sched: enhance debug output
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
Родитель
1a75b94f7b
Коммит
ef83a5714d
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@ -28,6 +28,31 @@
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printk(x); \
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} while (0)
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/*
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* Ease the printing of nsec fields:
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*/
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static long long nsec_high(long long nsec)
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{
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if (nsec < 0) {
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nsec = -nsec;
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do_div(nsec, 1000000);
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return -nsec;
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}
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do_div(nsec, 1000000);
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return nsec;
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}
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static unsigned long nsec_low(long long nsec)
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{
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if (nsec < 0)
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nsec = -nsec;
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return do_div(nsec, 1000000);
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}
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#define SPLIT_NS(x) nsec_high(x), nsec_low(x)
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static void
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print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
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{
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@ -36,19 +61,19 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
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else
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SEQ_printf(m, " ");
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SEQ_printf(m, "%15s %5d %15Ld %13Ld %5d ",
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SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
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p->comm, p->pid,
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(long long)p->se.vruntime,
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SPLIT_NS(p->se.vruntime),
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(long long)(p->nvcsw + p->nivcsw),
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p->prio);
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#ifdef CONFIG_SCHEDSTATS
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SEQ_printf(m, "%15Ld %15Ld %15Ld\n",
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(long long)p->se.vruntime,
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(long long)p->se.sum_exec_runtime,
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(long long)p->se.sum_sleep_runtime);
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SEQ_printf(m, "%15Ld.%06ld %15Ld.%06ld %15Ld.%06ld\n",
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SPLIT_NS(p->se.vruntime),
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SPLIT_NS(p->se.sum_exec_runtime),
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SPLIT_NS(p->se.sum_sleep_runtime));
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#else
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SEQ_printf(m, "%15Ld %15Ld %15Ld %15Ld %15Ld\n",
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0LL, 0LL, 0LL, 0LL, 0LL);
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SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld\n",
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0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
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#endif
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}
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@ -85,10 +110,8 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
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SEQ_printf(m, "\ncfs_rq\n");
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#define P(x) \
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SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(cfs_rq->x))
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P(exec_clock);
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SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
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SPLIT_NS(cfs_rq->exec_clock));
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spin_lock_irqsave(&rq->lock, flags);
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if (cfs_rq->rb_leftmost)
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@ -99,19 +122,18 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
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min_vruntime = rq->cfs.min_vruntime;
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rq0_min_vruntime = per_cpu(runqueues, 0).cfs.min_vruntime;
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spin_unlock_irqrestore(&rq->lock, flags);
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SEQ_printf(m, " .%-30s: %Ld\n", "MIN_vruntime",
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(long long)MIN_vruntime);
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SEQ_printf(m, " .%-30s: %Ld\n", "min_vruntime",
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(long long)min_vruntime);
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SEQ_printf(m, " .%-30s: %Ld\n", "max_vruntime",
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(long long)max_vruntime);
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SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "MIN_vruntime",
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SPLIT_NS(MIN_vruntime));
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SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime",
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SPLIT_NS(min_vruntime));
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SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "max_vruntime",
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SPLIT_NS(max_vruntime));
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spread = max_vruntime - MIN_vruntime;
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SEQ_printf(m, " .%-30s: %Ld\n", "spread",
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(long long)spread);
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SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread",
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SPLIT_NS(spread));
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spread0 = min_vruntime - rq0_min_vruntime;
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SEQ_printf(m, " .%-30s: %Ld\n", "spread0",
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(long long)spread0);
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#undef P
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SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
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SPLIT_NS(spread0));
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}
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static void print_cpu(struct seq_file *m, int cpu)
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@ -131,6 +153,8 @@ static void print_cpu(struct seq_file *m, int cpu)
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#define P(x) \
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SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rq->x))
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#define PN(x) \
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SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
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P(nr_running);
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SEQ_printf(m, " .%-30s: %lu\n", "load",
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@ -139,21 +163,22 @@ static void print_cpu(struct seq_file *m, int cpu)
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P(nr_load_updates);
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P(nr_uninterruptible);
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SEQ_printf(m, " .%-30s: %lu\n", "jiffies", jiffies);
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P(next_balance);
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PN(next_balance);
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P(curr->pid);
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P(clock);
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P(idle_clock);
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P(prev_clock_raw);
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PN(clock);
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PN(idle_clock);
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PN(prev_clock_raw);
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P(clock_warps);
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P(clock_overflows);
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P(clock_deep_idle_events);
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P(clock_max_delta);
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PN(clock_max_delta);
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P(cpu_load[0]);
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P(cpu_load[1]);
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P(cpu_load[2]);
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P(cpu_load[3]);
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P(cpu_load[4]);
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#undef P
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#undef PN
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print_cfs_stats(m, cpu);
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@ -170,7 +195,7 @@ static int sched_debug_show(struct seq_file *m, void *v)
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(int)strcspn(init_utsname()->version, " "),
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init_utsname()->version);
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SEQ_printf(m, "now at %Lu nsecs\n", (unsigned long long)now);
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SEQ_printf(m, "now at %Lu.%06ld msecs\n", SPLIT_NS(now));
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for_each_online_cpu(cpu)
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print_cpu(m, cpu);
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@ -228,20 +253,22 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
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SEQ_printf(m, "----------------------------------------------\n");
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#define P(F) \
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SEQ_printf(m, "%-25s:%20Ld\n", #F, (long long)p->F)
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#define PN(F) \
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SEQ_printf(m, "%-25s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
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P(se.exec_start);
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P(se.vruntime);
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P(se.sum_exec_runtime);
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PN(se.exec_start);
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PN(se.vruntime);
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PN(se.sum_exec_runtime);
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#ifdef CONFIG_SCHEDSTATS
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P(se.wait_start);
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P(se.sleep_start);
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P(se.block_start);
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P(se.sleep_max);
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P(se.block_max);
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P(se.exec_max);
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P(se.slice_max);
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P(se.wait_max);
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PN(se.wait_start);
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PN(se.sleep_start);
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PN(se.block_start);
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PN(se.sleep_max);
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PN(se.block_max);
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PN(se.exec_max);
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PN(se.slice_max);
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PN(se.wait_max);
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#endif
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SEQ_printf(m, "%-25s:%20Ld\n",
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"nr_switches", (long long)(p->nvcsw + p->nivcsw));
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@ -249,6 +276,7 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
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P(policy);
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P(prio);
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#undef P
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#undef PN
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{
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u64 t0, t1;
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