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hwlocality_windows.3

hwlocality_windows.3 2.3 KB
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  1. .TH "hwlocality_windows" 3 "Thu Sep 7 2023" "Version 2.9.3" "Hardware Locality (hwloc)" \" -*- nroff -*-
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  2. .ad l
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  3. .nh
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  4. .SH NAME
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  5. hwlocality_windows \- Windows-specific helpers
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  6. .SH SYNOPSIS
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  7. .br
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  8. .PP
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  9. .SS "Functions"
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  10. 

  11. .in +1c
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  12. .ti -1c
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  13. .RI "int \fBhwloc_windows_get_nr_processor_groups\fP (\fBhwloc_topology_t\fP topology, unsigned long flags)"
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  14. .br
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  15. .ti -1c
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  16. .RI "int \fBhwloc_windows_get_processor_group_cpuset\fP (\fBhwloc_topology_t\fP topology, unsigned pg_index, \fBhwloc_cpuset_t\fP cpuset, unsigned long flags)"
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  17. .br
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  18. .in -1c
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  19. .SH "Detailed Description"
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  20. .PP 
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  21. These functions query Windows processor groups\&. These groups partition the operating system into virtual sets of up to 64 neighbor PUs\&. Threads and processes may only be bound inside a single group\&. Although Windows processor groups may be exposed in the hwloc hierarchy as hwloc Groups, they are also often merged into existing hwloc objects such as NUMA nodes or Packages\&. This API provides explicit information about Windows processor groups so that applications know whether binding to a large set of PUs may fail because it spans over multiple Windows processor groups\&. 
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  22. .SH "Function Documentation"
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  23. .PP 
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  24. .SS "int hwloc_windows_get_nr_processor_groups (\fBhwloc_topology_t\fP topology, unsigned long flags)"
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  25. 

  26. .PP
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  27. Get the number of Windows processor groups\&. \fCflags\fP must be 0 for now\&.
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  28. .PP
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  29. \fBReturns\fP
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  30. .RS 4
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  31. at least \fC1\fP on success\&. 
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  32. .PP
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  33. -1 on error, for instance if the topology does not match the current system (e\&.g\&. loaded from another machine through XML)\&. 
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  34. .RE
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  35. .PP
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  36. 

  37. .SS "int hwloc_windows_get_processor_group_cpuset (\fBhwloc_topology_t\fP topology, unsigned pg_index, \fBhwloc_cpuset_t\fP cpuset, unsigned long flags)"
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  38. 

  39. .PP
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  40. Get the CPU-set of a Windows processor group\&. Get the set of PU included in the processor group specified by \fCpg_index\fP\&. \fCpg_index\fP must be between \fC0\fP and the value returned by \fBhwloc_windows_get_nr_processor_groups()\fP minus 1\&.
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  41. .PP
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  42. \fCflags\fP must be 0 for now\&.
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  43. .PP
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  44. \fBReturns\fP
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  45. .RS 4
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  46. \fC0\fP on success\&. 
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  47. .PP
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  48. \fC-1\fP on error, for instance if \fCpg_index\fP is invalid, or if the topology does not match the current system (e\&.g\&. loaded from another machine through XML)\&. 
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  49. .RE
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  50. .PP
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  51. 

  52. .SH "Author"
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  53. .PP 
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  54. Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code\&.
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