Mark some more hot global variables with __read_mostly.
MFC after: 1 week
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parent
18cf0a022e
commit
61322a0a8a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=355404
@ -214,7 +214,7 @@ static struct cdevsw xpt_cdevsw = {
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/* Storage for debugging datastructures */
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struct cam_path *cam_dpath;
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u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
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u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS;
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SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
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&cam_dflags, 0, "Enabled debug flags");
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u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
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@ -83,9 +83,9 @@ static struct g_bioq g_bio_run_up;
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* pressures exist. See g_io_schedule_down() for more details
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* and limitations.
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*/
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static volatile u_int pace;
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static volatile u_int __read_mostly pace;
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static uma_zone_t biozone;
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static uma_zone_t __read_mostly biozone;
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/*
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* The head of the list of classifiers used in g_io_request.
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@ -93,8 +93,8 @@ static uma_zone_t biozone;
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* to add/remove entries to the list.
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* Classifiers are invoked in registration order.
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*/
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static TAILQ_HEAD(g_classifier_tailq, g_classifier_hook)
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g_classifier_tailq = TAILQ_HEAD_INITIALIZER(g_classifier_tailq);
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static TAILQ_HEAD(, g_classifier_hook) g_classifier_tailq __read_mostly =
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TAILQ_HEAD_INITIALIZER(g_classifier_tailq);
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#include <machine/atomic.h>
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@ -61,12 +61,12 @@ MALLOC_DEFINE(M_GEOM, "GEOM", "Geom data structures");
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struct sx topology_lock;
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static struct proc *g_proc;
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static struct thread *g_up_td;
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static struct thread *g_down_td;
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static struct thread *g_event_td;
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static struct thread __read_mostly *g_up_td;
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static struct thread __read_mostly *g_down_td;
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static struct thread __read_mostly *g_event_td;
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int g_debugflags;
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int g_collectstats = 1;
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int __read_mostly g_debugflags;
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int __read_mostly g_collectstats = G_STATS_PROVIDERS;
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int g_shutdown;
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int g_notaste;
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@ -82,7 +82,7 @@ struct mtx_pool {
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#define mtx_pool_shift mtx_pool_header.mtxpool_shift
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#define mtx_pool_next mtx_pool_header.mtxpool_next
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struct mtx_pool *mtxpool_sleep;
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struct mtx_pool __read_frequently *mtxpool_sleep;
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#if UINTPTR_MAX == UINT64_MAX /* 64 bits */
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# define POINTER_BITS 64
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@ -217,9 +217,9 @@ SYSCTL_INT(_kern, OID_AUTO, kerneldump_gzlevel, CTLFLAG_RWTUN,
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* Variable panicstr contains argument to first call to panic; used as flag
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* to indicate that the kernel has already called panic.
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*/
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const char *panicstr;
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const char __read_mostly *panicstr;
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int dumping; /* system is dumping */
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int __read_mostly dumping; /* system is dumping */
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int rebooting; /* system is rebooting */
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/*
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* Used to serialize between sysctl kern.shutdown.dumpdevname and list
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@ -130,7 +130,8 @@ SYSCTL_INT(_kern, OID_AUTO, pin_pcpu_swi, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &pin_
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* TODO:
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* allocate more timeout table slots when table overflows.
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*/
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u_int callwheelsize, callwheelmask;
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static u_int __read_mostly callwheelsize;
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static u_int __read_mostly callwheelmask;
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/*
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* The callout cpu exec entities represent informations necessary for
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@ -209,7 +210,7 @@ struct callout_cpu cc_cpu;
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#define CC_UNLOCK(cc) mtx_unlock_spin(&(cc)->cc_lock)
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#define CC_LOCK_ASSERT(cc) mtx_assert(&(cc)->cc_lock, MA_OWNED)
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static int timeout_cpu;
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static int __read_mostly timeout_cpu;
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static void callout_cpu_init(struct callout_cpu *cc, int cpu);
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static void softclock_call_cc(struct callout *c, struct callout_cpu *cc,
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@ -66,7 +66,7 @@ __FBSDID("$FreeBSD$");
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#ifdef KDTRACE_HOOKS
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#include <sys/dtrace_bsd.h>
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int dtrace_vtime_active;
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int __read_mostly dtrace_vtime_active;
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dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
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#endif
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@ -72,7 +72,7 @@ __FBSDID("$FreeBSD$");
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#ifdef KDTRACE_HOOKS
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#include <sys/dtrace_bsd.h>
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int dtrace_vtime_active;
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int __read_mostly dtrace_vtime_active;
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dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
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#endif
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@ -206,23 +206,23 @@ _Static_assert(sizeof(struct thread) + sizeof(struct td_sched) <=
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* sched_slice: Runtime of each thread before rescheduling.
