a8d154b009
This patch lowers the number of places a developer must modify to add new tracepoints. The current method to add a new tracepoint into an existing system is to write the trace point macro in the trace header with one of the macros TRACE_EVENT, TRACE_FORMAT or DECLARE_TRACE, then they must add the same named item into the C file with the macro DEFINE_TRACE(name) and then add the trace point. This change cuts out the needing to add the DEFINE_TRACE(name). Every file that uses the tracepoint must still include the trace/<type>.h file, but the one C file must also add a define before the including of that file. #define CREATE_TRACE_POINTS #include <trace/mytrace.h> This will cause the trace/mytrace.h file to also produce the C code necessary to implement the trace point. Note, if more than one trace/<type>.h is used to create the C code it is best to list them all together. #define CREATE_TRACE_POINTS #include <trace/foo.h> #include <trace/bar.h> #include <trace/fido.h> Thanks to Mathieu Desnoyers and Christoph Hellwig for coming up with the cleaner solution of the define above the includes over my first design to have the C code include a "special" header. This patch converts sched, irq and lockdep and skb to use this new method. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Zhao Lei <zhaolei@cn.fujitsu.com> Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
340 lines
6.9 KiB
C
340 lines
6.9 KiB
C
#if !defined(_TRACE_SCHED_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_SCHED_H
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/tracepoint.h>
|
|
|
|
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM sched
|
|
|
|
/*
|
|
* Tracepoint for calling kthread_stop, performed to end a kthread:
|
|
*/
|
|
TRACE_EVENT(sched_kthread_stop,
|
|
|
|
TP_PROTO(struct task_struct *t),
|
|
|
|
TP_ARGS(t),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, t->comm, TASK_COMM_LEN);
|
|
__entry->pid = t->pid;
|
|
),
|
|
|
|
TP_printk("task %s:%d", __entry->comm, __entry->pid)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for the return value of the kthread stopping:
|
|
*/
|
|
TRACE_EVENT(sched_kthread_stop_ret,
|
|
|
|
TP_PROTO(int ret),
|
|
|
|
TP_ARGS(ret),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( int, ret )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->ret = ret;
|
|
),
|
|
|
|
TP_printk("ret %d", __entry->ret)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for waiting on task to unschedule:
|
|
*
|
|
* (NOTE: the 'rq' argument is not used by generic trace events,
|
|
* but used by the latency tracer plugin. )
|
|
*/
|
|
TRACE_EVENT(sched_wait_task,
|
|
|
|
TP_PROTO(struct rq *rq, struct task_struct *p),
|
|
|
|
TP_ARGS(rq, p),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
__field( int, prio )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
|
|
__entry->pid = p->pid;
|
|
__entry->prio = p->prio;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d]",
|
|
__entry->comm, __entry->pid, __entry->prio)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for waking up a task:
|
|
*
|
|
* (NOTE: the 'rq' argument is not used by generic trace events,
|
|
* but used by the latency tracer plugin. )
|
|
*/
|
|
TRACE_EVENT(sched_wakeup,
|
|
|
|
TP_PROTO(struct rq *rq, struct task_struct *p, int success),
|
|
|
|
TP_ARGS(rq, p, success),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
__field( int, prio )
|
|
__field( int, success )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
|
|
__entry->pid = p->pid;
|
|
__entry->prio = p->prio;
|
|
__entry->success = success;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d] success=%d",
|
|
__entry->comm, __entry->pid, __entry->prio,
|
|
__entry->success)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for waking up a new task:
|
|
*
|
|
* (NOTE: the 'rq' argument is not used by generic trace events,
|
|
* but used by the latency tracer plugin. )
|
|
*/
|
|
TRACE_EVENT(sched_wakeup_new,
|
|
|
|
TP_PROTO(struct rq *rq, struct task_struct *p, int success),
|
|
|
|
TP_ARGS(rq, p, success),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
__field( int, prio )
|
|
__field( int, success )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
|
|
__entry->pid = p->pid;
|
|
__entry->prio = p->prio;
|
|
__entry->success = success;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d] success=%d",
|
|
__entry->comm, __entry->pid, __entry->prio,
|
|
__entry->success)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for task switches, performed by the scheduler:
|
