From: Ingo Molnar Date: Tue, 14 Oct 2008 12:27:20 +0000 (+0200) Subject: tracing/fastboot: improve help text X-Git-Tag: firefly_0821_release~17186^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=98d9c66ab07471006fd7910cb16453581c41a3e7;p=firefly-linux-kernel-4.4.55.git tracing/fastboot: improve help text Improve the help text of the boot tracer. Signed-off-by: Ingo Molnar --- diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 11fd03a429f0..1cb3e1f616af 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -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"