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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Hardware Locality (hwloc): Add or remove distances between objects</title>
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<div class="title">Add or remove distances between objects</div>  </div>
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Enumerations</h2></td></tr>
<tr class="memitem:ga22428b6bab271411e3834e6b4ca22e37"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00216.html#ga22428b6bab271411e3834e6b4ca22e37">hwloc_distances_add_flag_e</a> { <a class="el" href="a00216.html#gga22428b6bab271411e3834e6b4ca22e37a7f6baba797d70538d03c9d13052c62ab">HWLOC_DISTANCES_ADD_FLAG_GROUP</a>
, <a class="el" href="a00216.html#gga22428b6bab271411e3834e6b4ca22e37a5233ccf631c3bc53dd5c3e7a5d5c9b77">HWLOC_DISTANCES_ADD_FLAG_GROUP_INACCURATE</a>
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Functions</h2></td></tr>
<tr class="memitem:gac5a71d96cd86efe31d6f8d282aae3d97"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00216.html#gac5a71d96cd86efe31d6f8d282aae3d97">hwloc_distances_add</a> (<a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, unsigned nbobjs, <a class="el" href="a00191.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> *objs, hwloc_uint64_t *values, unsigned long kind, unsigned long flags)</td></tr>
<tr class="separator:gac5a71d96cd86efe31d6f8d282aae3d97"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gac188d9b64d9560255ce5f6d0a20f9c0a"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00216.html#gac188d9b64d9560255ce5f6d0a20f9c0a">hwloc_distances_remove</a> (<a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology)</td></tr>
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<tr class="memitem:gaa642a4c1a21c84f38ae23fca8a27845d"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00216.html#gaa642a4c1a21c84f38ae23fca8a27845d">hwloc_distances_remove_by_depth</a> (<a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, int depth)</td></tr>
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<tr class="memitem:ga93db53773c96f5b83815e8441e2ebb93"><td class="memItemLeft" align="right" valign="top">static int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00216.html#ga93db53773c96f5b83815e8441e2ebb93">hwloc_distances_remove_by_type</a> (<a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, <a class="el" href="a00190.html#gacd37bb612667dc437d66bfb175a8dc55">hwloc_obj_type_t</a> type)</td></tr>
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<tr class="memitem:ga80bbf6f0db9af48c61780dd5152664c2"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00216.html#ga80bbf6f0db9af48c61780dd5152664c2">hwloc_distances_release_remove</a> (<a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, struct <a class="el" href="a00316.html">hwloc_distances_s</a> *distances)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2 class="groupheader">Enumeration Type Documentation</h2>
<a id="ga22428b6bab271411e3834e6b4ca22e37"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga22428b6bab271411e3834e6b4ca22e37">&#9670;&nbsp;</a></span>hwloc_distances_add_flag_e</h2>

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          <td class="memname">enum <a class="el" href="a00216.html#ga22428b6bab271411e3834e6b4ca22e37">hwloc_distances_add_flag_e</a></td>
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<p>Flags for adding a new distances to a topology. </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="gga22428b6bab271411e3834e6b4ca22e37a7f6baba797d70538d03c9d13052c62ab"></a>HWLOC_DISTANCES_ADD_FLAG_GROUP&#160;</td><td class="fielddoc"><p>Try to group objects based on the newly provided distance information. </p>
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<tr><td class="fieldname"><a id="gga22428b6bab271411e3834e6b4ca22e37a5233ccf631c3bc53dd5c3e7a5d5c9b77"></a>HWLOC_DISTANCES_ADD_FLAG_GROUP_INACCURATE&#160;</td><td class="fielddoc"><p>If grouping, consider the distance values as inaccurate and relax the comparisons during the grouping algorithms. The actual accuracy may be modified through the HWLOC_GROUPING_ACCURACY environment variable (see <a class="el" href="a00388.html">Environment Variables</a>). </p>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#gac5a71d96cd86efe31d6f8d282aae3d97">&#9670;&nbsp;</a></span>hwloc_distances_add()</h2>

