515 lines
14 KiB
C
515 lines
14 KiB
C
/*
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* Copyright (c) 2003, 2007-8 Matteo Frigo
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* Copyright (c) 2003, 2007-8 Massachusetts Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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/* machine-dependent cycle counters code. Needs to be inlined. */
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/***************************************************************************/
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/* To use the cycle counters in your code, simply #include "cycle.h" (this
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file), and then use the functions/macros:
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ticks getticks(void);
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ticks is an opaque typedef defined below, representing the current time.
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You extract the elapsed time between two calls to gettick() via:
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double elapsed(ticks t1, ticks t0);
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which returns a double-precision variable in arbitrary units. You
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are not expected to convert this into human units like seconds; it
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is intended only for *comparisons* of time intervals.
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(In order to use some of the OS-dependent timer routines like
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Solaris' gethrtime, you need to paste the autoconf snippet below
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into your configure.ac file and #include "config.h" before cycle.h,
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or define the relevant macros manually if you are not using autoconf.)
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*/
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/***************************************************************************/
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/* This file uses macros like HAVE_GETHRTIME that are assumed to be
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defined according to whether the corresponding function/type/header
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is available on your system. The necessary macros are most
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conveniently defined if you are using GNU autoconf, via the tests:
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dnl ---------------------------------------------------------------------
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AC_C_INLINE
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AC_HEADER_TIME
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AC_CHECK_HEADERS([sys/time.h c_asm.h intrinsics.h mach/mach_time.h])
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AC_CHECK_TYPE([hrtime_t],[AC_DEFINE(HAVE_HRTIME_T, 1, [Define to 1 if hrtime_t is defined in <sys/time.h>])],,[#if HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif])
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AC_CHECK_FUNCS([gethrtime read_real_time time_base_to_time clock_gettime mach_absolute_time])
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dnl Cray UNICOS _rtc() (real-time clock) intrinsic
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AC_MSG_CHECKING([for _rtc intrinsic])
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rtc_ok=yes
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AC_TRY_LINK([#ifdef HAVE_INTRINSICS_H
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#include <intrinsics.h>
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#endif], [_rtc()], [AC_DEFINE(HAVE__RTC,1,[Define if you have the UNICOS _rtc() intrinsic.])], [rtc_ok=no])
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AC_MSG_RESULT($rtc_ok)
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dnl ---------------------------------------------------------------------
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*/
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/***************************************************************************/
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#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#define INLINE_ELAPSED(INL) static INL double elapsed(ticks t1, ticks t0) \
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{ \
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return (double)t1 - (double)t0; \
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}
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/*----------------------------------------------------------------*/
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/* Solaris */
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#if defined(HAVE_GETHRTIME) && defined(HAVE_HRTIME_T) && !defined(HAVE_TICK_COUNTER)
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typedef hrtime_t ticks;
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#define getticks gethrtime
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INLINE_ELAPSED(inline)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/* AIX v. 4+ routines to read the real-time clock or time-base register */
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#if defined(HAVE_READ_REAL_TIME) && defined(HAVE_TIME_BASE_TO_TIME) && !defined(HAVE_TICK_COUNTER)
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typedef timebasestruct_t ticks;
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static __inline ticks getticks(void)
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{
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ticks t;
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read_real_time(&t, TIMEBASE_SZ);
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return t;
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}
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static __inline double elapsed(ticks t1, ticks t0) /* time in nanoseconds */
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{
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time_base_to_time(&t1, TIMEBASE_SZ);
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time_base_to_time(&t0, TIMEBASE_SZ);
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return (((double)t1.tb_high - (double)t0.tb_high) * 1.0e9 +
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((double)t1.tb_low - (double)t0.tb_low));
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}
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/*
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* PowerPC ``cycle'' counter using the time base register.
