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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2015-06-30 11:06:03 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-07-04 10:04:31 +0200 |
| commit | 5968cecedd7a09f23e9fcb5f9fb4e893712f35ba (patch) | |
| tree | ecc681414550f43744fcf78640979e948c78380d /fs/proc/base.c | |
| parent | sched/stat: Simplify the sched_info accounting dependency (diff) | |
| download | linux-5968cecedd7a09f23e9fcb5f9fb4e893712f35ba.tar.xz linux-5968cecedd7a09f23e9fcb5f9fb4e893712f35ba.zip | |
sched/stat: Expose /proc/pid/schedstat if CONFIG_SCHED_INFO=y
Expand /proc/pid/schedstat output:
- enable it on CONFIG_TASK_DELAY_ACCT=y && !CONFIG_SCHEDSTATS kernels.
- dump all zeroes on kernels that are booted with the 'nodelayacct'
option, which boot option disables delay accounting on
CONFIG_TASK_DELAY_ACCT=y kernels.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: a.p.zijlstra@chello.nl
Cc: ricklind@us.ibm.com
Link: http://lkml.kernel.org/r/5ccbef17d4bc841084ea6e6421d4e4a23b7b806f.1435654789.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | fs/proc/base.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 286a422f440e..ad63fa3306df 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -304,14 +304,17 @@ static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns, } #endif -#ifdef CONFIG_SCHEDSTATS +#ifdef CONFIG_SCHED_INFO /* * Provides /proc/PID/schedstat */ static int proc_pid_schedstat(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { - seq_printf(m, "%llu %llu %lu\n", + if (unlikely(!sched_info_on())) + seq_printf(m, "0 0 0\n"); + else + seq_printf(m, "%llu %llu %lu\n", (unsigned long long)task->se.sum_exec_runtime, (unsigned long long)task->sched_info.run_delay, task->sched_info.pcount); @@ -2600,7 +2603,7 @@ static const struct pid_entry tgid_base_stuff[] = { #ifdef CONFIG_STACKTRACE ONE("stack", S_IRUSR, proc_pid_stack), #endif -#ifdef CONFIG_SCHEDSTATS +#ifdef CONFIG_SCHED_INFO ONE("schedstat", S_IRUGO, proc_pid_schedstat), #endif #ifdef CONFIG_LATENCYTOP @@ -2948,7 +2951,7 @@ static const struct pid_entry tid_base_stuff[] = { #ifdef CONFIG_STACKTRACE ONE("stack", S_IRUSR, proc_pid_stack), #endif -#ifdef CONFIG_SCHEDSTATS +#ifdef CONFIG_SCHED_INFO ONE("schedstat", S_IRUGO, proc_pid_schedstat), #endif #ifdef CONFIG_LATENCYTOP |