1 /* 2 Low cost access to system time. This, in general, should not 3 be included in user programs. 4 */ 5 6 #if !defined(__PTIME_H) 7 #define __PTIME_H 8 9 #include <petscsys.h> 10 #if defined(PETSC_HAVE_SYS_TIME_H) 11 #include <sys/types.h> 12 #include <sys/time.h> 13 #endif 14 #if defined(PETSC_NEEDS_GETTIMEOFDAY_PROTO) 15 EXTERN_C_BEGIN 16 extern int gettimeofday(struct timeval *,struct timezone *); 17 EXTERN_C_END 18 #endif 19 20 /* Global counters */ 21 PETSC_EXTERN PetscLogDouble petsc_BaseTime; 22 23 /* 24 PetscTime - Returns the current time of day in seconds. 25 26 Synopsis: 27 PetscTime(PetscLogDouble v) 28 29 Not Collective 30 31 Output Parameter: 32 . v - time counter 33 34 35 Usage: 36 PetscLogDouble v; 37 PetscTime(v); 38 .... perform some calculation ... 39 printf("Time for operation %g\n",v); 40 41 Notes: 42 Since the PETSc libraries incorporate timing of phases and operations, 43 PetscTime() is intended only for timing of application codes. 44 The options database commands -log, -log_summary, and -log_all activate 45 PETSc library timing. See the <A href="../../docs/manual.pdf">Users Manual</A> for more details. 46 47 .seealso: PetscTimeSubtract(), PetscTimeAdd() 48 49 .keywords: Petsc, time 50 */ 51 52 /* 53 PetscTimeSubtract - Subtracts the current time of day (in seconds) from 54 the value v. 55 56 Synopsis: 57 PetscTimeSubtract(PetscLogDouble v) 58 59 Not Collective 60 61 Input Parameter: 62 . v - time counter 63 64 Output Parameter: 65 . v - time counter (v = v - current time) 66 67 68 Notes: 69 Since the PETSc libraries incorporate timing of phases and operations, 70 PetscTimeSubtract() is intended only for timing of application codes. 71 The options database commands -log, -log_summary, and -log_all activate 72 PETSc library timing. See the <A href="../../docs/manual.pdf">Users Manual</A> for more details. 73 74 .seealso: PetscTime(), PetscTimeAdd() 75 76 .keywords: Petsc, time, subtract 77 */ 78 79 /* 80 PetscTimeAdd - Adds the current time of day (in seconds) to the value v. 81 82 Synopsis: 83 PetscTimeAdd(PetscLogDouble v) 84 85 Not Collective 86 87 Input Parameter: 88 . v - time counter 89 90 Output Parameter: 91 . v - time counter (v = v + current time) 92 93 Notes: 94 Since the PETSc libraries incorporate timing of phases and operations, 95 PetscTimeAdd() is intended only for timing of application codes. 96 The options database commands -log, -log_summary, and -log_all activate 97 PETSc library timing. See the <A href="../../docs/manual.pdf">Users Manual</A> for more details. 98 99 .seealso: PetscTime(), PetscTimeSubtract() 100 101 .keywords: Petsc, time, add 102 */ 103 104 /* ------------------------------------------------------------------ 105 Some machines have very fast MPI_Wtime() 106 */ 107 #if (defined(PETSC_HAVE_FAST_MPI_WTIME) && !defined(__MPIUNI_H)) 108 #define PetscTime(v) (v)=MPI_Wtime(); 109 110 #define PetscTimeSubtract(v) (v)-=MPI_Wtime(); 111 112 #define PetscTimeAdd(v) (v)+=MPI_Wtime(); 113 114 /* ------------------------------------------------------------------ 115 Power1,2,3,PC machines have a fast clock read_real_time() 116 */ 117 #elif defined(PETSC_USE_READ_REAL_TIME) 118 PETSC_EXTERN PetscLogDouble rs6000_time(void); 119 #define PetscTime(v) (v)=rs6000_time(); 120 121 #define PetscTimeSubtract(v) (v)-=rs6000_time(); 122 123 #define PetscTimeAdd(v) (v)+=rs6000_time(); 124 125 /* ------------------------------------------------------------------ 126 Dec Alpha has a very fast system clock accessible through getclock() 127 getclock() doesn't seem to have a prototype for C++ 128 */ 129 #elif defined(PETSC_USE_GETCLOCK) 130 EXTERN_C_BEGIN 131 extern int getclock(int clock_type,struct timespec *tp); 132 EXTERN_C_END 133 134 135 #define PetscTime(v) {static struct timespec _tp; \ 136 getclock(TIMEOFDAY,&_tp); \ 137 (v)=((PetscLogDouble)_tp.tv_sec)+(1.0e-9)*(_tp.tv_nsec);} 138 139 #define PetscTimeSubtract(v) {static struct timespec _tp; \ 140 getclock(TIMEOFDAY,&_tp); \ 141 (v)-=((PetscLogDouble)_tp.tv_sec)+(1.0e-9)*(_tp.tv_nsec);} 142 143 #define PetscTimeAdd(v) {static struct timespec _tp; \ 144 getclock(TIMEOFDAY,&_tp); \ 145 (v)+=((PetscLogDouble)_tp.tv_sec)+(1.0e-9)*(_tp.tv_nsec);} 146 147 /* ------------------------------------------------------------------ 148 ASCI RED machine has a fast clock accessiable through dclock() 149 */ 150 #elif defined (PETSC_USE_DCLOCK) 151 EXTERN_C_BEGIN 152 PETSC_EXTERN PetscLogDouble dclock(); 153 EXTERN_C_END 154 155 #define PetscTime(v) (v)=dclock(); 156 157 #define PetscTimeSubtract(v) (v)-=dclock(); 158 159 #define PetscTimeAdd(v) (v)+=dclock(); 160 161 162 /* ------------------------------------------------------------------ 163 Windows uses a special time code 164 */ 165 #elif defined (PETSC_USE_NT_TIME) 166 #include <time.h> 167 EXTERN_C_BEGIN 168 PETSC_EXTERN PetscLogDouble nt_time(void); 169 EXTERN_C_END 170 #define PetscTime(v) (v)=nt_time(); 171 172 #define PetscTimeSubtract(v) (v)-=nt_time(); 173 174 #define PetscTimeAdd(v) (v)+=nt_time(); 175 176 /* ------------------------------------------------------------------ 177 The usual Unix time routines. 178 */ 179 #else 180 #define PetscTime(v) do { \ 181 static struct timeval _tp; \ 182 gettimeofday(&_tp,(struct timezone *)0); \ 183 (v)=((PetscLogDouble)_tp.tv_sec)+(1.0e-6)*(_tp.tv_usec); \ 184 } while (0) 185 186 #define PetscTimeSubtract(v) do { \ 187 static struct timeval _tp; \ 188 gettimeofday(&_tp,(struct timezone *)0); \ 189 (v)-=((PetscLogDouble)_tp.tv_sec)+(1.0e-6)*(_tp.tv_usec); \ 190 } while (0) 191 192 #define PetscTimeAdd(v) do { \ 193 static struct timeval _tp; \ 194 gettimeofday(&_tp,(struct timezone *)0); \ 195 (v)+=((PetscLogDouble)_tp.tv_sec)+(1.0e-6)*(_tp.tv_usec); \ 196 } while (0) 197 #endif 198 199 #endif 200 201 202 203 204 205