Messages in this thread |  | | Date | Mon, 19 Aug 1996 09:10:04 +0200 (MET DST) | From | Mikael Abrahamsson <> | Subject | Re: interrupt counts |
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On Mon, 19 Aug 1996, Linus Torvalds wrote:
> > > On Mon, 19 Aug 1996, Jon Lewis wrote: > > > > Just out of curiosity, what's going to happen in about 2 months when my > > irq 11 counter hits 4294967296? Will it happily wrap, or are things > > likely to get upset? > > It will happily wrap. The kernel doesn't actually _use_ the interrupt counts > for anything, they are there only for statistics.
Yes, the same way IP-accounting wrapps pretty quickly as well. 4 gigs over a net isnt a lot today. Is this perhaps something that should be considered for 2.1, to convert more and more of these on-busy-machines-will-wrap-within-a-year counters into 64bit ones? I mean, as speed of machines goes up all the time, wouldnt it be nice to be ahead for a while?
Reminds me of Suns "fix" for the problem that the uptime-counter wraps at 256 days uptime. "Reset the machine at around 250 days uptime".. Great fix :)
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