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| author | Paul E. McKenney <paulmck@kernel.org> | 2023-06-02 23:38:44 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-07-15 00:01:49 +0200 |
| commit | 271a8467a5f7ab7654f06541d2483b5340bb7192 (patch) | |
| tree | 4566a21b09f59c3c118eade74aa0d5e1aed843a8 /kernel/rcu/tasks.h | |
| parent | rcuscale: Print grace-period kthread CPU time, if recorded (diff) | |
| download | linux-271a8467a5f7ab7654f06541d2483b5340bb7192.tar.xz linux-271a8467a5f7ab7654f06541d2483b5340bb7192.zip | |
rcuscale: Measure RCU Tasks Trace grace-period kthread CPU time
This commit causes RCU Tasks Trace to output the CPU time consumed by
its grace-period kthread. The CPU time is whatever is in the designated
task's current->stime field, and thus is controlled by whatever CPU-time
accounting scheme is in effect.
This output appears in microseconds as follows on the console:
rcu_scale: Grace-period kthread CPU time: 42367.037
[ paulmck: Apply Willy Tarreau feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/tasks.h')
| -rw-r--r-- | kernel/rcu/tasks.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index 990a6cf5fa35..0f03de023097 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -1042,6 +1042,12 @@ void show_rcu_tasks_classic_gp_kthread(void) EXPORT_SYMBOL_GPL(show_rcu_tasks_classic_gp_kthread); #endif // !defined(CONFIG_TINY_RCU) +struct task_struct *get_rcu_tasks_gp_kthread(void) +{ + return rcu_tasks.kthread_ptr; +} +EXPORT_SYMBOL_GPL(get_rcu_tasks_gp_kthread); + /* * Contribute to protect against tasklist scan blind spot while the * task is exiting and may be removed from the tasklist. See |