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| author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2022-12-09 23:05:54 +0100 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-12-10 19:36:05 +0100 |
| commit | d358dfe60b7724ad0acb8cf8375a608b983e2b59 (patch) | |
| tree | 721cb686ce6091bd40f88bd0654e337d932ada0d /Documentation/trace | |
| parent | tracing/osnoise: Add preempt and/or irq disabled options (diff) | |
| download | linux-d358dfe60b7724ad0acb8cf8375a608b983e2b59.tar.xz linux-d358dfe60b7724ad0acb8cf8375a608b983e2b59.zip | |
Documentation/osnoise: Add osnoise/options documentation
Add the documentation about the osnoise/options file, the options,
and some additional explanation about the OSNOISE_WORKLOAD option.
Link: https://lkml.kernel.org/r/fde5567a4bae364f67fd1e9a644d1d62862618a6.1670623111.git.bristot@kernel.org
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/osnoise-tracer.rst | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/Documentation/trace/osnoise-tracer.rst b/Documentation/trace/osnoise-tracer.rst index fdd562d7c22d..140ef2533d26 100644 --- a/Documentation/trace/osnoise-tracer.rst +++ b/Documentation/trace/osnoise-tracer.rst @@ -92,8 +92,8 @@ Note that the example above shows a high number of HW noise samples. The reason being is that this sample was taken on a virtual machine, and the host interference is detected as a hardware interference. -Tracer options ---------------------- +Tracer Configuration +-------------------- The tracer has a set of options inside the osnoise directory, they are: @@ -115,6 +115,22 @@ The tracer has a set of options inside the osnoise directory, they are: NO_OSNOISE_WORKLOAD disables the OSNOISE_WORKLOAD option. The special DEAFAULTS option resets all options to the default value. +Tracer Options +-------------- + +The osnoise/options file exposes a set of on/off configuration options for +the osnoise tracer. These options are: + + - DEFAULTS: reset the options to the default value. + - OSNOISE_WORKLOAD: do not dispatch osnoise workload (see dedicated + section below). + - PANIC_ON_STOP: call panic() if the tracer stops. This option serves to + capture a vmcore. + - OSNOISE_PREEMPT_DISABLE: disable preemption while running the osnoise + workload, allowing only IRQ and hardware-related noise. + - OSNOISE_IRQ_DISABLE: disable IRQs while running the osnoise workload, + allowing only NMIs and hardware-related noise, like hwlat tracer. + Additional Tracing ------------------ |