|
*
|
|
* (NOTE: the 'rq' argument is not used by generic trace events,
|
|
* but used by the latency tracer plugin. )
|
|
*/
|
|
TRACE_EVENT(sched_switch,
|
|
|
|
TP_PROTO(struct rq *rq, struct task_struct *prev,
|
|
struct task_struct *next),
|
|
|
|
TP_ARGS(rq, prev, next),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, prev_comm, TASK_COMM_LEN )
|
|
__field( pid_t, prev_pid )
|
|
__field( int, prev_prio )
|
|
__array( char, next_comm, TASK_COMM_LEN )
|
|
__field( pid_t, next_pid )
|
|
__field( int, next_prio )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->next_comm, next->comm, TASK_COMM_LEN);
|
|
__entry->prev_pid = prev->pid;
|
|
__entry->prev_prio = prev->prio;
|
|
memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN);
|
|
__entry->next_pid = next->pid;
|
|
__entry->next_prio = next->prio;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d] ==> %s:%d [%d]",
|
|
__entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
|
|
__entry->next_comm, __entry->next_pid, __entry->next_prio)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for a task being migrated:
|
|
*/
|
|
TRACE_EVENT(sched_migrate_task,
|
|
|
|
TP_PROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
|
|
|
|
TP_ARGS(p, orig_cpu, dest_cpu),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
__field( int, prio )
|
|
__field( int, orig_cpu )
|
|
__field( int, dest_cpu )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
|
|
__entry->pid = p->pid;
|
|
__entry->prio = p->prio;
|
|
__entry->orig_cpu = orig_cpu;
|
|
__entry->dest_cpu = dest_cpu;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d] from: %d to: %d",
|
|
__entry->comm, __entry->pid, __entry->prio,
|
|
__entry->orig_cpu, __entry->dest_cpu)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for freeing a task:
|
|
*/
|
|
TRACE_EVENT(sched_process_free,
|
|
|
|
TP_PROTO(struct task_struct *p),
|
|
|
|
TP_ARGS(p),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
__field( int, prio )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
|
|
__entry->pid = p->pid;
|
|
__entry->prio = p->prio;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d]",
|
|
__entry->comm, __entry->pid, __entry->prio)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for a task exiting:
|
|
*/
|
|
TRACE_EVENT(sched_process_exit,
|
|
|
|
TP_PROTO(struct task_struct *p),
|
|
|
|
TP_ARGS(p),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
__field( int, prio )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
|
|
__entry->pid = p->pid;
|
|
__entry->prio = p->prio;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d]",
|
|
__entry->comm, __entry->pid, __entry->prio)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for a waiting task:
|
|
*/
|
|
TRACE_EVENT(sched_process_wait,
|
|
|
|
TP_PROTO(struct pid *pid),
|
|
|
|
TP_ARGS(pid),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
__field( int, prio )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
|
|
__entry->pid = pid_nr(pid);
|
|
__entry->prio = current->prio;
|
|
),
|
|
|
|
TP_printk("task %s:%d [%d]",
|
|
__entry->comm, __entry->pid, __entry->prio)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for do_fork:
|
|
*/
|
|
TRACE_EVENT(sched_process_fork,
|
|
|
|
TP_PROTO(struct task_struct *parent, struct task_struct *child),
|
|
|
|
TP_ARGS(parent, child),
|
|
|
|
TP_STRUCT__entry(
|
|
__array( char, parent_comm, TASK_COMM_LEN )
|
|
__field( pid_t, parent_pid )
|
|
__array( char, child_comm, TASK_COMM_LEN )
|
|
__field( pid_t, child_pid )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->parent_comm, parent->comm, TASK_COMM_LEN);
|
|
__entry->parent_pid = parent->pid;
|
|
memcpy(__entry->child_comm, child->comm, TASK_COMM_LEN);
|
|
__entry->child_pid = child->pid;
|
|
),
|
|
|
|
TP_printk("parent %s:%d child %s:%d",
|
|
__entry->parent_comm, __entry->parent_pid,
|
|
__entry->child_comm, __entry->child_pid)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for sending a signal:
|
|
*/
|
|
TRACE_EVENT(sched_signal_send,
|
|
|
|
TP_PROTO(int sig, struct task_struct *p),
|
|
|
|
TP_ARGS(sig, p),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( int, sig )
|
|
__array( char, comm, TASK_COMM_LEN )
|
|
__field( pid_t, pid )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
|
|
__entry->pid = p->pid;
|
|
__entry->sig = sig;
|
|
),
|
|
|
|
TP_printk("sig: %d task %s:%d",
|
|
__entry->sig, __entry->comm, __entry->pid)
|
|
);
|
|
|
|
#endif /* _TRACE_SCHED_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|