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Q2: What is the bottleneck in the following system setup, the CPU, memory bus, or the disk set? • The user program continuously performs reads of 64KB blocks, and requires 21 million cycles to process each block. • The operating system requires 1 million cycles of overhead for each I/O operation. • The clock rate is 3GHz. • The maximum sustained transfer rate of the memory bus is 64MB/sec • The read/write bandwidth of the disk controller and the disk drives is 64MB/sec, disk average seek plus rotational latency is 9ms. • There are 20 disks attached to the bus each with its own controller. (Assume that each disk can be controlled independently and ignore disk conflicts.)

Q2: What is the bottleneck in the following system setup, the CPU, memory bus, or the disk set? • The user program continuously performs reads of 64KB blocks, and requires 21 million cycles to process each block. • The operating system requires 1 million cycles of overhead for each I/O operation. • The clock rate is 3GHz. • The maximum sustained transfer rate of the memory bus is 64MB/sec • The read/write bandwidth of the disk controller and the disk drives is 64MB/sec, disk average seek plus rotational latency is 9ms. • There are 20 disks attached to the bus each with its own controller. (Assume that each disk can be controlled independently and ignore disk conflicts.)

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Q2: What is the bottleneck in the following system setup, the CPU, memory bus, or the disk set? • The user program continuously performs reads of 64KB blocks, and requires 21 million cycles to process each block. • The operating system requires 1 million cycles of overhead for each I/O operation. • The clock rate is 3GHz. • The maximum sustained transfer rate of the memory bus is 64MB/sec • The read/write bandwidth of the disk controller and the disk drives is 64MB/sec, disk average seek plus rotational latency is 9ms. • There are 20 disks attached to the bus each with its own controller. (Assume that each disk can be controlled independently and ignore disk conflicts.)
Transcribed Image Text:Q2: What is the bottleneck in the following system setup, the CPU, memory bus, or the disk set? • The user program continuously performs reads of 64KB blocks, and requires 21 million cycles to process each block. • The operating system requires 1 million cycles of overhead for each I/O operation. • The clock rate is 3GHz. • The maximum sustained transfer rate of the memory bus is 64MB/sec • The read/write bandwidth of the disk controller and the disk drives is 64MB/sec, disk average seek plus rotational latency is 9ms. • There are 20 disks attached to the bus each with its own controller. (Assume that each disk can be controlled independently and ignore disk conflicts.)
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