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-rw-r--r--kernel/sched_debug.c282
1 files changed, 194 insertions, 88 deletions
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index c3ee38bd342..a5e517ec07c 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -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)
{
@@ -36,23 +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 %13Ld %9Ld %5d ",
+ SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",
p->comm, p->pid,
- (long long)p->se.fair_key,
- (long long)(p->se.fair_key - rq->cfs.fair_clock),
- (long long)p->se.wait_runtime,
+ SPLIT_NS(p->se.vruntime),
(long long)(p->nvcsw + p->nivcsw),
p->prio);
#ifdef CONFIG_SCHEDSTATS
- SEQ_printf(m, "%15Ld %15Ld %15Ld %15Ld %15Ld\n",
- (long long)p->se.sum_exec_runtime,
- (long long)p->se.sum_wait_runtime,
- (long long)p->se.sum_sleep_runtime,
- (long long)p->se.wait_runtime_overruns,
- (long long)p->se.wait_runtime_underruns);
+ SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%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
}
@@ -62,14 +83,10 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
SEQ_printf(m,
"\nrunnable tasks:\n"
- " task PID tree-key delta waiting"
- " switches prio"
- " sum-exec sum-wait sum-sleep"
- " wait-overrun wait-underrun\n"
- "------------------------------------------------------------------"
- "----------------"
- "------------------------------------------------"
- "--------------------------------\n");
+ " task PID tree-key switches prio"
+ " exec-runtime sum-exec sum-sleep\n"
+ "------------------------------------------------------"
+ "----------------------------------------------------\n");
read_lock_irq(&tasklist_lock);
@@ -83,45 +100,48 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
read_unlock_irq(&tasklist_lock);
}
-static void
-print_cfs_rq_runtime_sum(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
+void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
{
- s64 wait_runtime_rq_sum = 0;
- struct task_struct *p;
- struct rb_node *curr;
- unsigned long flags;
+ s64 MIN_vruntime = -1, min_vruntime, max_vruntime = -1,
+ spread, rq0_min_vruntime, spread0;
struct rq *rq = &per_cpu(runqueues, cpu);
+ struct sched_entity *last;
+ unsigned long flags;
- spin_lock_irqsave(&rq->lock, flags);
- curr = first_fair(cfs_rq);
- while (curr) {
- p = rb_entry(curr, struct task_struct, se.run_node);
- wait_runtime_rq_sum += p->se.wait_runtime;
-
- curr = rb_next(curr);
- }
- spin_unlock_irqrestore(&rq->lock, flags);
-
- SEQ_printf(m, " .%-30s: %Ld\n", "wait_runtime_rq_sum",
- (long long)wait_runtime_rq_sum);
-}
-
-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(fair_clock);
- P(exec_clock);
- P(wait_runtime);
- P(wait_runtime_overruns);
- P(wait_runtime_underruns);
- P(sleeper_bonus);
-#undef P
+ SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock",
+ SPLIT_NS(cfs_rq->exec_clock));
- print_cfs_rq_runtime_sum(m, cpu, cfs_rq);
+ spin_lock_irqsave(&rq->lock, flags);
+ if (cfs_rq->rb_leftmost)
+ MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
+ last = __pick_last_entity(cfs_rq);
+ if (last)
+ max_vruntime = last->vruntime;
+ 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.%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.%06ld\n", "spread",
+ SPLIT_NS(spread));
+ spread0 = min_vruntime - rq0_min_vruntime;
+ SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "spread0",
+ SPLIT_NS(spread0));
+ SEQ_printf(m, " .%-30s: %ld\n", "nr_running", cfs_rq->nr_running);
+ SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
+#ifdef CONFIG_SCHEDSTATS
+ SEQ_printf(m, " .%-30s: %ld\n", "bkl_count",
+ rq->bkl_count);
+#endif
+ SEQ_printf(m, " .%-30s: %ld\n", "nr_spread_over",
+ cfs_rq->nr_spread_over);
}
static void print_cpu(struct seq_file *m, int cpu)
@@ -141,31 +161,32 @@ 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",
- rq->ls.load.weight);
- P(ls.delta_fair);
- P(ls.delta_exec);
+ rq->load.weight);
P(nr_switches);
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);
@@ -177,12 +198,25 @@ static int sched_debug_show(struct seq_file *m, void *v)
u64 now = ktime_to_ns(ktime_get());
int cpu;
- SEQ_printf(m, "Sched Debug Version: v0.05-v20, %s %.*s\n",
+ SEQ_printf(m, "Sched Debug Version: v0.06-v22, %s %.*s\n",
init_utsname()->release,
(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));
+
+#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(sysctl_sched_latency);
+ PN(sysctl_sched_nr_latency);
