Add delay accounting

[jbd]

Hello,

is there any plan to add delay accounting in atop ?

From https://github.com/torvalds/linux/blob/master/Documentation/accounting/delay-accounting.txt:

The per-task delay accounting functionality measures
the delays experienced by a task while

a) waiting for a CPU (while being runnable)
b) completion of synchronous block I/O initiated by the task
c) swapping in pages
d) memory reclaim

and makes these statistics available to userspace through
the taskstats interface.

Code example from the kernel: https://github.com/torvalds/linux/blob/master/tools/accounting/getdelays.c
(recent) Implementation in htop: hishamhm/htop#665

Nice blog post about the htop implementation: https://andrestc.com/post/linux-delay-accounting/