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| <h1>partitioner.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
| <a name="l00002"></a>00002 <span class="comment"> Copyright 2005-2010 Intel Corporation. All Rights Reserved.</span> |
| <a name="l00003"></a>00003 <span class="comment"></span> |
| <a name="l00004"></a>00004 <span class="comment"> The source code contained or described herein and all documents related</span> |
| <a name="l00005"></a>00005 <span class="comment"> to the source code ("Material") are owned by Intel Corporation or its</span> |
| <a name="l00006"></a>00006 <span class="comment"> suppliers or licensors. Title to the Material remains with Intel</span> |
| <a name="l00007"></a>00007 <span class="comment"> Corporation or its suppliers and licensors. The Material is protected</span> |
| <a name="l00008"></a>00008 <span class="comment"> by worldwide copyright laws and treaty provisions. No part of the</span> |
| <a name="l00009"></a>00009 <span class="comment"> Material may be used, copied, reproduced, modified, published, uploaded,</span> |
| <a name="l00010"></a>00010 <span class="comment"> posted, transmitted, distributed, or disclosed in any way without</span> |
| <a name="l00011"></a>00011 <span class="comment"> Intel's prior express written permission.</span> |
| <a name="l00012"></a>00012 <span class="comment"></span> |
| <a name="l00013"></a>00013 <span class="comment"> No license under any patent, copyright, trade secret or other</span> |
| <a name="l00014"></a>00014 <span class="comment"> intellectual property right is granted to or conferred upon you by</span> |
| <a name="l00015"></a>00015 <span class="comment"> disclosure or delivery of the Materials, either expressly, by</span> |
| <a name="l00016"></a>00016 <span class="comment"> implication, inducement, estoppel or otherwise. Any license under such</span> |
| <a name="l00017"></a>00017 <span class="comment"> intellectual property rights must be express and approved by Intel in</span> |
| <a name="l00018"></a>00018 <span class="comment"> writing.</span> |
| <a name="l00019"></a>00019 <span class="comment">*/</span> |
| <a name="l00020"></a>00020 |
| <a name="l00021"></a>00021 <span class="preprocessor">#ifndef __TBB_partitioner_H</span> |
| <a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define __TBB_partitioner_H</span> |
| <a name="l00023"></a>00023 <span class="preprocessor"></span> |
| <a name="l00024"></a>00024 <span class="preprocessor">#include "task.h"</span> |
| <a name="l00025"></a>00025 |
| <a name="l00026"></a>00026 <span class="keyword">namespace </span>tbb { |
| <a name="l00027"></a>00027 <span class="keyword">class </span>affinity_partitioner; |
| <a name="l00028"></a>00028 |
| <a name="l00030"></a>00030 <span class="keyword">namespace </span>internal { |
| <a name="l00031"></a>00031 size_t __TBB_EXPORTED_FUNC get_initial_auto_partitioner_divisor(); |
| <a name="l00032"></a>00032 |
| <a name="l00034"></a>00034 |
| <a name="l00035"></a>00035 <span class="keyword">class </span>affinity_partitioner_base_v3: no_copy { |
| <a name="l00036"></a>00036 <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a00141.html">tbb::affinity_partitioner</a>; |
| <a name="l00038"></a>00038 |
| <a name="l00039"></a>00039 affinity_id* my_array; |
| <a name="l00041"></a>00041 size_t my_size; |
| <a name="l00043"></a>00043 affinity_partitioner_base_v3() : my_array(NULL), my_size(0) {} |
| <a name="l00045"></a>00045 ~affinity_partitioner_base_v3() {resize(0);} |
| <a name="l00047"></a>00047 |
| <a name="l00048"></a>00048 <span class="keywordtype">void</span> __TBB_EXPORTED_METHOD resize( <span class="keywordtype">unsigned</span> factor ); |
| <a name="l00049"></a>00049 <span class="keyword">friend</span> <span class="keyword">class </span>affinity_partition_type; |
| <a name="l00050"></a>00050 }; |
| <a name="l00051"></a>00051 |
| <a name="l00053"></a>00053 <span class="keyword">class </span>partition_type_base { |
| <a name="l00054"></a>00054 <span class="keyword">public</span>: |
| <a name="l00055"></a>00055 <span class="keywordtype">void</span> set_affinity( task & ) {} |
| <a name="l00056"></a>00056 <span class="keywordtype">void</span> note_affinity( <a class="code" href="a00199.html#d61bb32389d3857bf7511d69beaafb76">task::affinity_id</a> ) {} |
