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Topic: Priority


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  Priority queue - Wikipedia, the free encyclopedia
The simplest way to implement a priority queue data type is to keep a list of records containing elements and priorities; removing an element requires searching the list sequentially for the element with the highest priority.
Priority queuing can be used to manage limited resources such as bandwidth on a transmission line from a network router.
Another use of a priority queue is to manage the events in a discrete event simulation.
en.wikipedia.org /wiki/Priority_queue   (444 words)

  
 Rob Krten's Articles and Publications: Device Drivers, Realtime Systems, Fractals, USENET News, Priority Inversion, ...
Priority inversion is defined as an interference between two threads at different priorities, with the thread at the lower priority preventing the thread at the higher priority from getting CPU time.
In the mutex case, above, the priority of L is boosted to match the priority of the highest priority thread that's waiting for the mutex (H in this case).
The priority inversion problem stems from the fact that M is lower priority than X, and a lower priority thread should not prevent a higher priority thread from running.
www.parse.com /~rk/articles/priority.html   (2218 words)

  
 Encyclopedia: Cahn Ingold Prelog priority rules   (Site not responding. Last check: 2007-10-08)
For compounds found in organic chemistry, the Cahn Ingold Prelog priority rules are used to determine the orientation of a molecule for purposes of assigning stereochemistry at a stereocenter and for assigning the name of isomers of molecules possessing double bonds such as alkenes.
After the substituents of a stereocenter have been assigned their priorities, the molecule is so oriented in space that the group with the lowest priority is pointed away from the observer.
If the lowest priority substituent is assigned the number 1, and the highest 4, then the sense of rotation of a route passing through 4, 3 and 2 distinguishes the stereoisomers.
www.nationmaster.com /encyclopedia/Cahn-Ingold-Prelog-priority-rules   (789 words)

  
 Introduction to Priority Inversion - real-time operating system, RTOS, preemption, fixed priority scheduling
Priority inversion is the term for a scenario in which the highest-priority ready task fails to run when it should.
This priority change should take place as soon as the high-priority task begins to pend; it should end when the resource is released.
A beneficial feature of the priority ceiling solution is that tasks can share resources simply by changing their priorities, thus eliminating the need for semaphores.
www.netrino.com /Publications/Glossary/PriorityInversion.html   (1055 words)

  
 esp@cenet helpfiles - Priority Number   (Site not responding. Last check: 2007-10-08)
The Priority number is one or more of the Application Numbers for which priority rights are claimed.
The Priority Number is the same as the Application Number of the claimed priority patent document.
The Priority Number is made up of a Country Code (2 letters), the year of filing (4 digits) and a serial number (variable, 7 digits) A serial number having less than 7 digits must be completed to 7 digits by adding leading zero"s.
ep.espacenet.com /espacenet/EP/EN/help/15363.htm   (194 words)

  
 NVSL Priority Designations   (Site not responding. Last check: 2007-10-08)
Priority of a submission should be marked on a special label affixed to the outside of the shipping container and marked on the submittal form.
This priority is used when known investigation information makes it possible that the observed condition is an FAD/EDI, but cannot be distinguished from an endemic disease/condition; and rapid laboratory diagnostic information is necessary.
Priority A samples are processed the same as Priority 1 samples.
www.aphis.usda.gov /vs/nvsl/Shipping/prioritydesignations.htm   (415 words)

  
 TheStreet.com: Stock Mart: Priority Healthcare
Priority, which directly distributes high-end drugs and pharmacy supplies to customers nationwide, spiked to 48 3/4 on July 30, and it seemed to have more room to run.
Priority's price-to-sales ratio is down to 1.5 from a high of 3.1, and it's on track to post annual earnings of 91 cents per share this year, and $1.25 a share in 2000, a 37% year-over-year earnings growth rate.
Priority's price-to-earnings ratio based on the 2000 projection is 20, meaning it's undervalued compared with its expected growth rate.
www.thestreet.com /stocks/10store/778239.html   (737 words)

