Xu, Lehigh University                                        *
    00015  *          Ted Ralphs, Lehigh University                                    *
    00016  *          Laszlo Ladanyi, IBM T.J. Watson Research Center                  *
    00017  *          Matthew Saltzman, Clemson University                             *
    00018  *                                                                           *
    00019  *                                                                           *
    00020  * Copyright (C) 2001-2011, Lehigh University, Yan Xu, and Ted Ralphs.       *
    00021  *===========================================================================*/
    00022
    00023 #ifndef AlpsTime_
    00024 #define AlpsTime_
    00025
    00026 //#############################################################################
    00027
    00028 #undef SEEK_SET
    00029 #undef SEEK_END
    00030 #undef SEEK_CUR
    00031 #include "Alps.h"
    00032 #include "AlpsConfig.h"
    00033
    00034 #include "CoinTime.hpp"
    00035
    00036 #ifdef COIN_HAS_MPI
    00037 # include "mpi.h"
    00038 #endif
    00039
    00040 //#############################################################################
    00041
    00042 #define AlpsCpuTime CoinCpuTime
    00043
    00044 //#############################################################################
    00045
    00046 static inline double AlpsWallClock()
    00047 {
    00048
    00049 #ifndef COIN_HAS_MPI
    00050     double cpu_temp;
    00051 #if defined(_MSC_VER) || defined(__MSVCRT__)
    00052     unsigned int ticksnow;        /* clock_t is same as int */
    00053     ticksnow = (unsigned int)clock();
    00054     cpu_temp = (double)((double)ticksnow/CLOCKS_PER_SEC);
    00055     double sys_temp = 0.;
    00056 #else
    00057     double sys_temp;
    00058     struct rusage usage;
    00059     getrusage(RUSAGE_SELF,&usage);
    00060     cpu_temp = usage.ru_utime.tv_sec;
    00061     cpu_temp += 1.0e-6*((double) usage.ru_utime.tv_usec);
    00062     sys_temp = (double) usage.ru_stime.tv_sec
    00063         + 1.e-6 * (double) usage.ru_stime.tv_usec;
    00064 #endif
    00065     return cpu_temp + sys_temp;
    00066 #else
    00067     // COIN_HAS_MPI
    00068     return MPI_Wtime();
    00069 #endif
    00070 }
    00071
    00072 //#############################################################################
    00073
    00074 /* A timer used to record cpu and wallclock time. */
    00075 class AlpsTimer
    00076 {
    00077  public:  /* Public for parallecl gather. */
    00078
    00079     int clockType_;
    00080
    00082     double limit_;
    00083
    00084     double startCpu_;
    00085     double startWall_;
    00086     double finishCpu_;
    00087     double finishWall_;
    00088
    00090     double cpu_;
    00091
    00093     double wall_;
    00094
    00095  public:
    00096     AlpsTimer() : clockType_(AlpsClockTypeWallClock), limit_(ALPS_DBL_MAX) { reset(); }
    00097     AlpsTimer(double lt) : limit_(lt) { reset(); }
    00098     ~AlpsTimer()  {}
    00099
    00101     void reset() {
    00102         startCpu_ = 0.0;
    00103         startWall_ = 0.0;
    00104         finishCpu_ = 0.0;
    00105         finishWall_ = 0.0;
    00106         cpu_ = 0.0;
    00107         wall_ = 0.0;
    00108     }
    00109
    00111     void start() {
    00112         startCpu_ = AlpsCpuTime();
    00113         startWall_ = AlpsWallClock();
    00114     }
    00115
    00117     void stop() {
    00118         finishCpu_ = AlpsCpuTime();
    00119         finishWall_ = AlpsWallClock();
    00120         cpu_ = finishCpu_ - startCpu_;
    00121         wall_ = finishWall_ - startWall_;
    00122     }
    00123
    00124     //{@
    00125     void setLimit(double lm) { limit_ = lm; }
    00126     double getLimit() const { return limit_; }
    00128
    00130     double getCpuTime() {
    00131         finishCpu_ = AlpsCpuTime();
    00132         cpu_ = finishCpu_ - startCpu_;
    00133         return cpu_;
    00134     }
    00135
    00137     double getWallClock() {
    00138         finishWall_ = AlpsWallClock();
    00139         wall_ = finishWall_ - startWall_;
    00140         return wall_;
    00141     }
    00142
    00144     double getTime() {
    00145       assert( (clockType_ == AlpsClockTypeCpu) ||
    00146               (clockType_ == AlpsClockTypeWallClock) );
    00147       if (clockType_ == AlpsClockTypeCpu) {
    00148         finishCpu_ = AlpsCpuTime();
    00149         cpu_ = finishCpu_ - startCpu_;
    00150         return cpu_;
    00151       }
    00152       else {
    00153         finishWall_ = AlpsWallClock();
    00154         wall_ = finishWall_ - startWall_;
    00155         return wall_;
    00156       }
    00157     }
    00158
    00160     int getClockType(){ return clockType_; }
    00161     void setClockType(int ct){ clockType_ = ct; }
    00162
    00164     bool reachCpuLimit() {
    00165         finishCpu_ = AlpsCpuTime();
    00166         finishWall_ = AlpsWallClock();
    00167         if (finishCpu_ - startCpu_ > limit_) {
    00168             return true;
    00169         }
    00170         else {
    00171             return false;
    00172         }
    00173     }
    00174
    00176     bool reachWallLimit() {
    00177         finishCpu_ = AlpsCpuTime();
    00178         finishWall_ = AlpsWallClock();
    00179         if (finishWall_ - startWall_ > limit_) {
    00180             return true;
    00181         }
    00182         else {
    00183             return false;
    00184         }
    00185     }
    00186 };
    00187
    00188 #endif