Commit 98d9c66a authored by Ingo Molnar's avatar Ingo Molnar

tracing/fastboot: improve help text

Improve the help text of the boot tracer.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 4519d9e5
...@@ -127,12 +127,17 @@ config BOOT_TRACER ...@@ -127,12 +127,17 @@ config BOOT_TRACER
select TRACING select TRACING
help help
This tracer helps developers to optimize boot times: it records This tracer helps developers to optimize boot times: it records
the timings of the initcalls. Its aim is to be parsed by the the timings of the initcalls and traces key events and the identity
/scripts/bootgraph.pl tool to produce pretty graphics about of tasks that can cause boot delays, such as context-switches.
boot inefficiencies, giving a visual representation of the
delays during initcalls. Note that tracers self tests can't Its aim is to be parsed by the /scripts/bootgraph.pl tool to
be enabled if this tracer is selected since only one tracer produce pretty graphics about boot inefficiencies, giving a visual
should touch the tracing buffer at a time. 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 config STACK_TRACER
bool "Trace max stack" bool "Trace max stack"
......
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