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Mark some more hot global variables with __read_mostly.

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MFC after:	1 week
This commit is contained in:
Alexander Motin 2019-12-04 21:26:03 +00:00
parent 18cf0a022e
commit 61322a0a8a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355404
9 changed files with 37 additions and 36 deletions
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2
sys/cam/cam_xpt.c
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@ -214,7 +214,7 @@ static struct cdevsw xpt_cdevsw = {
/* Storage for debugging datastructures */
struct cam_path *cam_dpath;
u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS;
SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
&cam_dflags, 0, "Enabled debug flags");
u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;

8
sys/geom/geom_io.c
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@ -83,9 +83,9 @@ static struct g_bioq g_bio_run_up;
* pressures exist. See g_io_schedule_down() for more details
* and limitations.
*/
static volatile u_int pace;
static volatile u_int __read_mostly pace;
static uma_zone_t biozone;
static uma_zone_t __read_mostly biozone;
/*
* The head of the list of classifiers used in g_io_request.
@ -93,8 +93,8 @@ static uma_zone_t biozone;
* to add/remove entries to the list.
* Classifiers are invoked in registration order.
*/
static TAILQ_HEAD(g_classifier_tailq, g_classifier_hook)
g_classifier_tailq = TAILQ_HEAD_INITIALIZER(g_classifier_tailq);
static TAILQ_HEAD(, g_classifier_hook) g_classifier_tailq __read_mostly =
TAILQ_HEAD_INITIALIZER(g_classifier_tailq);
#include <machine/atomic.h>

10
sys/geom/geom_kern.c
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@ -61,12 +61,12 @@ MALLOC_DEFINE(M_GEOM, "GEOM", "Geom data structures");
struct sx topology_lock;
static struct proc *g_proc;
static struct thread *g_up_td;
static struct thread *g_down_td;
static struct thread *g_event_td;
static struct thread __read_mostly *g_up_td;
static struct thread __read_mostly *g_down_td;
static struct thread __read_mostly *g_event_td;
int g_debugflags;
int g_collectstats = 1;
int __read_mostly g_debugflags;
int __read_mostly g_collectstats = G_STATS_PROVIDERS;
int g_shutdown;
int g_notaste;

2
sys/kern/kern_mtxpool.c
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@ -82,7 +82,7 @@ struct mtx_pool {
#define mtx_pool_shift mtx_pool_header.mtxpool_shift
#define mtx_pool_next mtx_pool_header.mtxpool_next
struct mtx_pool *mtxpool_sleep;
struct mtx_pool __read_frequently *mtxpool_sleep;
#if UINTPTR_MAX == UINT64_MAX /* 64 bits */
# define POINTER_BITS 64

4
sys/kern/kern_shutdown.c
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@ -217,9 +217,9 @@ SYSCTL_INT(_kern, OID_AUTO, kerneldump_gzlevel, CTLFLAG_RWTUN,
* Variable panicstr contains argument to first call to panic; used as flag
* to indicate that the kernel has already called panic.
*/
const char *panicstr;
const char __read_mostly *panicstr;
int dumping; /* system is dumping */
int __read_mostly dumping; /* system is dumping */
int rebooting; /* system is rebooting */
/*
* Used to serialize between sysctl kern.shutdown.dumpdevname and list

5
sys/kern/kern_timeout.c
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@ -130,7 +130,8 @@ SYSCTL_INT(_kern, OID_AUTO, pin_pcpu_swi, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &pin_
* TODO:
* allocate more timeout table slots when table overflows.
*/
u_int callwheelsize, callwheelmask;
static u_int __read_mostly callwheelsize;
static u_int __read_mostly callwheelmask;
/*
* The callout cpu exec entities represent informations necessary for
@ -209,7 +210,7 @@ struct callout_cpu cc_cpu;
#define CC_UNLOCK(cc) mtx_unlock_spin(&(cc)->cc_lock)
#define CC_LOCK_ASSERT(cc) mtx_assert(&(cc)->cc_lock, MA_OWNED)
static int timeout_cpu;
static int __read_mostly timeout_cpu;
static void callout_cpu_init(struct callout_cpu *cc, int cpu);
static void softclock_call_cc(struct callout *c, struct callout_cpu *cc,