  
 Thread Scheduling   (Site not responding. Last check: 2007-10-08)
If two threads of the same priority are waiting for the CPU, the scheduler arbitrarily chooses one of them to run.
Here is another applet, one that implements a fair race, in which both runners have the same priority and an equal chance of being chosen to run.
The reason is that a system that is not time sliced chooses one of the equal-and-highest priority threads to run and allows that thread to run until it relinquishes the CPU (by sleeping, yielding, or finishing its job) or until a higher-priority preempts it.
java.sun.com /docs/books/tutorial/essential/threads/priority.html   (1332 words)

  
 What really happened on Mars?
Tasks on the Pathfinder spacecraft were executed as threads with priorities that were assigned in the usual manner reflecting the relative urgency of these tasks.
However, very infrequently it was possible for an interrupt to occur that caused the (medium priority) communications task to be scheduled during the short interval while the (high priority) information bus thread was blocked waiting for the (low priority) meteorological data thread.
The mutex in question had been initialized with the parameter off; had it been on, the low-priority meteorological thread would have inherited the priority of the high-priority data bus thread blocked on it while it held the mutex, causing it be scheduled with higher priority than the medium-priority communications task, thus preventing the priority inversion.
www.research.microsoft.com /~mbj/Mars_Pathfinder/Mars_Pathfinder.html   (1186 words)

  
 Embedded.com - How to use priority inheritance
Priority inversion occurs when a high-priority task is forced to wait for the release of a shared resource owned by a lower-priority task.
Bounded priority inversion, shown in Figure 1, occurs when low-priority Task L acquires a lock on a shared resource, but before releasing the resource is preempted by high-priority Task H. Task H attempts to acquire the resource but is forced to wait for Task L to finish its critical section.
The priority ceiling must be higher than the highest priority of all tasks that can access the resource, thereby ensuring that a task owning a shared resource won't be preempted by any other task attempting to access the same resource.
www.embedded.com /showArticle.jhtml?articleID=20600062   (4091 words)

  
 Legal Definition of Priority
He who has the precedency in time has the advantage in right, is the maxim of the law; not that time, considered barely in itself, can make any such difference, but because the whole power over a thing being secured to one person, this bars all others from obtaining a title to it afterwards.
In the payment of debts, the United States are entitled to priority when the debtor is insolvent, or dies and leaves an insolvent estate.
The priority was declared to extend to cases in which the insolvent debtor had made a vol-untary assignment of all his property, or in which his effects had been attached as an absconding or absent debtor, on which an act of legal bankruptcy had been committed.
www.lectlaw.com /def2/p160.htm   (182 words)

  
 Priority Inheritance: The Real Story
In this case his hypothesis is that priority inheritance is blindly used by engineers as a panacea for all priority inversion problems, and, because it has drawbacks under certain conditions, it is therefore dangerous and should never be used.
Priority ceiling emulation is an attractive choice when the set of threads contending for the lock is known, when there may be nested locks, and when worst-case behavior is the only concern.
Priority inheritance and priority ceiling emulation are both effective and powerful techniques to prevent uncontrolled priority inversion when locks are used to protect critical sections in a real-time system.
linuxdevices.com /articles/AT5698775833.html   (2055 words)

  
 The ABC’s Of Immigration — Western Hemisphere Priority Dates - July 28, 2003
This article details who may have Western Hemisphere Priority Dates available and how those individuals might be able to use the priority dates to move to the front of the line.
Whenever the principal applicant applied, his children already in existence are entitled to the parent's original priority date as long as the children are under 21 and unmarried at the time the principal applicant established a priority date.
Also, if at the time the priority date was established, there was already a marriage in existence and a child was born of that marriage afterward, that later-born child can still use the priority date.
www.visalaw.com /03jul3/2jul303.html   (1191 words)

