FreeBSD Manual Pages
hwlocality...distribute(3) Library Functions Manual hwlocality...distribute(3) NAME hwlocality_helper_distribute - Distributing items over a topology SYNOPSIS Enumerations enum hwloc_distrib_flags_e { HWLOC_DISTRIB_FLAG_REVERSE } Functions static int hwloc_distrib (hwloc_topology_t topology, hwloc_obj_t *roots, unsigned n_roots, hwloc_cpuset_t *set, unsigned n, int until, unsigned long flags) Detailed Description Enumeration Type Documentation enum hwloc_distrib_flags_e Flags to be given to hwloc_distrib(). Enumerator HWLOC_DISTRIB_FLAG_REVERSE Distrib in reverse order, starting from the last objects. Function Documentation static int hwloc_distrib (hwloc_topology_t topology, hwloc_obj_t * roots, unsigned n_roots, hwloc_cpuset_t * set, unsigned n, int until, unsigned long flags) [inline], [static] Distribute n items over the topology under roots. Array set will be filled with n cpusets recursively distributed linearly over the topology under objects roots, down to depth until (which can be INT_MAX to distribute down to the finest level). n_roots is usually 1 and roots only contains the topology root object so as to distribute over the entire topology. This is typically useful when an application wants to distribute n threads over a machine, giving each of them as much private cache as possible and keeping them locally in number order. The caller may typically want to also call hwloc_bitmap_singlify() before binding a thread so that it does not move at all. flags should be 0 or a OR'ed set of hwloc_distrib_flags_e. Returns 0 on success, -1 on error. Note On hybrid CPUs (or asymmetric platforms), distribution may be suboptimal since the number of cores or PUs inside packages or below caches may vary (the top-down recursive partitioning ignores these numbers until reaching their levels). Hence it is recommended to distribute only inside a single homogeneous domain. For instance on a CPU with energy-efficient E-cores and high-performance P- cores, one should distribute separately N tasks on E-cores and M tasks on P-cores instead of trying to distribute directly M+N tasks on the entire CPUs. This function requires the roots objects to have a CPU set. Author Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code. Hardware Locality (hwloc) Version 2.11.2 hwlocality...distribute(3)
NAME | SYNOPSIS | Detailed Description | Enumeration Type Documentation | Function Documentation | Author
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=HWLOC_DISTRIB_FLAG_REVERSE&sektion=3&manpath=FreeBSD+Ports+14.3.quarterly>