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* preempt_thresh: Priority threshold for preemption and remote IPIs.
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*/
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static int sched_interact = SCHED_INTERACT_THRESH;
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static int tickincr = 8 << SCHED_TICK_SHIFT;
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static int realstathz = 127; /* reset during boot. */
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static int sched_slice = 10; /* reset during boot. */
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static int sched_slice_min = 1; /* reset during boot. */
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static int __read_mostly sched_interact = SCHED_INTERACT_THRESH;
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static int __read_mostly tickincr = 8 << SCHED_TICK_SHIFT;
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static int __read_mostly realstathz = 127; /* reset during boot. */
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static int __read_mostly sched_slice = 10; /* reset during boot. */
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static int __read_mostly sched_slice_min = 1; /* reset during boot. */
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#ifdef PREEMPTION
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#ifdef FULL_PREEMPTION
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static int preempt_thresh = PRI_MAX_IDLE;
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static int __read_mostly preempt_thresh = PRI_MAX_IDLE;
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#else
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static int preempt_thresh = PRI_MIN_KERN;
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static int __read_mostly preempt_thresh = PRI_MIN_KERN;
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#endif
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#else
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static int preempt_thresh = 0;
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static int __read_mostly preempt_thresh = 0;
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#endif
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static int static_boost = PRI_MIN_BATCH;
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static int sched_idlespins = 10000;
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static int sched_idlespinthresh = -1;
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static int __read_mostly static_boost = PRI_MIN_BATCH;
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static int __read_mostly sched_idlespins = 10000;
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static int __read_mostly sched_idlespinthresh = -1;
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/*
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* tdq - per processor runqs and statistics. All fields are protected by the
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@ -262,7 +262,7 @@ struct tdq {
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#define TDQ_IDLE 2
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#ifdef SMP
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struct cpu_group *cpu_top; /* CPU topology */
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struct cpu_group __read_mostly *cpu_top; /* CPU topology */
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#define SCHED_AFFINITY_DEFAULT (max(1, hz / 1000))
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#define SCHED_AFFINITY(ts, t) ((ts)->ts_rltick > ticks - ((t) * affinity))
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@ -272,16 +272,16 @@ struct cpu_group *cpu_top; /* CPU topology */
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*/
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static int rebalance = 1;
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static int balance_interval = 128; /* Default set in sched_initticks(). */
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static int affinity;
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static int steal_idle = 1;
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static int steal_thresh = 2;
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static int always_steal = 0;
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static int trysteal_limit = 2;
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static int __read_mostly affinity;
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static int __read_mostly steal_idle = 1;
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static int __read_mostly steal_thresh = 2;
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static int __read_mostly always_steal = 0;
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static int __read_mostly trysteal_limit = 2;
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/*
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* One thread queue per processor.
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*/
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static struct tdq *balance_tdq;
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static struct tdq __read_mostly *balance_tdq;
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static int balance_ticks;
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DPCPU_DEFINE_STATIC(struct tdq, tdq);
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DPCPU_DEFINE_STATIC(uint32_t, randomval);
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@ -149,7 +149,7 @@ struct bufdomain {
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static struct buf *buf; /* buffer header pool */
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extern struct buf *swbuf; /* Swap buffer header pool. */
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caddr_t unmapped_buf;
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caddr_t __read_mostly unmapped_buf;
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/* Used below and for softdep flushing threads in ufs/ffs/ffs_softdep.c */
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struct proc *bufdaemonproc;
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