+ PN(sysctl_sched_wakeup_granularity);
+ PN(sysctl_sched_batch_wakeup_granularity);
+ PN(sysctl_sched_child_runs_first);
+ P(sysctl_sched_features);
+#undef PN
+#undef P
for_each_online_cpu(cpu)
print_cpu(m, cpu);
@@ -202,7 +236,7 @@ static int sched_debug_open(struct inode *inode, struct file *filp)
return single_open(filp, sched_debug_show, NULL);
}
-static struct file_operations sched_debug_fops = {
+static const struct file_operations sched_debug_fops = {
.open = sched_debug_open,
.read = seq_read,
.llseek = seq_lseek,
@@ -226,6 +260,7 @@ __initcall(init_sched_debug_procfs);
void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
{
+ unsigned long nr_switches;
unsigned long flags;
int num_threads = 1;
@@ -237,41 +272,89 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
rcu_read_unlock();
SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid, num_threads);
- SEQ_printf(m, "----------------------------------------------\n");
+ SEQ_printf(m,
+ "---------------------------------------------------------\n");
+#define __P(F) \
+ SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)
#define P(F) \
- SEQ_printf(m, "%-25s:%20Ld\n", #F, (long long)p->F)
+ SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)p->F)
+#define __PN(F) \
+ SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
+#define PN(F) \
+ SEQ_printf(m, "%-35s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
- P(se.wait_runtime);
- P(se.wait_start_fair);
- P(se.exec_start);
- P(se.sleep_start_fair);
- P(se.sum_exec_runtime);
+ PN(se.exec_start);
+ PN(se.vruntime);
+ PN(se.sum_exec_runtime);
+
+ nr_switches = p->nvcsw + p->nivcsw;
#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.wait_max);
- P(se.wait_runtime_overruns);
- P(se.wait_runtime_underruns);
- P(se.sum_wait_runtime);
+ 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);
+ P(sched_info.bkl_count);
+ P(se.nr_migrations);
+ P(se.nr_migrations_cold);
+ P(se.nr_failed_migrations_affine);
+ P(se.nr_failed_migrations_running);
+ P(se.nr_failed_migrations_hot);
+ P(se.nr_forced_migrations);
+ P(se.nr_forced2_migrations);
+ P(se.nr_wakeups);
+ P(se.nr_wakeups_sync);
+ P(se.nr_wakeups_migrate);
+ P(se.nr_wakeups_local);
+ P(se.nr_wakeups_remote);
+ P(se.nr_wakeups_affine);
+ P(se.nr_wakeups_affine_attempts);
+ P(se.nr_wakeups_passive);
+ P(se.nr_wakeups_idle);
+
+ {
+ u64 avg_atom, avg_per_cpu;
+
+ avg_atom = p->se.sum_exec_runtime;
+ if (nr_switches)
+ do_div(avg_atom, nr_switches);
+ else
+ avg_atom = -1LL;
+
+ avg_per_cpu = p->se.sum_exec_runtime;
+ if (p->se.nr_migrations)
+ avg_per_cpu = div64_64(avg_per_cpu, p->se.nr_migrations);
+ else
+ avg_per_cpu = -1LL;
+
+ __PN(avg_atom);
+ __PN(avg_per_cpu);
+ }
#endif
- SEQ_printf(m, "%-25s:%20Ld\n",
- "nr_switches", (long long)(p->nvcsw + p->nivcsw));
+ __P(nr_switches);
+ SEQ_printf(m, "%-35s:%21Ld\n",
+ "nr_voluntary_switches", (long long)p->nvcsw);
+ SEQ_printf(m, "%-35s:%21Ld\n",
+ "nr_involuntary_switches", (long long)p->nivcsw);
+
P(se.load.weight);
P(policy);
P(prio);
+#undef PN
+#undef __PN
#undef P
+#undef __P
{
u64 t0, t1;
t0 = sched_clock();
t1 = sched_clock();
- SEQ_printf(m, "%-25s:%20Ld\n",
+ SEQ_printf(m, "%-35s:%21Ld\n",
"clock-delta", (long long)(t1-t0));
}
}
@@ -279,9 +362,32 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
void proc_sched_set_task(struct task_struct *p)
{
#ifdef CONFIG_SCHEDSTATS
- p->se.sleep_max = p->se.block_max = p->se.exec_max = p->se.wait_max = 0;
- p->se.wait_runtime_overruns = p->se.wait_runtime_underruns = 0;
+ p->se.wait_max = 0;
+ p->se.sleep_max = 0;
+ p->se.sum_sleep_runtime = 0;
+ p->se.block_max = 0;
+ p->se.exec_max = 0;
+ p->se.slice_max = 0;
+ p->se.nr_migrations = 0;
+ p->se.nr_migrations_cold = 0;
+ p->se.nr_failed_migrations_affine = 0;
+ p->se.nr_failed_migrations_running = 0;
+ p->se.nr_failed_migrations_hot = 0;
+ p->se.nr_forced_migrations = 0;
+ p->se.nr_forced2_migrations = 0;
+ p->se.nr_wakeups = 0;
+ p->se.nr_wakeups_sync = 0;
+ p->se.nr_wakeups_migrate = 0;
+ p->se.nr_wakeups_local = 0;
+ p->se.nr_wakeups_remote = 0;
+ p->se.nr_wakeups_affine = 0;
+ p->se.nr_wakeups_affine_attempts = 0;
+ p->se.nr_wakeups_passive = 0;
+ p->se.nr_wakeups_idle = 0;
+ p->sched_info.bkl_count = 0;
#endif
- p->se.sum_exec_runtime = 0;
- p->se.prev_sum_exec_runtime = 0;
+ p->se.sum_exec_runtime = 0;
+ p->se.prev_sum_exec_runtime = 0;
+ p->nvcsw = 0;
+ p->nivcsw = 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 19:55:55 +0000