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rtla/osnoise: set the default threshold to 1us

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Change the default threshold for osnoise to 1us, so that any noise
equal or above this value is recorded. Let the user set a higher
threshold if necessary.

Link: https://lore.kernel.org/linux-trace-kernel/Zmb-QhiiiI6jM9To@uudg.org

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Suggested-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Reviewed-by: Clark Williams <williams@redhat.com>
Signed-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>
Acked-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Luis Claudio R. Goncalves 2024-06-10 10:23:14 -03:00 committed by Steven Rostedt (Google)
parent 22b639253e
commit c40583e19e
2 changed files with 3 additions and 3 deletions
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2
Documentation/trace/osnoise-tracer.rst
View File

@ -108,7 +108,7 @@ The tracer has a set of options inside the osnoise directory, they are:
option. option.
- tracing_threshold: the minimum delta between two time() reads to be - tracing_threshold: the minimum delta between two time() reads to be
considered as noise, in us. When set to 0, the default value will considered as noise, in us. When set to 0, the default value will
be used, which is currently 5 us. be used, which is currently 1 us.
- osnoise/options: a set of on/off options that can be enabled by - osnoise/options: a set of on/off options that can be enabled by
writing the option name to the file or disabled by writing the option writing the option name to the file or disabled by writing the option
name preceded with the 'NO\_' prefix. For example, writing name preceded with the 'NO\_' prefix. For example, writing

4
kernel/trace/trace_osnoise.c
View File

@ -1444,9 +1444,9 @@ static int run_osnoise(void)
save_osn_sample_stats(osn_var, &s); save_osn_sample_stats(osn_var, &s);
/* /*
* if threshold is 0, use the default value of 5 us. * if threshold is 0, use the default value of 1 us.
*/ */
threshold = tracing_thresh ? : 5000; threshold = tracing_thresh ? : 1000;
/* /*
* Apply PREEMPT and IRQ disabled options. * Apply PREEMPT and IRQ disabled options.