Question

Given: A recently-released Dell server became available. We seek to determine its performance rating using the SPEC procedure according to the four benchmarks listed below: System Integer Encryption Graphics Database Reference 2 sec 8 sec 0.8 sec 2 sec Dell server 500 msec2000 msec 100msec 500msec Partial What is the SPECRatio of the Dell Credit 1: server for the Integer benchmark? Partial What is the SPECscore of the Dell Credit 2: server? Round your answer to the nearest integer.

Answer 1

SPEC ratio is used to compare the performance of a device with a reference device in regards to a particular benchmark.

SPEC ratio = time taken by reference computer / time taken by device whose rating is to be measured

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(a) Here we have to compute SPEC ratio with respect to the Integer benchmark.

Reference time = 2 sec

Time taken by device = 500 ms = 0.5 sec

SPEC ratio = 2 / 0.5 = 4

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(b) SPEC score is the geometric mean of all the SPEC ratios of the computer.

GeometricMean - Í SPECRatio, 1 =

We have already computed the SPEC ratio of the Integer benchmark. Let's do the same for other benchmarks.

For the Encryption benchmark,

Reference time = 8 sec

Time taken by device = 2000 ms = 2 sec

SPEC ratio = 8 / 2 = 4

For the Graphics benchmark,

Reference time = 0.8 sec

Time taken by device = 100 ms = 0.1 sec

SPEC ratio = 0.8 / 0.1 = 8

For the Database benchmark,

Reference time = 2 sec

Time taken by device = 500 ms = 0.5 sec

SPEC ratio = 2 / 0.5 = 4

Finally, we calculate the SPEC score as follows :

SPEC score = ( 4 * 4 * 8 * 4)^1/4 = (512)^1/4 = 4.756

Since, we are asked to round it to the nearest integer, the answer becomes 5.

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Let me know if you have any doubts in the comments. Please upvote if the answer helped you.

GeometricMean - Í SPECRatio, 1 =