Assume that we are going to compute C on both a computer with a single core and shared memory as well as a computer with four cores and shared memory. Calculate the anticipated increase in performance using the machine with four cores, ignoring any potential memory issues.
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Assume that we are going to compute C on both a computer with a single core and shared memory as well as a computer with four cores and shared memory. Calculate the anticipated increase in performance using the machine with four cores, ignoring any potential memory issues.
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- Assume that we are going to compute C on both a computer with a single core and shared memory as well as a computer with four cores and shared memory. Calculate the anticipated increase in performance using the machine with four cores, ignoring any potential memory issues.Assume that we are going to compute C on both a single core shared memory machine and a 4-core shared-memory machine. Compute the speedup we would expect to obtain on the 4-core machine, ignoring any memory issues.A modern computer central processing unit chip (CPU) runs with a clock speed of 2.7 GHz. It can execute one operation in each of these clock cycles. a. How many seconds long is one clock cycle? b. Electrical signals travel at the speed of light. How far can an electrical signal travel in one clock cycle? c. Wires between the CPU's control unit and its cache memory (both on this chip), are about 2 cm long. How does this compare to how far an electrical signal can travel in one clock cycle?
- We may assume that the number of accessible cores in modern CPUs is doubled with each new generation every 18 months. How much more off-chip memory bandwidth would a CPU released in three years need in order to maintain the same per-core performance?Consider two computers, P1 and P2, of the same instruction set (ISA). We have a program of 7.5x10⁹ instructions and we want to run this program on P1 and P2. The P1 computer is a 5 GHz machine with CPI of 0.8. The P2 computer is a 6 GHz machine with CPI of 1.2. How many times that computer is faster than another?We already have RAM (Random Access Memory), a volatile kind of memory, so what's the point of using cache?Cache memory and random-access memory (RAM) both employ semiconductors. Is it conceivable, if at all possible, to employ just one kind of memory to carry out all of a computer's functions?
- Let's pretend that the number of available cores in CPUs increases by one with each new generation, about every 18 months. If we fast forward three years, how much off-chip memory bandwidth would a CPU require to maintain the same per-core speed?Justify the impossibility of continually adding more cores to a CPU in order to boost its performance and keep up with the growth of Moore's Law.A computer employs RAM chips of 128 x 8 and ROM chips of 512 x 8. The computer system needs 1K bytes of RAM, 2K bytes of ROM, and two interface units, each with two registers. A memory-mapped 1/0 configuration is used. The two highest-order bits of the 16-bit address bus are assigned 11 for RAM, 10 for ROM, and 01 for interface registers.a. How many RAM and ROM chips are needed?b. Draw a memory-address map for the system.c. Give the address range in hexadecimal for RAM, ROM, and interface
- A computer employs RAM chips of 512 x 8 and ROM chips of 256 x 8. The computer system needs1K bytes of RAM, 2K bytes of ROM, and eight interface units, each with 2 registers. A memory-mapped1/0 configuration is used. The two highest-order bits of the 16 bit address bus are assigned 10 for RAM,11 for ROM, and 00 for interface registers.a. How many RAM and ROM chips are needed?b. Draw a memory-address map for the system.c. Give the address range in hexadecimal for RAM, ROM, and interface.Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHz clock rate and a CPI of 1.0. P3 has a 4.0 GHz clock rate and has a CPI of 2.2. Which processor has the highest performance expressed in instructions per second? If the processors each execute a program in 10 seconds, find the number of cycles and the number of instructions.A 32-bit microprocessor with the same bus cycle as a 16-bit microprocessor is an example of this. If 20% of the operands and instructions are 32 bits long, 40% are 16 bits long, and 40% are just 8 bits long, then the problem will be solved. Calculate the benefit of using a 32-bit CPU when retrieving instructions and operands.