2
sys/kern/sched_4bsd.c
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@ -66,7 +66,7 @@ __FBSDID("$FreeBSD$");
#ifdef KDTRACE_HOOKS
#include <sys/dtrace_bsd.h>
int dtrace_vtime_active;
int __read_mostly dtrace_vtime_active;
dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
#endif

38
sys/kern/sched_ule.c
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@ -72,7 +72,7 @@ __FBSDID("$FreeBSD$");
#ifdef KDTRACE_HOOKS
#include <sys/dtrace_bsd.h>
int dtrace_vtime_active;
int __read_mostly dtrace_vtime_active;
dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
#endif
@ -206,23 +206,23 @@ _Static_assert(sizeof(struct thread) + sizeof(struct td_sched) <=
* sched_slice: Runtime of each thread before rescheduling.
* preempt_thresh: Priority threshold for preemption and remote IPIs.
*/
static int sched_interact = SCHED_INTERACT_THRESH;
static int tickincr = 8 << SCHED_TICK_SHIFT;
static int realstathz = 127; /* reset during boot. */
static int sched_slice = 10; /* reset during boot. */
static int sched_slice_min = 1; /* reset during boot. */
static int __read_mostly sched_interact = SCHED_INTERACT_THRESH;
static int __read_mostly tickincr = 8 << SCHED_TICK_SHIFT;
static int __read_mostly realstathz = 127; /* reset during boot. */
static int __read_mostly sched_slice = 10; /* reset during boot. */
static int __read_mostly sched_slice_min = 1; /* reset during boot. */
#ifdef PREEMPTION
#ifdef FULL_PREEMPTION
static int preempt_thresh = PRI_MAX_IDLE;
static int __read_mostly preempt_thresh = PRI_MAX_IDLE;
#else
static int preempt_thresh = PRI_MIN_KERN;
static int __read_mostly preempt_thresh = PRI_MIN_KERN;
#endif
#else
static int preempt_thresh = 0;
static int __read_mostly preempt_thresh = 0;
#endif
static int static_boost = PRI_MIN_BATCH;
static int sched_idlespins = 10000;
static int sched_idlespinthresh = -1;
static int __read_mostly static_boost = PRI_MIN_BATCH;
static int __read_mostly sched_idlespins = 10000;
static int __read_mostly sched_idlespinthresh = -1;
/*
* tdq - per processor runqs and statistics. All fields are protected by the
@ -262,7 +262,7 @@ struct tdq {
#define TDQ_IDLE 2
#ifdef SMP
struct cpu_group *cpu_top; /* CPU topology */
struct cpu_group __read_mostly *cpu_top; /* CPU topology */
#define SCHED_AFFINITY_DEFAULT (max(1, hz / 1000))
#define SCHED_AFFINITY(ts, t) ((ts)->ts_rltick > ticks - ((t) * affinity))
@ -272,16 +272,16 @@ struct cpu_group *cpu_top; /* CPU topology */
*/
static int rebalance = 1;
static int balance_interval = 128; /* Default set in sched_initticks(). */
static int affinity;
static int steal_idle = 1;
static int steal_thresh = 2;
static int always_steal = 0;
static int trysteal_limit = 2;
static int __read_mostly affinity;
static int __read_mostly steal_idle = 1;
static int __read_mostly steal_thresh = 2;
static int __read_mostly always_steal = 0;
static int __read_mostly trysteal_limit = 2;
/*
* One thread queue per processor.
*/
static struct tdq *balance_tdq;
static struct tdq __read_mostly *balance_tdq;
static int balance_ticks;
DPCPU_DEFINE_STATIC(struct tdq, tdq);
DPCPU_DEFINE_STATIC(uint32_t, randomval);

2
sys/kern/vfs_bio.c
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@ -149,7 +149,7 @@ struct bufdomain {
static struct buf *buf; /* buffer header pool */
extern struct buf *swbuf; /* Swap buffer header pool. */
caddr_t unmapped_buf;
caddr_t __read_mostly unmapped_buf;
/* Used below and for softdep flushing threads in ufs/ffs/ffs_softdep.c */
struct proc *bufdaemonproc;