Subject: Re: [linux-audio-dev] cycle counter wrapping
From: Paul Barton-Davis (pbd_AT_Op.Net)
Date: ma loka 11 1999 - 22:22:30 EDT
>What happens when the cycle_diff starts to wrap :-)
>Ok, we have 2^64 bits, but wery soon we have 2^32 cycles/s CPUs.
>1 GHz next year, and increasing rapidly (typing on a 180 MHz PPro
>3 years old, assume 10 GHz in another 3 years, ...)
even if we assume 10GHz, the cycle counter won't wrap for 58 years.
2^64 / 10^10 = 1844674407 seconds till wrap
1844674407 / (3600 * 24 * 365) = 58 years till wrap
even Linux might not be up for that kind of uninterrupted uptime :)
also, Moore's Law is supposed to bottom out in 3 to 5 years due to
the fundamental physics of semiconductors.
--p
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