CONFIG_KMEMTRACE: Trace SLAB allocations

General informations

The Linux kernel configuration item CONFIG_KMEMTRACE:

• prompt: Trace SLAB allocations
• type: bool
• depends on: (none)
• defined in kernel/trace/Kconfig
• found in Linux kernels: 2.6.30–2.6.35

Help text

kmemtrace provides tracing for slab allocator functions, such as kmalloc, kfree, kmem_cache_alloc, kmem_cache_free, etc. Collected data is then fed to the userspace application in order to analyse allocation hotspots, internal fragmentation and so on, making it possible to see how well an allocator performs, as well as debug and profile kernel code.

This requires an userspace application to use. See Documentation/trace/kmemtrace.txt for more information.

Saying Y will make the kernel somewhat larger and slower. However, if you disable kmemtrace at run-time or boot-time, the performance impact is minimal (depending on the arch the kernel is built for).

If unsure, say N.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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