GSoC Project | Basic Support for Trace Compass
sebastian.huber at embedded-brains.de
Wed Jul 31 05:30:57 UTC 2019
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?
> 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:
> The API value for idle threads is 1.
> Have made changes in metadata to sync with RTEMS:
Since this enum is not defined by LTTNG, we should remove it.
> Have added the prev_state in client-side:
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
> > 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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