Merge "trace/irq: Add trace point to track IRQs disable callers" (c33140a9) · Commits · e / devices / android_kernel_oneplus_sm8150

include/linux/sched/sysctl.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,7 @@ walt_proc_update_handler(struct ctl_table *table, int write,
		#if defined(CONFIG_DEBUG_PREEMPT) \|\| defined(CONFIG_PREEMPT_TRACER) \|\| \
		defined(CONFIG_PREEMPTIRQ_EVENTS)
		extern unsigned int sysctl_preemptoff_tracing_threshold_ns;
		extern unsigned int sysctl_irqsoff_tracing_threshold_ns;

		#endif

include/trace/events/preemptirq.h

+28 −0

Original line number	Diff line number	Diff line
		@@ -52,6 +52,34 @@ DEFINE_EVENT(preemptirq_template, preempt_enable,
		TP_ARGS(ip, parent_ip));
		#endif

		TRACE_EVENT(irqs_disable,

		TP_PROTO(u64 delta, unsigned long caddr0, unsigned long caddr1,
		unsigned long caddr2, unsigned long caddr3),

		TP_ARGS(delta, caddr0, caddr1, caddr2, caddr3),

		TP_STRUCT__entry(
		__field(u64, delta)
		__field(void*, caddr0)
		__field(void*, caddr1)
		__field(void*, caddr2)
		__field(void*, caddr3)
		),

		TP_fast_assign(
		__entry->delta = delta;
		__entry->caddr0 = (void *)caddr0;
		__entry->caddr1 = (void *)caddr1;
		__entry->caddr2 = (void *)caddr2;
		__entry->caddr3 = (void *)caddr3;
		),

		TP_printk("delta=%llu(ns) Callers:(%pf<-%pf<-%pf<-%pf)", __entry->delta,
		__entry->caddr0, __entry->caddr1,
		__entry->caddr2, __entry->caddr3)
		);

		#endif /* _TRACE_PREEMPTIRQ_H */

		#include <trace/define_trace.h>

kernel/sysctl.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -319,6 +319,13 @@ static struct ctl_table kern_table[] = {
		.mode = 0644,
		.proc_handler = proc_dointvec,
		},
		{
		.procname = "irqsoff_tracing_threshold_ns",
		.data = &sysctl_irqsoff_tracing_threshold_ns,
		.maxlen = sizeof(unsigned int),
		.mode = 0644,
		.proc_handler = proc_dointvec,
		},
		#endif
		#ifdef CONFIG_SCHED_WALT
		{

kernel/trace/trace_irqsoff.c

+44 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,8 @@
		#include <linux/uaccess.h>
		#include <linux/module.h>
		#include <linux/ftrace.h>
		#include <linux/sched/clock.h>
		#include <linux/sched/sysctl.h>

		#include "trace.h"

		@@ -39,6 +41,12 @@ static int save_flags;
		static void stop_irqsoff_tracer(struct trace_array *tr, int graph);
		static int start_irqsoff_tracer(struct trace_array *tr, int graph);

		/*
		* irqsoff stack tracing threshold in ns.
		* default: 1ms
		*/
		unsigned int sysctl_irqsoff_tracing_threshold_ns = 1000000UL;

		#ifdef CONFIG_PREEMPT_TRACER
		static inline int
		preempt_trace(void)
		@@ -466,17 +474,53 @@ void time_hardirqs_off(unsigned long a0, unsigned long a1)

		#else /* !CONFIG_PROVE_LOCKING */

		#ifdef CONFIG_PREEMPTIRQ_EVENTS
		struct irqsoff_store {
		u64 ts;
		unsigned long caddr[4];
		};

		DEFINE_PER_CPU(struct irqsoff_store, the_irqsoff);
		#endif /* CONFIG_PREEMPTIRQ_EVENTS */

		/*
		* We are only interested in hardirq on/off events:
		*/
		static inline void tracer_hardirqs_on(void)
		{
		#ifdef CONFIG_PREEMPTIRQ_EVENTS
		struct irqsoff_store *is = &per_cpu(the_irqsoff,
		raw_smp_processor_id());

		if (!is->ts) {
		is->ts = sched_clock();
		is->caddr[0] = CALLER_ADDR0;
		is->caddr[1] = CALLER_ADDR1;
		is->caddr[2] = CALLER_ADDR2;
		is->caddr[3] = CALLER_ADDR3;
		}
		#endif /* CONFIG_PREEMPTIRQ_EVENTS */

		if (!preempt_trace() && irq_trace())
		stop_critical_timing(CALLER_ADDR0, CALLER_ADDR1);
		}

		static inline void tracer_hardirqs_off(void)
		{
		#ifdef CONFIG_PREEMPTIRQ_EVENTS
		struct irqsoff_store *is = &per_cpu(the_irqsoff,
		raw_smp_processor_id());
		u64 delta = 0;

		if (is->ts) {
		delta = sched_clock() - is->ts;
		is->ts = 0;
		}
		if (delta > sysctl_irqsoff_tracing_threshold_ns)
		trace_irqs_disable(delta, is->caddr[0], is->caddr[1],
		is->caddr[2], is->caddr[3]);
		#endif /* CONFIG_PREEMPTIRQ_EVENTS */

		if (!preempt_trace() && irq_trace())
		start_critical_timing(CALLER_ADDR0, CALLER_ADDR1);
		}