diff options
| author | Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> | 2008-08-10 20:14:03 +0300 |
|---|---|---|
| committer | Pekka Enberg <penberg@cs.helsinki.fi> | 2008-12-29 15:34:01 +0200 |
| commit | b9ce08c01020eb28bfbfa6faf1c740281c5f418e (patch) | |
| tree | b42bbda9a44a9e62d952816482b340bc4b70870b /lib | |
| parent | 35995a4d815586bc968a857f7235707940a2f755 (diff) | |
kmemtrace: Core implementation.
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.
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index b0f239e443b..78d669b461d 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -803,6 +803,34 @@ config FIREWIRE_OHCI_REMOTE_DMA If unsure, say N. +config KMEMTRACE + bool "Kernel memory tracer (kmemtrace)" + depends on RELAY && DEBUG_FS && MARKERS + help + 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/vm/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. + +config KMEMTRACE_DEFAULT_ENABLED + bool "Enabled by default at boot" + depends on KMEMTRACE + help + Say Y here to enable kmemtrace at boot-time by default. Whatever + the choice, the behavior can be overridden by a kernel parameter, + as described in documentation. + menuconfig BUILD_DOCSRC bool "Build targets in Documentation/ tree" depends on HEADERS_CHECK |