  
 Drinking Water Revolving Loan Fund: Priority Point Worksheet: Environmental Health in Minnesota
Priority points for each item may be assigned only once, even if two separate occurrences qualify for priority points in one proposal.
Priority Points = N.A. Greater than 50 percent of the proposed project will replace or repair an existing PWS damaged or destroyed by a natural disaster.
Financial assistance to implement a WHP plan is eligible for priority points (e.g., sealing wells), but financial assistance for the development of WHP plans is not eligible.
www.health.state.mn.us /divs/eh/water/dwrf/ppl/ppworksheet.html   (976 words)

  
 [No title]
An applicant who claims the priority of one or more earlier national>, regional< or international applications for the same invention must indicate on the Request, at the time of filing, the country in or for which it was filed, the date of filing, and the application number.
Note that under PCT Rule 4.10, an applicant may claim the priority of an application filed in or for a State which is a Member of the World Trade Organization (WTO), even if that State is not party to the Paris Convention for the Protection of Industrial Property (Paris Convention).
For use of the priority document in a U.S. national application which entered the national stage from an international application after compliance with 35 U.S.C., see MPEP § 1893.03(c).
www.uspto.gov /web/offices/pac/mpep/documents/1800_1828.htm   (286 words)

  
 Priority   (Site not responding. Last check: 2007-10-08)
Priority for cumulative Grade Point Average (GPA) of 2.0 or greater over a cumulative GPA below 2.0.
Additional priority for a cumulative GPA of 3.0 or greater.
Priority for completion of any of the following guidance/orientation classes: GUID 10, 11A, 12, 14, 16, or 100.
www.sjdccd.cc.ca.us /dept/ar/registration/cal.html   (276 words)

  
 [No title]
Preemption priority defines a relative importance (rank) within the set of flows competing to be admitted into the network.
Preemption Priority takes effect only when a set of flows attempting admission through a node represents overbooking of resources such that based on CAC some would have to be rejected.
All priority elements are examined according to their merging strategy to decide whether they should participate in the merged result (as specified bellow).
www.ietf.org /rfc/rfc2751.txt   (2060 words)

  
 NEA: Low-Performing Schools as Priority Schools - National Education Association
An NEA task force on low-performing schools created a plan of action, NEA’s Priority Schools Initiative, to help guide the Association in responding to this challenge.
NEA and its state and local affiliates are making low-performing schools "priority schools" by urging fundamental changes-changes that will create a safe, orderly environment that focuses on high standards of teaching and learning for all students.
Across the nation, there are examples of schools that, with a bold set of strategies, are focusing all their efforts on learning and improving student achievement.
www.nea.org /priorityschools   (422 words)

  
 Thread Priority on Solaris
Unfortunately the default priority of native threads in the TS and IA scheduling classes is the highest possible priority.
Conversely, a benefit of using lower relative priorities is that in the TS and IA scheduling classes a thread running at lower priorities receives a longer quantum, assuming that it's not preempted mid-quantum by higher priority threads that become ready.
This, in turn, changes the thread's native priority and potentially changes the priority of the LWP on which the native thread is running.
www.selu.edu /Academics/Depts/Cmps/yang/docs/guide/vm/thread-priorities.html   (1482 words)

  
 IntelĀ® Priority Packet - Overview, Installing and Using Priority Packet II
Intel Priority Packet is a utility that lets you set up priority filters to process high priority network traffic before normal traffic.
Priority packet tagging (also known as Traffic Class Expediting) allows the adapter to work with other components of the network (switches, routers) to deliver packets based on priority level.
While High Priority Queue (HPQ) does not provide the precise priority levels of 802.1p and IP ToS tagging, it does assign traffic as either high or low priority, and sends high priority packets first.
www.intel.com /support/network/adapter/ppack/sb/CS-013750.htm   (1089 words)

