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| author | Luis Claudio R. Goncalves <lgoncalv@redhat.com> | 2024-06-10 10:23:14 -0300 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-07-01 18:54:31 -0400 |
| commit | c40583e19eebae50f6b024d8285d2703e2522364 (patch) | |
| tree | 951f7aae620ea7dc66b73420f54a4241462aea41 | |
| parent | 22b639253ec046d66c69c54b9d28bb1bd30f3a7a (diff) | |
| download | lwn-c40583e19eebae50f6b024d8285d2703e2522364.tar.gz lwn-c40583e19eebae50f6b024d8285d2703e2522364.zip | |
rtla/osnoise: set the default threshold to 1us
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>
| -rw-r--r-- | Documentation/trace/osnoise-tracer.rst | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_osnoise.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/trace/osnoise-tracer.rst b/Documentation/trace/osnoise-tracer.rst index 140ef2533d26..a520adbd3476 100644 --- a/Documentation/trace/osnoise-tracer.rst +++ b/Documentation/trace/osnoise-tracer.rst @@ -108,7 +108,7 @@ The tracer has a set of options inside the osnoise directory, they are: option. - tracing_threshold: the minimum delta between two time() reads to be 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 writing the option name to the file or disabled by writing the option name preceded with the 'NO\_' prefix. For example, writing diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index a8e28f9b9271..66a871553d4a 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -1444,9 +1444,9 @@ static int run_osnoise(void) 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. |