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Commit 5bb6b1ea authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
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sched: Add some clock info to sched_debug 



Add more clock information to /proc/sched_debug, Thomas wanted to see
the sched_clock_stable state.

Requested-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 51a96c77

kernel/sched_clock.c

+1 −1
Original line number Diff line number Diff line
@@ -79,7 +79,7 @@ unsigned long long __attribute__((weak)) sched_clock(void) 
}

EXPORT_SYMBOL_GPL(sched_clock);



static __read_mostly int sched_clock_running;

__read_mostly int sched_clock_running;



#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK

__read_mostly int sched_clock_stable;

kernel/sched_debug.c

+27 −4
Original line number Diff line number Diff line
@@ -250,6 +250,8 @@ void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) 
#undef P

}



extern __read_mostly int sched_clock_running;



static void print_cpu(struct seq_file *m, int cpu)

{

	struct rq *rq = cpu_rq(cpu);
@@ -321,21 +323,42 @@ static const char *sched_tunable_scaling_names[] = { 


static int sched_debug_show(struct seq_file *m, void *v)

{

	u64 now = ktime_to_ns(ktime_get());

	u64 ktime, sched_clk, cpu_clk;

	unsigned long flags;

	int cpu;



	SEQ_printf(m, "Sched Debug Version: v0.09, %s %.*s\n",

	local_irq_save(flags);

	ktime = ktime_to_ns(ktime_get());

	sched_clk = sched_clock();

	cpu_clk = local_clock();

	local_irq_restore(flags);



	SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",

		init_utsname()->release,

		(int)strcspn(init_utsname()->version, " "),

		init_utsname()->version);



	SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));

#define P(x) \

	SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))

#define PN(x) \

	SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))

	PN(ktime);

	PN(sched_clk);

	PN(cpu_clk);

	P(jiffies);

#ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK

	P(sched_clock_stable);

#endif

#undef PN

#undef P



	SEQ_printf(m, "\n");

	SEQ_printf(m, "sysctl_sched\n");



#define P(x) \

	SEQ_printf(m, "  .%-40s: %Ld\n", #x, (long long)(x))

#define PN(x) \

	SEQ_printf(m, "  .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))

	P(jiffies);

	PN(sysctl_sched_latency);

	PN(sysctl_sched_min_granularity);

	PN(sysctl_sched_wakeup_granularity);