Summary

(No information yet)

License

unknown (from Weka repository)

Dependencies

Tags

arff slurped Weka

Attribute Types

Integer,Floating Point

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# Instances: 8192 / # Attributes: 22
HDF5 (1.1 MB) XML CSV ARFF LibSVM Matlab Octave

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Original Data Format

arff

Name

cpu_act

Version mldata

0

Comment

The Computer Activity databases are a collection of computer systems activity measures. The data was collected from a Sun Sparcstation 20/712 with 128 Mbytes of memory running in a multi-user university department. Users would typically be doing a large variety of tasks ranging from accessing the internet, editing files or running very cpu-bound programs. The data was collected continuously on two separate occasions. On both occassions, system activity was gathered every 5 seconds. The final dataset is taken from both occasions with equal numbers of observations coming from each collection epoch.

System measures used: 1. lread - Reads (transfers per second ) between system memory and user memory. 2. lwrite - writes (transfers per second) between system memory and user memory. 3. scall - Number of system calls of all types per second. 4. sread - Number of system read calls per second. 5. swrite - Number of system write calls per second . 6. fork - Number of system fork calls per second. 7. exec - Number of system exec calls per second. 8. rchar - Number of characters transferred per second by system read calls. 9. wchar - Number of characters transfreed per second by system write calls. 10. pgout - Number of page out requests per second. 11. ppgout - Number of pages, paged out per second. 12. pgfree - Number of pages per second placed on the free list. 13. pgscan - Number of pages checked if they can be freed per second. 14. atch - Number of page attaches (satisfying a page fault by reclaiming a page in memory) per second. 15. pgin - Number of page-in requests per second. 16. ppgin - Number of pages paged in per second. 17. pflt - Number of page faults caused by protection errors (copy-on-writes). 18. vflt - Number of page faults caused by address translation. 19. runqsz - Process run queue size. 20. freemem - Number of memory pages available to user processes. 21. freeswap - Number of disk blocks available for page swapping. 22. usr - Portion of time (%) that cpus run in user mode. 23. sys - Portion of time (%) that cpus run in system mode. 24. wio - Portion of time (%) that cpus are idle waiting for block IO. 25. idle - Portion of time (%) that cpus are otherwise idle.

The two different regression tasks obtained from these databases are:

CompAct Predict usr, the portion of time that cpus run in user mode from all attributes 1-21.

CompAct(s) Predict usr using a restricted number (excluding the paging information (10-18)

Source: collection of regression datasets by Luis Torgo (ltorgo@ncc.up.pt) at http://www.ncc.up.pt/~ltorgo/Regression/DataSets.html Original source: DELVE repository of data. Characteristics: 8192 cases, 22 continuous attributes

Names

lread,lwrite,scall,sread,swrite,fork,exec,rchar,wchar,pgout,

Types

1. numeric
2. numeric
3. numeric
4. numeric
5. numeric
6. numeric
7. numeric
8. numeric
9. numeric
10. numeric

Data (first 10 data points)

lread	lwrite	scall	sread	swrite	fork	exec	rchar	wchar	pgout	...
6	2	1036	103	114	1.0	1.0	172076	355965	0.0	...
1	0	2165	205	101	0.4	1.2	43107	44139	4.8	...
62	77	3806	258	166	1.4	1.4	492142	268706	4.8	...
5	0	4721	256	177	0.99	2.58	524787	174964	14.51	...
42	55	3949	249	244	2.6	4.6	197289	529200	4.2	...
5	1	1692	132	87	0.4	1.8	220194	107031	0.0	...
3	0	635	65	47	3.0	3.0	87465	40740	8.6	...
7	5	1341	240	120	0.4	0.6	718437	672290	0.0	...
159	40	2443	299	262	1.0	1.0	240375	209450	0.0	...
1	0	3322	271	170	1.0	3.2	399277	128680	0.0	...
...	...	...	...	...	...	...	...	...	...	...

Description

A gzip'ed tar containing UCI and UCI KDD datasets (uci-20070111.tar.gz, 17,952,832 Bytes)

URLs

(No information yet)

Publications

Data Source

http://www.ics.uci.edu/~mlearn/MLRepository.html http://kdd.ics.uci.edu/

Measurement Details

Usage Scenario

revision 1

by mldata on 2010-11-06 09:59

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