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gethomelgroup(3c) [opensolaris man page]

getcpuid(3C)						   Standard C Library Functions 					      getcpuid(3C)

NAME
getcpuid, gethomelgroup - obtain information on scheduling decisions SYNOPSIS
#include <sys/processor.h> processorid_t getcpuid(void); ushort_t gethomelgroup(void); DESCRIPTION
The getcpuid() function returns the processor ID on which the calling thread is currently executing. The gethomelgroup() function returns the home locality group ID of the calling thread. RETURN VALUES
See DESCRIPTION. ERRORS
No errors are defined. USAGE
Both the current CPU and the home locality group can change at any time. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |getcpuid() is Stable; geth- | | |omelgroup() is Obsolete. | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
psradm(1M), psrinfo(1M), psrset(1M), p_online(2), processor_bind(2), processor_info(2), pset_assign(2), pset_bind(2), pset_info(2), mem- info(2), lgrp_home(3LGRP), sysconf(3C), attributes(5) NOTES
The gethomelgroup() function is obsolete and might be removed in a future release. It has been replaced by lgrp_home(3LGRP). SunOS 5.11 16 Apr 2003 getcpuid(3C)

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lgrp_home(3LGRP)					 Locality Group Library Functions					  lgrp_home(3LGRP)

NAME
lgrp_home - get home lgroup SYNOPSIS
cc [ flag... ] file... -llgrp [ library... ] #include <sys/lgrp_user.h> lgrp_id_t lgrp_home(idtype_t idtype, id_t id); DESCRIPTION
The lgrp_home() function returns the ID of the home lgroup for the given process or thread. A thread can have an affinity for an lgroup in the system such that the thread will tend to be scheduled to run on that lgroup and allocate memory from there whenever possible. The lgroup with the strongest affinity that the thread can run on is known as the "home lgroup" of the thread. If the thread has no affinity for any lgroup that it can run on, the operating system will choose a home for it. The idtype argument should be P_PID to specify a process and the id argument should be its process ID. Otherwise, the idtype argument should be P_LWPID to specify a thread and the id argument should be its LWP ID. The value P_MYID can be used for the id argument to specify the current process or thread. RETURN VALUES
Upon successful completion, lgrp_home() returns the ID of the home lgroup of the specified process or thread. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
The lgrp_home() function will fail if: EINVAL The ID type is not valid. EPERM The effective user of the calling process does not have appropriate privileges, and its real or effective user ID does not match the real or effective user ID of one of the threads. ESRCH The specified process or thread was not found. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
lgrp_affinity_get(3LGRP), lgrp_init(3LGRP), attributes(5) SunOS 5.10 1 Jun 2003 lgrp_home(3LGRP)
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