diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/doc/src/erts_alloc.xml | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/erts/doc/src/erts_alloc.xml b/erts/doc/src/erts_alloc.xml index f79241d692..2ffb55c6ab 100644 --- a/erts/doc/src/erts_alloc.xml +++ b/erts/doc/src/erts_alloc.xml @@ -309,6 +309,37 @@ subsystem identifier, only the specific allocator identified will be effected:</p> <taglist> + <tag><marker id="M_acul"><c><![CDATA[+M<S>acul <utilization>|de]]></c></marker></tag> + <item> + Abandon carrier utilization limit. A valid + <c><![CDATA[<utilization>]]></c> is an integer in the range + <c>[0, 100]</c> representing utilization in percent. When a + utilization value larger than zero is used, allocator instances + are allowed to abandon multiblock carriers. Currently the default + is zero. If <c>de</c> (default enabled) is passed instead of a + <c><![CDATA[<utilization>]]></c>, a recomended non zero utilization + value will be used. The actual value chosen depend on allocator + type and may be changed between ERTS versions. Carriers will be + abandoned when memory utilization in the allocator instance falls + below the utilization value used. Once a carrier has been abandoned, + no new allocations will be made in it. When an allocator instance + gets an increased multiblock carrier need, it will first try to + fetch an abandoned carrier from an allocator instances of the same + allocator type. If no abandoned carrier could be fetched, it will + create a new empty carrier. When an abandoned carrier has been + fetched it will function as an ordinary carrier. This feature has + special requirements on the + <seealso marker="#M_as">allocation strategy</seealso> used. Currently + only the <c>aoff</c> and the <c>aoffcaobf</c> strategies support + abandoned carriers. This feature also requires + <seealso marker="#M_t">multiple thread specific instances</seealso> + to be enabled. When enabling this feature, multiple thread specific + instances will be enabled if not already enabled, and the + <c>aoffcaobf</c> strategy will be enabled if current strategy does not + support abandoned carriers. This feature can be enabled on all + allocators based on the <c>alloc_util</c> framework with the + exception of <c>temp_alloc</c> (which would be pointless). + </item> <tag><marker id="M_as"><c><![CDATA[+M<S>as bf|aobf|aoff|aoffcaobf|gf|af]]></c></marker></tag> <item> Allocation strategy. Valid strategies are <c>bf</c> (best fit), |