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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2009-04-13 21:31:17 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-14 11:33:43 +0200 |
| commit | 7ba5c840e64d4a967379f1ae3eca73278180b11d (patch) | |
| tree | b77d70ce2b80f3be27add39fcd3bc7fbfe7a0847 /include | |
| parent | 05cfbd66d07c44865983c8b65ae9d0037d874206 (diff) | |
| download | lwn-7ba5c840e64d4a967379f1ae3eca73278180b11d.tar.gz lwn-7ba5c840e64d4a967379f1ae3eca73278180b11d.zip | |
rcu: Add __rcu_pending tracing to hierarchical RCU
Add tracing to __rcu_pending() to provide information on why RCU
processing was kicked off. This is helpful for debugging hierarchical
RCU, and might also be helpful in learning how hierarchical RCU operates.
Located-by: Anton Blanchard <anton@au1.ibm.com>
Tested-by: Anton Blanchard <anton@au1.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: anton@samba.org
Cc: akpm@linux-foundation.org
Cc: dipankar@in.ibm.com
Cc: manfred@colorfullife.com
Cc: cl@linux-foundation.org
Cc: josht@linux.vnet.ibm.com
Cc: schamp@sgi.com
Cc: niv@us.ibm.com
Cc: dvhltc@us.ibm.com
Cc: ego@in.ibm.com
Cc: laijs@cn.fujitsu.com
Cc: rostedt@goodmis.org
Cc: peterz@infradead.org
Cc: penberg@cs.helsinki.fi
Cc: andi@firstfloor.org
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
LKML-Reference: <1239683479943-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/rcutree.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index 58b2aa5312b9..5a5153806c42 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -161,8 +161,15 @@ struct rcu_data { unsigned long offline_fqs; /* Kicked due to being offline. */ unsigned long resched_ipi; /* Sent a resched IPI. */ - /* 5) For future __rcu_pending statistics. */ + /* 5) __rcu_pending() statistics. */ long n_rcu_pending; /* rcu_pending() calls since boot. */ + long n_rp_qs_pending; + long n_rp_cb_ready; + long n_rp_cpu_needs_gp; + long n_rp_gp_completed; + long n_rp_gp_started; + long n_rp_need_fqs; + long n_rp_need_nothing; int cpu; }; |