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Allocators: Difference between revisions
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==Slab== | ==Slab== | ||
* Jeff Bonwick's [http://citeseer.ist.psu.edu/bonwick94slab.html classic 1994 creation], first published in the context of the SunOS 5.4 kernel | * Jeff Bonwick's [http://citeseer.ist.psu.edu/bonwick94slab.html classic 1994 creation], first published in the context of the SunOS 5.4 kernel | ||
* Bonwick and Adams extended slab in "[http://www.usenix.org/event/usenix01/bonwick.html Magazines and Vmem: Extending the Slab Allocator to Many CPUs and Arbitrary Resources]," from USENIX 2001. | |||
** Vmem: Fast, general backend store for slab, claimed to be "the first allocator that can satisfy allocations and frees of any size in guaranteed constant time." | |||
** Magazines: Per-CPU memory allocators and caching scheme | |||
===Linux kernel variants=== | ===Linux kernel variants=== | ||
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* SLOB ([http://article.gmane.org/gmane.linux.kernel/344062 LKML]) | * SLOB ([http://article.gmane.org/gmane.linux.kernel/344062 LKML]) | ||
* [http://www.nabble.com/Differences-between-SLUB-SLAB-SLOB-SLQB-td22818541.html Differences] between SL*Bs | * [http://www.nabble.com/Differences-between-SLUB-SLAB-SLOB-SLQB-td22818541.html Differences] between SL*Bs | ||
Revision as of 18:21, 25 October 2009
- TLSF - The Two-Level Segregate Fit allocator from the Industrial Informatics and Real-Time Systems Group
- Paper list - Check out 2008's "A constant-time dynamic storage allocator for real-time systems"
Arena
Slab
- Jeff Bonwick's classic 1994 creation, first published in the context of the SunOS 5.4 kernel
- Bonwick and Adams extended slab in "Magazines and Vmem: Extending the Slab Allocator to Many CPUs and Arbitrary Resources," from USENIX 2001.
- Vmem: Fast, general backend store for slab, claimed to be "the first allocator that can satisfy allocations and frees of any size in guaranteed constant time."
- Magazines: Per-CPU memory allocators and caching scheme
Linux kernel variants
The following data is collected from kernel 2.6.30:
- SLAB: The original. From the Kconfig help:
The regular slab allocator that is established and known to work well in all environments. It organizes cache hot objects in per cpu and per node queues.
- SLUB (Christoph Lameter, 2007) reduced the size of the slab object queue and improved scalability for many processors (LKML). From the Kconfig help:
SLUB is a slab allocator that minimizes cache line usage instead of managing queues of cached objects (SLAB approach). Per cpu caching is realized using slabs of objects instead of queues of objects. SLUB can use memory efficiently and has enhanced diagnostics. SLUB is the default choice for a slab allocator.
- SLQB (Nick Piggin, 2008)
- SLOB (LKML)
- Differences between SL*Bs
