| zone.9 (107032) | zone.9 (107383) |
|---|---|
| 1.\"- 2.\" Copyright (c) 2001 Dag-Erling Co�dan Sm�rgrav 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" | 1.\"- 2.\" Copyright (c) 2001 Dag-Erling Co�dan Sm�rgrav 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" |
| 26.\" $FreeBSD: head/share/man/man9/zone.9 107032 2002-11-18 01:11:58Z alfred $ | 26.\" $FreeBSD: head/share/man/man9/zone.9 107383 2002-11-29 11:39:20Z ru $ |
| 27.\" 28.Dd May 18, 2002 29.Dt ZONE 9 30.Os 31.Sh NAME 32.Nm uma_zcreate , 33.Nm uma_zalloc , 34.Nm uma_zfree , --- 61 unchanged lines hidden (view full) --- 96.Fa ctor 97and 98.Fa dtor 99arguments are callback functions that are called by 100the uma subsystem at the time of the call to 101.Fn uma_zalloc 102and 103.Fn uma_zfree | 27.\" 28.Dd May 18, 2002 29.Dt ZONE 9 30.Os 31.Sh NAME 32.Nm uma_zcreate , 33.Nm uma_zalloc , 34.Nm uma_zfree , --- 61 unchanged lines hidden (view full) --- 96.Fa ctor 97and 98.Fa dtor 99arguments are callback functions that are called by 100the uma subsystem at the time of the call to 101.Fn uma_zalloc 102and 103.Fn uma_zfree |
| 104respectively. Their purpose is to provide hooks for initializing or | 104respectively. 105Their purpose is to provide hooks for initializing or |
| 105destroying things that need to be done at the time of the allocation | 106destroying things that need to be done at the time of the allocation |
| 106or release of a resource. A good useage for the | 107or release of a resource. 108A good useage for the |
| 107.Fa ctor 108and 109.Fa dtor 110callbacks 111might be to adjust a global count of the number of objects allocated. 112.Pp 113The 114.Fa uminit 115and 116.Fa fini 117arguments are used to optimize the allocation of | 109.Fa ctor 110and 111.Fa dtor 112callbacks 113might be to adjust a global count of the number of objects allocated. 114.Pp 115The 116.Fa uminit 117and 118.Fa fini 119arguments are used to optimize the allocation of |
| 118objects from the zone. They are called by the uma subsystem whenever | 120objects from the zone. 121They are called by the uma subsystem whenever |
| 119it needs to allocate or free several items to satisfy requests or memory | 122it needs to allocate or free several items to satisfy requests or memory |
| 120pressure. A good use for the uminit and fini callbacks might be to 121initialize and destroy mutexes contained within the object. This would | 123pressure. 124A good use for the 125.Fa uminit 126and 127.Fa fini 128callbacks might be to 129initialize and destroy mutexes contained within the object. 130This would |
| 122allow one to re-use already initialized mutexes when an object is returned | 131allow one to re-use already initialized mutexes when an object is returned |
| 123from the uma subsystem's object cache. They are not called on each call 124to | 132from the uma subsystem's object cache. 133They are not called on each call to |
| 125.Fn uma_zalloc 126and 127.Fn uma_zfree 128but rather in a batch mode on several objects. 129.Pp 130To allocate an item from a zone, simply call 131.Fn uma_zalloc 132with a pointer to that zone --- 55 unchanged lines hidden --- | 134.Fn uma_zalloc 135and 136.Fn uma_zfree 137but rather in a batch mode on several objects. 138.Pp 139To allocate an item from a zone, simply call 140.Fn uma_zalloc 141with a pointer to that zone --- 55 unchanged lines hidden --- |