pike.git/ src/ builtin_functions.c

2003-02-08

2003-02-08 17:12:27 by Martin Stjernholm <mast@lysator.liu.se>

• f4a9951c46089c35d3a2e018c1b1bbd32dcd9162 (42 lines) (+33/-9) ^{[ Show | Annotate ]}
  Branch: 7.9

Exclude the time spent in the gc from the measurements returned by
gethrvtime.

Rev: src/builtin_functions.c:1.469
Rev: src/gc.c:1.200
Rev: src/gc.h:1.98
Rev: src/threads.c:1.200
Rev: src/threads.h:1.122

2:   || This file is part of Pike. For copyright information see COPYRIGHT.   || Pike is distributed under GPL, LGPL and MPL. See the file COPYING   || for more information. - || $Id: builtin_functions.c,v 1.468 2003/02/04 17:29:19 mast Exp $ + || $Id: builtin_functions.c,v 1.469 2003/02/08 17:12:27 mast Exp $   */      #include "global.h" - RCSID("$Id: builtin_functions.c,v 1.468 2003/02/04 17:29:19 mast Exp $"); + RCSID("$Id: builtin_functions.c,v 1.469 2003/02/08 17:12:27 mast Exp $");   #include "interpret.h"   #include "svalue.h"   #include "pike_macros.h"
5953:      /*! @decl int gethrvtime (void|int nsec)    *! -  *! Return the CPU time that has been consumed by this process. Zero -  *! is returned if the system couldn't determine it. The time is -  *! normally returned in microseconds, but if the optional @[nsec] is -  *! nonzero then it's returned in nanoseconds. +  *! Return the CPU time that has been consumed by this process or +  *! thread. Zero is returned if the system couldn't determine it. The +  *! time is normally returned in microseconds, but if the optional +  *! @[nsec] is nonzero then it's returned in nanoseconds.    *!    *! The CPU time includes both user and system time, i.e. it's    *! approximately the same thing you would get by adding together the    *! "utime" and "stime" fields returned by @[System.getrusage] (but -  *! perhaps with better accurancy). +  *! perhaps with better accurancy). It's however system dependent +  *! whether or not it's the time consumed in all threads or in the +  *! current one only; @[System.CPU_TIME_IS_THREAD_LOCAL] tells which.    *!    *! @note    *! The actual accurancy on many systems is significantly less than    *! milliseconds or nanoseconds.    *! -  +  *! @note +  *! The garbage collector might run automatically at any time. The +  *! time it takes is not included in the figure returned by this +  *! function, so that normal measurements isn't randomly clobbered +  *! by it. Explicit calls to @[gc] are still included, though. +  *! +  *! @note +  *! The special function @[gauge] is implemented with this function. +  *!    *! @seealso -  +  *! @[System.CPU_TIME_IS_THREAD_LOCAL], @[gauge],    *! @[System.getrusage()], @[gethrtime()]    */   PMOD_EXPORT void f_gethrvtime(INT32 args)   { -  +  cpu_time_t time = get_cpu_time(); +  +  /* Don't subtract the gc time at all if we don't know whether it's +  * thread local or not, since if we do it wrong we might end up +  * returning a negative number. */ + #if CPU_TIME_IS_THREAD_LOCAL == YES +  time -= OBJ2THREAD(Pike_interpreter.thread_id)->auto_gc_time; + #elif CPU_TIME_IS_THREAD_LOCAL == NO +  time -= auto_gc_time; + #endif +     pop_n_elems(args);    if (args) -  push_int64(get_cpu_time()); +  push_int64(time);    else -  push_int64(get_cpu_time()/1000); +  push_int64(time/1000);   }      /*! @decl int gethrtime (void|int nsec)