An information processing unit, a computer control method, and an information storage device are provided to acquire performance information during data processing and realize efficient data processing by changing data processing details as appropriate based on the information. An information processing unit includes: a data processing part 70 that processes data, an event detecting part 72 that detects predetermined events in the processing of the data processing part 70, a frequency information storage part 74 that stores frequency information the occurrence of the predetermined events detected by the event detecting part 72, a restriction judging part 76 that judges whether or not the processing of the data processing part 70 have been restricted based on the frequency information stored in the frequency information storage part 74, and a processing changing part 78 that changes details of the processing of the data processing part 70 when the restriction judging part 76 judges that the processing of the data processing part 70 have been restricted.