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*/
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#if ((((defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))) || (defined(__MWERKS__) && defined(macintosh)))) || (defined(__IBM_GCC_ASM) && (defined(__powerpc__) || defined(__ppc__)))) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long long ticks;
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static __inline__ ticks getticks(void)
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{
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unsigned int tbl, tbu0, tbu1;
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do {
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__asm__ __volatile__ ("mftbu %0" : "=r"(tbu0));
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__asm__ __volatile__ ("mftb %0" : "=r"(tbl));
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__asm__ __volatile__ ("mftbu %0" : "=r"(tbu1));
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} while (tbu0 != tbu1);
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return (((unsigned long long)tbu0) << 32) | tbl;
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/* MacOS/Mach (Darwin) time-base register interface (unlike UpTime,
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from Carbon, requires no additional libraries to be linked). */
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#if defined(HAVE_MACH_ABSOLUTE_TIME) && defined(HAVE_MACH_MACH_TIME_H) && !defined(HAVE_TICK_COUNTER)
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#include <mach/mach_time.h>
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typedef uint64_t ticks;
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#define getticks mach_absolute_time
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/*
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* Pentium cycle counter
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*/
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#if (defined(__GNUC__) || defined(__ICC)) && defined(__i386__) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long long ticks;
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static __inline__ ticks getticks(void)
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{
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ticks ret;
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__asm__ __volatile__("rdtsc": "=A" (ret));
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/* no input, nothing else clobbered */
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return ret;
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#define TIME_MIN 5000.0 /* unreliable pentium IV cycle counter */
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#endif
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/* Visual C++ -- thanks to Morten Nissov for his help with this */
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#if _MSC_VER >= 1200 && _M_IX86 >= 500 && !defined(HAVE_TICK_COUNTER)
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#include <windows.h>
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typedef LARGE_INTEGER ticks;
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#define RDTSC __asm __emit 0fh __asm __emit 031h /* hack for VC++ 5.0 */
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static __inline ticks getticks(void)
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{
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ticks retval;
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__asm {
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RDTSC
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mov retval.HighPart, edx
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mov retval.LowPart, eax
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}
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return retval;
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}
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static __inline double elapsed(ticks t1, ticks t0)
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{
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return (double)t1.QuadPart - (double)t0.QuadPart;
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}
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#define HAVE_TICK_COUNTER
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#define TIME_MIN 5000.0 /* unreliable pentium IV cycle counter */
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#endif
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/*----------------------------------------------------------------*/
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/*
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* X86-64 cycle counter
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*/
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#if (defined(__GNUC__) || defined(__ICC) || defined(__SUNPRO_C)) && defined(__x86_64__) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long long ticks;
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static __inline__ ticks getticks(void)
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{
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unsigned a, d;
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asm volatile("rdtsc" : "=a" (a), "=d" (d));
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return ((ticks)a) | (((ticks)d) << 32);
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/* PGI compiler, courtesy Cristiano Calonaci, Andrea Tarsi, & Roberto Gori.
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NOTE: this code will fail to link unless you use the -Masmkeyword compiler
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option (grrr). */
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#if defined(__PGI) && defined(__x86_64__) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long long ticks;
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static ticks getticks(void)
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{
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asm(" rdtsc; shl $0x20,%rdx; mov %eax,%eax; or %rdx,%rax; ");
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/* Visual C++, courtesy of Dirk Michaelis */
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#if _MSC_VER >= 1400 && (defined(_M_AMD64) || defined(_M_X64)) && !defined(HAVE_TICK_COUNTER)
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#include <intrin.h>
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#pragma intrinsic(__rdtsc)
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typedef unsigned __int64 ticks;
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#define getticks __rdtsc
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INLINE_ELAPSED(__inline)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/*
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* IA64 cycle counter
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*/
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/* intel's icc/ecc compiler */
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#if (defined(__EDG_VERSION) || defined(__ECC)) && defined(__ia64__) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long ticks;
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#include <ia64intrin.h>
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static __inline__ ticks getticks(void)
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{
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return __getReg(_IA64_REG_AR_ITC);
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/* gcc */
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#if defined(__GNUC__) && defined(__ia64__) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long ticks;
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static __inline__ ticks getticks(void)
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{
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ticks ret;
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__asm__ __volatile__ ("mov %0=ar.itc" : "=r"(ret));
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return ret;
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/* HP/UX IA64 compiler, courtesy Teresa L. Johnson: */
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#if defined(__hpux) && defined(__ia64) && !defined(HAVE_TICK_COUNTER)
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#include <machine/sys/inline.h>
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typedef unsigned long ticks;
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static inline ticks getticks(void)
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{
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ticks ret;
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ret = _Asm_mov_from_ar (_AREG_ITC);
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return ret;
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}
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INLINE_ELAPSED(inline)
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#define HAVE_TICK_COUNTER
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#endif
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/* Microsoft Visual C++ */
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#if defined(_MSC_VER) && defined(_M_IA64) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned __int64 ticks;
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# ifdef __cplusplus
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extern "C"
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# endif
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ticks __getReg(int whichReg);
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#pragma intrinsic(__getReg)
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static __inline ticks getticks(void)
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{
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volatile ticks temp;
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temp = __getReg(3116);
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return temp;
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}
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INLINE_ELAPSED(inline)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/*
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* PA-RISC cycle counter
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*/
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#if defined(__hppa__) || defined(__hppa) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long ticks;
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# ifdef __GNUC__
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static __inline__ ticks getticks(void)
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{
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ticks ret;
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__asm__ __volatile__("mfctl 16, %0": "=r" (ret));
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/* no input, nothing else clobbered */
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return ret;
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}
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# else
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# include <machine/inline.h>
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static inline unsigned long getticks(void)
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{
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register ticks ret;
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_MFCTL(16, ret);
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return ret;
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}
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# endif
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INLINE_ELAPSED(inline)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/* S390, courtesy of James Treacy */
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#if defined(__GNUC__) && defined(__s390__) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long long ticks;
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static __inline__ ticks getticks(void)
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{
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ticks cycles;
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__asm__("stck 0(%0)" : : "a" (&(cycles)) : "memory", "cc");
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return cycles;
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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#if defined(__GNUC__) && defined(__alpha__) && !defined(HAVE_TICK_COUNTER)
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/*
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* The 32-bit cycle counter on alpha overflows pretty quickly,
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* unfortunately. A 1GHz machine overflows in 4 seconds.
