Acquire io

| 686322 || 87 | wait/synch/mutex/mysys/THR_LOCK_malloc | 320535 || 88 | wait/synch/mutex/mysys/THR_LOCK_malloc | 339390 || 89 | wait/synch/mutex/mysys/THR_LOCK_malloc | 377100 || 90 | wait/synch/mutex/sql/LOCK_plugin | 614673 || 91 | wait/synch/mutex/sql/LOCK_open | 659925 || 92 | wait/synch/mutex/sql/THD::LOCK_thd_data | 494001 || 93 | wait/synch/mutex/mysys/THR_LOCK_malloc | 222489 || 94 | wait/synch/mutex/mysys/THR_LOCK_malloc | 214947 || 95 | wait/synch/mutex/mysys/LOCK_alarm | 312993 |+----------+-----------------------------------------+------------+ As new events are added to a history table, older events are discarded if the table is full. Summary tables provide aggregated information for all events over time. The tables in this group summarize event data in different ways. To see which instruments have been executed the most times or have taken the most wait time, sort the events_waits_summary_global_by_event_name table on the COUNT_STAR or SUM_TIMER_WAIT column, which correspond to a COUNT(*) or SUM(TIMER_WAIT) value, respectively, calculated over all events: mysql> SELECT EVENT_NAME, COUNT_STAR FROM performance_schema.events_waits_summary_global_by_event_name ORDER BY COUNT_STAR DESC LIMIT 10;+---------------------------------------------------+------------+| EVENT_NAME | COUNT_STAR |+---------------------------------------------------+------------+| wait/synch/mutex/mysys/THR_LOCK_malloc | 6419 || wait/io/file/sql/FRM | 452 || wait/synch/mutex/sql/LOCK_plugin | 337 || wait/synch/mutex/mysys/THR_LOCK_open | 187 || wait/synch/mutex/mysys/LOCK_alarm | 147 || wait/synch/mutex/sql/THD::LOCK_thd_data | 115 || wait/io/file/myisam/kfile | 102 || wait/synch/mutex/sql/LOCK_global_system_variables | 89 || wait/synch/mutex/mysys/THR_LOCK::mutex | 89 || wait/synch/mutex/sql/LOCK_open | 88 |+---------------------------------------------------+------------+mysql> SELECT EVENT_NAME, SUM_TIMER_WAIT FROM performance_schema.events_waits_summary_global_by_event_name ORDER BY SUM_TIMER_WAIT DESC LIMIT 10;+----------------------------------------+----------------+| EVENT_NAME | SUM_TIMER_WAIT |+----------------------------------------+----------------+| wait/io/file/sql/MYSQL_LOG | 1599816582 || wait/synch/mutex/mysys/THR_LOCK_malloc | 1530083250 || wait/io/file/sql/binlog_index | 1385291934 || wait/io/file/sql/FRM | 1292823243 || wait/io/file/myisam/kfile | 411193611 || wait/io/file/myisam/dfile | 322401645 || wait/synch/mutex/mysys/LOCK_alarm | 145126935 || wait/io/file/sql/casetest | 104324715 || wait/synch/mutex/sql/LOCK_plugin | 86027823 || wait/io/file/sql/pid | 72591750 |+----------------------------------------+----------------+ These results show that the THR_LOCK_malloc mutex is “hot,” both in terms of how often it is used and amount of time that threads wait attempting to acquire it.Note The THR_LOCK_malloc mutex is used only in debug builds. In production builds it is not hot because it is nonexistent. Instance tables document what

To the system whenever It notices a pilot in neighbor or remaining set exceeds T_ADD An active set pilot drops below T_DROP for T_TDROP time A candidate pilot exceeds an active by T_COMP The System may set up all requested handoffs, or it may apply special manufacturer-specific screening criteria and only authorize someExercise How does a pilot in one set migrate into another set, for all cases? Identify the trigger, and the messages involved. 41Softer HandoffBSC Switch Sel.Each BTS sector has unique PN offset pilot Handset will ask for whatever pilots it wants If multiple sectors of one BTS simultaneously serve a handset, this is called Softer Handoff Handset cant tell the difference, but softer handoff occurs in BTS in a single channel element Handset can even use combination soft-softer handoff on multiple BTS sectors 42What is Ec/Io?Ec/Io cleanness of the pilot foretells the readability of the associated traffic channels guides soft handoff decisions digitally derived ratio of good to bad energy seen by the search correlator at the desired PN offset Never appears higher than Pilots percentage of serving cells transmitted energy Can be degraded by strong RF from other cells, sectors Imperfect orthogonality, other PNs are -20 dB. Can be degraded by noise 43Section FCDMA Call Processing 44Example 1Lets Acquire the System! 45Find a Frequency with a CDMA RF Signal 46How Idle Mobiles Choose CDMA CarriersAt turnon, Idle mobiles use proprietary algorithms to find the initial CDMA carrier intended for them to use Within that CDMA signal, two types of paging channel messages could cause the idle mobile to choose another frequency CDMA Channel List Message and GSRM 47Find Strongest Pilot, Read Sync Channel 48The Configuration MessagesAfter reading the Sync Channel, the mobile is now capable of reading the Paging Channel, which it now monitors constantly Before it is allowed to transmit or operate on this system, the mobile must collect a complete set of configuration messages Collection is a short process -- all configuration messages are repeated on the paging channel every 1.28 seconds The configuration messages contain sequence numbers so the mobile can recognize if any of the messages have been freshly updated as it continues to monitor the paging channel Access parameters message sequence number Configuration message sequence number If a mobile notices a changed sequence number, or if 600 seconds passes since the last time these messages were read, the mobile reads all of