| <a name="l00057"></a>00057 task* continue_after_execute_range() {<span class="keywordflow">return</span> NULL;} |
| <a name="l00058"></a>00058 <span class="keywordtype">bool</span> decide_whether_to_delay() {<span class="keywordflow">return</span> <span class="keyword">false</span>;} |
| <a name="l00059"></a>00059 <span class="keywordtype">void</span> spawn_or_delay( <span class="keywordtype">bool</span>, task& b ) { |
| <a name="l00060"></a>00060 task::spawn(b); |
| <a name="l00061"></a>00061 } |
| <a name="l00062"></a>00062 }; |
| <a name="l00063"></a>00063 |
| <a name="l00064"></a>00064 <span class="keyword">class </span>affinity_partition_type; |
| <a name="l00065"></a>00065 |
| <a name="l00066"></a>00066 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">class </span>start_for; |
| <a name="l00067"></a>00067 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">class </span>start_reduce; |
| <a name="l00068"></a>00068 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> <span class="keyword">class </span>start_reduce_with_affinity; |
| <a name="l00069"></a>00069 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">class </span>start_scan; |
| <a name="l00070"></a>00070 |
| <a name="l00071"></a>00071 } <span class="comment">// namespace internal</span> |
| <a name="l00073"></a>00073 <span class="comment"></span> |
| <a name="l00075"></a>00075 |
| <a name="l00077"></a><a class="code" href="a00193.html">00077</a> <span class="keyword">class </span><a class="code" href="a00193.html">simple_partitioner</a> { |
| <a name="l00078"></a>00078 <span class="keyword">public</span>: |
| <a name="l00079"></a>00079 <a class="code" href="a00193.html">simple_partitioner</a>() {} |
| <a name="l00080"></a>00080 <span class="keyword">private</span>: |
| <a name="l00081"></a>00081 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_for; |
| <a name="l00082"></a>00082 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_reduce; |
| <a name="l00083"></a>00083 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_scan; |
| <a name="l00084"></a>00084 |
| <a name="l00085"></a>00085 <span class="keyword">class </span>partition_type: <span class="keyword">public</span> internal::partition_type_base { |
| <a name="l00086"></a>00086 <span class="keyword">public</span>: |
| <a name="l00087"></a>00087 <span class="keywordtype">bool</span> should_execute_range(<span class="keyword">const</span> <a class="code" href="a00199.html">task</a>& ) {<span class="keywordflow">return</span> <span class="keyword">false</span>;} |
| <a name="l00088"></a>00088 partition_type( <span class="keyword">const</span> <a class="code" href="a00193.html">simple_partitioner</a>& ) {} |
| <a name="l00089"></a>00089 partition_type( <span class="keyword">const</span> partition_type&, <a class="code" href="a00198.html">split</a> ) {} |
| <a name="l00090"></a>00090 }; |
| <a name="l00091"></a>00091 }; |
| <a name="l00092"></a>00092 |
| <a name="l00094"></a>00094 |
| <a name="l00097"></a><a class="code" href="a00146.html">00097</a> <span class="keyword">class </span><a class="code" href="a00146.html">auto_partitioner</a> { |
| <a name="l00098"></a>00098 <span class="keyword">public</span>: |
| <a name="l00099"></a>00099 <a class="code" href="a00146.html">auto_partitioner</a>() {} |
| <a name="l00100"></a>00100 |
| <a name="l00101"></a>00101 <span class="keyword">private</span>: |
| <a name="l00102"></a>00102 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_for; |
| <a name="l00103"></a>00103 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_reduce; |
| <a name="l00104"></a>00104 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_scan; |
| <a name="l00105"></a>00105 |
| <a name="l00106"></a>00106 <span class="keyword">class </span>partition_type: <span class="keyword">public</span> internal::partition_type_base { |
| <a name="l00107"></a>00107 size_t num_chunks; |
| <a name="l00108"></a>00108 <span class="keyword">static</span> <span class="keyword">const</span> size_t VICTIM_CHUNKS = 4; |
| <a name="l00109"></a>00109 <span class="keyword">public</span>: |
