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:

Linking Pins

A concept in which managers are seen as linking pins connecting their subordinates with their superiors, facilitating communication and coordination.

Free-Riding

A phenomenon where individuals or entities benefit from resources, goods, or services without paying for the cost of the benefit.

Social Loafing

The phenomenon where individuals exert less effort when working in a group compared to when working alone, often due to perceived imbalances in contribution and accountability.

Free-Riding

The act of benefiting from the efforts of others without contributing one's fair share, often in the context of team or group work.