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| author |   Paul E. McKenney <paulmck@kernel.org> | 2023-05-17 05:01:28 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-07-14 15:01:49 -0700 |
| commit | 5f8e3202696f5e94d3fc54cfed75d270ae843ee9 (patch) | |
| tree | a902e3236e84fa24cc07c15b26196d4635adbf58 /include/linux/rcupdate_trace.h | |
| parent | rcuscale: Print out full set of kfree_rcu parameters (diff) | |
| download | wireguard-linux-5f8e3202696f5e94d3fc54cfed75d270ae843ee9.tar.xz wireguard-linux-5f8e3202696f5e94d3fc54cfed75d270ae843ee9.zip | |
rcuscale: Measure grace-period kthread CPU time
This commit adds the ability to output the CPU time consumed by the
grace-period kthread for the RCU variant under test. 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 feedback from Stephen Rothwell and kernel test robot. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Tested-by: Yujie Liu <yujie.liu@intel.com>
Diffstat (limited to 'include/linux/rcupdate_trace.h')
| -rw-r--r-- | include/linux/rcupdate_trace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/rcupdate_trace.h b/include/linux/rcupdate_trace.h index 9bc8cbb33340..eda493200663 100644 --- a/include/linux/rcupdate_trace.h +++ b/include/linux/rcupdate_trace.h @@ -87,6 +87,7 @@ static inline void rcu_read_unlock_trace(void) void call_rcu_tasks_trace(struct rcu_head *rhp, rcu_callback_t func); void synchronize_rcu_tasks_trace(void); void rcu_barrier_tasks_trace(void); +struct task_struct *get_rcu_tasks_trace_gp_kthread(void); #else /* * The BPF JIT forms these addresses even when it doesn't call these |