atop v2.6.0.md · xielh/atop

### Modifications for atop:

Sort threads within process.
Individual threads within a process (key 'y') are shown in the order of their TID. 
With the additional key 'Y' threads within a process are sorted based on the current sort criterium.
Show the WCHAN per thread.
With the key 'W' is active, the wait channel is determined per thread and shown with the scheduling information (key 's').
Show runqueue delay per thread/process.
For every process (cumulated) and every thread the time spent waiting on the runqueue is shown as value 'RDELAY'.
Show other modified/new metrics:
PSI pressure during interval time is shown (system-level general).
Counter 'avio' (average I/O time) for fast disks in microseconds or nanoseconds (system-level disk).
Counter 'zfarc' showing the current size of the ARC (cache) for ZFSonlinux (system-level memory).
Counter 'swcac' showing the current size of the swap cache (system-level swap).
Counter LOCKSZ showing the virtual locked memory size (process-level memory).
Bug fixes:
Prevent race condition in cooperation with atopacctd.
Avoid crash with very high load average values.
Fix errors in reading InfiniBand states.

### Modifications for atop and atopsar:

Support of rawlog files spanning multiple days.
The time specification to define the begin time (-b flag) and end time (-e flag) of both atop and atopsar is [YYYYMMDD]hhmm now.
This also applies to the branch key ('b') when using atop interactively.
Support reading rawlog from a pipe.
Rawlog data can be read from a pipe by atop and atopsar with the option '-r -'. In this way, concatenated rawlog data from the command atopcat can be directly processed.

### New program atopcat:
The program atopcat concatenates rawlog files and writes this data to stdout. 
The output can be redirected to a new rawlog file or to atop/atopsar directly via a pipe (see option '-r -' of these commands). 
In this way e.g. weekly or monthly reports or extractions can be created.

### General:

The format of the raw file is compatible with version 2.5.

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