1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * This program is free software; you can redistribute it and/or modify
4  * it under the terms of the GNU General Public License as published by
5  * the Free Software Foundation; either version 2 of the License, or
6  * (at your option) any later version.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * Authors: Waiman Long <longman@redhat.com>
14  */
15 
16 #ifndef LOCK_EVENT
17 #define LOCK_EVENT(name)	LOCKEVENT_ ## name,
18 #endif
19 
20 #ifdef CONFIG_QUEUED_SPINLOCKS
21 #ifdef CONFIG_PARAVIRT_SPINLOCKS
22 /*
23  * Locking events for PV qspinlock.
24  */
25 LOCK_EVENT(pv_hash_hops)	/* Average # of hops per hashing operation */
26 LOCK_EVENT(pv_kick_unlock)	/* # of vCPU kicks issued at unlock time   */
27 LOCK_EVENT(pv_kick_wake)	/* # of vCPU kicks for pv_latency_wake	   */
28 LOCK_EVENT(pv_latency_kick)	/* Average latency (ns) of vCPU kick	   */
29 LOCK_EVENT(pv_latency_wake)	/* Average latency (ns) of kick-to-wakeup  */
30 LOCK_EVENT(pv_lock_stealing)	/* # of lock stealing operations	   */
31 LOCK_EVENT(pv_spurious_wakeup)	/* # of spurious wakeups in non-head vCPUs */
32 LOCK_EVENT(pv_wait_again)	/* # of wait's after queue head vCPU kick  */
33 LOCK_EVENT(pv_wait_early)	/* # of early vCPU wait's		   */
34 LOCK_EVENT(pv_wait_head)	/* # of vCPU wait's at the queue head	   */
35 LOCK_EVENT(pv_wait_node)	/* # of vCPU wait's at non-head queue node */
36 #endif /* CONFIG_PARAVIRT_SPINLOCKS */
37 
38 /*
39  * Locking events for qspinlock
40  *
41  * Subtracting lock_use_node[234] from lock_slowpath will give you
42  * lock_use_node1.
43  */
44 LOCK_EVENT(lock_pending)	/* # of locking ops via pending code	     */
45 LOCK_EVENT(lock_slowpath)	/* # of locking ops via MCS lock queue	     */
46 LOCK_EVENT(lock_use_node2)	/* # of locking ops that use 2nd percpu node */
47 LOCK_EVENT(lock_use_node3)	/* # of locking ops that use 3rd percpu node */
48 LOCK_EVENT(lock_use_node4)	/* # of locking ops that use 4th percpu node */
49 LOCK_EVENT(lock_no_node)	/* # of locking ops w/o using percpu node    */
50 #endif /* CONFIG_QUEUED_SPINLOCKS */
51 
52 /*
53  * Locking events for rwsem
54  */
55 LOCK_EVENT(rwsem_sleep_reader)	/* # of reader sleeps			*/
56 LOCK_EVENT(rwsem_sleep_writer)	/* # of writer sleeps			*/
57 LOCK_EVENT(rwsem_wake_reader)	/* # of reader wakeups			*/
58 LOCK_EVENT(rwsem_wake_writer)	/* # of writer wakeups			*/
59 LOCK_EVENT(rwsem_opt_lock)	/* # of opt-acquired write locks	*/
60 LOCK_EVENT(rwsem_opt_fail)	/* # of failed optspins			*/
61 LOCK_EVENT(rwsem_opt_nospin)	/* # of disabled optspins		*/
62 LOCK_EVENT(rwsem_rlock)		/* # of read locks acquired		*/
63 LOCK_EVENT(rwsem_rlock_steal)	/* # of read locks by lock stealing	*/
64 LOCK_EVENT(rwsem_rlock_fast)	/* # of fast read locks acquired	*/
65 LOCK_EVENT(rwsem_rlock_fail)	/* # of failed read lock acquisitions	*/
66 LOCK_EVENT(rwsem_rlock_handoff)	/* # of read lock handoffs		*/
67 LOCK_EVENT(rwsem_wlock)		/* # of write locks acquired		*/
68 LOCK_EVENT(rwsem_wlock_fail)	/* # of failed write lock acquisitions	*/
69 LOCK_EVENT(rwsem_wlock_handoff)	/* # of write lock handoffs		*/
70