创建event并跟踪，见kprobe

实现文件 trace_kprobe.c

主要参考函数为 __trace_kprobe_create

arm64的实现时通过将原指令替换为BRK指令实现。

添加 task_tick_fair event，会生成

events/kprobes/p_task_tick_fair_0

task_tick_fair的定义为

task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)

这里arg1对于与rq，arg2对应于curr，arg3对应与queued

root@kickseed:~/test# perf probe -V do_sys_open --range

Available variables at do_sys_open
        @<do_sys_open+0>
                [INV]   int     fd      @<do_sys_open+[302-307,307-346,427-657,669-690]>
                [INV]   struct filename*        tmp     @<do_sys_open+[284-293,293-348,427-657,669-690]>
                [VAL]   char*   filename        @<do_sys_open+[0-283,320-333,354-427,657-669]>
                [VAL]   int     dfd     @<do_sys_open+[0-320,320-352,352-354,354-451,657-669,685-690]>
                [VAL]   int     flags   @<do_sys_open+[0-63,63-344,354-690]>
                [VAL]   struct open_flags       op      @<do_sys_open+[0-690]>
                [VAL]   umode_t mode    @<do_sys_open+[0-350,354-620,652-690]>

root@kickseed:~/test# perf probe do_sys_open filename:string flags 'op.mode'

echo "wakeup_latency u64 lat; pid_t pid; int prio" >> /sys/kernel/debug/tracing/synthetic_eventsecho 'hist:keys=$saved_pid:saved_pid=pid:ts0=common_timestamp.usecs if comm=="time"' >> /sys/kernel/debug/tracing/events/sched/sched_waking/triggerecho 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat, $saved_pid, next_prio) if next_comm=="time"' >> /sys/kernel/debug/tracing/events/sched/sched_switch/triggerecho 'hist:keys=pid,prio,lat:sort=pid,lat' >> /sys/kernel/debug/tracing/events/synthetic/wakeup_latency/trigger

mount -t debugfs nodev /proc/sys/debug
echo schedule > /proc/sys/debug/tracingset_graph_function
echo function_graph > /proc/sys/debug/tracingcurrent_tracer
echo 3 > /proc/sys/debug/tracingmax_graph_depth
echo 1 > /proc/sys/debug/tracingtracing_on echo 'r:sched_ret schedule' >> /proc/sys/debug/tracing/kprobe_events 
echo 'p:sched_ent schedule' >> /proc/sys/debug/tracing/kprobe_events echo 'hist:keys=common_pid:ts0=common_timestamp.usecs' >> /proc/sys/debug/tracing/events/kprobes/sched_ent/triggerecho 'hist:keys=common_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmax($wakeup_lat).snapshot()' >> /proc/sys/debug/tracing/events/kprobes/sched_ret/trigger