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In this exercise you will extend the preemptive scheduler to support priority. This system should support three levels of priority: 1 will be the highest. You can solve this problem using either assembly or C.
a) Redesign the TCB to include a 16-bit integer for the priority (although the values will be restricted to 1, 2, 3). Show the static allocation for the three threads from the example in this chapter, assuming the first two are priority 2 and the last is priority 3. There are no priority 1 threads in this example, but there might be in the future.
b) Redesign the scheduler to support this priority scheme.
c) In the chapter it said "Normally, we add priority to a system that implements blocking semaphores and not to one that uses spin-lock semaphores." What specifically will happen here if the system is run with spin-lock semaphores?
d) Even when the system supports blocking semaphores, starvation might happen to the low-priority threads. Describe the sequence of events that causes starvation.
e) Suggest a solution to the starvation problem.
Consider 6.0 kg of austenite containing 0.45 wt% C, cooled to below 727 degrees Celcius (1341 degrees Farenheit).
consider a composite wall that includes an 8-mm thick hardwood siding 40mm by 130mm hardwood studs on .65m centers with
7.14 Consider a single crystal of nickel oriented such that a tensile stress is applied along a [001] direction. If slip occurs on a (111) plane and in a [101] direction, and is initiated at an applied tensile stress of 13.9 MPa (2020 psi), comput..
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A conditioned space has a latent load of 12,000 Btu/hr and a sensible load of 20,000 Btu/hr. The space is to be maintained at 75 deg F, 40% rh. Determine the required flow rate of air through the chiller in CFM, and the humidity ratio of the supply a..
A building is priced at $255,000. If a buyer makes a down payment of $55,000 and a payment of $2,000 every month thereafter, how many months will it take for the buyer to completely pay for the building? Interest is charged at a rate of 9% compounded..
1. One pound mass of water in a piston-cylinder assembly, initially a saturated liquid at 1 atm, undergoes a constant- pressure, internally reversible expansion to x 5 90%. Determine the work and heat transfer, each in Btu. Sketch the process on p..
a 14 scale model of a tractor trailer is tested in a wind tunnel under standard sea level conditions. the model
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Develop a computer program for the Gear Transmission Systems with consideration that each gear designer will have a different view as to what the most important design factors are.
Consider an economy with I consumers and L goods, where, for all i, the endowment vector of consumer i is ei , and the utility function of each consumer i is of the form Iui(xi , ) xn), i=1 where xi is the consumption vector of the ith consumer. Assu..
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