author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 16:46:38 +0300 | |
changeset 18 | 47c74d1534e1 |
permissions | -rw-r--r-- |
18
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/* |
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* LIBOIL - Library of Optimized Inner Loops |
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* Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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//Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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|
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#ifdef HAVE_CONFIG_H |
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#include <config.h> |
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#endif |
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|
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#include <liboil/liboilprofile.h> |
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#include <liboil/liboildebug.h> |
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|
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#ifdef HAVE_SYS_TIME_H |
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#include <sys/time.h> |
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#endif |
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#include <time.h> |
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#include <string.h> |
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#include <math.h> |
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|
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#ifdef __SYMBIAN32__ |
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#ifdef __ARMCC__ |
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#pragma diag_remark 68 |
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#endif//__ARMCC__ |
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#endif//__SYMBIAN32__ |
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|
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/** |
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* SECTION:liboilprofile |
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* @title:OilProfile |
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* @short_description: |
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* Measuring the length of time needed to execute Liboil functions. |
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* |
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*/ |
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|
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/** |
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* oil_profile_init: |
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* @prof: the OilProfile structure |
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* |
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* Initializes a profiling structure. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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void |
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oil_profile_init (OilProfile *prof) |
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{ |
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memset(prof, 0, sizeof(OilProfile)); |
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|
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prof->min = -1; |
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|
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} |
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|
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/** |
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* oil_profile_stop_handle: |
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* @prof: the OilProfile structure |
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* |
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* Handles post-processing of a single profiling run. |
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* |
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* FIXME: need more info |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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void |
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oil_profile_stop_handle (OilProfile *prof) |
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{ |
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int i; |
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|
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prof->last = prof->stop - prof->start; |
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|
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prof->total += prof->last; |
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prof->n++; |
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|
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if (prof->last < prof->min) prof->min = prof->last; |
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|
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for(i=0;i<prof->hist_n;i++) { |
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if (prof->last == prof->hist_time[i]) { |
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prof->hist_count[i]++; |
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break; |
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} |
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} |
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if (i == prof->hist_n && prof->hist_n < OIL_PROFILE_HIST_LENGTH) { |
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prof->hist_time[prof->hist_n] = prof->last; |
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prof->hist_count[prof->hist_n] = 1; |
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prof->hist_n++; |
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} |
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} |
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|
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/** |
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* oil_profile_get_ave_std: |
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* @prof: the OilProfile structure |
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* @ave_p: pointer to average |
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* @std_p: pointer to standard deviation |
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* |
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* Calculates the average and standard deviation of a number of |
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* profiling runs, and places the results in the locations |
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* provided by @ave_p and @std_p. Either @ave_p and @std_p may |
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* be NULL, in which case the values will not be written. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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void |
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oil_profile_get_ave_std (OilProfile *prof, double *ave_p, double *std_p) |
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{ |
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double ave; |
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double std; |
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int max_i; |
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double off; |
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double s; |
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double s2; |
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int i; |
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int n; |
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double x; |
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|
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do { |
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s = s2 = 0; |
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n = 0; |
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max_i = -1; |
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for(i=0;i<10;i++){ |
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x = prof->hist_time[i]; |
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s2 += x * x * prof->hist_count[i]; |
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s += x * prof->hist_count[i]; |
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n += prof->hist_count[i]; |
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if (prof->hist_count[i] > 0) { |
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if (max_i == -1 || prof->hist_time[i] > prof->hist_time[max_i]) { |
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max_i = i; |
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} |
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} |
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} |
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|
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ave = s / n; |
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std = sqrt (s2 - s * s / n + n*n) / (n-1); |
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off = (prof->hist_time[max_i] - ave)/std; |
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|
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if (off > 4.0) { |
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prof->hist_count[max_i] = 0; |
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} |
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} while (off > 4.0); |
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|
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if (ave_p) *ave_p = ave; |
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if (std_p) *std_p = std; |
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} |
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|
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unsigned long (*_oil_profile_stamp)(void); |
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|
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/** |
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* oil_profile_stamp: |
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* |
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* Creates a timestamp based on a CPU-specific high-frequency |
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* counter, if available. |
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* |
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* Returns: a timestamp |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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unsigned long |
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oil_profile_stamp (void) |
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{ |
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return _oil_profile_stamp(); |
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} |
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185 |