937cdb9db7
It is useful to see the state of a task that is being switched out. This patch adds the output of the state of the previous task in the context switch event. [ Impact: see state of switched out task in context switch ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
347 lines
7.2 KiB
C
347 lines
7.2 KiB
C
#if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_SCHED_H
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#include <linux/sched.h>
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#include <linux/tracepoint.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM sched
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/*
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* Tracepoint for calling kthread_stop, performed to end a kthread:
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*/
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TRACE_EVENT(sched_kthread_stop,
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TP_PROTO(struct task_struct *t),
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TP_ARGS(t),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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),
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TP_fast_assign(
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memcpy(__entry->comm, t->comm, TASK_COMM_LEN);
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__entry->pid = t->pid;
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),
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TP_printk("task %s:%d", __entry->comm, __entry->pid)
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);
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/*
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* Tracepoint for the return value of the kthread stopping:
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*/
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TRACE_EVENT(sched_kthread_stop_ret,
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TP_PROTO(int ret),
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TP_ARGS(ret),
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TP_STRUCT__entry(
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->ret = ret;
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),
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TP_printk("ret %d", __entry->ret)
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);
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/*
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* Tracepoint for waiting on task to unschedule:
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*
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* (NOTE: the 'rq' argument is not used by generic trace events,
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* but used by the latency tracer plugin. )
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*/
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TRACE_EVENT(sched_wait_task,
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TP_PROTO(struct rq *rq, struct task_struct *p),
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TP_ARGS(rq, p),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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__field( int, prio )
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),
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TP_fast_assign(
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memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
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__entry->pid = p->pid;
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__entry->prio = p->prio;
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),
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TP_printk("task %s:%d [%d]",
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__entry->comm, __entry->pid, __entry->prio)
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);
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/*
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* Tracepoint for waking up a task:
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*
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* (NOTE: the 'rq' argument is not used by generic trace events,
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* but used by the latency tracer plugin. )
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*/
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TRACE_EVENT(sched_wakeup,
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TP_PROTO(struct rq *rq, struct task_struct *p, int success),
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TP_ARGS(rq, p, success),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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__field( int, prio )
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__field( int, success )
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),
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TP_fast_assign(
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memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
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__entry->pid = p->pid;
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__entry->prio = p->prio;
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__entry->success = success;
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),
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TP_printk("task %s:%d [%d] success=%d",
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__entry->comm, __entry->pid, __entry->prio,
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__entry->success)
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);
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/*
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* Tracepoint for waking up a new task:
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*
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* (NOTE: the 'rq' argument is not used by generic trace events,
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* but used by the latency tracer plugin. )
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*/
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TRACE_EVENT(sched_wakeup_new,
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TP_PROTO(struct rq *rq, struct task_struct *p, int success),
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TP_ARGS(rq, p, success),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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__field( int, prio )
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__field( int, success )
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),
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TP_fast_assign(
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memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
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__entry->pid = p->pid;
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__entry->prio = p->prio;
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__entry->success = success;
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),
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TP_printk("task %s:%d [%d] success=%d",
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__entry->comm, __entry->pid, __entry->prio,
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__entry->success)
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);
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/*
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* Tracepoint for task switches, performed by the scheduler:
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*
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* (NOTE: the 'rq' argument is not used by generic trace events,
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* but used by the latency tracer plugin. )
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*/
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TRACE_EVENT(sched_switch,
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TP_PROTO(struct rq *rq, struct task_struct *prev,
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struct task_struct *next),
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TP_ARGS(rq, prev, next),
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TP_STRUCT__entry(
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__array( char, prev_comm, TASK_COMM_LEN )
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__field( pid_t, prev_pid )
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__field( int, prev_prio )
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__field( long, prev_state )
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__array( char, next_comm, TASK_COMM_LEN )
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__field( pid_t, next_pid )
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__field( int, next_prio )
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),
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TP_fast_assign(
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memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
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__entry->prev_pid = prev->pid;
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__entry->prev_prio = prev->prio;
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__entry->prev_state = prev->state;
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memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
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__entry->next_pid = next->pid;
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__entry->next_prio = next->prio;
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),
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TP_printk("task %s:%d [%d] (%s) ==> %s:%d [%d]",
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__entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
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__entry->prev_state ?
