| sysctl.3 (127401) | sysctl.3 (131504) |
|---|---|
| 1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95 | 1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95 |
| 33.\" $FreeBSD: head/lib/libc/gen/sysctl.3 127401 2004-03-25 10:08:46Z bms $ | 33.\" $FreeBSD: head/lib/libc/gen/sysctl.3 131504 2004-07-02 23:52:20Z ru $ |
| 34.\" 35.Dd January 23, 2001 36.Dt SYSCTL 3 37.Os 38.Sh NAME 39.Nm sysctl , 40.Nm sysctlbyname , 41.Nm sysctlnametomib --- 36 unchanged lines hidden (view full) --- 78.Fa name , 79which is a 80.Fa namelen 81length array of integers. 82.Pp 83The 84.Fn sysctlbyname 85function accepts an ASCII representation of the name and internally | 34.\" 35.Dd January 23, 2001 36.Dt SYSCTL 3 37.Os 38.Sh NAME 39.Nm sysctl , 40.Nm sysctlbyname , 41.Nm sysctlnametomib --- 36 unchanged lines hidden (view full) --- 78.Fa name , 79which is a 80.Fa namelen 81length array of integers. 82.Pp 83The 84.Fn sysctlbyname 85function accepts an ASCII representation of the name and internally |
| 86looks up the integer name vector. Apart from that, it behaves the same | 86looks up the integer name vector. 87Apart from that, it behaves the same |
| 87as the standard 88.Fn sysctl 89function. 90.Pp 91The information is copied into the buffer specified by 92.Fa oldp . 93The size of the buffer is given by the location specified by 94.Fa oldlenp --- 354 unchanged lines hidden (view full) --- 449.It "KERN_PROC_PID A process ID" 450.It "KERN_PROC_PGRP A process group" 451.It "KERN_PROC_TTY A tty device" 452.It "KERN_PROC_UID A user ID" 453.It "KERN_PROC_RUID A real user ID" 454.El 455.Pp 456If the third level name is KERN_PROC_ARGS then the command line argument | 88as the standard 89.Fn sysctl 90function. 91.Pp 92The information is copied into the buffer specified by 93.Fa oldp . 94The size of the buffer is given by the location specified by 95.Fa oldlenp --- 354 unchanged lines hidden (view full) --- 450.It "KERN_PROC_PID A process ID" 451.It "KERN_PROC_PGRP A process group" 452.It "KERN_PROC_TTY A tty device" 453.It "KERN_PROC_UID A user ID" 454.It "KERN_PROC_RUID A real user ID" 455.El 456.Pp 457If the third level name is KERN_PROC_ARGS then the command line argument |
| 457array is returned in a flattened form, i.e. zero-terminated arguments | 458array is returned in a flattened form, i.e., zero-terminated arguments |
| 458follow each other. 459The total size of array is returned. 460It is also possible for a process to set its own process title this way. 461.Bl -column "Third level nameXXXXXX" "Fourth level is:XXXXXX" -offset indent 462.It Sy "Third level name Fourth level is:" 463.It "KERN_PROC_ARGS A process ID" 464.El 465.It Li KERN_PROF --- 281 unchanged lines hidden (view full) --- 747.It Li VM_METER 748Return the system wide virtual memory statistics. 749The returned data consists of a 750.Va struct vmtotal . 751.It Li VM_PAGEOUT_ALGORITHM 7520 if the statistics-based page management algorithm is in use 753or 1 if the near-LRU algorithm is in use. 754.It Li VM_SWAPPING_ENABLED | 459follow each other. 460The total size of array is returned. 461It is also possible for a process to set its own process title this way. 462.Bl -column "Third level nameXXXXXX" "Fourth level is:XXXXXX" -offset indent 463.It Sy "Third level name Fourth level is:" 464.It "KERN_PROC_ARGS A process ID" 465.El 466.It Li KERN_PROF --- 281 unchanged lines hidden (view full) --- 748.It Li VM_METER 749Return the system wide virtual memory statistics. 750The returned data consists of a 751.Va struct vmtotal . 752.It Li VM_PAGEOUT_ALGORITHM 7530 if the statistics-based page management algorithm is in use 754or 1 if the near-LRU algorithm is in use. 755.It Li VM_SWAPPING_ENABLED |
| 7551 if process swapping is enabled or 0 if disabled. This variable is | 7561 if process swapping is enabled or 0 if disabled. 757This variable is |
| 756permanently set to 0 if the kernel was built with swapping disabled. 757.It Li VM_V_CACHE_MAX 758Maximum desired size of the cache queue. 759.It Li VM_V_CACHE_MIN | 758permanently set to 0 if the kernel was built with swapping disabled. 759.It Li VM_V_CACHE_MAX 760Maximum desired size of the cache queue. 761.It Li VM_V_CACHE_MIN |
| 760Minimum desired size of the cache queue. If the cache queue size | 762Minimum desired size of the cache queue. 763If the cache queue size |
| 761falls very far below this value, the pageout daemon is awakened. 762.It Li VM_V_FREE_MIN 763Minimum amount of memory (cache memory plus free memory) 764required to be available before a process waiting on memory will be 765awakened. 766.It Li VM_V_FREE_RESERVED 767Processes will awaken the pageout daemon and wait for memory if the 768number of free and cached pages drops below this value. 769.It Li VM_V_FREE_TARGET 770The total amount of free memory (including cache memory) that the 771pageout daemon tries to maintain. 772.It Li VM_V_INACTIVE_TARGET 773The desired number of inactive pages that the pageout daemon should | 764falls very far below this value, the pageout daemon is awakened. 765.It Li VM_V_FREE_MIN 766Minimum amount of memory (cache memory plus free memory) 767required to be available before a process waiting on memory will be 768awakened. 769.It Li VM_V_FREE_RESERVED 770Processes will awaken the pageout daemon and wait for memory if the 771number of free and cached pages drops below this value. 772.It Li VM_V_FREE_TARGET 773The total amount of free memory (including cache memory) that the 774pageout daemon tries to maintain. 775.It Li VM_V_INACTIVE_TARGET 776The desired number of inactive pages that the pageout daemon should |
| 774achieve when it runs. Inactive pages can be quickly inserted into | 777achieve when it runs. 778Inactive pages can be quickly inserted into |
| 775process address space when needed. 776.It Li VM_V_PAGEOUT_FREE_MIN 777If the amount of free and cache memory falls below this value, the 778pageout daemon will enter "memory conserving mode" to avoid deadlock. 779.El 780.Sh RETURN VALUES 781.Rv -std 782.Sh ERRORS --- 81 unchanged lines hidden --- | 779process address space when needed. 780.It Li VM_V_PAGEOUT_FREE_MIN 781If the amount of free and cache memory falls below this value, the 782pageout daemon will enter "memory conserving mode" to avoid deadlock. 783.El 784.Sh RETURN VALUES 785.Rv -std 786.Sh ERRORS --- 81 unchanged lines hidden --- |