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| author | Bharata B Rao <bharata@linux.vnet.ibm.com> | 2011-01-11 15:41:54 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-18 15:09:39 +0100 |
| commit | efe25c2c7b3a5d17b0c70987a758d8fe7af8e3d1 (patch) | |
| tree | d2b5f98c6734f289c51985d5af67967cd8f4ef66 /kernel/sched_debug.c | |
| parent | 977dda7c9b540f48b228174346d8b31542c1e99f (diff) | |
| download | lwn-efe25c2c7b3a5d17b0c70987a758d8fe7af8e3d1.tar.gz lwn-efe25c2c7b3a5d17b0c70987a758d8fe7af8e3d1.zip | |
sched: Reinstate group names in /proc/sched_debug
Displaying of group names in /proc/sched_debug was dropped in autogroup
patches. Add group names while displaying cfs_rq and tasks information.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20110111101153.GE4772@in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_debug.c')
| -rw-r--r-- | kernel/sched_debug.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c index 1dfae3d014b5..4d36f3726da7 100644 --- a/kernel/sched_debug.c +++ b/kernel/sched_debug.c @@ -16,6 +16,8 @@ #include <linux/kallsyms.h> #include <linux/utsname.h> +static DEFINE_SPINLOCK(sched_debug_lock); + /* * This allows printing both to /proc/sched_debug and * to the console @@ -86,6 +88,23 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group } #endif +#ifdef CONFIG_CGROUP_SCHED +static char group_path[PATH_MAX]; + +static char *task_group_path(struct task_group *tg) +{ + /* + * May be NULL if the underlying cgroup isn't fully-created yet + */ + if (!tg->css.cgroup) { + group_path[0] = '\0'; + return group_path; + } + cgroup_path(tg->css.cgroup, group_path, PATH_MAX); + return group_path; +} +#endif + static void print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) { @@ -108,6 +127,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld", 0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L); #endif +#ifdef CONFIG_CGROUP_SCHED + SEQ_printf(m, " %s", task_group_path(task_group(p))); +#endif SEQ_printf(m, "\n"); } @@ -144,7 +166,11 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) struct sched_entity *last; unsigned long flags; +#ifdef CONFIG_FAIR_GROUP_SCHED + SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg)); +#else SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu); +#endif SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "exec_clock", SPLIT_NS(cfs_rq->exec_clock)); @@ -191,7 +217,11 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) { +#ifdef CONFIG_RT_GROUP_SCHED + SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg)); +#else SEQ_printf(m, "\nrt_rq[%d]:\n", cpu); +#endif #define P(x) \ SEQ_printf(m, " .%-30s: %Ld\n", #x, (long long)(rt_rq->x)) @@ -212,6 +242,7 @@ extern __read_mostly int sched_clock_running; static void print_cpu(struct seq_file *m, int cpu) { struct rq *rq = cpu_rq(cpu); + unsigned long flags; #ifdef CONFIG_X86 { @@ -266,10 +297,14 @@ static void print_cpu(struct seq_file *m, int cpu) #undef P #endif + spin_lock_irqsave(&sched_debug_lock, flags); print_cfs_stats(m, cpu); print_rt_stats(m, cpu); + rcu_read_lock(); print_rq(m, rq, cpu); + rcu_read_unlock(); + spin_unlock_irqrestore(&sched_debug_lock, flags); } static const char *sched_tunable_scaling_names[] = { |