Commit 48365b38 authored Jun 26, 2017 by Daniel Bristot de Oliveira Committed by Ingo Molnar Jun 30, 2017

sched/debug: Expose the number of RT/DL tasks that can migrate



Add the value of the rt_rq.rt_nr_migratory and dl_rq.dl_nr_migratory
to the sched_debug output, for instance:

 rt_rq[0]:
   .rt_nr_running                 : 2
   .rt_nr_migratory               : 1     <--- Like this
   .rt_throttled                  : 0
   .rt_time                       : 828.645877
   .rt_runtime                    : 1000.000000

This is useful to debug problems related to the RT/DL schedulers.

This also fixes the format of some variables, that were unsigned, rather
than signed.

Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis Claudio R. Goncalves <lgoncalv@redhat.com>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-rt-users <linux-rt-users@vger.kernel.org>
Link: http://lkml.kernel.org/r/7896f71cada54ee7dd8507bb666063a2e051c3d4.1498482127.git.bristot@redhat.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent ff801b71

kernel/sched/debug.c

+15 −2

Original line number	Diff line number	Diff line
		@@ -552,15 +552,21 @@ void print_rt_rq(struct seq_file m, int cpu, struct rt_rq rt_rq)

		#define P(x) \
		SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x))
		#define PU(x) \
		SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(rt_rq->x))
		#define PN(x) \
		SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))

		P(rt_nr_running);
		PU(rt_nr_running);
		#ifdef CONFIG_SMP
		PU(rt_nr_migratory);
		#endif
		P(rt_throttled);
		PN(rt_time);
		PN(rt_runtime);

		#undef PN
		#undef PU
		#undef P
		}

		@@ -569,14 +575,21 @@ void print_dl_rq(struct seq_file m, int cpu, struct dl_rq dl_rq)
		struct dl_bw *dl_bw;

		SEQ_printf(m, "\ndl_rq[%d]:\n", cpu);
		SEQ_printf(m, " .%-30s: %ld\n", "dl_nr_running", dl_rq->dl_nr_running);

		#define PU(x) \
		SEQ_printf(m, " .%-30s: %lu\n", #x, (unsigned long)(dl_rq->x))

		PU(dl_nr_running);
		#ifdef CONFIG_SMP
		PU(dl_nr_migratory);
		dl_bw = &cpu_rq(cpu)->rd->dl_bw;
		#else
		dl_bw = &dl_rq->dl_bw;
		#endif
		SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->bw", dl_bw->bw);
		SEQ_printf(m, " .%-30s: %lld\n", "dl_bw->total_bw", dl_bw->total_bw);

		#undef PU
		}

		extern __read_mostly int sched_clock_running;

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