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Update task trace document

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Nakamura, Yuuichi 2020-10-28 10:45:30 +09:00 committed by Xiang Xiao
parent 7905ee17d4
commit 08ad202dfb
2 changed files with 39 additions and 6 deletions
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26
Documentation/components/drivers/character/note.rst
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@ -180,6 +180,23 @@ Noteram Device (``/dev/note``)
The header file ``include/nuttx/note/noteram_driver.h`` provides the interface definitions of the device.
``/dev/note`` Data Structures
--------------------------------
.. c:struct:: noteram_get_taskname_s
.. code-block:: c
struct noteram_get_taskname_s
{
pid_t pid;
char taskname[CONFIG_TASK_NAME_SIZE + 1];
};
- ``pid`` : Task ID to get the task name.
- ``taskname`` : The task name string corresponding to given pid.
``/dev/note`` Ioctls
--------------------
@ -222,6 +239,15 @@ Noteram Device (``/dev/note``)
:return: If success, 0 (``OK``) is returned and the given overwriter mode is set as the current settings.
If failed, a negated ``errno`` is returned.
.. c:macro:: NOTERAM_GETTASKNAME
Get task name string
:argument: A writable pointer to :c:struct:`noteram_get_taskname_s`
:return: If success, 0 (``OK``) is returned and the task name corresponding to given pid is stored into the given pointer.
If failed, a negated ``errno`` is returned.
Filter control APIs
===================

19
Documentation/guides/tasktraceuser.rst
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@ -43,20 +43,27 @@ The following configurations are configurable parameters for trace.
- Bit 2 = Enable IRQ instrumentation
- Bit 3 = Enable collecting syscall arguments
- ``CONFIG_SCHED_INSTRUMENTATION_NOTERAM_BUFSIZE``
- ``CONFIG_SCHED_INSTRUMENTATION_HIRES``
- If enabled, use higher resolution system timer for instrumentation.
- ``CONFIG_DRIVER_NOTERAM_BUFSIZE``
- Specify the note buffer size in bytes.
Higher value can hold more note records, but consumes more kernel memory.
- ``CONFIG_SCHED_INSTRUMENTATION_NOTERAM_DEFAULT_NOOVERWRITE``
- ``CONFIG_DRIVER_NOTERAM_TASKNAME_BUFSIZE``
- Specify the task name buffer size in bytes.
The buffer is used to hold the name of the task during instrumentation.
Trace dump can find and show a task name corresponding to given pid in the instrumentation data by using this buffer.
If 0 is specified, this feature is disabled and trace dump shows only the name of the newly created task.
- ``CONFIG_DRIVER_NOTERAM_DEFAULT_NOOVERWRITE``
- If enabled, stop overwriting old notes in the circular buffer when the buffer is full by default.
This is useful to keep instrumentation data of the beginning of a system boot.
- ``CONFIG_SCHED_INSTRUMENTATION_HIRES``
- If enabled, use higher resolution system timer for instrumentation.
After the configuration, rebuild the NuttX kernel and application.
If the trace function is enabled, "``trace``" :doc:`../applications/nsh/builtin` will be available.