Answered my own question.. Its the NUMBER of times a CPU has proccessed a request from a device interrupt.. If any of you all are looking to do some system perfomance howtos i just got the Performance Tunning for Linux Servers from IBM press.. Learning something new with the book.. my 2 cents.. buy it.. how can i find out what the output of for interrupt activity by processor is really showing me.. CPU i000/s i001/s i004/s i007/s i008/s i009/s i014/s i015/s i169/s i177/s i185/s i193/s i201/s i209/s Is it the amount of time the CPU was used to service a system function from the device ?? man pages and google havent helped much.. Thanks -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list