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*/
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typedef unsigned int ticks;
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static __inline__ ticks getticks(void)
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{
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unsigned long cc;
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__asm__ __volatile__ ("rpcc %0" : "=r"(cc));
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return (cc & 0xFFFFFFFF);
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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#if defined(__GNUC__) && defined(__sparc_v9__) && !defined(HAVE_TICK_COUNTER)
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typedef unsigned long ticks;
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static __inline__ ticks getticks(void)
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{
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ticks ret;
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__asm__ __volatile__("rd %%tick, %0" : "=r" (ret));
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return ret;
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}
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INLINE_ELAPSED(__inline__)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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#if (defined(__DECC) || defined(__DECCXX)) && defined(__alpha) && defined(HAVE_C_ASM_H) && !defined(HAVE_TICK_COUNTER)
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# include <c_asm.h>
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typedef unsigned int ticks;
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static __inline ticks getticks(void)
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{
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unsigned long cc;
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cc = asm("rpcc %v0");
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return (cc & 0xFFFFFFFF);
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}
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INLINE_ELAPSED(__inline)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/* SGI/Irix */
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#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_SGI_CYCLE) && !defined(HAVE_TICK_COUNTER)
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typedef struct timespec ticks;
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static inline ticks getticks(void)
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{
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struct timespec t;
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clock_gettime(CLOCK_SGI_CYCLE, &t);
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return t;
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}
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static inline double elapsed(ticks t1, ticks t0)
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{
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return ((double)t1.tv_sec - (double)t0.tv_sec) * 1.0E9 +
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((double)t1.tv_nsec - (double)t0.tv_nsec);
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}
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/* Cray UNICOS _rtc() intrinsic function */
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#if defined(HAVE__RTC) && !defined(HAVE_TICK_COUNTER)
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#ifdef HAVE_INTRINSICS_H
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# include <intrinsics.h>
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#endif
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typedef long long ticks;
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#define getticks _rtc
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INLINE_ELAPSED(inline)
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#define HAVE_TICK_COUNTER
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#endif
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/*----------------------------------------------------------------*/
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/* MIPS ZBus */
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#if HAVE_MIPS_ZBUS_TIMER
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#if defined(__mips__) && !defined(HAVE_TICK_COUNTER)
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#include <sys/mman.h>
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#include <unistd.h>
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#include <fcntl.h>
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typedef uint64_t ticks;
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static inline ticks getticks(void)
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{
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static uint64_t* addr = 0;
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if (addr == 0)
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{
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uint32_t rq_addr = 0x10030000;
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int fd;
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int pgsize;
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pgsize = getpagesize();
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fd = open ("/dev/mem", O_RDONLY | O_SYNC, 0);
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if (fd < 0) {
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perror("open");
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return NULL;
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}
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addr = mmap(0, pgsize, PROT_READ, MAP_SHARED, fd, rq_addr);
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close(fd);
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if (addr == (uint64_t *)-1) {
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perror("mmap");
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return NULL;
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}
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}
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return *addr;
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}
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INLINE_ELAPSED(inline)
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#define HAVE_TICK_COUNTER
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#endif
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#endif /* HAVE_MIPS_ZBUS_TIMER */
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