  
 WDNR - Runoff Management Priority Watersheds
The Priority Watershed and Priority Lake Program provides financial assistance to local units of government in selected watersheds to address land management activities which contribute to urban and rural runoff.
Since the program began, 86 of the state's watersheds and lakes were designated as priority watershed or priority lake projects.
Priority watershed/lake project goals focus on water quality improvements or protection resulting from reductions in pollutant levels delivered to streams, rivers, and lakes.
www.dnr.state.wi.us /org/water/wm/nps/watershed.htm   (520 words)

  
 PRIORITY QUEUE
A priority queue adaptor produces a queue in which values are accessible in an order controlled by a comparison parameter.
Container is the type of container used to hold the priority queue, which by default is vector.
By default, the comparison function object is less, which orders the priority queue from highest to lowest.
acc6.its.brooklyn.cuny.edu /~cis22/stl/priority_queue.htm   (290 words)

  
 NCS Telecommunications Service Priority (TSP)   (Site not responding. Last check: 2007-10-08)
To be assigned an Emergency provisioning priority, the need for a service has to be so critical that the service must be provisioned at the earliest possible time, without regard to the cost to the service user.
By passing a provisioning priority to the prime service vendor, the service user is immediately liable to pay the prime service vendor any authorized costs associated with provisioning the service within a shorter than standard interval.
Essential TSP service provisioning priority levels (i.e., 1, 2, 3, 4, or 5) are requirements by which the service vendor is to adjust its resources to meet the service due date.
www.ncs.gov /tsp/vendors/vendorprovisioning.html   (1388 words)

  
 Priority Health - FAQs   (Site not responding. Last check: 2007-10-08)
You must continue to see your Priority Health doctor and follow Priority Health's rules until you are enrolled in another health plan.
Priority Health must also approve a referral to a provider such as a physical therapist who is outside our network.
If you are a new Priority Health member and are seeing a specialist, call the doctor listed on your ID card for approval to keep seeing the specialist.
www.priority-health.com /products/handbooks/medicaidhandbook/faq   (1798 words)

  
 Configuring Priority Queueing   (Site not responding. Last check: 2007-10-08)
This chapter describes the tasks for configuring priority queueing on a router.
The priority list specifies which queue a packet will be placed in and, optionally, the maximum length of the different queues.
Assign a priority queue for those packets that do not match any other rule in the priority list.
www.cisco.com /univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c/qcpart2/qcpq.htm   (695 words)

  
 NEA: Low-Performing Schools - NEA's Priority Schools Initiative - NEA
The NEA Priority Schools Initiative addresses the needs of students and school employees in America's lowest-performing schools by directing resources to transform them into academically challenging and stimulating learning environments for our nation's children.
NEA has developed a training program designed for delivery to staff members and other stakeholders in priority schools, or any school that has groups of students who are not succeeding at high levels.
NEA will develop model federal and state legislation to ensure priority schools and their staffs have sufficient funding and other resources to lower class size, improve parental involvement, expand instructional time, retain qualified staffs, and employ other effective turnaround strategies.
www.nea.org /priorityschools/neapsi.html   (375 words)

  
 Domestic Mail Manual E120 Priority Mail   (Site not responding. Last check: 2007-10-08)
Priority Mail is First-Class Mail weighing more than 13 ounces and, at the mailer's option, any other mail matter (including regular First-Class Mail) weighing 13 ounces or less.
The marking “Priority” or “Priority Mail” must be placed prominently on the address side of each piece of Priority Mail.
Matter mailed in USPS-provided Priority Mail packaging is subject to Priority Mail rates regardless of how the packaging is reconfigured or how markings may be obliterated.
pe.usps.gov /text/dmm/e120.htm   (483 words)

  
 ScheduPerformance Home
This way, you set the exact priority of a number of programs that are hogs and can run lots of programs at the same time.
What I meant to say was the dvarchive prg and vlan prg work well when the priorities are set to high and my goal was not to have to set the priorities each and every time at bootup.
After several months of using Priority master, as far as I am concerned whether or not to use PM is a no brainer, its a must have utility.
www.prioritymaster.com   (1148 words)

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