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Consider the following implementation of a spinlock semaphore used with a round-robin preemptive scheduler
a) The compiler generated this code for OS_Signal
Are there any critical sections in OS_Signal? That is, can two threads both call OS_ Signal? Justify your answer.
b) Design a new op-code for the 9S12, and use it to rewrite OS_Wait so the spin lock semaphore can be executed without critical sections and without disabling interrupts. Be VERY specific about what the new instruction does (e.g., addressing modes, condition code bits). The 16-bit pointer, semaPt, will be in Register D when OS_Wait is called.
Consider a 4-in square steel bar subjected to transverse biaxial tensile stresses of 20 ksi in the x direction and 10 ksi in the y direction.
an ideal otto cycle has a compression ratio of 5.3. at the beginning of the compression process p190 kpa t127 c and
block b moves downward with a constant velocity of 20 mms at t0 block a moving upward with a constant acceleration and
starting from rest the motorboat travels around the circular pathp 50m at a speed v0.8tms where t is in seconds.
At a point in a loaded body the stresses relative to an xyz coordinate system are given by the following stresses in MPa xx=xy=40, xz=30, yy=zz=20, xz=0. Determine the normal stress and shear stress on a plane whose outward normal is oriented at angl..
the water side of the wall of a 70-m long dam is quarter circle with radius of 7-m. determine the hydrostatic force on
Exhaust (assumed to have the properties of standard air) leaves the 4-ft-diameter chimney shown in Fig. with a velocity of 6 ft/s. Because of the wind, after a few diameters downstream the exhaust flows in a horizontal direction with the speed of ..
the velocity of a particle at t2 seconds is 50 ms with an angle of 40 degrees down and to the right. at t6 seconds it
Focused, Organized, and Ethical Communication: Describe the importance of ethical communication, particularly in EGR386W. What are some ways in which communication could be unethical, and why might this be concerning to engineers?
A viscous fluid is contained between two infinitely long, vertical, concentric cylinders. The outer cylinder has a radius ro and rotates with an angular velocity v. The inner cylinder is fixed and has a radius ri. Make use of the Navier–Stokes equati..
Rhodium (Rh) has an atomic weight of 102.91 g/mol and atomic radius of 1.345 Å. Determine whether it has an FCC or BCC crystal structure, if its density is 12.41 g/cm3. What is its lattice constant? Explain your answers.
A heat pump has heat-transfer addition at 280 K and heat transfer out at 420 K, and the heat-transfer rate out at 420 K is 900 kJ/min. For each case below, determine from both the Clausis inequality and the Carnot principle for a heat pump whether th..
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