# tracer: irqsoff
#
# irqsoff latency trace v1.1.5 on 6.15.1-dirty
# --------------------------------------------------------------------
# latency: 208 us, #15/15, CPU#1 | (M:PREEMPT_RT VP:0, KP:0, SP:0 HP:0 #P:2)
#    -----------------
#    | task: ktimers/1-31 (uid:0 nice:0 policy:1 rt_prio:1)
#    -----------------
#  => started at: handle_softirqs.constprop.0
#  => ended at:   run_ktimerd
#
#
#                    _------=> CPU#            
#                   / _-----=> irqs-off/BH-disabled
#                  | / _----=> need-resched    
#                  || / _---=> hardirq/softirq 
#                  ||| / _--=> preempt-depth   
#                  |||| / _-=> migrate-disable 
#                  ||||| /     delay           
#  cmd     pid     |||||| time  |   caller     
#     \   /        ||||||  \    |    /       
ktimers/-31        1d.s.2    0us : handle_softirqs.constprop.0
ktimers/-31        1d.s.2    0us : irq_disable: caller=handle_softirqs.constprop.0+0x2d8/0x300 parent=0x0
ktimers/-31        1d.s.2    0us : __local_bh_enable(cnt=256, unlock=1) <-run_ktimerd
ktimers/-31        1d...2    0us : __rcu_read_unlock() <-__local_bh_enable
ktimers/-31        1d...2    1us+: rt_spin_unlock(lock=0xffff983497d17660) <-__local_bh_enable
ktimers/-31        1d...2   99us : migrate_enable() <-rt_spin_unlock
ktimers/-31        1d...1   99us : __rcu_read_unlock() <-rt_spin_unlock
ktimers/-31        1d...1   99us : migrate_enable() <-run_ktimerd
ktimers/-31        1d..11  100us!: preempt_disable: caller=run_ktimerd+0x4f/0x90 parent=run_ktimerd+0x4f/0x90
ktimers/-31        1d..1.  208us : preempt_enable: caller=run_ktimerd+0x4f/0x90 parent=run_ktimerd+0x4f/0x90
ktimers/-31        1d....  209us : irq_enable: caller=run_ktimerd+0x78/0x90 parent=0x0
ktimers/-31        1d....  209us : run_ktimerd
ktimers/-31        1d..1.  209us : preempt_disable: caller=_raw_spin_lock_irqsave+0x23/0x60 parent=0x0
ktimers/-31        1d....  209us!: tracer_hardirqs_on <-run_ktimerd
ktimers/-31        1d....  581us : <stack trace>
 => smpboot_thread_fn
 => kthread
 => ret_from_fork
 => ret_from_fork_asm