What Is the Bottleneck in the Following System Setup, the CPU

question 15

Essay

What is the bottleneck in the following system setup, the CPU, memory bus, or the disk set?
$\bullet$ The user program continuously performs reads of 64KB blocks, and requires 2 million cycles to process each block.
$\bullet$ The operating system requires 1 million cycles of overhead for each I/O operation.
$\bullet$ The clock rate is 3GHz.
$\bullet$ The maximum sustained transfer rate of the memory bus is 640MB/sec
$\bullet$ The read/write bandwidth of the disk controller and the disk drives is 64MB/sec, disk average seek plus rotational latency is 9ms.
$\bullet$ 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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Definitions:

Encroached Land

Land that is illegally occupied or used by someone else without the owner's permission.

Talking Heads

Headings that are detailed enough to provide an overview of the material in the sections they introduce.

Non-Parallel

Lacking uniformity or consistency in structure, direction, or comparison between different elements or aspects.

Subhead

A secondary headline in a text that divides content into sections, making it easier to read and understand.