Important notice before download

• By downloading the software you agree with the license-conditions of the GPL (an open source license). You are strongly advised to read these conditions before you download the software.
• The license states that the software is offered to you "as is", which means that garantee and liability is limited.
• If you have any questions or remarks, please contact the maintainer of this software-package.
• Disclaimer: The authors deny any warranty for any data loss and damage whatsoever that may be caused directly or indirectly by using this software. This is experimental software. Use at your own risk.

Version 1.26

• Modifications for atop:
  1. An additional value is shown for the current frequency and the current scaling percentage of the CPU. When the kernel module 'cpufreq_stats' is active, average values are shown instead of current values.
  2. Additional system-level counters are shown for the total number of threads that are running, sleeping interruptible and sleeping uninterruptible.
  3. When the number of lines in a window is too small for the amount of system-level lines, the number of variable resources (like disks, interfaces, etc) is limited automatically to be able to continue.
  4. Signal SIGUSR2 can be sent to atop to take one more sample and terminate (e.g. used to speed up suspend/hibernate).
  5. Support disk type 'mmcblk'.
• Version 1.26-2 (available since november 18, 2010) contains two bug fixes related to segmentation faults (one caused by memcpy instead of memmove and one caused by not closing /proc/cpuinfo) and a bug fix for a filename consisting of 8 'y'-characters (indicating 8 days ago).
• General: The format of the raw file is incompatible with earlier versions. However, the earlier version of atop is automatically activated when accessing an older raw file.

Version 1.25

• Modifications for atop:
  1. Disk I/O statistics per logical volume (label LVM) and per MD device (label MDD). Number of devices to be shown can be limited, similar to hard disks.
  2. Support of suspend/hibernate (e.g. for laptops).
     At the moment of suspend/hibernate, atop is forced to take one extra sample whereafter it will be terminated. At the moment of resume/thaw, atop is started again (continue in the same raw file or -- in case of a new day -- in a new raw file).
  3. The layout of the output lines with system-level statistics can be redefined in the /etc/atoprc or ~/.atoprc file (see man-page of atoprc). Also the priority of every field with system-level info can be influenced.
  4. Automatic activation of an older version of atop/atopsar when using incompatible raw files. From version 1.25 onwards, atop and atopsar will be preserved as /usr/bin/atop-version and /usr/bin/atopsar-version after deinstallation. The current (newer) version will activate the older version when a raw file must be read that is created by that older version.
     You can preserve a version older than version 1.25 manually. E.g. if you currently use version 1.24, save atop/atopsar before deinstalling version 1.24:

     cp /usr/bin/atop /usr/bin/atop-1.24
     ln -s atop-1.24  /usr/bin/atopsar-1.24
             

     Notice that atop versions < 1.25 do not allow unknown keywords in the rc-file (so do not use keywords that are not supported by such version). From version 1.25 onwards, only a warning is given for an unknown keyword.
  5. Various minor improvements (multiple sorts are eliminated, proper sorting of accumulated user/program statistics, show more active keys in header line, support /dev/fio disks, show Tbytes i.s.o. Gbytes for large sizes).
  6. Various bugfixes (buffer overflow for systems with long uptime, wrong cpu number in per-cpu statistics, wrong uid/gid for exited processes).
• Modifications for atopsar:
  1. Disk I/O statistics per logical volume (flag -l) and per MD device (flag -f).
• General: The format of the raw file is incompatible with earlier versions. However, refer to modification d in the list above.

Version 1.24

• Modifications for atop:
  1. Complete redesign of the screen interface with support of variable number of columns depending on the window size.
     It is also possible to define your own output-line with process-level statistics by using the 'o' key.
     Typing Control-L will force a screen redraw.
  2. Introduce system-wide configuration file /etc/atoprc that can be overruled by your personal ~/.atoprc file.
  3. Improved logfile handling:
     Find the logfile of yesterday, the day before yesterday, etc. by using the flag -r [yy...].
     Branch to a specific time in the logfile by using the 'b' key.
  4. Drop the root-priviliges earlier in case of setuid-root.
  5. More process-level counters like ruid, euid, suid, fsuid and rgid, egid, sgid, fsgid. Also the date and time that a process has finished is maintained.
     More system-level counters like dirty cache size and guest CPU-utilization.
  6. Bugfixes.
• Modifications for atopsar:
  1. More system-level counters like dirty cache size and guest CPU-utilization.
  2. Find the logfile of yesterday, the day before yesterday, etc. by using the flag -r y[y...].
• General: The format of the raw file is incompatible with earlier versions.

Version 1.23

• Modifications for atop:
  1. Gather/show for each process the number of threads that are in the state 'running', 'interruptible sleeping' and 'non-interruptible sleeping'.
  2. Show PPID for each process.
  3. Sort network-interfaces on their busy-percentage and not on the number of transferred packages.
  4. Optionally specify the name of a specific process accounting file by using the environment variable ATOPACCT. If this variable exists but has no value, process accounting will not be used at all.
  5. Bugfixes.
• Modifications for atopsar:
  1. Option to repeat the header of a report every N lines (flag -H).
  2. Option to make summary reports by calculating the average values over a period of N samples (flag -R). For example, if the logfile contains samples of 10 minutes, the option -R6 generates a report with lines containing the averages per hour.
  3. Show the total number of threads that are in the state 'running', 'interruptible sleeping' and 'non-interruptible sleeping' (flag -P).
  4. Show the top-3 of processes that have consumed most CPU time (flag -O), most memory (flag -G), most disk accesses (flag -D) and most network accesses (flag -N only if kernel patches are installed).
  5. Show 100% usage per CPU instead of 100% for all CPUs (now consistent with the output generated by atop).
  6. Rename forks/s to clones/s (this counter reflects thread creations, not process creations).
• General: The format of the raw file is compatible with version 1.21 and 1.22.

Version 1.22

• Modifications for atop:
  1. Addition of colors (default) and markers (flag -M) to reports generated by the command atopsar to highlight that resources are (almost) overloaded.
     Personal default flags for atopsar can also be specified in the file ~/.atoprc now.
  2. Bugfixes (mainly for large and busy machines):

• Modifications for atopsar:
  1. Always use line-buffering on stdout for atopsar, even for pipes and files.
  2. Solve huge exit-codes on 64-bits machines.
  3. Avoid wrong matches on machines with lots of process-creations (reuse of same PID by other program).
  4. Detect process-exit while reading its administration.
  5. Several minor bugfixes.

• General: The format of the raw file is compatible with version 1.21.

Version 1.21

• Introduction of the integrated command atopsar to produce system activity reports similar to the UNIX command sar. These reports can be generated from the (daily) raw files that are written by atop or stand-alone by specifying an interval on the command line.
• Minor bugfixes.
• Warning:
  The format of the raw file is incompatible with previous versions because many counters are added for the command atopsar!

Version 1.20

• Produce unformatted output to be processed by scripts.
• Show steal-percentage for virtual machines.
• Show system-level counters for disks within virtual machines.
• Restructured scripts for daily logging.
• Adapted spec-file and Makefile for improved installation.
• Bugfix: Allow more than 65535 processes to be logged per interval.
• Minor bugfixes.
• Restructure layout of raw logfile.
  Warning: The format of the raw file is incompatible with previous versions!
• Support standard disk I/O statistics per process (kernel 2.6.20 and higher).
  For full accounting of disk I/O and network I/O per process, still the kernel patches are preferred. When these patches are not installed, the standard disk I/O statistics will be shown.