atop

New features were added to cumulate utilization of CPU and memory (and disk and network if kernel patches are installed) per user or per program name. Support for process accounting version 3 (which is used by Mandriva) was added and minor bugfixes were made.

Analysis of disk I/O and network utilization on the process level was enabled. This requires kernel patches that maintain additional per-process counters. Various bugfixes were made and the man page was modified.

This release features recognition of thread-groups: every
thread is shown as a separate process with a reference to its
thread-group and an indication whether it is a thread-group
leader or member. CPU percentages on the system and
process levels have been made consistent. A new
subcommand to show scheduling information, such as policy,
realtime priority, and sleep average was added. There were
various bugfixes.

This version has been ported to kernel-version
2.6. Selections for process-names and user-names
are based on regular expressions now. Recognition
of disk-names was improved. Minor bugfixes were
made.

All internal counters are 64-bit to support larger
systems. Per-CPU statistics are maintained for
multiprocessor systems. Personal defaults can be
configured via the ~/.atoprc file. System-level
statistics for disks, network-interfaces, and
CPU's are sorted on activity. A maximum number of
screen-lines can be specified for every resource
(e.g. when 40 disks are installed in your system,
you can specify to show the 5 most active disks
only). Two new subcommands were added. The layout
of the raw logfiles is incompatible with earlier
versions, due to the enlarged counters.