| <a name="l00110"></a>00110 <span class="keywordtype">bool</span> should_execute_range(<span class="keyword">const</span> <a class="code" href="a00199.html">task</a> &t) { |
| <a name="l00111"></a>00111 <span class="keywordflow">if</span>( num_chunks<VICTIM_CHUNKS && t.<a class="code" href="a00199.html#f9169402702f56bf519448aaf34450aa">is_stolen_task</a>() ) |
| <a name="l00112"></a>00112 num_chunks = VICTIM_CHUNKS; |
| <a name="l00113"></a>00113 <span class="keywordflow">return</span> num_chunks==1; |
| <a name="l00114"></a>00114 } |
| <a name="l00115"></a>00115 partition_type( <span class="keyword">const</span> <a class="code" href="a00146.html">auto_partitioner</a>& ) : num_chunks(internal::get_initial_auto_partitioner_divisor()) {} |
| <a name="l00116"></a>00116 partition_type( partition_type& pt, <a class="code" href="a00198.html">split</a> ) { |
| <a name="l00117"></a>00117 num_chunks = pt.num_chunks /= 2u; |
| <a name="l00118"></a>00118 } |
| <a name="l00119"></a>00119 }; |
| <a name="l00120"></a>00120 }; |
| <a name="l00121"></a>00121 |
| <a name="l00123"></a><a class="code" href="a00141.html">00123</a> <span class="keyword">class </span><a class="code" href="a00141.html">affinity_partitioner</a>: internal::affinity_partitioner_base_v3 { |
| <a name="l00124"></a>00124 <span class="keyword">public</span>: |
| <a name="l00125"></a>00125 <a class="code" href="a00141.html">affinity_partitioner</a>() {} |
| <a name="l00126"></a>00126 |
| <a name="l00127"></a>00127 <span class="keyword">private</span>: |
| <a name="l00128"></a>00128 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_for; |
| <a name="l00129"></a>00129 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_reduce; |
| <a name="l00130"></a>00130 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_reduce_with_affinity; |
| <a name="l00131"></a>00131 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> <span class="keyword">friend</span> <span class="keyword">class </span>internal::start_scan; |
| <a name="l00132"></a>00132 |
| <a name="l00133"></a>00133 <span class="keyword">typedef</span> internal::affinity_partition_type partition_type; |
| <a name="l00134"></a>00134 <span class="keyword">friend</span> <span class="keyword">class </span>internal::affinity_partition_type; |
| <a name="l00135"></a>00135 }; |
| <a name="l00136"></a>00136 |
| <a name="l00138"></a>00138 <span class="keyword">namespace </span>internal { |
| <a name="l00139"></a>00139 |
| <a name="l00140"></a>00140 <span class="keyword">class </span>affinity_partition_type: <span class="keyword">public</span> no_copy { |
| <a name="l00142"></a>00142 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> factor = 16; |
| <a name="l00143"></a>00143 <span class="keyword">static</span> <span class="keyword">const</span> size_t VICTIM_CHUNKS = 4; |
| <a name="l00144"></a>00144 |
| <a name="l00145"></a>00145 internal::affinity_id* my_array; |
| <a name="l00146"></a>00146 <a class="code" href="a00202.html">task_list</a> delay_list; |
| <a name="l00147"></a>00147 <span class="keywordtype">unsigned</span> map_begin, map_end; |
| <a name="l00148"></a>00148 size_t num_chunks; |
| <a name="l00149"></a>00149 <span class="keyword">public</span>: |
| <a name="l00150"></a>00150 affinity_partition_type( <a class="code" href="a00141.html">affinity_partitioner</a>& ap ) { |
| <a name="l00151"></a>00151 __TBB_ASSERT( (factor&(factor-1))==0, <span class="stringliteral">"factor must be power of two"</span> ); |
| <a name="l00152"></a>00152 ap.resize(factor); |
| <a name="l00153"></a>00153 my_array = ap.my_array; |
| <a name="l00154"></a>00154 map_begin = 0; |
| <a name="l00155"></a>00155 map_end = unsigned(ap.my_size); |
| <a name="l00156"></a>00156 num_chunks = internal::get_initial_auto_partitioner_divisor(); |
| <a name="l00157"></a>00157 } |
| <a name="l00158"></a>00158 affinity_partition_type(affinity_partition_type& p, split) : my_array(p.my_array) { |
| <a name="l00159"></a>00159 __TBB_ASSERT( p.map_end-p.map_begin<factor || (p.map_end-p.map_begin)%factor==0, NULL ); |
| <a name="l00160"></a>00160 num_chunks = p.num_chunks /= 2; |
| <a name="l00161"></a>00161 <span class="keywordtype">unsigned</span> e = p.map_end; |
| <a name="l00162"></a>00162 <span class="keywordtype">unsigned</span> d = (e - p.map_begin)/2; |