Or equal to IRQL DISPATCH_LEVEL by calling KeAcquireSpinlock().Windows NT provides an optimized version of KeAcquireSpinLock() for use when the caller is already running at DISPATCH_LEVEL. This function is called KeAcquireSpinLockAtDpcLevel().Executive Spin Locks that were acquired with KeAcquireSpinLock() must be released using the function KeReleaseSpinLock().Executive Spin Locks that were acquired with the function KeAcquireSpinLockAtDpcLevel() must be released using the function KeReleaseSpinLockFromDpcLevel().Interrupt Spin Locks, which are sometimes referred to as ISR spin locks, are the rarer of the two types of spin locks on Windows NT.Interrupt Spin Locks operate at a DIRQL, specifically the SynchronizeIrql that is specified when a driver calls IoConnectInterrupt().The Interrupt Spin Lock for a particular interrupt service routine is always acquired by the Microkernel prior to its calling the interrupt service routine.Driver routines other than the interrupt service routine may acquire a particular Interrupt Spin Lock by calling KeSynchronizeExecution().The IO ManagerThe major design characteristics of the Windows NT I/O Subsystem:Consistent and highly structuredPortable across processor architecturesConfigurableAs frequently pre-emptible and interruptible as possibleMultiprocessor safe on MP systemsObject-basedAsynchronousPacket-drivenLayeredThe Windows NT I/O Subsystem is based on a collection of "objects." These objects are defined by the Microkernel, HAL, and the I/O Manager and exported to other Kernel mode modules, including device drivers.The NT operating system in general, and the I/O Subsystem in particular, is object-based, but not necessarily object-oriented.Most objects used within the I/O Subsystem are considered partially opaque. This means that a subset of fields within the object can be directly manipulated by kernel modules, including drivers. Examples of partially

Thermal detonator that adheres to the target and detonates after several seconds.Energy BurstUnleashes your stored energy to decimate the target.MercenaryIf the best defense is a good offense, the Mercenary’s got the most intimidating defense in the galaxy; heavily modified blasters and deadly heat-seeking missiles make the Mercenary a mobile heavy weapons platform. There’s no problem extra firepower can’t solve, and no one with sense gets between a Mercenary and his or her target.All Mercenaries learn how to fire two blasters at once, and can opt to learn the skills of a Bodyguard, using state-of-the-art medical technologies to heal and protect allies; acquire an Arsenal of advanced rockets to rapidly deal damage; and access Advanced Prototypes including fiery missiles and darts to reduce an enemy’s survivability and regenerative capacity.Base Class: Bounty Hunter. If the best defense is a good offense, the Mercenary’s got the most intimidating defense in the galaxy. Heavily-modded blasters and deadly heatseeking missiles make the Mercenary a mobile heavy weapons platform. There’s no problem extra firepower can’t solve, and no one who knows what he’s doing gets between a Mercenary and his target. Preferred style: Dual Pistols, Rockets. Available Combat Disciplines: Bodyguard, Arsenal, Innnovative Ordnance.Bodyguard (Healer)The Bodyguard Mercenary specializes in personal-security services, positioning themselves as the best protection credits can buy. A veried array of kolto dispersement instruments provide them with protective shells and time-release infusions, offering save haven in the most hostile situations.Key abilities:Healing ScanHeals a friendly target.Kolto MissileHeals multiple allies within the targeted area.Kolto ShellDoploys a Kolto Shell that heals the target when it takes damage.Progressive ScanHeals an ally over a short channeled duration and multiple allies with the final shot of the channel.To learn more, read the In-Depth Bodyguard 6.0 Mercenary PvE Class GuideArsenal (Damage) The Arsenal Mercenary specializes in distance attacks, employing long-range weapons to demolish anyone unlucky enough to be in their sights. Devastating missile-fire combinations and relentless blaster volleys generate a spectacle of explosive brilliance, transforming the Bounty Hunter into an artillery platform.Key abilities:Tracer MissileLaunches a missile at the target, that damages them and lowers their armor.Heatseeker MissilesFires several missiles that deal massive damage.Priming ShotFires a priming shot that deals weapon damage and allows an instant use of the next Tracer Missile.Blazing BoltsFires a continuous blaze of blaster bolts at the target, while stunning weaker enemies.Innovative Ordnance (Damage)Taking advantage of chaos they’ve created is what the IO Mercenary is all about. With an arsenal of explosive and piercing munitions, the IO Merc’s barrages of missiles, grenades and weapon blasts cause lasting, destructive damage to all their enemies.Key abilities:Incendiary MissileFires a missile that explodes on contact, igniting the target for elemental damage and damage over time.Thermal DetonatorHurls a thermal detonator that adheres to