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__print_flags(__entry->prev_state, "|",
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{ 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" },
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{ 16, "Z" }, { 32, "X" }, { 64, "x" },
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{ 128, "W" }) : "R",
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__entry->next_comm, __entry->next_pid, __entry->next_prio)
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);
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/*
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* Tracepoint for a task being migrated:
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*/
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TRACE_EVENT(sched_migrate_task,
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TP_PROTO(struct task_struct *p, int dest_cpu),
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TP_ARGS(p, dest_cpu),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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__field( int, prio )
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__field( int, orig_cpu )
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__field( int, dest_cpu )
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),
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TP_fast_assign(
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memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
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__entry->pid = p->pid;
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__entry->prio = p->prio;
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__entry->orig_cpu = task_cpu(p);
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__entry->dest_cpu = dest_cpu;
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),
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TP_printk("task %s:%d [%d] from: %d to: %d",
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__entry->comm, __entry->pid, __entry->prio,
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__entry->orig_cpu, __entry->dest_cpu)
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);
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/*
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* Tracepoint for freeing a task:
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*/
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TRACE_EVENT(sched_process_free,
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TP_PROTO(struct task_struct *p),
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TP_ARGS(p),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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__field( int, prio )
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),
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TP_fast_assign(
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memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
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__entry->pid = p->pid;
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__entry->prio = p->prio;
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),
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TP_printk("task %s:%d [%d]",
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__entry->comm, __entry->pid, __entry->prio)
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);
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/*
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* Tracepoint for a task exiting:
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*/
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TRACE_EVENT(sched_process_exit,
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TP_PROTO(struct task_struct *p),
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TP_ARGS(p),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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__field( int, prio )
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),
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TP_fast_assign(
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memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
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__entry->pid = p->pid;
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__entry->prio = p->prio;
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),
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TP_printk("task %s:%d [%d]",
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__entry->comm, __entry->pid, __entry->prio)
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);
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/*
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* Tracepoint for a waiting task:
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*/
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TRACE_EVENT(sched_process_wait,
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TP_PROTO(struct pid *pid),
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TP_ARGS(pid),
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TP_STRUCT__entry(
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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__field( int, prio )
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),
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TP_fast_assign(
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memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
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__entry->pid = pid_nr(pid);
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__entry->prio = current->prio;
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),
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TP_printk("task %s:%d [%d]",
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__entry->comm, __entry->pid, __entry->prio)
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);
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/*
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* Tracepoint for do_fork:
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*/
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TRACE_EVENT(sched_process_fork,
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TP_PROTO(struct task_struct *parent, struct task_struct *child),
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TP_ARGS(parent, child),
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TP_STRUCT__entry(
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__array( char, parent_comm, TASK_COMM_LEN )
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__field( pid_t, parent_pid )
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__array( char, child_comm, TASK_COMM_LEN )
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__field( pid_t, child_pid )
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),
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TP_fast_assign(
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memcpy(__entry->parent_comm, parent->comm, TASK_COMM_LEN);
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__entry->parent_pid = parent->pid;
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memcpy(__entry->child_comm, child->comm, TASK_COMM_LEN);
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__entry->child_pid = child->pid;
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),
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TP_printk("parent %s:%d child %s:%d",
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__entry->parent_comm, __entry->parent_pid,
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__entry->child_comm, __entry->child_pid)
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);
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/*
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* Tracepoint for sending a signal:
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*/
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TRACE_EVENT(sched_signal_send,
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TP_PROTO(int sig, struct task_struct *p),
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TP_ARGS(sig, p),
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TP_STRUCT__entry(
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__field( int, sig )
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__array( char, comm, TASK_COMM_LEN )
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__field( pid_t, pid )
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),
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TP_fast_assign(
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memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
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__entry->pid = p->pid;
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__entry->sig = sig;
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),
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TP_printk("sig: %d task %s:%d",
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__entry->sig, __entry->comm, __entry->pid)
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);
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#endif /* _TRACE_SCHED_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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