From 10e91c5e578fb378b53b8f8e7a3e8d1e6cf6e1f5 Mon Sep 17 00:00:00 2001 From: Pavankumar Kondeti Date: Tue, 9 Jan 2018 11:02:30 +0530 Subject: sched: Add trace point to track preemption disable callers Add trace point to track preemption disable callers to isolate issues unrelated to scheduler and improve debug turn around time. Change-Id: If9303b7165167e8f79cd339929daf4afc31a61c4 Signed-off-by: Pavankumar Kondeti Signed-off-by: Satya Durga Srinivasu Prabhala Signed-off-by: Lingutla Chandrasekhar --- include/linux/sched/sysctl.h | 4 ++++ include/trace/events/sched.h | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+) (limited to 'include') diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index ca7c8041b894..58941b90ebe4 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -85,6 +85,10 @@ extern unsigned int sysctl_sched_short_sleep; #endif /* CONFIG_SCHED_HMP */ +#if defined(CONFIG_PREEMPT_TRACER) || defined(CONFIG_IRQSOFF_TRACER) +extern unsigned int sysctl_preemptoff_tracing_threshold_ns; +#endif + enum sched_tunable_scaling { SCHED_TUNABLESCALING_NONE, SCHED_TUNABLESCALING_LOG, diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index cc0ebe6867a5..8fd96aebfdee 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -1436,6 +1436,38 @@ TRACE_EVENT(sched_isolate, __entry->time, __entry->isolate) ); +TRACE_EVENT(sched_preempt_disable, + + TP_PROTO(u64 delta, bool irqs_disabled, + unsigned long caddr0, unsigned long caddr1, + unsigned long caddr2, unsigned long caddr3), + + TP_ARGS(delta, irqs_disabled, caddr0, caddr1, caddr2, caddr3), + + TP_STRUCT__entry( + __field(u64, delta) + __field(bool, irqs_disabled) + __field(void*, caddr0) + __field(void*, caddr1) + __field(void*, caddr2) + __field(void*, caddr3) + ), + + TP_fast_assign( + __entry->delta = delta; + __entry->irqs_disabled = irqs_disabled; + __entry->caddr0 = (void *)caddr0; + __entry->caddr1 = (void *)caddr1; + __entry->caddr2 = (void *)caddr2; + __entry->caddr3 = (void *)caddr3; + ), + + TP_printk("delta=%llu(ns) irqs_d=%d Callers:(%pf<-%pf<-%pf<-%pf)", + __entry->delta, __entry->irqs_disabled, + __entry->caddr0, __entry->caddr1, + __entry->caddr2, __entry->caddr3) +); + TRACE_EVENT(sched_contrib_scale_f, TP_PROTO(int cpu, unsigned long freq_scale_factor, -- cgit v1.2.3