Re: Unknown HZ value! (1908) Assume 1024.

[Andreas Schwab]

Tom Holroyd <[e-mail]> writes:

|> So what is the 4th value in /proc/stat (procps calls it "other", while
|> the first 3 are "user", "nice", and "sys")?  According to
|> linux/fs/proc/proc_misc.c, it is:
|> 
|> 	jif * smp_num_cpus - (user + nice + system)
|> 
|> formatted with a %lu (the others are just %u).  smp_num_cpus is 1.
|> Things are declared this way:
|> 
|>         unsigned long jif = jiffies;
|>         unsigned int sum = 0, user = 0, nice = 0, system = 0;
|> 
|> So, the problem is that user + nice + system overflows (I'm compiling
|> with gcc 3.0, BTW).
|> 
|> Thanks for the clue; now, how to fix it?

Changing the line to this:

 	jif * smp_num_cpus - user - nice - system

should avoid the overflow.

Andreas.

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Andreas Schwab, SuSE Labs, [e-mail]
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