| kern_rwlock.c (303953) | kern_rwlock.c (315339) |
|---|---|
| 1/*- 2 * Copyright (c) 2006 John Baldwin <jhb@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 15 unchanged lines hidden (view full) --- 24 * SUCH DAMAGE. 25 */ 26 27/* 28 * Machine independent bits of reader/writer lock implementation. 29 */ 30 31#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2006 John Baldwin <jhb@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 15 unchanged lines hidden (view full) --- 24 * SUCH DAMAGE. 25 */ 26 27/* 28 * Machine independent bits of reader/writer lock implementation. 29 */ 30 31#include <sys/cdefs.h> |
| 32__FBSDID("$FreeBSD: stable/11/sys/kern/kern_rwlock.c 303953 2016-08-11 09:28:49Z mjg $"); | 32__FBSDID("$FreeBSD: stable/11/sys/kern/kern_rwlock.c 315339 2017-03-16 00:51:24Z mjg $"); |
| 33 34#include "opt_ddb.h" 35#include "opt_hwpmc_hooks.h" 36#include "opt_no_adaptive_rwlocks.h" 37 38#include <sys/param.h> 39#include <sys/kdb.h> 40#include <sys/ktr.h> --- 54 unchanged lines hidden (view full) --- 95#ifdef ADAPTIVE_RWLOCKS 96static int rowner_retries = 10; 97static int rowner_loops = 10000; 98static SYSCTL_NODE(_debug, OID_AUTO, rwlock, CTLFLAG_RD, NULL, 99 "rwlock debugging"); 100SYSCTL_INT(_debug_rwlock, OID_AUTO, retry, CTLFLAG_RW, &rowner_retries, 0, ""); 101SYSCTL_INT(_debug_rwlock, OID_AUTO, loops, CTLFLAG_RW, &rowner_loops, 0, ""); 102 | 33 34#include "opt_ddb.h" 35#include "opt_hwpmc_hooks.h" 36#include "opt_no_adaptive_rwlocks.h" 37 38#include <sys/param.h> 39#include <sys/kdb.h> 40#include <sys/ktr.h> --- 54 unchanged lines hidden (view full) --- 95#ifdef ADAPTIVE_RWLOCKS 96static int rowner_retries = 10; 97static int rowner_loops = 10000; 98static SYSCTL_NODE(_debug, OID_AUTO, rwlock, CTLFLAG_RD, NULL, 99 "rwlock debugging"); 100SYSCTL_INT(_debug_rwlock, OID_AUTO, retry, CTLFLAG_RW, &rowner_retries, 0, ""); 101SYSCTL_INT(_debug_rwlock, OID_AUTO, loops, CTLFLAG_RW, &rowner_loops, 0, ""); 102 |
| 103static struct lock_delay_config rw_delay = { 104 .initial = 1000, 105 .step = 500, 106 .min = 100, 107 .max = 5000, 108}; | 103static struct lock_delay_config __read_mostly rw_delay; |
| 109 | 104 |
| 110SYSCTL_INT(_debug_rwlock, OID_AUTO, delay_initial, CTLFLAG_RW, &rw_delay.initial, | 105SYSCTL_INT(_debug_rwlock, OID_AUTO, delay_base, CTLFLAG_RW, &rw_delay.base, |
| 111 0, ""); | 106 0, ""); |
| 112SYSCTL_INT(_debug_rwlock, OID_AUTO, delay_step, CTLFLAG_RW, &rw_delay.step, 113 0, ""); 114SYSCTL_INT(_debug_rwlock, OID_AUTO, delay_min, CTLFLAG_RW, &rw_delay.min, 115 0, ""); | |
| 116SYSCTL_INT(_debug_rwlock, OID_AUTO, delay_max, CTLFLAG_RW, &rw_delay.max, 117 0, ""); 118 | 107SYSCTL_INT(_debug_rwlock, OID_AUTO, delay_max, CTLFLAG_RW, &rw_delay.max, 108 0, ""); 109 |
| 119static void 120rw_delay_sysinit(void *dummy) 121{ 122 123 rw_delay.initial = mp_ncpus * 25; 124 rw_delay.step = (mp_ncpus * 25) / 2; 125 rw_delay.min = mp_ncpus * 5; 126 rw_delay.max = mp_ncpus * 25 * 10; 127} 128LOCK_DELAY_SYSINIT(rw_delay_sysinit); | 110LOCK_DELAY_SYSINIT_DEFAULT(rw_delay); |
| 129#endif 130 131/* 132 * Return a pointer to the owning thread if the lock is write-locked or 133 * NULL if the lock is unlocked or read-locked. 134 */ 135#define rw_wowner(rw) \ 136 ((rw)->rw_lock & RW_LOCK_READ ? NULL : \ --- 1175 unchanged lines hidden --- | 111#endif 112 113/* 114 * Return a pointer to the owning thread if the lock is write-locked or 115 * NULL if the lock is unlocked or read-locked. 116 */ 117#define rw_wowner(rw) \ 118 ((rw)->rw_lock & RW_LOCK_READ ? NULL : \ --- 1175 unchanged lines hidden --- |