| <a name="l00163"></a>00163 <span class="keywordflow">if</span>( d>factor ) |
| <a name="l00164"></a>00164 d &= 0u-factor; |
| <a name="l00165"></a>00165 map_end = e; |
| <a name="l00166"></a>00166 map_begin = p.map_end = e-d; |
| <a name="l00167"></a>00167 } |
| <a name="l00168"></a>00168 |
| <a name="l00169"></a>00169 <span class="keywordtype">bool</span> should_execute_range(<span class="keyword">const</span> task &t) { |
| <a name="l00170"></a>00170 <span class="keywordflow">if</span>( num_chunks < VICTIM_CHUNKS && t.is_stolen_task() ) |
| <a name="l00171"></a>00171 num_chunks = VICTIM_CHUNKS; |
| <a name="l00172"></a>00172 <span class="keywordflow">return</span> num_chunks == 1; |
| <a name="l00173"></a>00173 } |
| <a name="l00174"></a>00174 |
| <a name="l00175"></a>00175 <span class="keywordtype">void</span> set_affinity( task &t ) { |
| <a name="l00176"></a>00176 <span class="keywordflow">if</span>( map_begin<map_end ) |
| <a name="l00177"></a>00177 t.set_affinity( my_array[map_begin] ); |
| <a name="l00178"></a>00178 } |
| <a name="l00179"></a>00179 <span class="keywordtype">void</span> note_affinity( <a class="code" href="a00199.html#d61bb32389d3857bf7511d69beaafb76">task::affinity_id</a> <span class="keywordtype">id</span> ) { |
| <a name="l00180"></a>00180 <span class="keywordflow">if</span>( map_begin<map_end ) |
| <a name="l00181"></a>00181 my_array[map_begin] = id; |
| <a name="l00182"></a>00182 } |
| <a name="l00183"></a>00183 task* continue_after_execute_range() { |
| <a name="l00184"></a>00184 task* first = NULL; |
| <a name="l00185"></a>00185 <span class="keywordflow">if</span>( !delay_list.empty() ) { |
| <a name="l00186"></a>00186 first = &delay_list.pop_front(); |
| <a name="l00187"></a>00187 <span class="keywordflow">while</span>( !delay_list.empty() ) { |
| <a name="l00188"></a>00188 task::spawn(*first); |
| <a name="l00189"></a>00189 first = &delay_list.pop_front(); |
| <a name="l00190"></a>00190 } |
| <a name="l00191"></a>00191 } |
| <a name="l00192"></a>00192 <span class="keywordflow">return</span> first; |
| <a name="l00193"></a>00193 } |
| <a name="l00194"></a>00194 <span class="keywordtype">bool</span> decide_whether_to_delay() { |
| <a name="l00195"></a>00195 <span class="comment">// The possible underflow caused by "-1u" is deliberate</span> |
| <a name="l00196"></a>00196 <span class="keywordflow">return</span> (map_begin&(factor-1))==0 && map_end-map_begin-1u<factor; |
| <a name="l00197"></a>00197 } |
| <a name="l00198"></a>00198 <span class="keywordtype">void</span> spawn_or_delay( <span class="keywordtype">bool</span> delay, task& b ) { |
| <a name="l00199"></a>00199 <span class="keywordflow">if</span>( delay ) |
| <a name="l00200"></a>00200 delay_list.push_back(b); |
| <a name="l00201"></a>00201 <span class="keywordflow">else</span> |
| <a name="l00202"></a>00202 task::spawn(b); |
| <a name="l00203"></a>00203 } |
| <a name="l00204"></a>00204 |
| <a name="l00205"></a>00205 ~affinity_partition_type() { |
| <a name="l00206"></a>00206 <span class="comment">// The delay_list can be non-empty if an exception is thrown.</span> |
| <a name="l00207"></a>00207 <span class="keywordflow">while</span>( !delay_list.empty() ) { |
| <a name="l00208"></a>00208 task& t = delay_list.pop_front(); |
| <a name="l00209"></a>00209 t.destroy(t); |
| <a name="l00210"></a>00210 } |
| <a name="l00211"></a>00211 } |
| <a name="l00212"></a>00212 }; |
| <a name="l00213"></a>00213 |
| <a name="l00214"></a>00214 } <span class="comment">// namespace internal</span> |
| <a name="l00216"></a>00216 <span class="comment"></span> |
| <a name="l00217"></a>00217 |
| <a name="l00218"></a>00218 } <span class="comment">// namespace tbb</span> |
| <a name="l00219"></a>00219 |
| <a name="l00220"></a>00220 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_partitioner_H */</span> |
| </pre></div><hr> |
| <p></p> |
| Copyright © 2005-2010 Intel Corporation. All Rights Reserved. |
| <p></p> |
| Intel, Pentium, Intel Xeon, Itanium, Intel XScale and VTune are |
| registered trademarks or trademarks of Intel Corporation or its |
| subsidiaries in the United States and other countries. |
| <p></p> |
| * Other names and brands may be claimed as the property of others. |
