Scheduling Latency Tracer

modulename: trace_sched_wakeup.ko

configname: CONFIG_SCHED_TRACER

Linux Kernel Configuration
└─>Scheduling Latency Tracer
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This tracer tracks the latency of the highest priority task
to be scheduled in, starting from the point it has woken up.

source code:
kernel/trace/trace_sched_wakeup.c