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<div id="projectname">Hardware Locality (hwloc)
 <span id="projectnumber">2.4.1</span>
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<a href="#pub-attribs">Data Fields</a> </div>
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<div class="title">hwloc_distances_s Struct Reference<div class="ingroups"><a class="el" href="a00214.html">Retrieve distances between objects</a></div></div> </div>
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<p><code>#include <<a class="el" href="a00137_source.html">distances.h</a>></code></p>
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Data Fields</h2></td></tr>
<tr class="memitem:a4ca2af858cebbce7324ec49903d09474"><td class="memItemLeft" align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="a00316.html#a4ca2af858cebbce7324ec49903d09474">nbobjs</a></td></tr>
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<tr class="memitem:af1e78b2d628d191fa6cae3fbfe891078"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00191.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00316.html#af1e78b2d628d191fa6cae3fbfe891078">objs</a></td></tr>
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<tr class="memitem:aef9c83cf467da1b1fa4c36493febb3b5"><td class="memItemLeft" align="right" valign="top">unsigned long </td><td class="memItemRight" valign="bottom"><a class="el" href="a00316.html#aef9c83cf467da1b1fa4c36493febb3b5">kind</a></td></tr>
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<tr class="memitem:ae43e19b2c743de05c93d71a30beaca75"><td class="memItemLeft" align="right" valign="top">hwloc_uint64_t * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00316.html#ae43e19b2c743de05c93d71a30beaca75">values</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Matrix of distances between a set of objects. </p>
<p>This matrix often contains latencies between NUMA nodes (as reported in the System Locality Distance Information Table (SLIT) in the ACPI specification), which may or may not be physically accurate. It corresponds to the latency for accessing the memory of one node from a core in another node. The corresponding kind is <a class="el" href="a00214.html#ggab1bb10d3adb85b52cdc6fe5a7f74f108a90dc38248c8d5392d4dd3e88f391e984" title="These distances were obtained from the operating system or hardware.">HWLOC_DISTANCES_KIND_FROM_OS</a> | <a class="el" href="a00214.html#ggab1bb10d3adb85b52cdc6fe5a7f74f108a0148d7f9be833a04f5a55455437c227b" title="These distances were provided by the user.">HWLOC_DISTANCES_KIND_FROM_USER</a>. The name of this distances structure is "NUMALatency".</p>
<p>The matrix may also contain bandwidths between random sets of objects, possibly provided by the user, as specified in the <code>kind</code> attribute. </p>
</div><h2 class="groupheader">Field Documentation</h2>
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<td class="memname">unsigned long hwloc_distances_s::kind</td>
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<p>OR'ed set of <a class="el" href="a00214.html#gab1bb10d3adb85b52cdc6fe5a7f74f108" title="Kinds of distance matrices.">hwloc_distances_kind_e</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a4ca2af858cebbce7324ec49903d09474">◆ </a></span>nbobjs</h2>
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<td class="memname">unsigned hwloc_distances_s::nbobjs</td>
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<p>Number of objects described by the distance matrix. </p>
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<td class="memname"><a class="el" href="a00191.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a>* hwloc_distances_s::objs</td>
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<p>Array of objects described by the distance matrix. These objects are not in any particular order, see <a class="el" href="a00215.html#gab9e770c7d56c5d6040f26bd1dc8854cd" title="Find the index of an object in a distances structure.">hwloc_distances_obj_index()</a> and <a class="el" href="a00215.html#ga3c665b23056e3269f777b21a67148c82" title="Find the values between two objects in a distance matrices.">hwloc_distances_obj_pair_values()</a> for easy ways to find objects in this array and their corresponding values. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ae43e19b2c743de05c93d71a30beaca75">◆ </a></span>values</h2>
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<p>Matrix of distances between objects, stored as a one-dimension array. </p>
<p>Distance from i-th to j-th object is stored in slot i*nbobjs+j. The meaning of the value depends on the <code>kind</code> attribute. </p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li><a class="el" href="a00137_source.html">distances.h</a></li>
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