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          <td class="memname">int hwloc_distances_add </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a>&#160;</td>
          <td class="paramname"><em>topology</em>, </td>
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          <td class="paramtype">unsigned&#160;</td>
          <td class="paramname"><em>nbobjs</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="a00191.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> *&#160;</td>
          <td class="paramname"><em>objs</em>, </td>
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          <td class="paramtype">hwloc_uint64_t *&#160;</td>
          <td class="paramname"><em>values</em>, </td>
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          <td class="paramtype">unsigned long&#160;</td>
          <td class="paramname"><em>kind</em>, </td>
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          <td class="paramtype">unsigned long&#160;</td>
          <td class="paramname"><em>flags</em>&#160;</td>
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<p>Provide a new distance matrix. </p>
<p>Provide the matrix of distances between a set of objects given by <code>nbobjs</code> and the <code>objs</code> array. <code>nbobjs</code> must be at least 2. The distances are stored as a one-dimension array in <code>values</code>. The distance from object i to object j is in slot i*nbobjs+j.</p>
<p><code>kind</code> specifies the kind of distance as a OR'ed set of <a class="el" href="a00214.html#gab1bb10d3adb85b52cdc6fe5a7f74f108" title="Kinds of distance matrices.">hwloc_distances_kind_e</a>. Kind <a class="el" href="a00214.html#ggab1bb10d3adb85b52cdc6fe5a7f74f108aa6cf2b6dfcf148b65952f811814efbe1" title="This distances structure covers objects of different types.">HWLOC_DISTANCES_KIND_HETEROGENEOUS_TYPES</a> will be automatically added if objects of different types are given.</p>
<p><code>flags</code> configures the behavior of the function using an optional OR'ed set of <a class="el" href="a00216.html#ga22428b6bab271411e3834e6b4ca22e37" title="Flags for adding a new distances to a topology.">hwloc_distances_add_flag_e</a>. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#ga80bbf6f0db9af48c61780dd5152664c2">&#9670;&nbsp;</a></span>hwloc_distances_release_remove()</h2>

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          <td class="memname">int hwloc_distances_release_remove </td>
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          <td class="paramtype"><a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a>&#160;</td>
          <td class="paramname"><em>topology</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">struct <a class="el" href="a00316.html">hwloc_distances_s</a> *&#160;</td>
          <td class="paramname"><em>distances</em>&#160;</td>
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<p>Release and remove the given distance matrice from the topology. </p>
<p>This function includes a call to <a class="el" href="a00214.html#ga1dd78c1f9acd54f26aba0e284e97e51d" title="Release a distance matrix structure previously returned by hwloc_distances_get().">hwloc_distances_release()</a>. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#gac188d9b64d9560255ce5f6d0a20f9c0a">&#9670;&nbsp;</a></span>hwloc_distances_remove()</h2>

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          <td class="memname">int hwloc_distances_remove </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a>&#160;</td>
          <td class="paramname"><em>topology</em></td><td>)</td>
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<p>Remove all distance matrices from a topology. </p>
<p>Remove all distance matrices, either provided by the user or gathered through the OS.</p>
<p>If these distances were used to group objects, these additional Group objects are not removed from the topology. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#gaa642a4c1a21c84f38ae23fca8a27845d">&#9670;&nbsp;</a></span>hwloc_distances_remove_by_depth()</h2>

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          <td class="memname">int hwloc_distances_remove_by_depth </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a>&#160;</td>
          <td class="paramname"><em>topology</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&#160;</td>
          <td class="paramname"><em>depth</em>&#160;</td>
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          <td>)</td>
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<p>Remove distance matrices for objects at a specific depth in the topology. </p>
<p>Identical to <a class="el" href="a00216.html#gac188d9b64d9560255ce5f6d0a20f9c0a" title="Remove all distance matrices from a topology.">hwloc_distances_remove()</a> but only applies to one level of the topology. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#ga93db53773c96f5b83815e8441e2ebb93">&#9670;&nbsp;</a></span>hwloc_distances_remove_by_type()</h2>

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          <td class="memname">static int hwloc_distances_remove_by_type </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00192.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a>&#160;</td>
          <td class="paramname"><em>topology</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="a00190.html#gacd37bb612667dc437d66bfb175a8dc55">hwloc_obj_type_t</a>&#160;</td>
          <td class="paramname"><em>type</em>&#160;</td>
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<p>Remove distance matrices for objects of a specific type in the topology. </p>
<p>Identical to <a class="el" href="a00216.html#gac188d9b64d9560255ce5f6d0a20f9c0a" title="Remove all distance matrices from a topology.">hwloc_distances_remove()</a> but only applies to one level of the topology. </p>

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