> > > 1. Gather the information from two record events > > (RTEMS_RECORD_THREAD_SWITCH_OUT and RTEMS_RECORD_THREAD_SWITCH_IN) > with > > the same timestamp on the same CPU. > > > > A CPU can have many records events. Since RTEMS_RECORD_THREAD_SWITCH_IN > > is received after RTEMS_RECORD_THREAD_SWITCH_OUT we can just directly > > write into corresponding CPU file after receiving > > RTEMS_RECORD_THREAD_SWITCH_IN for the same timestamp. > > Yes. > > All the record handling must be done per CPU. > > > > > > > 2. Once you gathered the information of two events that meet this > > criteria, you produce exactly one LTTNG sched_switch event. > > > > Okay. So this particular lttng sched_switch will have prev_* value > > as RTEMS_RECORD_THREAD_SWITCH_OUT data and next_* value > > as RTEMS_RECORD_THREAD_SWITCH_IN. > > Yes. > Have made changes:
https://github.com/rmeena840/rtems-tools/commit/4048dfb7f5c49ba731e46946b51b12af95088109 Have a look I have made code more easy to understand. Babeltrace output: babeltrace . | head [19:16:31.180116542] (+?.?????????) Record_Item sched_switch: { cpu_id = 17 }, { prev_comm = "0a01002b", prev_tid = 167837739, prev_prio = 0, prev_state = 0, next_comm = "09010014", next_tid = 151060500, next_prio = 0 } [19:16:31.180154588] (+0.000038046) Record_Item sched_switch: { cpu_id = 17 }, { prev_comm = "09010014", prev_tid = 151060500, prev_prio = 0, prev_state = 0, next_comm = "0a01002b", next_tid = 167837739, next_prio = 0 } [19:16:31.180174232] (+0.000019644) Record_Item sched_switch: { cpu_id = 17 }, { prev_comm = "0a01002b", prev_tid = 167837739, prev_prio = 0, prev_state = 0, next_comm = "09010014", next_tid = 151060500, next_prio = 0 } [19:16:31.180223920] (+0.000049688) Record_Item sched_switch: { cpu_id = 5 }, { prev_comm = "09010015", prev_tid = 151060501, prev_prio = 0, prev_state = 0, next_comm = "0a01002b", next_tid = 167837739, next_prio = 0 } [19:16:31.180241405] (+0.000017485) Record_Item sched_switch: { cpu_id = 5 }, { prev_comm = "0a01002b", prev_tid = 167837739, prev_prio = 0, prev_state = 0, next_comm = "09010015", next_tid = 151060501, next_prio = 0 } [19:16:31.180281360] (+0.000039955) Record_Item sched_switch: { cpu_id = 5 }, { prev_comm = "09010015", prev_tid = 151060501, prev_prio = 0, prev_state = 0, next_comm = "0a01002b", next_tid = 167837739, next_prio = 0 } [19:16:31.180295428] (+0.000014068) Record_Item sched_switch: { cpu_id = 5 }, { prev_comm = "0a01002b", prev_tid = 167837739, prev_prio = 0, prev_state = 0, next_comm = "09010015", next_tid = 151060501, next_prio = 0 } [19:16:31.180348740] (+0.000053312) Record_Item sched_switch: { cpu_id = 5 }, { prev_comm = "09010015", prev_tid = 151060501, prev_prio = 0, prev_state = 0, next_comm = "0a01002b", next_tid = 167837739, next_prio = 0 } [19:16:31.180362596] (+0.000013856) Record_Item sched_switch: { cpu_id = 5 }, { prev_comm = "0a01002b", prev_tid = 167837739, prev_prio = 0, prev_state = 0, next_comm = "09010015", next_tid = 151060501, next_prio = 0 } [19:16:31.180397048] (+0.000034452) Record_Item sched_switch: { cpu_id = 5 }, { prev_comm = "09010015", prev_tid = 151060501, prev_prio = 0, prev_state = 0, next_comm = "0a01002b", next_tid = 167837739, next_prio = 0 } Both prev_* and next_* values are different. -- *Ravindra Kumar Meena*, B. Tech. Computer Science and Engineering, Indian Institute of Technology (Indian School of Mines) <https://www.iitism.ac.in/>, Dhanbad
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