perf_iterate

Name:Iterate all events that need to receive side-band events.* For new callers; ensure that account_pmu_sb_event() includes* your event, otherwise it might not get delivered.

Proto:static void perf_iterate_sb(perf_iterate_f output, void *data, struct perf_event_context *task_ctx)

Type:void

Parameter:

Type	Parameter	Name
perf_iterate_f	output
void *	data
struct perf_event_context *	task_ctx

7084

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

7085

Even if we don't have any preemption, we need preempt disable/enable* to be barriers, so that we don't have things like get_user/put_user* that can cause faults and scheduling migrate into our preempt-protected* region.()

7092

If task_ctx Then

7093

perf_iterate_ctx(task_ctx, output, data, false)

7094

Go to done

7097

perf_iterate_sb_cpu(output, data)

7100

ctx = fetch RCU-protected pointer for dereferencing(perf_event_ctxp[ctxn])

7101

If ctx Then perf_iterate_ctx(ctx, output, data, false)

7104

done :

7105

preempt_enable()

7106

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

**Caller**
Name	Describe
perf_event_task
perf_event_comm_event
perf_event_namespaces
perf_event_mmap_event
perf_event_switch
perf_event_ksymbol
perf_event_bpf_event

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