# R Dataset / Package MASS / cpus

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## Visual Summaries

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Dataset Help

On this Picostat.com statistics page, you will find information about the cpus data set which pertains to Performance of Computer CPUs. The cpus data set is found in the MASS R package. You can load the cpus data set in R by issuing the following command at the console data("cpus"). This will load the data into a variable called cpus. If R says the cpus data set is not found, you can try installing the package by issuing this command install.packages("MASS") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the cpus R data set. The size of this file is about 9,216 bytes.

Documentation

## Performance of Computer CPUs

### Description

A relative performance measure and characteristics of 209 CPUs.

### Usage

cpus


### Format

The components are:

name

manufacturer and model.

syct

cycle time in nanoseconds.

mmin

minimum main memory in kilobytes.

mmax

maximum main memory in kilobytes.

cach

cache size in kilobytes.

chmin

minimum number of channels.

chmax

maximum number of channels.

perf

published performance on a benchmark mix relative to an IBM 370/158-3.

estperf

estimated performance (by Ein-Dor & Feldmesser).

### Source

P. Ein-Dor and J. Feldmesser (1987) Attributes of the performance of central processing units: a relative performance prediction model. Comm. ACM. 30, 308–317.

### References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

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Dataset imported from https://www.r-project.org.

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