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sunrpc: new tracepoints around svc thread wakeups

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Convert the svc_wake_up tracepoint into svc_pool_thread_event class.
Have it also record the pool id, and add new tracepoints for when the
thread is already running and for when there are no idle threads.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2025-05-27 20:12:48 -04:00 • committed by Chuck Lever
parent 1aa3f767e0
commit f26c930530
2 changed files with 22 additions and 7 deletions
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23
include/trace/events/sunrpc.h
View file

@ -2123,22 +2123,35 @@ TRACE_EVENT(svc_xprt_accept,
)
);
TRACE_EVENT(svc_wake_up,
TP_PROTO(int pid),
DECLARE_EVENT_CLASS(svc_pool_thread_event,
TP_PROTO(const struct svc_pool *pool, pid_t pid),
TP_ARGS(pid),
TP_ARGS(pool, pid),
TP_STRUCT__entry(
__field(int, pid)
__field(unsigned int, pool_id)
__field(pid_t, pid)
),
TP_fast_assign(
__entry->pool_id = pool->sp_id;
__entry->pid = pid;
),
TP_printk("pid=%d", __entry->pid)
TP_printk("pool=%u pid=%d", __entry->pool_id, __entry->pid)
);
#define DEFINE_SVC_POOL_THREAD_EVENT(name) \
DEFINE_EVENT(svc_pool_thread_event, svc_pool_thread_##name, \
TP_PROTO( \
const struct svc_pool *pool, pid_t pid \
), \
TP_ARGS(pool, pid))
DEFINE_SVC_POOL_THREAD_EVENT(wake);
DEFINE_SVC_POOL_THREAD_EVENT(running);
DEFINE_SVC_POOL_THREAD_EVENT(noidle);
TRACE_EVENT(svc_alloc_arg_err,
TP_PROTO(
unsigned int requested,

6
net/sunrpc/svc.c
View file

@ -751,14 +751,16 @@ void svc_pool_wake_idle_thread(struct svc_pool *pool)
WRITE_ONCE(rqstp->rq_qtime, ktime_get());
if (!task_is_running(rqstp->rq_task)) {
wake_up_process(rqstp->rq_task);
trace_svc_wake_up(rqstp->rq_task->pid);
trace_svc_pool_thread_wake(pool, rqstp->rq_task->pid);
percpu_counter_inc(&pool->sp_threads_woken);
} else {
trace_svc_pool_thread_running(pool, rqstp->rq_task->pid);
}
rcu_read_unlock();
return;
}
rcu_read_unlock();
trace_svc_pool_thread_noidle(pool, 0);
}
EXPORT_SYMBOL_GPL(svc_pool_wake_idle_thread);