You can also combine binary input files from different systems, made at different times, with differing subsets of subsystems for which data has been collected. Filtering options such as e, s, P, and D can be used with this function. Where appropriate, data is presented in units per second. For example, disk data such as KiloBytes transferred, or the number of transfers, is always normalized for 1 second. This happens no matter what time interval is chosen.
Memory pages out, pages in, pages zeroed pages reactivated and pages copied on write.
Network packets in, packets out, and collisions. Process user and system time consumed. Other data is recorded as a snapshot value. If the optional second integer is given, this is a separate time interval which applies only to the process subsystem. The process interval must be a multiple of the regular interval.