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<div id="projectname">Hardware Locality (hwloc)
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<div class="title">Converting between CPU sets and node sets</div> </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga8fbd641f284673a3e884e8e556044eba"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00093.html#ga8fbd641f284673a3e884e8e556044eba">hwloc_cpuset_to_nodeset</a> (<a class="el" href="a00076.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, <a class="el" href="a00073.html#ga1f784433e9b606261f62d1134f6a3b25">hwloc_const_cpuset_t</a> _cpuset, <a class="el" href="a00073.html#ga37e35730fa7e775b5bb0afe893d6d508">hwloc_nodeset_t</a> nodeset)</td></tr>
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<tr class="memitem:ga014490779e7012ffec2b5ccee020c0ae"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00093.html#ga014490779e7012ffec2b5ccee020c0ae">hwloc_cpuset_to_nodeset_strict</a> (struct hwloc_topology *topology, <a class="el" href="a00073.html#ga1f784433e9b606261f62d1134f6a3b25">hwloc_const_cpuset_t</a> _cpuset, <a class="el" href="a00073.html#ga37e35730fa7e775b5bb0afe893d6d508">hwloc_nodeset_t</a> nodeset)</td></tr>
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<tr class="memitem:ga2ed57313ce5bf85f3ac156932ecf639d"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00093.html#ga2ed57313ce5bf85f3ac156932ecf639d">hwloc_cpuset_from_nodeset</a> (<a class="el" href="a00076.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, <a class="el" href="a00073.html#ga4bbf39b68b6f568fb92739e7c0ea7801">hwloc_cpuset_t</a> _cpuset, <a class="el" href="a00073.html#ga2f5276235841ad66a79bedad16a5a10c">hwloc_const_nodeset_t</a> nodeset)</td></tr>
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<tr class="memitem:gacde800e58b8cdb746706b371ca4b97e0"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00093.html#gacde800e58b8cdb746706b371ca4b97e0">hwloc_cpuset_from_nodeset_strict</a> (struct hwloc_topology *topology, <a class="el" href="a00073.html#ga4bbf39b68b6f568fb92739e7c0ea7801">hwloc_cpuset_t</a> _cpuset, <a class="el" href="a00073.html#ga2f5276235841ad66a79bedad16a5a10c">hwloc_const_nodeset_t</a> nodeset)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>There are two semantics for converting cpusets to nodesets depending on how non-NUMA machines are handled.</p>
<p>When manipulating nodesets for memory binding, non-NUMA machines should be considered as having a single NUMA node. The standard conversion routines below should be used so that marking the first bit of the nodeset means that memory should be bound to a non-NUMA whole machine.</p>
<p>When manipulating nodesets as an actual list of NUMA nodes without any need to handle memory binding on non-NUMA machines, the strict conversion routines may be used instead. </p>
<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">static void hwloc_cpuset_from_nodeset </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00076.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> </td>
<td class="paramname"><em>topology</em>, </td>
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<td class="paramtype"><a class="el" href="a00073.html#ga4bbf39b68b6f568fb92739e7c0ea7801">hwloc_cpuset_t</a> </td>
<td class="paramname"><em>_cpuset</em>, </td>
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<td class="paramtype"><a class="el" href="a00073.html#ga2f5276235841ad66a79bedad16a5a10c">hwloc_const_nodeset_t</a> </td>
<td class="paramname"><em>nodeset</em> </td>
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<p>Convert a NUMA node set into a CPU set and handle non-NUMA cases. </p>
<p>If the topology contains no NUMA nodes, the machine is considered as a single memory node, and the following behavior is used: If <code>nodeset</code> is empty, <code>cpuset</code> will be emptied as well. Otherwise <code>cpuset</code> will be entirely filled. This is useful for manipulating memory binding sets. </p>
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<td class="memname">static void hwloc_cpuset_from_nodeset_strict </td>
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<td class="paramtype">struct hwloc_topology * </td>
<td class="paramname"><em>topology</em>, </td>
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<td class="paramtype"><a class="el" href="a00073.html#ga4bbf39b68b6f568fb92739e7c0ea7801">hwloc_cpuset_t</a> </td>
<td class="paramname"><em>_cpuset</em>, </td>
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<td class="paramtype"><a class="el" href="a00073.html#ga2f5276235841ad66a79bedad16a5a10c">hwloc_const_nodeset_t</a> </td>
<td class="paramname"><em>nodeset</em> </td>
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<p>Convert a NUMA node set into a CPU set without handling non-NUMA cases. </p>
<p>This is the strict variant of <a class="el" href="a00093.html#ga2ed57313ce5bf85f3ac156932ecf639d" title="Convert a NUMA node set into a CPU set and handle non-NUMA cases. ">hwloc_cpuset_from_nodeset</a>. It does not fix non-NUMA cases. If the topology contains some NUMA nodes, behave exactly the same. However, if the topology contains no NUMA nodes, return an empty cpuset. </p>
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<td class="memname">static void hwloc_cpuset_to_nodeset </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00076.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> </td>
<td class="paramname"><em>topology</em>, </td>
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<td class="paramtype"><a class="el" href="a00073.html#ga1f784433e9b606261f62d1134f6a3b25">hwloc_const_cpuset_t</a> </td>
<td class="paramname"><em>_cpuset</em>, </td>
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<td class="paramtype"><a class="el" href="a00073.html#ga37e35730fa7e775b5bb0afe893d6d508">hwloc_nodeset_t</a> </td>
<td class="paramname"><em>nodeset</em> </td>
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<p>Convert a CPU set into a NUMA node set and handle non-NUMA cases. </p>
<p>If some NUMA nodes have no CPUs at all, this function never sets their indexes in the output node set, even if a full CPU set is given in input.</p>
<p>If the topology contains no NUMA nodes, the machine is considered as a single memory node, and the following behavior is used: If <code>cpuset</code> is empty, <code>nodeset</code> will be emptied as well. Otherwise <code>nodeset</code> will be entirely filled. </p>
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<td class="memname">static void hwloc_cpuset_to_nodeset_strict </td>
<td>(</td>
<td class="paramtype">struct hwloc_topology * </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="a00073.html#ga1f784433e9b606261f62d1134f6a3b25">hwloc_const_cpuset_t</a> </td>
<td class="paramname"><em>_cpuset</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="a00073.html#ga37e35730fa7e775b5bb0afe893d6d508">hwloc_nodeset_t</a> </td>
<td class="paramname"><em>nodeset</em> </td>
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<td>)</td>
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<p>Convert a CPU set into a NUMA node set without handling non-NUMA cases. </p>
<p>This is the strict variant of <a class="el" href="a00093.html#ga8fbd641f284673a3e884e8e556044eba" title="Convert a CPU set into a NUMA node set and handle non-NUMA cases. ">hwloc_cpuset_to_nodeset</a>. It does not fix non-NUMA cases. If the topology contains some NUMA nodes, behave exactly the same. However, if the topology contains no NUMA nodes, return an empty nodeset. </p>
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