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2c. Unit-6 I_O Performnace.ppt - I/O Performance Measures 1...

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I/O Performance Measures 1. Diversity-Depends on the I/O devices connected to the computer system. 2. Capacity- Number of I/O devices connected to the system. Traditional Measures are: - Response time (latency) - throughput( bandwidth) - In Producer server model the producer creates tasks to be performed and places them in a buffer, the server takes tasks from the first in, first out buffer and performs them. - Response time is defined as the time a task takes from the moment it is placed in the buffer until the server finishes the task. Response time = Queue + Device Service time
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- Throughput=average number of tasks completed by the server over a time period - To get the highest possible throughput, the server should never
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