Hi all,

 

I'm trying to find a way to extract/display an overall system "percent CPU
utilization" under QNX4, similar to what you might see with the "top"
program on Linux or the minimized Task Manager under MS Windows.  I would
think that there would be a standard utility for this purpose, along with a
corresponding API, but I haven't found them yet.

 

I wrote a small program to periodically call qnx_psinfo() for the idle
process and then compute the overall CPU utilization as (1 - (idle_time /
wall_time)) * 100, where "idle_time" is the tms_utime value from the
qnx_psinfo() result structure.  This works reasonably well, but after the
system has been up for a long time, tms_utime hits ULONG_MAX and just pegs
itself there, rather than wrapping around to zero (which I could deal with).
At this point, my algorithm becomes useless. 

 

Thanks in advance for any suggestions.

 

 

Thanks!!!

 

Walt Wimer

TCSA, Inc.