Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * kernel/time/sched_debug.c

 *

 * Print the CFS rbtree

 *

 * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#include <linux/proc_fs.h>

#include <linux/sched.h>

#include <linux/seq_file.h>

#include <linux/kallsyms.h>

#include <linux/utsname.h>

/*

 * This allows printing both to /proc/sched_debug and

 * to the console

 */

#define SEQ_printf(m, x...)                     \

 do {                                           \

        if (m)                                  \

                seq_printf(m, x);               \

        else                                    \

                printk(x);                      \

 } while (0)

/*

 * Ease the printing of nsec fields:

 */

static long long nsec_high(unsigned long long nsec)

{

        if ((long long)nsec < 0) {

                nsec = -nsec;

                do_div(nsec, 1000000);

                return -nsec;

        }

        do_div(nsec, 1000000);

        return nsec;

}

static unsigned long nsec_low(unsigned long long nsec)

{

        if ((long long)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)

{

        if (rq->curr == p)

                SEQ_printf(m, "R");

        else

                SEQ_printf(m, " ");

        SEQ_printf(m, "%15s %5d %9Ld.%06ld %9Ld %5d ",

                p->comm, p->pid,

                SPLIT_NS(p->se.vruntime),

                (long long)(p->nvcsw + p->nivcsw),

                p->prio);

#ifdef CONFIG_SCHEDSTATS

        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.%06ld %15Ld.%06ld %15Ld.%06ld\n",

                0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);

#endif

}

static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)

{

        struct task_struct *g, *p;

        unsigned long flags;

        SEQ_printf(m,

        "\nrunnable tasks:\n"

        "            task   PID         tree-key  switches  prio"

        "     exec-runtime         sum-exec        sum-sleep\n"

        "------------------------------------------------------"

        "----------------------------------------------------\n");

        read_lock_irqsave(&tasklist_lock, flags);

        do_each_thread(g, p) {

                if (!p->se.on_rq || task_cpu(p) != rq_cpu)

                        continue;

                print_task(m, rq, p);

        } while_each_thread(g, p);

        read_unlock_irqrestore(&tasklist_lock, flags);

}

void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)

{

        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;

        SEQ_printf(m, "\ncfs_rq\n");

        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)

                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: %d\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)

{

        struct rq *rq = &per_cpu(runqueues, cpu);

#ifdef CONFIG_X86

        {

                unsigned int freq = cpu_khz ? : 1;

                SEQ_printf(m, "\ncpu#%d, %u.%03u MHz\n",

                           cpu, freq / 1000, (freq % 1000));

        }

#else

        SEQ_printf(m, "\ncpu#%d\n", cpu);

#endif

#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->load.weight);

        P(nr_switches);

        P(nr_load_updates);

        P(nr_uninterruptible);

        SEQ_printf(m, "  .%-30s: %lu\n", "jiffies", jiffies);

        PN(next_balance);

        P(curr->pid);

        PN(clock);

        PN(idle_clock);

        PN(prev_clock_raw);

        P(clock_warps);

        P(clock_overflows);

        P(clock_deep_idle_events);

        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);

        print_rq(m, rq, cpu);

}

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: v0.07, %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(sysctl_sched_latency);

        PN(sysctl_sched_min_granularity);

        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);

        SEQ_printf(m, "\n");

        return 0;

}

static void sysrq_sched_debug_show(void)

{

        sched_debug_show(NULL, NULL);

}

static int sched_debug_open(struct inode *inode, struct file *filp)

{

        return single_open(filp, sched_debug_show, NULL);

}

static const struct file_operations sched_debug_fops = {

        .open           = sched_debug_open,

        .read           = seq_read,

        .llseek         = seq_lseek,

        .release        = single_release,

};

static int __init init_sched_debug_procfs(void)

{

        struct proc_dir_entry *pe;

        pe = create_proc_entry("sched_debug", 0644, NULL);

        if (!pe)

                return -ENOMEM;

        pe->proc_fops = &sched_debug_fops;

        return 0;

}

__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;

        rcu_read_lock();

        if (lock_task_sighand(p, &flags)) {

                num_threads = atomic_read(&p->signal->count);

                unlock_task_sighand(p, &flags);

        }

        rcu_read_unlock();

        SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, p->pid, num_threads);

        SEQ_printf(m,

                "---------------------------------------------------------\n");

#define __P(F) \

        SEQ_printf(m, "%-35s:%21Ld\n", #F, (long long)F)

#define 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))

        PN(se.exec_start);

        PN(se.vruntime);

        PN(se.sum_exec_runtime);

        nr_switches = p->nvcsw + p->nivcsw;

#ifdef CONFIG_SCHEDSTATS

        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

        __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, "%-35s:%21Ld\n",

                           "clock-delta", (long long)(t1-t0));

        }

}

void proc_sched_set_task(struct task_struct *p)

{

#ifdef CONFIG_SCHEDSTATS

        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->nvcsw                                = 0;

        p->nivcsw                               = 0;

}