1. Oracle Solaris 11.4 Programming Interfaces Guide
  2. Locality Group APIs
  3. Locality Groups and Thread and Memory Placement

Locality Groups and Thread and Memory Placement

This section discusses the APIs used to discover and affect thread and memory placement with respect to lgroups.

  • The lgrp_home() function is used to discover thread placement. For more information, see the lgrp_home(3LGRP) man page.

  • The meminfo() system call is used to discover memory placement. For more information, see the meminfo(2) man page.

  • The MADV_ACCESS flags to the madvise() function are used to affect memory allocation among lgroups. For more information, see the madvise(3C) man page.

  • The lgrp_affinity_set() function can affect thread and memory placement by setting a thread's affinity for a given lgroup. For more information, see the lgrp_affinity_set(3LGRP) man page.

  • The affinities of an lgroup may specify an order of preference for lgroups from which to allocate resources.

  • The kernel needs information about the likely pattern of an application's memory use in order to allocate memory resources efficiently.

  • The madvise() function and its shared object analogue madv.so.1 provides this information to the kernel.

  • A running process can gather memory usage information about itself by using the meminfo() system call.