Enhanced top Advanced CPU and Memory Monitoring for Debugging

Source Code Release: Supports thread CPU statistics, memory usage tracking, and more, offering enhanced functionality over BusyBox's built-in top. Primarily used to diagnose task anomalies.

File Structure:

top$ ls
- aclocal.m4
- config.h.in
- configure.in
- depcomp
- install-sh
- Makefile.am
- Makefile.in
- missing
- sched_policy.c
- sched_policy.h
- top.c

Command Usage:

# ./top -h
Usage: ./top [ -m max_procs ] [ -n iterations ] [ -d delay ] [ -s sort_column ] [ -t ] [ -h ]

-m numtMaximum number of processes to display.
-n numtUpdates to show before exiting.
-d numtSeconds to wait between updates.
-s coltColumn to sort by (cpu,vss,rss,thr).
-tttShow threads instead of processes.
-httDisplay this help screen.

Example Output:

User 2%, System 21%, IOW 0%, IRQ 0%
User 5 + Nice 2 + Sys 67 + Idle 232 + IOW 0 + IRQ 0 + SIRQ 0 = 306

PID   TID  PR CPU% S VSS     RSS   PCY UID Thread Proc
425   428  0  21% S 105220K 29316K un  root skyapp ./skyapp
425   439  0   1% R 105220K 29316K un  root skyapp ./skyapp
479    0   1% R 2104K   768K un  root top ./top
...

Each column provides comprehensive process and thread details, helping in pinpointing performance bottlenecks effectively.