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tracing/fastboot: improve help text

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Improve the help text of the boot tracer.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-10-14 14:27:20 +02:00
parent 4519d9e54d
commit 98d9c66ab0
1 changed files with 11 additions and 6 deletions
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17
kernel/trace/Kconfig
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@ -127,12 +127,17 @@ config BOOT_TRACER
select TRACING
help
This tracer helps developers to optimize boot times: it records
the timings of the initcalls. Its aim is to be parsed by the
/scripts/bootgraph.pl tool to produce pretty graphics about
boot inefficiencies, giving a visual representation of the
delays during initcalls. Note that tracers self tests can't
be enabled if this tracer is selected since only one tracer
should touch the tracing buffer at a time.
the timings of the initcalls and traces key events and the identity
of tasks that can cause boot delays, such as context-switches.
Its aim is to be parsed by the /scripts/bootgraph.pl tool to
produce pretty graphics about boot inefficiencies, giving a visual
representation of the delays during initcalls - but the raw
/debug/tracing/trace text output is readable too.
( Note that tracing self tests can't be enabled if this tracer is
selected, because the self-tests are an initcall as well and that
would invalidate the boot trace. )
config STACK_TRACER
bool "Trace max stack"