**Author**: \N**Source**: Unknown - \N**Please cite**: \N\NThe Computer Activity databases are a collection of computer systems\N activity measures. The data was collected from a Sun Sparcstation\N 20/712 with 128 Mbytes of memory running in a multi-user university\N department. Users would typically be doing a large variety of tasks\N ranging from accessing the internet, editing files or running very\N cpu-bound programs. The data was collected continuously on two\N separate occasions. On both occassions, system activity was gathered\N every 5 seconds. The final dataset is taken from both occasions with\N equal numbers of observations coming from each collection epoch.\N \N System measures used:\N 1. lread - Reads (transfers per second ) between system memory and user memory.\N 2. lwrite - writes (transfers per second) between system memory and user memory.\N 3. scall - Number of system calls of all types per second.\N 4. sread - Number of system read calls per second.\N 5. swrite - Number of system write calls per second . \N 6. fork - Number of system fork calls per second. \N 7. exec - Number of system exec calls per second. \N 8. rchar - Number of characters transferred per second by system read calls.\N 9. wchar - Number of characters transfreed per second by system write calls. \N 10. pgout - Number of page out requests per second.\N 11. ppgout - Number of pages, paged out per second. \N 12. pgfree - Number of pages per second placed on the free list. \N 13. pgscan - Number of pages checked if they can be freed per second.\N 14. atch - Number of page attaches (satisfying a page fault by reclaiming a page in memory) per second.\N 15. pgin - Number of page-in requests per second.\N 16. ppgin - Number of pages paged in per second.\N 17. pflt - Number of page faults caused by protection errors (copy-on-writes). \N 18. vflt - Number of page faults caused by address translation. \N 19. runqsz - Process run queue size.\N 20. freemem - Number of memory pages available to user processes.\N 21. freeswap - Number of disk blocks available for page swapping. \N 22. usr - Portion of time (%) that cpus run in user mode.\N 23. sys - Portion of time (%) that cpus run in system mode.\N 24. wio - Portion of time (%) that cpus are idle waiting for block IO.\N 25. idle - Portion of time (%) that cpus are otherwise idle.\N \N The two different regression tasks obtained from these databases are:\N \N CompAct \N Predict usr, the portion of time that cpus run in user mode from all attributes 1-21.\N \N CompAct(s) \N Predict usr using a restricted number (excluding the paging information (10-18)\N \N Original source: DELVE repository of data. \N Source: collection of regression datasets by Luis Torgo (ltorgo@ncc.up.pt) at\N http://www.ncc.up.pt/~ltorgo/Regression/DataSets.html\N Characteristics: 8192 cases, 13 continuous attributes
cpu_small
OpenML dataset with id 227