Modifications for atop:
- Cgroups (version 2) support.
Show the hierarchical structure of cgroups and the related metrics with key/option 'G', and define the cgroup depth with the keys/options 2 till 7. Key/option 8 also shows the processes per cgroup level, except the kernel processes in the root cgroup. Key/option 9 shows the related processes per cgroup level including the kernel processes in the root cgroup. With key/option 'C' the output is sorted on CPU consumption (default), with key/option 'M' on memory consumption, and with key/option 'D' (requires root privileges) on disk utilization.
Note: The collection of cgroup information per process is not supported any more. - Twin mode: live measurement with review option.
In twin mode atop spawns into a lower level process that gathers the counters and writes them to a temporary raw file, and an upper level process that reads the counters from the temporary raw file and presents them to the user.
The reading of the upper level process keeps in pace with the written samples of the lower level process for live measurements. However, when pressing the 'r' (reset to measurement begin), the 'b' (branch to time stamp), or the 'T' (previous sample), the upper level process implicitly pauses with the possibility to review previous samples. The 'z' (explicit pause) can also be used to pause the live measurement. When pressing the 'z' again (continue after pause) viewing of the live measurement will be continued. - Various corrections related to JSON output.
- Improved gathering of current CPU frequency.
- Support more than 500 CPUs.
General:
- The format of the raw file is incompatible with previous versions. Raw files from previous versions can be converted to the new layout with the atopconvert command.