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lgrp_mem_size(3lgrp) [minix man page]

lgrp_mem_size(3LGRP)													      lgrp_mem_size(3LGRP)

NAME
lgrp_mem_size - return the memory size of the given lgroup SYNOPSIS
cc [ flag... ] file... -llgrp [ library... ] #include <sys/lgrp_user.h> lgrp_mem_size_t lgrp_mem_size(lgrp_cookie_t cookie, lgrp_id_t lgrp, int type, int content); The lgrp_mem_size() function takes a cookie representing a snapshot of the lgroup hierarchy. The cookie was obtained by calling lgrp_init(3LGRP). The lgrp_mem_size() function returns the memory size of the given lgroup in bytes. The type argument should be set to one of the following values: LGRP_MEM_SZ_FREE /* free memory */ LGRP_MEM_SZ_INSTALLED /* installed memory */ The content argument should be set to one of the following values to specify whether the direct contents or everything in this lgroup should be returned: LGRP_CONTENT_ALL /* everything in this lgroup */ LGRP_CONTENT_DIRECT /* directly contained in lgroup */ LGRP_CONTENT_HIERARCHY /* everything within this hierarchy (for */ /* compatibility only, use LGRP_CONTENT_ALL) */ The LGRP_CONTENT_HIERARCHY value can still be used, but is being replaced by LGRP_CONTENT_ALL. The total sizes include all the memory in the lgroup including its children, while the others reflect only the memory contained directly in the given lgroup. Upon successful completion, the size in bytes is returned. Otherwise, -1 is returned and errno is set to indicate the error. The lgrp_mem_size() function will fail if: EINVAL The specified cookie, lgroup ID, or one of the flags is not valid. ESRCH The specified lgroup ID was not found. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ lgrp_init(3LGRP), lgrp_cpus(3LGRP), lgrp_resources(3LGRP), liblgrp(3LIB), attributes(5) 26 Jan 2005 lgrp_mem_size(3LGRP)

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lgrp_init(3LGRP)														  lgrp_init(3LGRP)

NAME
lgrp_init - initialize lgroup interface SYNOPSIS
cc [ flag... ] file... -llgrp [ library... ] #include <sys/lgrp_user.h> lgrp_cookie_t lgrp_init(lgrp_view_t view); The lgrp_init() function initializes the lgroup interface and takes a snapshot of the lgroup hierarchy with the given view. If the given view is LGRP_VIEW_CALLER, the snapshot contains only the resources that are available to the caller (for example, with respect to processor sets). When the view is LGRP_VIEW_OS, the snapshot contains what is available to the operating system. Given the view, lgrp_init() returns a cookie representing this snapshot of the lgroup hierarchy. This cookie should be used with other rou- tines in the lgroup interface needing the lgroup hierarchy. The lgrp_fini(3LGRP) function should be called with the cookie when it is no longer needed. The lgroup hiearchy represents the latency topology of the machine. The hierarchy is simplified to be a tree and can be used to find the nearest resources. The lgroup hiearchy consists of a root lgroup, which is the maximum bounding locality group of the system, contains all the CPU and memory resources of the machine, and may contain other locality groups that contain CPUs and memory within a smaller locality. The leaf lgroups contain resources within the smallest latency. The resources of a given lgroup come directly from the lgroup itself or from leaf lgroups contained within the lgroup. Leaf lgroups directly contain their own resources and do not encapsulate any other lgroups. The lgroup hierarchy can be used to find the nearest resources. From a given lgroup, the closest resources can be found in the lgroup itself. After that, the next nearest resources can be found in its parent lgroup, and so on until the root lgroup is reached where all the resources of the machine are located. Upon successful completion, lgrp_init() returns a cookie. Otherwise it returns LGRP_COOKIE_NONE and sets errno to indicate the error. The lgrp_init() function will fail if: EINVAL The view is not valid. ENOMEM There was not enough memory to allocate the snapshot of the lgroup hierarchy. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ lgrp_children(3LGRP), lgrp_cookie_stale(3LGRP), lgrp_cpus(3LGRP), lgrp_fini(3LGRP), lgrp_mem_size(3LGRP), lgrp_nlgrps(3LGRP), lgrp_par- ents(3LGRP), lgrp_resources(3LGRP), lgrp_root(3LGRP), lgrp_view(3LGRP), liblgrp(3LIB), attributes(5) 26 Jan 2005 lgrp_init(3LGRP)
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