[ 3948.258548] stap_a9703a75de5396a92c90967f1b6112_286435 (group.stap): systemtap: 4.8/0.188, base: ffffffffc0ad7000, memory: 76data/52text/0ctx/16486net/137alloc kb, probes: 32 [ 3948.258826] Scheduler tracepoints stat_sleep, stat_iowait, stat_blocked and stat_runtime require the kernel parameter schedstats=enable or kernel.sched_schedstats=1