Waiman Long | ad53fa1 | 2019-04-04 13:43:16 -0400 | [diff] [blame] | 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 | |
Waiman Long | fb346fd | 2019-04-04 13:43:17 -0400 | [diff] [blame] | 16 | #ifndef __LOCKING_LOCK_EVENTS_H |
| 17 | #define __LOCKING_LOCK_EVENTS_H |
| 18 | |
Waiman Long | ad53fa1 | 2019-04-04 13:43:16 -0400 | [diff] [blame] | 19 | enum lock_events { |
| 20 | |
| 21 | #include "lock_events_list.h" |
| 22 | |
| 23 | lockevent_num, /* Total number of lock event counts */ |
| 24 | LOCKEVENT_reset_cnts = lockevent_num, |
| 25 | }; |
| 26 | |
Waiman Long | fb346fd | 2019-04-04 13:43:17 -0400 | [diff] [blame] | 27 | #ifdef CONFIG_LOCK_EVENT_COUNTS |
Waiman Long | ad53fa1 | 2019-04-04 13:43:16 -0400 | [diff] [blame] | 28 | /* |
| 29 | * Per-cpu counters |
| 30 | */ |
| 31 | DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]); |
| 32 | |
| 33 | /* |
Peter Zijlstra | 2481163 | 2019-05-27 10:23:26 +0200 | [diff] [blame] | 34 | * Increment the statistical counters. use raw_cpu_inc() because of lower |
| 35 | * overhead and we don't care if we loose the occasional update. |
Waiman Long | ad53fa1 | 2019-04-04 13:43:16 -0400 | [diff] [blame] | 36 | */ |
| 37 | static inline void __lockevent_inc(enum lock_events event, bool cond) |
| 38 | { |
| 39 | if (cond) |
Peter Zijlstra | 2481163 | 2019-05-27 10:23:26 +0200 | [diff] [blame] | 40 | raw_cpu_inc(lockevents[event]); |
Waiman Long | ad53fa1 | 2019-04-04 13:43:16 -0400 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | #define lockevent_inc(ev) __lockevent_inc(LOCKEVENT_ ##ev, true) |
| 44 | #define lockevent_cond_inc(ev, c) __lockevent_inc(LOCKEVENT_ ##ev, c) |
| 45 | |
| 46 | static inline void __lockevent_add(enum lock_events event, int inc) |
| 47 | { |
Peter Zijlstra | 2481163 | 2019-05-27 10:23:26 +0200 | [diff] [blame] | 48 | raw_cpu_add(lockevents[event], inc); |
Waiman Long | ad53fa1 | 2019-04-04 13:43:16 -0400 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | #define lockevent_add(ev, c) __lockevent_add(LOCKEVENT_ ##ev, c) |
| 52 | |
Waiman Long | fb346fd | 2019-04-04 13:43:17 -0400 | [diff] [blame] | 53 | #else /* CONFIG_LOCK_EVENT_COUNTS */ |
Waiman Long | ad53fa1 | 2019-04-04 13:43:16 -0400 | [diff] [blame] | 54 | |
| 55 | #define lockevent_inc(ev) |
| 56 | #define lockevent_add(ev, c) |
| 57 | #define lockevent_cond_inc(ev, c) |
| 58 | |
Waiman Long | fb346fd | 2019-04-04 13:43:17 -0400 | [diff] [blame] | 59 | #endif /* CONFIG_LOCK_EVENT_COUNTS */ |
| 60 | #endif /* __LOCKING_LOCK_EVENTS_H */ |