82 lines
3.7 KiB
Groff
82 lines
3.7 KiB
Groff
.TH "hwlocality_cudart" 3 "Wed Dec 14 2022" "Version 2.9.0" "Hardware Locality (hwloc)" \" -*- nroff -*-
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.ad l
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.nh
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.SH NAME
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hwlocality_cudart \- Interoperability with the CUDA Runtime API
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.SH SYNOPSIS
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.br
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.PP
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.SS "Functions"
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.in +1c
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.ti -1c
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.RI "static int \fBhwloc_cudart_get_device_pci_ids\fP (\fBhwloc_topology_t\fP topology, int idx, int *domain, int *bus, int *dev)"
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.br
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.ti -1c
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.RI "static int \fBhwloc_cudart_get_device_cpuset\fP (\fBhwloc_topology_t\fP topology, int idx, \fBhwloc_cpuset_t\fP set)"
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.br
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.ti -1c
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.RI "static \fBhwloc_obj_t\fP \fBhwloc_cudart_get_device_pcidev\fP (\fBhwloc_topology_t\fP topology, int idx)"
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.br
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.ti -1c
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.RI "static \fBhwloc_obj_t\fP \fBhwloc_cudart_get_device_osdev_by_index\fP (\fBhwloc_topology_t\fP topology, unsigned idx)"
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.br
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.in -1c
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.SH "Detailed Description"
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.PP
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This interface offers ways to retrieve topology information about CUDA devices when using the CUDA Runtime API\&.
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.SH "Function Documentation"
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.PP
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.SS "static int hwloc_cudart_get_device_cpuset (\fBhwloc_topology_t\fP topology, int idx, \fBhwloc_cpuset_t\fP set)\fC [inline]\fP, \fC [static]\fP"
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.PP
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Get the CPU set of processors that are physically close to device \fCidx\fP\&. Store in \fCset\fP the CPU-set describing the locality of the CUDA device whose index is \fCidx\fP\&.
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.PP
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Topology \fCtopology\fP and device \fCidx\fP must match the local machine\&. I/O devices detection and the CUDA component are not needed in the topology\&.
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.PP
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The function only returns the locality of the device\&. If more information about the device is needed, OS objects should be used instead, see \fBhwloc_cudart_get_device_osdev_by_index()\fP\&.
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.PP
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This function is currently only implemented in a meaningful way for Linux; other systems will simply get a full cpuset\&.
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.SS "static \fBhwloc_obj_t\fP hwloc_cudart_get_device_osdev_by_index (\fBhwloc_topology_t\fP topology, unsigned idx)\fC [inline]\fP, \fC [static]\fP"
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.PP
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Get the hwloc OS device object corresponding to the CUDA device whose index is \fCidx\fP\&.
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.PP
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\fBReturns\fP
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.RS 4
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The hwloc OS device object describing the CUDA device whose index is \fCidx\fP\&.
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.PP
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\fCNULL\fP if none could be found\&.
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.RE
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.PP
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The topology \fCtopology\fP 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 CUDA component must be enabled in the topology\&. If not, the locality of the object may still be found using \fBhwloc_cudart_get_device_cpuset()\fP\&.
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.PP
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\fBNote\fP
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.RS 4
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The corresponding PCI device object can be obtained by looking at the OS device parent object (unless PCI devices are filtered out)\&.
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.PP
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This function is identical to \fBhwloc_cuda_get_device_osdev_by_index()\fP\&.
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.RE
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.PP
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.SS "static int hwloc_cudart_get_device_pci_ids (\fBhwloc_topology_t\fP topology, int idx, int * domain, int * bus, int * dev)\fC [inline]\fP, \fC [static]\fP"
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.PP
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Return the domain, bus and device IDs of the CUDA device whose index is \fCidx\fP\&. Device index \fCidx\fP must match the local machine\&.
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.SS "static \fBhwloc_obj_t\fP hwloc_cudart_get_device_pcidev (\fBhwloc_topology_t\fP topology, int idx)\fC [inline]\fP, \fC [static]\fP"
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.PP
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Get the hwloc PCI device object corresponding to the CUDA device whose index is \fCidx\fP\&.
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.PP
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\fBReturns\fP
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.RS 4
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The hwloc PCI device object describing the CUDA device whose index is \fCidx\fP\&.
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.PP
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\fCNULL\fP if none could be found\&.
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.RE
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.PP
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Topology \fCtopology\fP and device \fCidx\fP must match the local machine\&. I/O devices detection must be enabled in topology \fCtopology\fP\&. The CUDA component is not needed in the topology\&.
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.SH "Author"
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.PP
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Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code\&.
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