Re: Reading /proc/stat is slooow

[Andreas Schwab]

"Luck, Tony" <tony.luck@xxxxxxxxx> writes:

> 2) The problem loop is already #ifdef'd out for PPC64 and ALPHA.  We could add
> IA64 to that exclusive club and just not include the per irq sums.  Since kstat_irqs()
> computes the sums in an "int", they will wrap frequently on a large system
> (512 cpus * default 250Hz = 128000 ... which wraps a 32-bit unsigned in 9 hours
> and 19 minutes) ... so their usefulness is questionable.  Does xosview use
> the per-irq values?

It doesn't use them, it uses /proc/interrupts instead.  So IMHO this would
be the preferred solution.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@xxxxxxx
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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