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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2010-09-30 21:26:52 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-11-29 22:01:55 -0800 |
| commit | 9e571a82f0cb205a65a0ea41657f19f22b7fabb8 (patch) | |
| tree | 64a83a06e18d0fd82af91560a2bf0947e0e3d071 /kernel/rcutiny.c | |
| parent | 24278d148316d2180be6df40e06db013d8b232b8 (diff) | |
| download | lwn-9e571a82f0cb205a65a0ea41657f19f22b7fabb8.tar.gz lwn-9e571a82f0cb205a65a0ea41657f19f22b7fabb8.zip | |
rcu: add tracing for TINY_RCU and TINY_PREEMPT_RCU
Add tracing for the tiny RCU implementations, including statistics on
boosting in the case of TINY_PREEMPT_RCU and RCU_BOOST.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutiny.c')
| -rw-r--r-- | kernel/rcutiny.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c index 93d166582cbb..034493724749 100644 --- a/kernel/rcutiny.c +++ b/kernel/rcutiny.c @@ -144,6 +144,7 @@ static void rcu_process_callbacks(struct rcu_ctrlblk *rcp) { struct rcu_head *next, *list; unsigned long flags; + RCU_TRACE(int cb_count = 0); /* If no RCU callbacks ready to invoke, just return. */ if (&rcp->rcucblist == rcp->donetail) @@ -169,7 +170,9 @@ static void rcu_process_callbacks(struct rcu_ctrlblk *rcp) list->func(list); local_bh_enable(); list = next; + RCU_TRACE(cb_count++); } + RCU_TRACE(rcu_trace_sub_qlen(rcp, cb_count)); } /* @@ -252,6 +255,7 @@ static void __call_rcu(struct rcu_head *head, local_irq_save(flags); *rcp->curtail = head; rcp->curtail = &head->next; + RCU_TRACE(rcp->qlen++); local_irq_restore(flags); } |