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sched: enhance debug output

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enhance debug output by changing 12345678 nsecs to 12.345678 output,
this is more human-readable.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2007-10-15 17:00:08 +02:00
parent 1a75b94f7b
commit ef83a5714d
1 changed files with 68 additions and 40 deletions
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108
kernel/sched_debug.c
View file

@ -28,6 +28,31 @@
printk(x); \
} while (0)
/*
* Ease the printing of nsec fields:
*/
static long long nsec_high(long long nsec)
{
if (nsec < 0) {
nsec = -nsec;
do_div(nsec, 1000000);
return -nsec;
}
do_div(nsec, 1000000);
return nsec;
}
static unsigned long nsec_low(long long nsec)
{
if (nsec < 0)
nsec = -nsec;
return do_div(nsec, 1000000);
}
#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
static void
print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
{
@ -36,19 +61,19 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
else
SEQ_printf(m, " ");
SEQ_printf(m, "%15s %5d %15Ld %13Ld %5d ",
SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
p->comm, p->pid,
(long long)p->se.vruntime,
SPLIT_NS(p->se.vruntime),
(long long)(p->nvcsw + p->nivcsw),
p->prio);
#ifdef CONFIG_SCHEDSTATS
SEQ_printf(m, "%15Ld %15Ld %15Ld\n",
(long long)p->se.vruntime,
(long long)p->se.sum_exec_runtime,
(long long)p->se.sum_sleep_runtime);
SEQ_printf(m, "%15Ld.%06ld %15Ld.%06ld %15Ld.%06ld\n",
SPLIT_NS(p->se.vruntime),
SPLIT_NS(p->se.sum_exec_runtime),
SPLIT_NS(p->se.sum_sleep_runtime));
#else
SEQ_printf(m, "%15Ld %15Ld %15Ld %15Ld %15Ld\n",
0LL, 0LL, 0LL, 0LL, 0LL);
SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld\n",
0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
#endif
}
@ -85,10 +110,8 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
SEQ_printf(m, "\ncfs_rq\n");
#define P(x) \
SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(cfs_rq->x))
P(exec_clock);
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
SPLIT_NS(cfs_rq->exec_clock));
spin_lock_irqsave(&rq->lock, flags);
if (cfs_rq->rb_leftmost)
@ -99,19 +122,18 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
min_vruntime = rq->cfs.min_vruntime;
rq0_min_vruntime = per_cpu(runqueues, 0).cfs.min_vruntime;
spin_unlock_irqrestore(&rq->lock, flags);
SEQ_printf(m, " .%-30s: %Ld\n", "MIN_vruntime",
(long long)MIN_vruntime);
SEQ_printf(m, " .%-30s: %Ld\n", "min_vruntime",
(long long)min_vruntime);
SEQ_printf(m, " .%-30s: %Ld\n", "max_vruntime",
(long long)max_vruntime);
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
SPLIT_NS(MIN_vruntime));
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
SPLIT_NS(min_vruntime));
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
SPLIT_NS(max_vruntime));
spread = max_vruntime - MIN_vruntime;
SEQ_printf(m, " .%-30s: %Ld\n", "spread",
(long long)spread);
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
SPLIT_NS(spread));
spread0 = min_vruntime - rq0_min_vruntime;
SEQ_printf(m, " .%-30s: %Ld\n", "spread0",
(long long)spread0);
#undef P
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
SPLIT_NS(spread0));
}
static void print_cpu(struct seq_file *m, int cpu)
@ -131,6 +153,8 @@ static void print_cpu(struct seq_file *m, int cpu)
#define P(x) \
SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x))
#define PN(x) \
SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
P(nr_running);
SEQ_printf(m, " .%-30s: %lu\n", "load",
@ -139,21 +163,22 @@ static void print_cpu(struct seq_file *m, int cpu)
P(nr_load_updates);
P(nr_uninterruptible);
SEQ_printf(m, " .%-30s: %lu\n", "jiffies", jiffies);
P(next_balance);
PN(next_balance);
P(curr->pid);
P(clock);
P(idle_clock);
P(prev_clock_raw);
PN(clock);
PN(idle_clock);
PN(prev_clock_raw);
P(clock_warps);
P(clock_overflows);
P(clock_deep_idle_events);
P(clock_max_delta);
PN(clock_max_delta);
P(cpu_load[0]);
P(cpu_load[1]);
P(cpu_load[2]);
P(cpu_load[3]);
P(cpu_load[4]);
#undef P
#undef PN
print_cfs_stats(m, cpu);
@ -170,7 +195,7 @@ static int sched_debug_show(struct seq_file *m, void *v)
(int)strcspn(init_utsname()->version, " "),
init_utsname()->version);
SEQ_printf(m, "now at %Lu nsecs\n", (unsigned long long)now);
SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));
for_each_online_cpu(cpu)
print_cpu(m, cpu);
@ -228,20 +253,22 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
SEQ_printf(m, "----------------------------------------------\n");
#define P(F) \
SEQ_printf(m, "%-25s:%20Ld\n", #F, (long long)p->F)
#define PN(F) \
SEQ_printf(m, "%-25s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
P(se.exec_start);
P(se.vruntime);
P(se.sum_exec_runtime);
PN(se.exec_start);
PN(se.vruntime);
PN(se.sum_exec_runtime);
#ifdef CONFIG_SCHEDSTATS
P(se.wait_start);
P(se.sleep_start);
P(se.block_start);
P(se.sleep_max);
P(se.block_max);
P(se.exec_max);
P(se.slice_max);
P(se.wait_max);
PN(se.wait_start);
PN(se.sleep_start);
PN(se.block_start);
PN(se.sleep_max);
PN(se.block_max);
PN(se.exec_max);
PN(se.slice_max);
PN(se.wait_max);
#endif
SEQ_printf(m, "%-25s:%20Ld\n",
"nr_switches", (long long)(p->nvcsw + p->nivcsw));
@ -249,6 +276,7 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
P(policy);
P(prio);
#undef P
#undef PN
{
u64 t0, t1;