[Bug 125] New: procps/top: Incorrect summary CPU percentage utilization on 2.4 kernels

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=125

            Target: linux-mips
             Build: 1.13.2
           Summary: procps/top: Incorrect summary CPU percentage utilization
                    on 2.4 kernels
           Product: Busybox
           Version: 1.13.x
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Other
        AssignedTo: unassigned at busybox.net
        ReportedBy: lly.dev at gmail.com
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


Created an attachment (id=71)
 --> (https://bugs.busybox.net/attachment.cgi?id=71)
Fix

I got an incorrect summary CPU percentage utilization with "top" utility in
busybox 1.13.2 (even with latest patches from 2009-02-14) builded for MIPS32
platform on 2.4.37 Linux kernel & uClibc 0.9.29.

Example of top output:
=================================================================
Mem: 18344K used, 11836K free, 0K shrd, 2320K buff, 7064K cached
CPU: 300% usr2700% sys 0% nic47500% idle 0% io 0% irq 0% sirq
Load average: 0.07 0.07 0.07 1/37 392
PID PPID USER STAT VSZ %MEM %CPU COMMAND
=================================================================

Sample content of /proc/stat:
=================================================================
cpu  127 0 846 22406                                                            
cpu0 127 0 846 22406                                                            
page 1840 0                                                                     
swap 0 0                                                                        
intr 24436 0 0 0 48 1009 0 0 23379 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0
disk_io:                                                                        
ctxt 2285                                                                       
btime 4294967292                                                                
processes 155                                                                   
=================================================================

Patch attached, solves the problem.


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