On 30/07/2019 18:32, Ravindra Kumar Meena wrote:
> The next tasks are:
>
> 1. Detect if we switch to/from an idle thread. In this case
set the
> corresponding state to TASK_IDLE == 1026.
>
> I tried to work on this task. I am not sure how to detect it without
> calling pthread_*.
> Does this have to do something with rtems_task_is_suspended?
>
https://docs.rtems.org/branches/master/c-user/task_manager.html#rtems-task-is-suspended
On the host you cannot call any RTEMS functions on the target. All
information you have is in the record items. For a start, you can
identify the idle threads via the identifier API:
https://docs.rtems.org/branches/master/c-user/key_concepts.html#object-ids
The API value for idle threads is 1.
Have made changes in metadata to sync with RTEMS:
https://github.com/rmeena840/rtems-tools/commit/4bc050227dd3055af99bd73b667015a620c259d4
Since this enum is not defined by LTTNG, we should remove it.
Have added the prev_state in client-side:
https://github.com/rmeena840/rtems-tools/commit/43ae797ba3c6123cc51a6244a62912c999f69a1e
The bit field is documented in the manual. I would simplify this to:
cctx->switch_out_int[ item->cpu ].prev_state = ( ( ( item->data >> 24 )
& 0x7 ) == 1 ) ? TASK_IDLE : TASK_RUNNING;
Have a look
>
>
> 2. The program should learn the thread names corresponding to
a thread
> identifier. Build up a thread identifier to thread name map.
Use the
> map
> to emit thread names in the sched_switch event.
>
> Mapping should be like this:
> [thread_id]->[thread_name] or [thread_name]->[thread_id]?
In the RTEMS_RECORD_THREAD_SWITCH_OUT and RTEMS_RECORD_THREAD_SWITCH_IN
record events you have the thread id. So, the mapping must be
[thread_id]->[thread_name].
>
> the thread name can be obtained by:
> rtems_record_event_text( item->event )
>
>
> You can use C++ if this makes it easier for you.
>
> I will have to create separate c++ file for this.
Please convert the entire record-main.c file to C++.
Okay. I will work on it after the previous task.
Did the previous task keep you busy for 8 hours?
--
Sebastian Huber, embedded brains GmbH
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