[ntp:questions] Re: linux system clock egregiously slow!

Hal Murray hmurray at suespammers.org
Wed Jan 21 20:08:04 UTC 2004

>I do a lot of PIO, so I wonder if it is possible that the PIO makes
>the kernel lose timer interrupts?  I notice that my timer is implemented
>as a countdown: in arch/mips/kernel/time.c:timer_interrupt(), it says:

I don't know of anything wrong with doing lots of PIO work
unless you do them with interrupts disabled, and then only
if you keep interrupts disabled for a long time.  The problem
is having interrupts disabled, not using PIO.

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