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Diffstat (limited to 'examples/datavis3d/spectrum/3rdparty/fftreal/stopwatch/ClockCycleCounter.cpp')
| -rw-r--r-- | examples/datavis3d/spectrum/3rdparty/fftreal/stopwatch/ClockCycleCounter.cpp | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/examples/datavis3d/spectrum/3rdparty/fftreal/stopwatch/ClockCycleCounter.cpp b/examples/datavis3d/spectrum/3rdparty/fftreal/stopwatch/ClockCycleCounter.cpp deleted file mode 100644 index fe1d4245..00000000 --- a/examples/datavis3d/spectrum/3rdparty/fftreal/stopwatch/ClockCycleCounter.cpp +++ /dev/null @@ -1,285 +0,0 @@ -/***************************************************************************** - - ClockCycleCounter.cpp - Copyright (c) 2003 Laurent de Soras - ---- Legal stuff --- - -This library is free software; you can redistribute it and/or -modify it under the terms of the GNU Lesser General Public -License as published by the Free Software Foundation; either -version 2.1 of the License, or (at your option) any later version. - -This library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Lesser General Public License for more details. - -You should have received a copy of the GNU Lesser General Public -License along with this library; if not, write to the Free Software -Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -*Tab=3***********************************************************************/ - - - -#if defined (_MSC_VER) - #pragma warning (1 : 4130) // "'operator' : logical operation on address of string constant" - #pragma warning (1 : 4223) // "nonstandard extension used : non-lvalue array converted to pointer" - #pragma warning (1 : 4705) // "statement has no effect" - #pragma warning (1 : 4706) // "assignment within conditional expression" - #pragma warning (4 : 4786) // "identifier was truncated to '255' characters in the debug information" - #pragma warning (4 : 4800) // "forcing value to bool 'true' or 'false' (performance warning)" - #pragma warning (4 : 4355) // "'this' : used in base member initializer list" -#endif - - - -/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ - -#include "ClockCycleCounter.h" - -#include <cassert> - - - -namespace stopwatch -{ - - - -/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ - - - -/* -============================================================================== -Name: ctor -Description: - The first object constructed initialise global data. This first - construction may be a bit slow. -Throws: Nothing -============================================================================== -*/ - -ClockCycleCounter::ClockCycleCounter () -: _start_time (0) -, _state (0) -, _best_score (-1) -{ - if (! _init_flag) - { - // Should be executed in this order - compute_clk_mul (); - compute_measure_time_total (); - compute_measure_time_lap (); - - // Restores object state - _start_time = 0; - _state = 0; - _best_score = -1; - - _init_flag = true; - } -} - - - -/* -============================================================================== -Name: get_time_total -Description: - Gives the time elapsed between the latest stop_lap() and start() calls. -Returns: - The duration, in clock cycles. -Throws: Nothing -============================================================================== -*/ - -Int64 ClockCycleCounter::get_time_total () const -{ - const Int64 duration = _state - _start_time; - assert (duration >= 0); - - const Int64 t = max ( - duration - _measure_time_total, - static_cast <Int64> (0) - ); - - return (t * _clk_mul); -} - - - -/* -============================================================================== -Name: get_time_best_lap -Description: - Gives the smallest time between two consecutive stop_lap() or between - the stop_lap() and start(). The value is reset by a call to start(). - Call this function only after a stop_lap(). - The time is amputed from the duration of the stop_lap() call itself. -Returns: - The smallest duration, in clock cycles. -Throws: Nothing -============================================================================== -*/ - -Int64 ClockCycleCounter::get_time_best_lap () const -{ - assert (_best_score >= 0); - - const Int64 t1 = max ( - _best_score - _measure_time_lap, - static_cast <Int64> (0) - ); - const Int64 t = min (t1, get_time_total ()); - - return (t * _clk_mul); -} - - - -/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ - - - -/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ - - - -#if defined (__MACOS__) - -static inline double stopwatch_ClockCycleCounter_get_time_s () -{ - const Nanoseconds ns = AbsoluteToNanoseconds (UpTime ()); - - return (ns.hi * 4294967296e-9 + ns.lo * 1e-9); -} - -#endif // __MACOS__ - - - -/* -============================================================================== -Name: compute_clk_mul -Description: - This function, only for PowerPC/MacOS computers, computes the multiplier - required to deduce clock cycles from the internal counter. -Throws: Nothing -============================================================================== -*/ - -void ClockCycleCounter::compute_clk_mul () -{ - assert (! _init_flag); - -#if defined (__MACOS__) - - long clk_speed_mhz = CurrentProcessorSpeed (); - const Int64 clk_speed = - static_cast <Int64> (clk_speed_mhz) * (1000L*1000L); - - const double start_time_s = stopwatch_ClockCycleCounter_get_time_s (); - start (); - - const double duration = 0.01; // Seconds - while (stopwatch_ClockCycleCounter_get_time_s () - start_time_s < duration) - { - continue; - } - - const double stop_time_s = stopwatch_ClockCycleCounter_get_time_s (); - stop (); - - const double diff_time_s = stop_time_s - start_time_s; - const double nbr_cycles = diff_time_s * static_cast <double> (clk_speed); - - const Int64 diff_time_c = _state - _start_time; - const double clk_mul = nbr_cycles / static_cast <double> (diff_time_c); - - _clk_mul = round_int (clk_mul); - -#endif // __MACOS__ -} - - - -void ClockCycleCounter::compute_measure_time_total () -{ - start (); - spend_time (); - - Int64 best_result = 0x7FFFFFFFL; // Should be enough - long nbr_tests = 100; - for (long cnt = 0; cnt < nbr_tests; ++cnt) - { - start (); - stop_lap (); - const Int64 duration = _state - _start_time; - best_result = min (best_result, duration); - } - - _measure_time_total = best_result; -} - - - -/* -============================================================================== -Name: compute_measure_time_lap -Description: - Computes the duration of one stop_lap() call and store it. It will be used - later to get the real duration of the measured operation (by substracting - the measurement duration). -Throws: Nothing -============================================================================== -*/ - -void ClockCycleCounter::compute_measure_time_lap () -{ - start (); - spend_time (); - - long nbr_tests = 10; - for (long cnt = 0; cnt < nbr_tests; ++cnt) - { - stop_lap (); - stop_lap (); - stop_lap (); - stop_lap (); - } - - _measure_time_lap = _best_score; -} - - - -void ClockCycleCounter::spend_time () -{ - const Int64 nbr_clocks = 500; // Number of clock cycles to spend - - const Int64 start = read_clock_counter (); - Int64 current; - - do - { - current = read_clock_counter (); - } - while ((current - start) * _clk_mul < nbr_clocks); -} - - - -Int64 ClockCycleCounter::_measure_time_total = 0; -Int64 ClockCycleCounter::_measure_time_lap = 0; -int ClockCycleCounter::_clk_mul = 1; -bool ClockCycleCounter::_init_flag = false; - - -} // namespace stopwatch - - - -/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/ |