diff options
Diffstat (limited to 'kernel/locking/lock_events_list.h')
| -rw-r--r-- | kernel/locking/lock_events_list.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/kernel/locking/lock_events_list.h b/kernel/locking/lock_events_list.h new file mode 100644 index 0000000000..97fb6f3f84 --- /dev/null +++ b/kernel/locking/lock_events_list.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Authors: Waiman Long <longman@redhat.com> + */ + +#ifndef LOCK_EVENT +#define LOCK_EVENT(name) LOCKEVENT_ ## name, +#endif + +#ifdef CONFIG_QUEUED_SPINLOCKS +#ifdef CONFIG_PARAVIRT_SPINLOCKS +/* + * Locking events for PV qspinlock. + */ +LOCK_EVENT(pv_hash_hops) /* Average # of hops per hashing operation */ +LOCK_EVENT(pv_kick_unlock) /* # of vCPU kicks issued at unlock time */ +LOCK_EVENT(pv_kick_wake) /* # of vCPU kicks for pv_latency_wake */ +LOCK_EVENT(pv_latency_kick) /* Average latency (ns) of vCPU kick */ +LOCK_EVENT(pv_latency_wake) /* Average latency (ns) of kick-to-wakeup */ +LOCK_EVENT(pv_lock_stealing) /* # of lock stealing operations */ +LOCK_EVENT(pv_spurious_wakeup) /* # of spurious wakeups in non-head vCPUs */ +LOCK_EVENT(pv_wait_again) /* # of wait's after queue head vCPU kick */ +LOCK_EVENT(pv_wait_early) /* # of early vCPU wait's */ +LOCK_EVENT(pv_wait_head) /* # of vCPU wait's at the queue head */ +LOCK_EVENT(pv_wait_node) /* # of vCPU wait's at non-head queue node */ +#endif /* CONFIG_PARAVIRT_SPINLOCKS */ + +/* + * Locking events for qspinlock + * + * Subtracting lock_use_node[234] from lock_slowpath will give you + * lock_use_node1. + */ +LOCK_EVENT(lock_pending) /* # of locking ops via pending code */ +LOCK_EVENT(lock_slowpath) /* # of locking ops via MCS lock queue */ +LOCK_EVENT(lock_use_node2) /* # of locking ops that use 2nd percpu node */ +LOCK_EVENT(lock_use_node3) /* # of locking ops that use 3rd percpu node */ +LOCK_EVENT(lock_use_node4) /* # of locking ops that use 4th percpu node */ +LOCK_EVENT(lock_no_node) /* # of locking ops w/o using percpu node */ +#endif /* CONFIG_QUEUED_SPINLOCKS */ + +/* + * Locking events for rwsem + */ +LOCK_EVENT(rwsem_sleep_reader) /* # of reader sleeps */ +LOCK_EVENT(rwsem_sleep_writer) /* # of writer sleeps */ +LOCK_EVENT(rwsem_wake_reader) /* # of reader wakeups */ +LOCK_EVENT(rwsem_wake_writer) /* # of writer wakeups */ +LOCK_EVENT(rwsem_opt_lock) /* # of opt-acquired write locks */ +LOCK_EVENT(rwsem_opt_fail) /* # of failed optspins */ +LOCK_EVENT(rwsem_opt_nospin) /* # of disabled optspins */ +LOCK_EVENT(rwsem_rlock) /* # of read locks acquired */ +LOCK_EVENT(rwsem_rlock_steal) /* # of read locks by lock stealing */ +LOCK_EVENT(rwsem_rlock_fast) /* # of fast read locks acquired */ +LOCK_EVENT(rwsem_rlock_fail) /* # of failed read lock acquisitions */ +LOCK_EVENT(rwsem_rlock_handoff) /* # of read lock handoffs */ +LOCK_EVENT(rwsem_wlock) /* # of write locks acquired */ +LOCK_EVENT(rwsem_wlock_fail) /* # of failed write lock acquisitions */ +LOCK_EVENT(rwsem_wlock_handoff) /* # of write lock handoffs */ |