ad53fa10fa
The percpu event counts used by qspinlock code can be useful for other locking code as well. So a new set of lockevent_* counting APIs is introduced with the lock event names extracted out into the new lock_events_list.h header file for easier addition in the future. The existing qstat_inc() calls are replaced by either lockevent_inc() or lockevent_cond_inc() calls. The qstat_hop() call is renamed to lockevent_pv_hop(). The "reset_counters" debugfs file is also renamed to ".reset_counts". Signed-off-by: Waiman Long <longman@redhat.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Davidlohr Bueso <dbueso@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Will Deacon <will.deacon@arm.com> Link: http://lkml.kernel.org/r/20190404174320.22416-8-longman@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Authors: Waiman Long <longman@redhat.com>
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*/
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enum lock_events {
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#include "lock_events_list.h"
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lockevent_num, /* Total number of lock event counts */
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LOCKEVENT_reset_cnts = lockevent_num,
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};
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#ifdef CONFIG_QUEUED_LOCK_STAT
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/*
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* Per-cpu counters
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*/
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DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]);
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/*
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* Increment the PV qspinlock statistical counters
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*/
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static inline void __lockevent_inc(enum lock_events event, bool cond)
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{
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if (cond)
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__this_cpu_inc(lockevents[event]);
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}
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#define lockevent_inc(ev) __lockevent_inc(LOCKEVENT_ ##ev, true)
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#define lockevent_cond_inc(ev, c) __lockevent_inc(LOCKEVENT_ ##ev, c)
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static inline void __lockevent_add(enum lock_events event, int inc)
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{
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__this_cpu_add(lockevents[event], inc);
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}
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#define lockevent_add(ev, c) __lockevent_add(LOCKEVENT_ ##ev, c)
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#else /* CONFIG_QUEUED_LOCK_STAT */
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#define lockevent_inc(ev)
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#define lockevent_add(ev, c)
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#define lockevent_cond_inc(ev, c)
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#endif /* CONFIG_QUEUED_LOCK_STAT */
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