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<title>Hardware Locality (hwloc): Interoperability with the NVIDIA Management Library</title>
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<div id="projectname">Hardware Locality (hwloc)
 <span id="projectnumber">1.10.0</span>
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<a href="#func-members">Functions</a> </div>
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<div class="title">Interoperability with the NVIDIA Management Library</div> </div>
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Functions</h2></td></tr>
<tr class="memitem:ga26cf0036d09ec4d7cb692380fac9659d"><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00110.html#ga26cf0036d09ec4d7cb692380fac9659d">hwloc_nvml_get_device_cpuset</a> (<a class="el" href="a00076.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, nvmlDevice_t device, <a class="el" href="a00073.html#ga4bbf39b68b6f568fb92739e7c0ea7801">hwloc_cpuset_t</a> set)</td></tr>
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<tr class="memitem:gacd50fd0e2766ee05bc13234b46714756"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00075.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00110.html#gacd50fd0e2766ee05bc13234b46714756">hwloc_nvml_get_device_osdev_by_index</a> (<a class="el" href="a00076.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, unsigned idx)</td></tr>
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<tr class="memitem:gaf176159b5760a191871eff23f5a69ee9"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00075.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00110.html#gaf176159b5760a191871eff23f5a69ee9">hwloc_nvml_get_device_osdev</a> (<a class="el" href="a00076.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, nvmlDevice_t device)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>This interface offers ways to retrieve topology information about devices managed by the NVIDIA Management Library (NVML). </p>
<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">static int hwloc_nvml_get_device_cpuset </td>
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<p>Get the CPU set of logical processors that are physically close to NVML device <code>device</code>. </p>
<p>Return the CPU set describing the locality of the NVML device <code>device</code>.</p>
<p>Topology <code>topology</code> and device <code>device</code> must match the local machine. I/O devices detection and the NVML component are not needed in the topology.</p>
<p>The function only returns the locality of the device. If more information about the device is needed, OS objects should be used instead, see <a class="el" href="a00110.html#gaf176159b5760a191871eff23f5a69ee9" title="Get the hwloc OS device object corresponding to NVML device device. ">hwloc_nvml_get_device_osdev()</a> and <a class="el" href="a00110.html#gacd50fd0e2766ee05bc13234b46714756" title="Get the hwloc OS device object corresponding to the NVML device whose index is idx. ">hwloc_nvml_get_device_osdev_by_index()</a>.</p>
<p>This function is currently only implemented in a meaningful way for Linux; other systems will simply get a full cpuset. </p>
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<td class="memname">static <a class="el" href="a00075.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> hwloc_nvml_get_device_osdev </td>
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<p>Get the hwloc OS device object corresponding to NVML device <code>device</code>. </p>
<p>Return the hwloc OS device object that describes the given NVML device <code>device</code>. Return NULL if there is none.</p>
<p>Topology <code>topology</code> and device <code>device</code> must match the local machine. I/O devices detection and the NVML component must be enabled in the topology. If not, the locality of the object may still be found using <a class="el" href="a00110.html#ga26cf0036d09ec4d7cb692380fac9659d" title="Get the CPU set of logical processors that are physically close to NVML device device. ">hwloc_nvml_get_device_cpuset()</a>.</p>
<dl class="section note"><dt>Note</dt><dd>The corresponding hwloc PCI device may be found by looking at the result parent pointer. </dd></dl>
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<td class="memname">static <a class="el" href="a00075.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> hwloc_nvml_get_device_osdev_by_index </td>
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<p>Get the hwloc OS device object corresponding to the NVML device whose index is <code>idx</code>. </p>
<p>Return the OS device object describing the NVML device whose index is <code>idx</code>. Returns NULL if there is none.</p>
<p>The topology <code>topology</code> does not necessarily have to match the current machine. For instance the topology may be an XML import of a remote host. I/O devices detection and the NVML component must be enabled in the topology.</p>
<dl class="section note"><dt>Note</dt><dd>The corresponding PCI device object can be obtained by looking at the OS device parent object. </dd></dl>
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